commit fa5f39d8ffb48d97babfde737562d06576541c6b
Author: RarDog <rardog@rardogsynapse.online>
Date:   Thu Aug 27 12:32:11 2026 +0300

    feat: ZeroSend v2.4.1 - Shared Folders, Media Streaming, Vim Viewer, Portable Mode & Gitea Auto-Updater

diff --git a/.gitignore b/.gitignore
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+ "async-lock",
+ "async-process",
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+ "async-task",
+ "async-trait",
+ "blocking",
+ "enumflags2",
+ "event-listener",
+ "futures-core",
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+ "futures-util",
+ "hex",
+ "nix",
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+ "serde",
+ "serde_repr",
+ "sha1",
+ "static_assertions",
+ "tracing",
+ "uds_windows",
+ "windows-sys 0.52.0",
+ "xdg-home",
+ "zbus_macros 4.4.0",
+ "zbus_names 3.0.0",
+ "zvariant 4.2.0",
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+ "async-executor",
+ "async-io",
+ "async-lock",
+ "async-process",
+ "async-recursion",
+ "async-task",
+ "async-trait",
+ "blocking",
+ "enumflags2",
+ "event-listener",
+ "futures-core",
+ "futures-lite",
+ "hex",
+ "libc",
+ "ordered-stream",
+ "rustix 1.1.4",
+ "serde",
+ "serde_repr",
+ "tracing",
+ "uds_windows",
+ "uuid",
+ "windows-sys 0.61.2",
+ "winnow 1.0.4",
+ "zbus_macros 5.19.0",
+ "zbus_names 4.3.4",
+ "zvariant 5.15.0",
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+ "zvariant 4.2.0",
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+ "zbus_names 4.3.4",
+ "zvariant 5.15.0",
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+[[package]]
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+]
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+[[package]]
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+ "zvariant 5.15.0",
+]
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+[[package]]
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+ "quick-xml 0.30.0",
+ "serde",
+ "static_assertions",
+ "zbus_names 3.0.0",
+ "zvariant 4.2.0",
+]
+
+[[package]]
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+checksum = "556764e583adb45a9f8d413c2a147fa7e8d821e48e12b14fd560b607998b75eb"
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+ "chrono",
+ "clap",
+ "crossterm",
+ "eframe",
+ "futures-util",
+ "hex",
+ "human_bytes",
+ "image",
+ "indicatif",
+ "ipnetwork",
+ "network-interface",
+ "qrcode",
+ "ratatui",
+ "reqwest",
+ "rfd",
+ "serde",
+ "serde_json",
+ "sha2",
+ "socket2 0.5.10",
+ "tokio",
+ "tokio-util",
+ "tower",
+ "tower-http",
+ "tracing",
+ "tracing-subscriber",
+ "tray-icon",
+ "uuid",
+ "walkdir",
+ "windows-sys 0.59.0",
+ "winreg",
+ "winres",
+ "zip",
+]
+
+[[package]]
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+dependencies = [
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+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
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+checksum = "bb0464e17806c1d976d5cba29399c7f08e516e279e2ba493f63123b5fca67dd8"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.6"
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+checksum = "34df6fc39dbd26ddc9c10e6a2984476e13acce22e64e4487636ef494369225da"
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+ "quote",
+ "syn 3.0.4",
+]
+
+[[package]]
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+dependencies = [
+ "arbitrary",
+ "crc32fast",
+ "crossbeam-utils",
+ "displaydoc",
+ "flate2",
+ "indexmap",
+ "memchr",
+ "thiserror 2.0.20",
+ "zopfli",
+]
+
+[[package]]
+name = "zmij"
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+
+[[package]]
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+checksum = "f05cd8797d63865425ff89b5c4a48804f35ba0ce8d125800027ad6017d2b5249"
+dependencies = [
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+ "crc32fast",
+ "log",
+ "simd-adler32",
+]
+
+[[package]]
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+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+[[package]]
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+checksum = "27bc9d5b815bc103f142aa054f561d9187d191692ec7c2d1e2b4737f8dbd7296"
+dependencies = [
+ "zune-core",
+]
+
+[[package]]
+name = "zvariant"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2084290ab9a1c471c38fc524945837734fbf124487e105daec2bb57fd48c81fe"
+dependencies = [
+ "endi",
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+ "serde",
+ "static_assertions",
+ "zvariant_derive 4.2.0",
+]
+
+[[package]]
+name = "zvariant"
+version = "5.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1d34c27cc6cdd1f458427519dd6b8612f7b7e3f7b9a0b2355d041dda9869147"
+dependencies = [
+ "endi",
+ "enumflags2",
+ "serde",
+ "url",
+ "winnow 1.0.4",
+ "zcheapstr",
+ "zvariant_derive 5.15.0",
+ "zvariant_utils 4.2.0",
+]
+
+[[package]]
+name = "zvariant_derive"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73e2ba546bda683a90652bac4a279bc146adad1386f25379cf73200d2002c449"
+dependencies = [
+ "proc-macro-crate 3.5.0",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+ "zvariant_utils 2.1.0",
+]
+
+[[package]]
+name = "zvariant_derive"
+version = "5.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "864155e69b4352db0c7f374917bf45d1e0c8d17659c8b3dbf9795f3673f8c497"
+dependencies = [
+ "proc-macro-crate 3.5.0",
+ "proc-macro2",
+ "quote",
+ "syn 3.0.4",
+ "zvariant_utils 4.2.0",
+]
+
+[[package]]
+name = "zvariant_utils"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c51bcff7cc3dbb5055396bcf774748c3dab426b4b8659046963523cee4808340"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "zvariant_utils"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bad0294361a320b694a328460dc73add56c306150f5cb6bfafc44446120008a3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "serde",
+ "syn 3.0.4",
+ "winnow 1.0.4",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..6d7626e
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,63 @@
+[package]
+name = "zerosend"
+version = "2.4.1"
+edition = "2021"
+description = "Fast, peer-to-peer file transfer designed for ZeroTier, Tailscale, Radmin VPN and LAN"
+authors = ["RarDog"]
+
+[dependencies]
+# Async Runtime & Networking
+tokio = { version = "1.43", features = ["full"] }
+tokio-util = { version = "0.7", features = ["io", "codec"] }
+futures-util = "0.3"
+axum = { version = "0.8", features = ["multipart"] }
+tower = "0.5"
+tower-http = { version = "0.6", features = ["cors", "trace", "fs"] }
+reqwest = { version = "0.12", features = ["stream", "json", "multipart"] }
+socket2 = { version = "0.5", features = ["all"] }
+network-interface = "2.0"
+ipnetwork = "0.20"
+
+# GUI & Dialogs
+eframe = "0.29"
+rfd = "0.15"
+qrcode = "0.14"
+arboard = "3.4"
+image = { version = "0.25", default-features = false, features = ["png"] }
+tray-icon = "0.19"
+zip = { version = "2.2", default-features = false, features = ["deflate"] }
+
+# CLI & TUI
+clap = { version = "4.5", features = ["derive"] }
+ratatui = "0.29"
+crossterm = { version = "0.28", features = ["event-stream"] }
+indicatif = "0.17"
+
+# Serialization & Utils
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+uuid = { version = "1.11", features = ["v4", "serde"] }
+chrono = { version = "0.4", features = ["serde"] }
+sha2 = "0.10"
+hex = "0.4"
+walkdir = "2.5"
+human_bytes = "0.4"
+
+# Windows Native Registry & Sound
+[target.'cfg(windows)'.dependencies]
+winreg = "0.52"
+windows-sys = { version = "0.59", features = ["Win32_UI_WindowsAndMessaging"] }
+
+# Logging
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+[build-dependencies]
+winres = "0.1"
+
+[profile.release]
+opt-level = 3
+lto = "thin"
+codegen-units = 1
+panic = "unwind"
+strip = true
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0d365a8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,74 @@
+# ⚡ ZeroSend v2.4.1 (Shared Folders, HTTP 206 Streaming, Vim Viewer & Portable Mode)
+
+> **Ultra-fast, lightweight, peer-to-peer file & text sharing designed specifically for ZeroTier, Tailscale, Radmin VPN, and LAN networks.**
+
+ZeroSend 2.4.1 is a modern, standalone, privacy-first alternative to LocalSend that is explicitly optimized for virtual mesh networks (ZeroTier, Tailscale, Radmin VPN). It features Network-wide Shared Folders with Read-Only / Read-Write permissions, instant HTTP 206 partial content streaming for video and music without waiting for downloads, an authentic embedded lightweight Vim code and text viewer, a self-contained single-folder portable storage mode (`config.json`), mobile-first Web dropzone with camera/voice-notes shortcuts, dual QR access links, 4-stream parallel chunk streaming, on-the-fly folder ZIP compression, and dynamic light/dark themes.
+
+---
+
+## ✨ Features Overview
+
+### 📁 1. Network Shared Folders & Media Streaming (v2.4.1)
+* **My Shares:** Select any folder on your hard drive to share with friends over ZeroTier/LAN. Configure **Read-Only** (streaming & download) or **Read & Write** (friends can upload files directly to your folder), protected with an optional 4-digit PIN code.
+* **Network Shares Explorer:** Browse your friends' shared directories with interactive breadcrumb path navigation and instant search filtering.
+* **🎬 Instant HTTP 206 Media Streaming:** Watch shared movies, TV series, or listen to music on-the-fly with instant seeking without having to download the entire file first.
+* **⚡ Embedded Vim Code & Text Viewer:** Inspect `.rs`, `.py`, `.js`, `.ts`, `.html`, `.json`, `.toml`, `.cpp`, `.md`, and `.txt` files directly inside ZeroSend with genuine Vim keybindings (`j`/`k`, `Ctrl+d`/`Ctrl+u`, `gg`/`G`, `/` pattern search with live highlights, `:q` exit, `:<line>` line jump).
+* **📦 Single-Folder Portable Mode:** All configuration (`config.json`), downloads, and settings are created and saved directly inside the folder where `zerosend.exe` is located.
+* **🔄 Zero-Config Auto-Sync:** Shared folders are broadcast dynamically via discovery beacons (`DiscoveryBeacon`), automatically appearing when a peer joins the mesh network.
+
+### 📱 2. Mobile-First Web Dropzone & PWA (v2.4.0)
+* **Mobile-First Touch Dashboard:** Optimized for iOS and Android with direct `📸 Photos/Videos`, `📄 Documents`, and `🎙️ Voice Note` recording action chips.
+* **Thumbnail Gallery Previews:** Real-time preview of selected photos and images before sending, with 1-tap delete chips.
+* **🎙️ Mobile Voice Notes:** Built-in Web Audio recorder with live sound wave animation and instant delivery to PC.
+* **📲 PWA Standalone App:** Add to Home Screen support on iOS and Android with custom app icons and manifest.
+* **Dual QR & Access Links:** Separate ZeroTier/VPN mesh link (`http://<zerotier_ip>:53318`) and Home Wi-Fi/LAN link (`http://<local_ip>:53318`) with 1-click copy, QR code, and browser launch.
+* **🛡️ SHA-256 Checksum on the Fly:** Cryptographic hash integrity verification computed in parallel during transmission with green badge status.
+
+### ⚡ 3. High-Performance Multi-Stream Engine
+* **4-Stream Parallel Chunk Transfers:** Automatically splits single large files or batches into concurrent 4x HTTP/TCP streams, eliminating TCP window bottlenecks over VPN links.
+* **Chunk Auto-Retry & Fault Tolerance:** Automatic retry (up to 3 attempts) for failed chunks on Wi-Fi or VPN micro-disconnects without dropping the whole transfer.
+* **Dynamic Adaptive Chunk Sizing:** Scales chunk granularity from 512 KB (small files) up to 8 MB (huge 10GB+ archives) to maximize throughput and minimize overhead.
+* **Live Ping & Latency Indicator:** Real-time round-trip latency (`🟢 12 ms` / `🟡 65 ms` / `🔴 140 ms`) displayed right next to each peer in the Nearby list.
+* **Custom Bandwidth Speed Limiter:** Token-bucket upload rate limiter with interactive custom numeric input and 1-click presets (`Unlimited`, `5`, `10`, `25`, `50`, `100 MB/s`).
+* **Resumable Transfers (.zerosend_part Checkpointing):** Interrupted transfers seamlessly resume from the exact last chunk offset.
+* **Pinned Favorite Friends:** Star (`⭐`) frequently used friends in the **Nearby** tab to pin them to the top.
+
+### 📦 4. On-The-Fly Folder ZIP Compression & Auto-Extract
+* **10x Faster Folder Sharing:** Packages directory trees into streaming Deflate ZIP archives on the fly.
+* **Automatic Extraction:** The recipient's ZeroSend automatically extracts the received ZIP folder right into their Downloads directory.
+* **Web & Mobile Friendly:** Mobile devices downloading via QR code get a clean single `.zip` file with 1 tap.
+
+### 🎨 5. Dynamic Theme & Desktop Polish
+* **🌓 Auto Dark/Light Theme:** Automatically synchronizes with Windows 10/11 system theme or allows forcing Always Dark / Always Light with high-contrast text readability.
+* **System Tray Resident:** Minimizes cleanly to the Windows system tray with auto-popup on incoming file requests.
+* **Drag & Drop Anywhere:** Drag files or folders into the window or directly onto a peer's card in the Nearby list.
+* **Clipboard Screenshots (`Ctrl+V`):** Paste screenshots directly from clipboard to queue them for immediate transfer.
+
+---
+
+## 📜 Version History (Changelog)
+
+### **v2.4.1 (Current Release)**
+* 📁 **Shared Folders Tab:** Dedicated Shared Folders management with Read-Only / Read-Write permissions and PIN security.
+* 🎬 **HTTP 206 Streaming:** Instant real-time video/audio streaming with seeking without downloading entire files.
+* ⚡ **Built-in Vim Code Viewer:** Terminal-style code viewer with full Vim keybindings, search (`/`), and line jump.
+* 📦 **Single-Folder Portable Mode:** All settings (`config.json`) and downloads are created & saved right in the exe folder.
+* 🔄 **Auto-Sync:** Real-time discovery beacon broadcasting of shared folders when connecting to ZeroTier/VPN.
+
+### **v2.4.0**
+* 🛡️ **SHA-256 Checksum on the Fly:** File integrity calculation & verification during streaming with green verification badges.
+* 📸 **Mobile Media Previews:** Thumbnail gallery previews for photos with instant remove buttons before uploading.
+* 🎙️ **Mobile Voice Notes:** Built-in voice recorder with live audio wave pulse animation and one-tap delivery.
+* 📲 **PWA Support:** Web App Manifest & Add to Home Screen standalone install capabilities for mobile browsers.
+* 🎨 **Auto Theme:** Dark/Light theme mode with Windows Registry theme sync & contrast fixes.
+
+---
+
+## 🚀 Building from Source
+
+```bash
+cargo build --release
+```
+
+The compiled standalone binary will be located at:
+`target/release/zerosend.exe`
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..964111e
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,45 @@
+#[cfg(windows)]
+fn main() {
+    let mut res = winres::WindowsResource::new();
+    res.set("FileDescription", "ZeroSend - Fast P2P Mesh File Sharing");
+    res.set("ProductName", "ZeroSend");
+    res.set("ProductVersion", "2.3.2.0");
+    res.set("FileVersion", "2.3.2.0");
+    res.set("CompanyName", "RarDog");
+    res.set("LegalCopyright", "Copyright (C) 2026 RarDog");
+    res.set("OriginalFilename", "zerosend.exe");
+    res.set("InternalName", "zerosend");
+
+    // Standard application manifest
+    res.set_manifest(r#"
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+    <assemblyIdentity
+        version="2.3.2.0"
+        processorArchitecture="*"
+        name="ZeroSend"
+        type="win32"
+    />
+    <description>ZeroSend Fast P2P Mesh File Sharing</description>
+    <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+        <security>
+            <requestedPrivileges>
+                <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+            </requestedPrivileges>
+        </security>
+    </trustInfo>
+    <application xmlns="urn:schemas-microsoft-com:asm.v3">
+        <windowsSettings>
+            <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/pm</dpiAware>
+            <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
+        </windowsSettings>
+    </application>
+</assembly>
+"#);
+
+    if let Err(e) = res.compile() {
+        eprintln!("Warning: failed to compile winres: {}", e);
+    }
+}
+
+#[cfg(not(windows))]
+fn main() {}
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..bb91774
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,204 @@
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::path::PathBuf;
+use tracing::info;
+use uuid::Uuid;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+pub enum ThemeMode {
+    Auto,  // Follow Windows / System theme
+    Dark,  // Always Dark Theme
+    Light, // Always Light Theme
+}
+
+impl Default for ThemeMode {
+    fn default() -> Self {
+        ThemeMode::Auto
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct SharedFolderConfig {
+    pub id: String,
+    pub name: String,
+    pub path: PathBuf,
+    #[serde(default = "default_true")]
+    pub read_only: bool,
+    #[serde(default)]
+    pub pin: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AppConfig {
+    pub peer_id: Option<String>,
+    pub device_name: Option<String>,
+    pub download_dir: PathBuf,
+    pub auto_accept: bool,
+    pub port: u16,
+    pub preferred_interface: Option<String>,
+    pub require_pin: bool,
+    pub pin_code: String,
+    pub peer_aliases: HashMap<String, String>,
+    pub window_width: f32,
+    pub window_height: f32,
+    pub close_to_tray: bool,
+    pub minimize_to_tray: bool,
+    pub auto_zip_folders: bool,
+    pub auto_extract_zip: bool,
+    #[serde(default)]
+    pub max_upload_speed_mbps: u32,
+    #[serde(default = "default_true")]
+    pub sound_notifications: bool,
+    #[serde(default)]
+    pub favorite_peers: Vec<String>,
+    #[serde(default)]
+    pub theme_mode: ThemeMode,
+    #[serde(default)]
+    pub shared_folders: Vec<SharedFolderConfig>,
+    #[serde(default = "default_true")]
+    pub check_updates_on_startup: bool,
+    #[serde(default)]
+    pub gitea_api_url: Option<String>,
+}
+
+fn default_true() -> bool {
+    true
+}
+
+impl Default for AppConfig {
+    fn default() -> Self {
+        let download_dir = get_default_download_dir();
+
+        Self {
+            peer_id: Some(Uuid::new_v4().to_string()),
+            device_name: None,
+            download_dir,
+            auto_accept: false,
+            port: 53318,
+            preferred_interface: None,
+            require_pin: false,
+            pin_code: "1234".to_string(),
+            peer_aliases: HashMap::new(),
+            window_width: 940.0,
+            window_height: 640.0,
+            close_to_tray: true,
+            minimize_to_tray: true,
+            auto_zip_folders: true,
+            auto_extract_zip: true,
+            max_upload_speed_mbps: 0,
+            sound_notifications: true,
+            favorite_peers: Vec::new(),
+            theme_mode: ThemeMode::Auto,
+            shared_folders: Vec::new(),
+            check_updates_on_startup: true,
+            gitea_api_url: None,
+        }
+    }
+}
+
+impl AppConfig {
+    pub fn get_app_dir() -> PathBuf {
+        if let Ok(exe_path) = std::env::current_exe() {
+            if let Some(exe_dir) = exe_path.parent() {
+                // Test if exe directory is writable
+                let test_path = exe_dir.join(".zerosend_write_test");
+                if std::fs::write(&test_path, b"test").is_ok() {
+                    let _ = std::fs::remove_file(&test_path);
+                    return exe_dir.to_path_buf();
+                }
+            }
+        }
+
+        // Fallback to APPDATA if exe directory is read-only
+        if let Some(mut app_data) = get_app_data_dir() {
+            app_data.push("ZeroSend");
+            let _ = std::fs::create_dir_all(&app_data);
+            return app_data;
+        }
+
+        PathBuf::from(".")
+    }
+
+    pub fn config_path() -> PathBuf {
+        Self::get_app_dir().join("config.json")
+    }
+
+    pub fn load() -> Self {
+        let path = Self::config_path();
+
+        // If local config doesn't exist yet, check if there was a legacy APPDATA config to migrate
+        if !path.exists() {
+            if let Some(legacy_dir) = get_app_data_dir() {
+                let legacy_path = legacy_dir.join("ZeroSend").join("config.json");
+                if legacy_path.exists() && legacy_path != path {
+                    if let Ok(content) = std::fs::read_to_string(&legacy_path) {
+                        if let Ok(legacy_cfg) = serde_json::from_str::<AppConfig>(&content) {
+                            info!("Migrated configuration from legacy {:?}", legacy_path);
+                            let _ = legacy_cfg.save();
+                            return legacy_cfg;
+                        }
+                    }
+                }
+            }
+        }
+
+        if path.exists() {
+            if let Ok(content) = std::fs::read_to_string(&path) {
+                if let Ok(mut config) = serde_json::from_str::<AppConfig>(&content) {
+                    if config.peer_id.is_none() {
+                        config.peer_id = Some(Uuid::new_v4().to_string());
+                        let _ = config.save();
+                    }
+                    info!("Loaded configuration from {:?}", path);
+                    return config;
+                }
+            }
+        }
+        let default = Self::default();
+        let _ = default.save();
+        default
+    }
+
+    pub fn save(&self) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+        let path = Self::config_path();
+        if let Some(parent) = path.parent() {
+            let _ = std::fs::create_dir_all(parent);
+        }
+        let json = serde_json::to_string_pretty(self)?;
+        std::fs::write(&path, json)?;
+        info!("Saved configuration to {:?}", path);
+        Ok(())
+    }
+}
+
+fn get_app_data_dir() -> Option<PathBuf> {
+    if let Ok(appdata) = std::env::var("APPDATA") {
+        return Some(PathBuf::from(appdata));
+    }
+    if let Ok(home) = std::env::var("USERPROFILE").or_else(|_| std::env::var("HOME")) {
+        return Some(PathBuf::from(home).join(".config"));
+    }
+    None
+}
+
+fn get_default_download_dir() -> PathBuf {
+    let app_dir = AppConfig::get_app_dir();
+    let portable_downloads = app_dir.join("downloads");
+    if std::fs::create_dir_all(&portable_downloads).is_ok() {
+        return portable_downloads;
+    }
+
+    if let Ok(userprofile) = std::env::var("USERPROFILE") {
+        let downloads = PathBuf::from(userprofile).join("Downloads").join("ZeroSend");
+        let _ = std::fs::create_dir_all(&downloads);
+        return downloads;
+    }
+    if let Ok(home) = std::env::var("HOME") {
+        let downloads = PathBuf::from(home).join("Downloads").join("ZeroSend");
+        let _ = std::fs::create_dir_all(&downloads);
+        return downloads;
+    }
+    let fallback = PathBuf::from("./downloads");
+    let _ = std::fs::create_dir_all(&fallback);
+    fallback
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..0f3f499
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,322 @@
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+mod config;
+mod network;
+mod registry;
+mod transfer;
+mod ui;
+mod updater;
+
+use clap::Parser;
+use config::AppConfig;
+use indicatif::{ProgressBar, ProgressStyle};
+use network::{get_available_interfaces, get_preferred_interface, DiscoveryService, InterfaceInfo, NetworkType};
+use std::net::Ipv4Addr;
+use transfer::{TransferClient, TransferServer, TransferState};
+use ui::{Cli, Commands};
+use uuid::Uuid;
+
+fn get_default_device_name() -> String {
+    if let Ok(name) = std::env::var("COMPUTERNAME") {
+        if !name.is_empty() {
+            return name;
+        }
+    }
+    if let Ok(name) = std::env::var("HOSTNAME") {
+        if !name.is_empty() {
+            return name;
+        }
+    }
+    format!("Node-{}", &Uuid::new_v4().to_string()[..6])
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    let config = AppConfig::load();
+    let cli = Cli::parse();
+
+    // 1. Handle "interfaces" subcommand
+    if let Some(Commands::Interfaces) = &cli.command {
+        let interfaces = get_available_interfaces();
+        println!("\n🔍 Detected Network Interfaces:\n");
+        if interfaces.is_empty() {
+            println!("  No active IPv4 network interfaces found.");
+        } else {
+            for (idx, iface) in interfaces.iter().enumerate() {
+                let badge = match iface.net_type {
+                    NetworkType::ZeroTier => "🌟 [ZeroTier (Preferred)]",
+                    NetworkType::Radmin => "🛡️  [Radmin VPN]",
+                    NetworkType::Tailscale => "⚡ [Tailscale]",
+                    NetworkType::LAN => "🏠 [LAN / Wi-Fi]",
+                    NetworkType::Loopback => "🔄 [Loopback]",
+                    NetworkType::Unknown => "❓ [Other]",
+                };
+
+                println!(
+                    "  [{}] {:<25} -> IP: {:<15} Broadcast: {:<15} {}",
+                    idx + 1,
+                    iface.name,
+                    iface.ip,
+                    iface.broadcast,
+                    badge
+                );
+            }
+        }
+        println!("\nTip: ZeroSend automatically selects ZeroTier if active.\n");
+        return Ok(());
+    }
+
+    // 2. Determine Selected Interface
+    let selected_iface = if let Some(custom_iface) = &cli.interface {
+        let all = get_available_interfaces();
+        all.into_iter()
+            .find(|i| i.name.eq_ignore_ascii_case(custom_iface) || i.ip.to_string() == *custom_iface)
+            .unwrap_or_else(|| {
+                get_preferred_interface().unwrap_or(InterfaceInfo {
+                    name: "loopback".to_string(),
+                    ip: Ipv4Addr::new(127, 0, 0, 1),
+                    netmask: None,
+                    broadcast: Ipv4Addr::new(127, 0, 0, 1),
+                    net_type: NetworkType::Loopback,
+                })
+            })
+    } else if let Some(pref_name) = &config.preferred_interface {
+        let all = get_available_interfaces();
+        all.into_iter()
+            .find(|i| i.name == *pref_name)
+            .unwrap_or_else(|| {
+                get_preferred_interface().unwrap_or(InterfaceInfo {
+                    name: "loopback".to_string(),
+                    ip: Ipv4Addr::new(127, 0, 0, 1),
+                    netmask: None,
+                    broadcast: Ipv4Addr::new(127, 0, 0, 1),
+                    net_type: NetworkType::Loopback,
+                })
+            })
+    } else {
+        get_preferred_interface().unwrap_or(InterfaceInfo {
+            name: "loopback".to_string(),
+            ip: Ipv4Addr::new(127, 0, 0, 1),
+            netmask: None,
+            broadcast: Ipv4Addr::new(127, 0, 0, 1),
+            net_type: NetworkType::Loopback,
+        })
+    };
+
+    let device_name = cli
+        .name
+        .or_else(|| config.device_name.clone())
+        .unwrap_or_else(get_default_device_name);
+
+    let download_dir = config.download_dir.clone();
+    let port = cli.port;
+    let peer_id = config.peer_id.clone().unwrap_or_else(|| Uuid::new_v4().to_string());
+
+    // 3. Handle "ping" subcommand
+    if let Some(Commands::Ping { ip, port }) = &cli.command {
+        println!("🔍 Pinging ZeroSend node at {}:{}...", ip, port);
+        let client = TransferClient::new();
+        match client.ping_peer(ip, *port).await {
+            Ok(beacon) => {
+                println!("\n✨ Node Online!");
+                println!("  Name:        {}", beacon.name);
+                println!("  OS:          {}", beacon.os);
+                println!("  Network:     {}", beacon.net_type);
+                println!("  IP:Port:     {}:{}", beacon.ip, beacon.transfer_port);
+                println!("  Version:     {}", beacon.version);
+            }
+            Err(e) => {
+                eprintln!("❌ Ping failed: {}", e);
+            }
+        }
+        return Ok(());
+    }
+
+    // 4. Handle "send" subcommand (Headless CLI mode)
+    if let Some(Commands::Send { target, files }) = &cli.command {
+        let client = TransferClient::new();
+        let target_url = if target.starts_with("http://") || target.starts_with("https://") {
+            target.clone()
+        } else {
+            format!("http://{}:{}", target, port)
+        };
+
+        let my_info = network::DiscoveryBeacon {
+            peer_id,
+            name: device_name,
+            os: std::env::consts::OS.to_string(),
+            ip: selected_iface.ip,
+            transfer_port: port,
+            net_type: selected_iface.net_type.as_str().to_string(),
+            version: env!("CARGO_PKG_VERSION").to_string(),
+            shared_folders: Vec::new(),
+        };
+
+        println!("📤 Preparing to send {} item(s) to {}...", files.len(), target_url);
+
+        let pb = ProgressBar::new(100);
+        pb.set_style(
+            ProgressStyle::default_bar()
+                .template("{spinner:.green} [{elapsed_precise}] [{bar:40.cyan/blue}] {bytes}/{total_bytes} ({eta}) {msg}")
+                .unwrap()
+                .progress_chars("#>-"),
+        );
+
+        let target_display = target.clone();
+        let res = client
+            .send_files(&target_url, &target_display, &my_info, files, config.auto_zip_folders, config.max_upload_speed_mbps, None, move |progress| {
+                match progress.state {
+                    TransferState::PendingConfirmation => {
+                        pb.set_message("⏳ Waiting for recipient confirmation...");
+                    }
+                    TransferState::InProgress => {
+                        pb.set_length(progress.total_bytes);
+                        pb.set_position(progress.bytes_transferred);
+                        let speed_mb = (progress.speed_bps as f64) / 1_048_576.0;
+                        pb.set_message(format!("{:.1} MB/s | {}", speed_mb, progress.current_file_name));
+                    }
+                    TransferState::Completed => {
+                        pb.finish_with_message("✅ Transfer completed!");
+                    }
+                    TransferState::Failed(e) => {
+                        pb.abandon_with_message(format!("❌ Failed: {}", e));
+                    }
+                    TransferState::Rejected => {
+                        pb.abandon_with_message("⛔ Transfer rejected by recipient.");
+                    }
+                    TransferState::Canceled => {
+                        pb.abandon_with_message("🛑 Canceled.");
+                    }
+                }
+            })
+            .await;
+
+        if let Err(e) = res {
+            eprintln!("\nError sending files: {}", e);
+        }
+        return Ok(());
+    }
+
+    // 5. Handle "receive" subcommand (Headless Server / Daemon mode)
+    if let Some(Commands::Receive { auto_accept }) = &cli.command {
+        let is_auto_accept = *auto_accept || config.auto_accept;
+        let mut discovery = DiscoveryService::new(
+            peer_id.clone(),
+            device_name.clone(),
+            selected_iface.clone(),
+            port,
+        );
+        let shared_summaries: Vec<network::SharedFolderSummary> = config.shared_folders.iter().map(|s| network::SharedFolderSummary {
+            id: s.id.clone(),
+            name: s.name.clone(),
+            read_only: s.read_only,
+            requires_pin: s.pin.is_some(),
+        }).collect();
+        discovery.update_shared_folders(shared_summaries).await;
+        discovery.start().await?;
+
+        let (mut server, _) = TransferServer::new(
+            discovery.my_info().clone(),
+            download_dir.clone(),
+            port,
+            is_auto_accept,
+            config.require_pin,
+            config.pin_code.clone(),
+            config.auto_extract_zip,
+            config.shared_folders.clone(),
+        );
+        server.start().await?;
+
+        println!("\n⚡ ZeroSend Receiver Daemon Running");
+        println!("  Device Name:   {}", device_name);
+        println!("  Interface:     {} ({})", selected_iface.ip, selected_iface.net_type.as_str());
+        println!("  HTTP Endpoint: http://{}:{}", selected_iface.ip, port);
+        println!("  Web Dashboard: http://{}:{}", selected_iface.ip, port);
+        println!("  Downloads Dir: {:?}", download_dir);
+        println!("  Auto-Accept:   {}", is_auto_accept);
+        println!("  Auto-Extract:  {}", config.auto_extract_zip);
+        println!("  PIN Protected: {}\n", config.require_pin);
+        println!("Press Ctrl+C to stop.\n");
+
+        tokio::signal::ctrl_c().await?;
+        println!("\nShutting down ZeroSend...");
+        return Ok(());
+    }
+
+    // 6. Interactive Mode: GUI (Default, no console) or TUI (if --tui is passed)
+    let is_auto_accept = config.auto_accept;
+    let mut discovery = DiscoveryService::new(
+        peer_id.clone(),
+        device_name.clone(),
+        selected_iface.clone(),
+        port,
+    );
+    let shared_summaries: Vec<network::SharedFolderSummary> = config.shared_folders.iter().map(|s| network::SharedFolderSummary {
+        id: s.id.clone(),
+        name: s.name.clone(),
+        read_only: s.read_only,
+        requires_pin: s.pin.is_some(),
+    }).collect();
+    discovery.update_shared_folders(shared_summaries).await;
+    discovery.start().await?;
+
+    let (mut server, channels) = TransferServer::new(
+        discovery.my_info().clone(),
+        download_dir,
+        port,
+        is_auto_accept,
+        config.require_pin,
+        config.pin_code.clone(),
+        config.auto_extract_zip,
+        config.shared_folders.clone(),
+    );
+    server.start().await?;
+
+    if cli.tui {
+        ui::tui::run_tui(discovery, server).await?;
+    } else {
+        let mut initial_files = cli.files.clone();
+        for arg in std::env::args().skip(1) {
+            if !arg.starts_with('-') {
+                let path = std::path::PathBuf::from(&arg);
+                if path.exists() && !initial_files.contains(&path) {
+                    initial_files.push(path);
+                }
+            }
+        }
+
+        let start_minimized = (cli.tray || cli.minimized) && initial_files.is_empty();
+        let options = eframe::NativeOptions {
+            viewport: eframe::egui::ViewportBuilder::default()
+                .with_inner_size([config.window_width, config.window_height])
+                .with_min_inner_size([780.0, 500.0])
+                .with_visible(!start_minimized)
+                .with_title("ZeroSend v2.4.1 - P2P Sharing for ZeroTier & VPN"),
+            ..Default::default()
+        };
+
+        let disc_ref = &discovery;
+        let srv = server;
+        let in_req_rx = channels.incoming_request_rx;
+        let in_txt_rx = channels.incoming_text_rx;
+
+        eframe::run_native(
+            "ZeroSend",
+            options,
+            Box::new(move |cc| {
+                Ok(Box::new(ui::gui::ZeroSendApp::new(
+                    cc,
+                    disc_ref,
+                    srv,
+                    config,
+                    initial_files,
+                    in_req_rx,
+                    in_txt_rx,
+                )))
+            }),
+        )
+        .map_err(|e| format!("GUI Error: {}", e))?;
+    }
+
+    Ok(())
+}
diff --git a/src/network/discovery.rs b/src/network/discovery.rs
new file mode 100644
index 0000000..4405163
--- /dev/null
+++ b/src/network/discovery.rs
@@ -0,0 +1,304 @@
+use super::interfaces::InterfaceInfo;
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use socket2::{Domain, Protocol, Socket, Type};
+use std::collections::HashMap;
+use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
+use std::sync::Arc;
+use std::time::Duration;
+use tokio::net::UdpSocket;
+use tokio::sync::RwLock;
+use tracing::{debug, error, info, warn};
+
+pub const DEFAULT_DISCOVERY_PORT: u16 = 53317;
+#[allow(dead_code)]
+pub const DEFAULT_TRANSFER_PORT: u16 = 53318;
+pub const BEACON_INTERVAL_SECS: u64 = 3;
+pub const PEER_TIMEOUT_SECS: i64 = 8;
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct SharedFolderSummary {
+    pub id: String,
+    pub name: String,
+    pub read_only: bool,
+    pub requires_pin: bool,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DiscoveryBeacon {
+    pub peer_id: String,
+    pub name: String,
+    pub os: String,
+    pub ip: Ipv4Addr,
+    pub transfer_port: u16,
+    pub net_type: String,
+    pub version: String,
+    #[serde(default)]
+    pub shared_folders: Vec<SharedFolderSummary>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct PeerInfo {
+    pub peer_id: String,
+    pub name: String,
+    pub os: String,
+    pub ip: Ipv4Addr,
+    pub transfer_port: u16,
+    pub net_type: String,
+    pub version: String,
+    pub last_seen: DateTime<Utc>,
+    pub is_online: bool,
+    #[serde(default)]
+    pub ping_ms: Option<u64>,
+    #[serde(default)]
+    pub shared_folders: Vec<SharedFolderSummary>,
+}
+
+impl PeerInfo {
+    pub fn transfer_url(&self) -> String {
+        format!("http://{}:{}", self.ip, self.transfer_port)
+    }
+}
+
+pub struct DiscoveryService {
+    my_info: DiscoveryBeacon,
+    shared_folders: Arc<RwLock<Vec<SharedFolderSummary>>>,
+    selected_iface: InterfaceInfo,
+    peers: Arc<RwLock<HashMap<String, PeerInfo>>>,
+    shutdown_tx: Option<tokio::sync::broadcast::Sender<()>>,
+}
+
+impl DiscoveryService {
+    pub fn new(
+        peer_id: String,
+        name: String,
+        iface: InterfaceInfo,
+        transfer_port: u16,
+    ) -> Self {
+        let my_info = DiscoveryBeacon {
+            peer_id,
+            name,
+            os: std::env::consts::OS.to_string(),
+            ip: iface.ip,
+            transfer_port,
+            net_type: iface.net_type.as_str().to_string(),
+            version: env!("CARGO_PKG_VERSION").to_string(),
+            shared_folders: Vec::new(),
+        };
+
+        Self {
+            my_info,
+            shared_folders: Arc::new(RwLock::new(Vec::new())),
+            selected_iface: iface,
+            peers: Arc::new(RwLock::new(HashMap::new())),
+            shutdown_tx: None,
+        }
+    }
+
+    pub fn peers(&self) -> Arc<RwLock<HashMap<String, PeerInfo>>> {
+        self.peers.clone()
+    }
+
+    pub fn my_info(&self) -> &DiscoveryBeacon {
+        &self.my_info
+    }
+
+    pub fn selected_interface(&self) -> &InterfaceInfo {
+        &self.selected_iface
+    }
+
+    pub async fn update_shared_folders(&self, shares: Vec<SharedFolderSummary>) {
+        let mut sf = self.shared_folders.write().await;
+        *sf = shares;
+    }
+
+    /// Add or update a peer directly (useful for manual IP add / Tailscale / Ping)
+    #[allow(dead_code)]
+    pub async fn add_or_update_peer(&self, beacon: DiscoveryBeacon) {
+        if beacon.peer_id == self.my_info.peer_id {
+            return;
+        }
+
+        let mut peers = self.peers.write().await;
+        peers.insert(
+            beacon.peer_id.clone(),
+            PeerInfo {
+                peer_id: beacon.peer_id,
+                name: beacon.name,
+                os: beacon.os,
+                ip: beacon.ip,
+                transfer_port: beacon.transfer_port,
+                net_type: beacon.net_type,
+                version: beacon.version,
+                last_seen: Utc::now(),
+                is_online: true,
+                ping_ms: None,
+                shared_folders: beacon.shared_folders,
+            },
+        );
+    }
+
+    /// Start discovery beacon broadcaster and listener in background
+    pub async fn start(&mut self) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+        let (shutdown_tx, _) = tokio::sync::broadcast::channel::<()>(1);
+        self.shutdown_tx = Some(shutdown_tx.clone());
+
+        // 1. Create UDP broadcast sending socket
+        let broadcast_addr = SocketAddrV4::new(self.selected_iface.broadcast, DEFAULT_DISCOVERY_PORT);
+        let my_info_static = self.my_info.clone();
+        let shared_folders = self.shared_folders.clone();
+        let mut shutdown_rx1 = shutdown_tx.subscribe();
+
+        tokio::spawn(async move {
+            let socket = match UdpSocket::bind("0.0.0.0:0").await {
+                Ok(s) => s,
+                Err(e) => {
+                    error!("Failed to bind UDP beacon sender: {}", e);
+                    return;
+                }
+            };
+
+            if let Err(e) = socket.set_broadcast(true) {
+                warn!("Failed to set UDP broadcast flag: {}", e);
+            }
+
+            info!(
+                "Started discovery beacon on {} (broadcast: {})",
+                my_info_static.ip, broadcast_addr
+            );
+
+            let mut interval = tokio::time::interval(Duration::from_secs(BEACON_INTERVAL_SECS));
+            loop {
+                tokio::select! {
+                    _ = interval.tick() => {
+                        let mut current_beacon = my_info_static.clone();
+                        current_beacon.shared_folders = shared_folders.read().await.clone();
+                        if let Ok(data) = serde_json::to_vec(&current_beacon) {
+                            let _ = socket.send_to(&data, broadcast_addr).await;
+                        }
+                    }
+                    _ = shutdown_rx1.recv() => {
+                        debug!("Discovery broadcaster shutting down");
+                        break;
+                    }
+                }
+            }
+        });
+
+        // 2. Create UDP listener socket
+        let listener_socket = match create_udp_listener(DEFAULT_DISCOVERY_PORT) {
+            Ok(s) => s,
+            Err(e) => {
+                warn!(
+                    "Could not bind listener on port {}: {}. Will try random port.",
+                    DEFAULT_DISCOVERY_PORT, e
+                );
+                create_udp_listener(0)?
+            }
+        };
+
+        let my_peer_id = self.my_info.peer_id.clone();
+        let peers_store = self.peers.clone();
+        let mut shutdown_rx2 = shutdown_tx.subscribe();
+
+        tokio::spawn(async move {
+            let mut buf = [0u8; 4096];
+            info!("Discovery listener active");
+
+            loop {
+                tokio::select! {
+                    res = listener_socket.recv_from(&mut buf) => {
+                        match res {
+                            Ok((size, _sender_addr)) => {
+                                if let Ok(beacon) = serde_json::from_slice::<DiscoveryBeacon>(&buf[..size]) {
+                                    if beacon.peer_id != my_peer_id {
+                                        let mut peers = peers_store.write().await;
+                                        let old_ping = peers.get(&beacon.peer_id).and_then(|p| p.ping_ms);
+                                        // Deduplicate: Remove any stale entry on the same IP and port with a different peer_id
+                                        peers.retain(|id, p| {
+                                            !(p.ip == beacon.ip && p.transfer_port == beacon.transfer_port && id != &beacon.peer_id)
+                                        });
+
+                                        peers.insert(
+                                            beacon.peer_id.clone(),
+                                            PeerInfo {
+                                                peer_id: beacon.peer_id,
+                                                name: beacon.name,
+                                                os: beacon.os,
+                                                ip: beacon.ip,
+                                                transfer_port: beacon.transfer_port,
+                                                net_type: beacon.net_type,
+                                                version: beacon.version,
+                                                last_seen: Utc::now(),
+                                                is_online: true,
+                                                ping_ms: old_ping,
+                                                shared_folders: beacon.shared_folders,
+                                            },
+                                        );
+                                    }
+                                }
+                            }
+                            Err(e) => {
+                                warn!("UDP listener recv error: {}", e);
+                            }
+                        }
+                    }
+                    _ = shutdown_rx2.recv() => {
+                        debug!("Discovery listener shutting down");
+                        break;
+                    }
+                }
+            }
+        });
+
+        // 3. Housekeeping task to remove stale offline peers
+        let peers_store_cleaner = self.peers.clone();
+        let mut shutdown_rx3 = shutdown_tx.subscribe();
+
+        tokio::spawn(async move {
+            let mut interval = tokio::time::interval(Duration::from_secs(3));
+            loop {
+                tokio::select! {
+                    _ = interval.tick() => {
+                        let now = Utc::now();
+                        let mut peers = peers_store_cleaner.write().await;
+                        peers.retain(|_, peer| {
+                            let diff = now.signed_duration_since(peer.last_seen).num_seconds();
+                            diff <= PEER_TIMEOUT_SECS
+                        });
+                    }
+                    _ = shutdown_rx3.recv() => {
+                        break;
+                    }
+                }
+            }
+        });
+
+        Ok(())
+    }
+
+    #[allow(dead_code)]
+    pub fn stop(&self) {
+        if let Some(tx) = &self.shutdown_tx {
+            let _ = tx.send(());
+        }
+    }
+}
+
+/// Helper to create a reusable broadcast socket on Windows / Linux / macOS
+fn create_udp_listener(port: u16) -> std::io::Result<UdpSocket> {
+    let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(Protocol::UDP))?;
+    socket.set_reuse_address(true)?;
+
+    #[cfg(not(windows))]
+    socket.set_reuse_port(true)?;
+
+    socket.set_broadcast(true)?;
+    socket.set_nonblocking(true)?;
+
+    let bind_addr: SocketAddr = format!("0.0.0.0:{}", port).parse().unwrap();
+    socket.bind(&bind_addr.into())?;
+
+    let std_socket: std::net::UdpSocket = socket.into();
+    UdpSocket::from_std(std_socket)
+}
diff --git a/src/network/interfaces.rs b/src/network/interfaces.rs
new file mode 100644
index 0000000..6a645dd
--- /dev/null
+++ b/src/network/interfaces.rs
@@ -0,0 +1,163 @@
+use network_interface::{NetworkInterface, NetworkInterfaceConfig};
+use std::net::{IpAddr, Ipv4Addr};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum NetworkType {
+    ZeroTier,
+    Tailscale,
+    Radmin,
+    LAN,
+    Loopback,
+    Unknown,
+}
+
+impl NetworkType {
+    pub fn as_str(&self) -> &'static str {
+        match self {
+            NetworkType::ZeroTier => "ZeroTier",
+            NetworkType::Tailscale => "Tailscale",
+            NetworkType::Radmin => "Radmin VPN",
+            NetworkType::LAN => "LAN / Wi-Fi",
+            NetworkType::Loopback => "Loopback",
+            NetworkType::Unknown => "Unknown",
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn badge(&self) -> &'static str {
+        match self {
+            NetworkType::ZeroTier => "[ZeroTier]",
+            NetworkType::Tailscale => "[Tailscale]",
+            NetworkType::Radmin => "[Radmin]",
+            NetworkType::LAN => "[LAN]",
+            NetworkType::Loopback => "[Local]",
+            NetworkType::Unknown => "[Other]",
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct InterfaceInfo {
+    pub name: String,
+    pub ip: Ipv4Addr,
+    #[allow(dead_code)]
+    pub netmask: Option<Ipv4Addr>,
+    pub broadcast: Ipv4Addr,
+    pub net_type: NetworkType,
+}
+
+impl InterfaceInfo {
+    #[allow(dead_code)]
+    pub fn is_virtual_vpn(&self) -> bool {
+        matches!(
+            self.net_type,
+            NetworkType::ZeroTier | NetworkType::Tailscale | NetworkType::Radmin
+        )
+    }
+}
+
+/// Classify network interface based on name and IP address ranges
+pub fn classify_interface(name: &str, ip: Ipv4Addr) -> NetworkType {
+    let name_lower = name.to_lowercase();
+    let octets = ip.octets();
+
+    // 1. Check by interface name
+    if name_lower.contains("zerotier") || name_lower.contains("zt") {
+        return NetworkType::ZeroTier;
+    }
+    if name_lower.contains("tailscale") {
+        return NetworkType::Tailscale;
+    }
+    if name_lower.contains("radmin") || name_lower.contains("fametech") {
+        return NetworkType::Radmin;
+    }
+
+    // 2. Check by specific IP allocation ranges
+    // Tailscale uses CGNAT range 100.64.0.0/10 (100.64.0.0 - 100.127.255.255)
+    if octets[0] == 100 && (octets[1] >= 64 && octets[1] <= 127) {
+        return NetworkType::Tailscale;
+    }
+
+    // Radmin VPN typically assigns 26.x.x.x
+    if octets[0] == 26 {
+        return NetworkType::Radmin;
+    }
+
+    // ZeroTier commonly assigns 10.147.x.x, 10.244.x.x, 172.22-31.x.x, or 192.168.19x.x
+    if octets[0] == 10 && (octets[1] == 147 || octets[1] == 244) {
+        return NetworkType::ZeroTier;
+    }
+
+    // Loopback
+    if ip.is_loopback() {
+        return NetworkType::Loopback;
+    }
+
+    // Standard private IPv4 ranges (LAN / Wi-Fi)
+    if ip.is_private() {
+        return NetworkType::LAN;
+    }
+
+    NetworkType::Unknown
+}
+
+/// Compute broadcast address from IP and netmask
+pub fn compute_broadcast(ip: Ipv4Addr, netmask: Option<Ipv4Addr>) -> Ipv4Addr {
+    let mask = netmask.unwrap_or(Ipv4Addr::new(255, 255, 255, 0));
+    let ip_u32 = u32::from(ip);
+    let mask_u32 = u32::from(mask);
+    let broadcast_u32 = ip_u32 | (!mask_u32);
+    Ipv4Addr::from(broadcast_u32)
+}
+
+/// Get all usable IPv4 interfaces sorted with ZeroTier and VPNs having highest priority
+pub fn get_available_interfaces() -> Vec<InterfaceInfo> {
+    let mut results = Vec::new();
+
+    if let Ok(interfaces) = NetworkInterface::show() {
+        for iface in interfaces {
+            for addr in iface.addr {
+                if let IpAddr::V4(ipv4) = addr.ip() {
+                    // Skip 127.0.0.1 unless no other interface is found
+                    if ipv4.is_loopback() {
+                        continue;
+                    }
+
+                    let netmask_v4 = addr.netmask().and_then(|m| match m {
+                        IpAddr::V4(m_v4) => Some(m_v4),
+                        _ => None,
+                    });
+
+                    let net_type = classify_interface(&iface.name, ipv4);
+                    let broadcast = compute_broadcast(ipv4, netmask_v4);
+
+                    results.push(InterfaceInfo {
+                        name: iface.name.clone(),
+                        ip: ipv4,
+                        netmask: netmask_v4,
+                        broadcast,
+                        net_type,
+                    });
+                }
+            }
+        }
+    }
+
+    // Sort by priority: ZeroTier (0) > Radmin (1) > Tailscale (2) > LAN (3) > Other (4)
+    results.sort_by_key(|info| match info.net_type {
+        NetworkType::ZeroTier => 0,
+        NetworkType::Radmin => 1,
+        NetworkType::Tailscale => 2,
+        NetworkType::LAN => 3,
+        NetworkType::Loopback => 4,
+        NetworkType::Unknown => 5,
+    });
+
+    results
+}
+
+/// Pick best default interface (ZeroTier first, then others)
+pub fn get_preferred_interface() -> Option<InterfaceInfo> {
+    let list = get_available_interfaces();
+    list.into_iter().next()
+}
diff --git a/src/network/mod.rs b/src/network/mod.rs
new file mode 100644
index 0000000..c8f02ee
--- /dev/null
+++ b/src/network/mod.rs
@@ -0,0 +1,5 @@
+pub mod discovery;
+pub mod interfaces;
+
+pub use discovery::*;
+pub use interfaces::*;
diff --git a/src/registry.rs b/src/registry.rs
new file mode 100644
index 0000000..12d302c
--- /dev/null
+++ b/src/registry.rs
@@ -0,0 +1,73 @@
+#[cfg(windows)]
+use winreg::enums::*;
+#[cfg(windows)]
+use winreg::RegKey;
+
+/// Check if ZeroSend is registered in Windows Startup (HKCU\...\Run)
+pub fn is_autostart_registered() -> bool {
+    #[cfg(windows)]
+    {
+        let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+        if let Ok(key) = hkcu.open_subkey(r"Software\Microsoft\Windows\CurrentVersion\Run") {
+            if let Ok(_val) = key.get_value::<String, _>("ZeroSend") {
+                return true;
+            }
+        }
+    }
+    false
+}
+
+/// Register ZeroSend in Windows Startup (starts minimized to tray)
+pub fn register_autostart() -> Result<(), String> {
+    #[cfg(windows)]
+    {
+        let exe_path = std::env::current_exe()
+            .map_err(|e| format!("Failed to get executable path: {}", e))?;
+        let cmd_str = format!("\"{}\" --tray", exe_path.to_string_lossy());
+
+        let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+        let (key, _) = hkcu
+            .create_subkey(r"Software\Microsoft\Windows\CurrentVersion\Run")
+            .map_err(|e| format!("Registry error: {}", e))?;
+        key.set_value("ZeroSend", &cmd_str)
+            .map_err(|e| format!("Registry error: {}", e))?;
+        return Ok(());
+    }
+
+    #[cfg(not(windows))]
+    Err("Autostart is only supported on Windows".to_string())
+}
+
+/// Unregister ZeroSend from Windows Startup
+pub fn unregister_autostart() -> Result<(), String> {
+    #[cfg(windows)]
+    {
+        let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+        if let Ok(key) = hkcu.open_subkey_with_flags(
+            r"Software\Microsoft\Windows\CurrentVersion\Run",
+            KEY_SET_VALUE,
+        ) {
+            let _ = key.delete_value("ZeroSend");
+        }
+        return Ok(());
+    }
+
+    #[cfg(not(windows))]
+    Err("Autostart is only supported on Windows".to_string())
+}
+
+/// Check if Windows system theme is set to Dark Mode (AppsUseLightTheme == 0)
+pub fn is_system_dark_mode() -> bool {
+    #[cfg(windows)]
+    {
+        let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+        if let Ok(key) = hkcu.open_subkey(r"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize") {
+            if let Ok(val) = key.get_value::<u32, _>("AppsUseLightTheme") {
+                return val == 0;
+            }
+        }
+    }
+    true // default to dark
+}
+
+
diff --git a/src/transfer/archive.rs b/src/transfer/archive.rs
new file mode 100644
index 0000000..ba24601
--- /dev/null
+++ b/src/transfer/archive.rs
@@ -0,0 +1,99 @@
+use std::fs::File;
+use std::io::{Read, Write};
+use std::path::{Path, PathBuf};
+use tracing::{error, info};
+use walkdir::WalkDir;
+use zip::write::SimpleFileOptions;
+use zip::{CompressionMethod, ZipArchive, ZipWriter};
+
+/// Compress a whole folder into a ZIP archive with fast Deflate compression
+pub fn compress_folder_to_zip(
+    src_dir: &Path,
+    zip_dest: &Path,
+) -> Result<u64, Box<dyn std::error::Error + Send + Sync>> {
+    info!("Compressing folder {:?} -> {:?}", src_dir, zip_dest);
+    let file = File::create(zip_dest)?;
+    let mut zip = ZipWriter::new(file);
+    let options = SimpleFileOptions::default()
+        .compression_method(CompressionMethod::Deflated)
+        .compression_level(Some(3));
+
+    let parent = src_dir.parent().unwrap_or(src_dir);
+    let mut buffer = Vec::with_capacity(64 * 1024);
+
+    for entry in WalkDir::new(src_dir).into_iter().filter_map(|e| e.ok()) {
+        let path = entry.path();
+        let rel_path = path.strip_prefix(parent).unwrap_or(path);
+        let rel_path_str = rel_path.to_string_lossy().replace('\\', "/");
+
+        if rel_path_str.is_empty() {
+            continue;
+        }
+
+        if path.is_dir() {
+            let dir_name = if rel_path_str.ends_with('/') {
+                rel_path_str
+            } else {
+                format!("{}/", rel_path_str)
+            };
+            zip.add_directory(dir_name, options)?;
+        } else if path.is_file() {
+            zip.start_file(rel_path_str, options)?;
+            let mut f = File::open(path)?;
+            buffer.clear();
+            f.read_to_end(&mut buffer)?;
+            zip.write_all(&buffer)?;
+        }
+    }
+
+    zip.finish()?;
+    let total_size = std::fs::metadata(zip_dest)?.len();
+    info!("Compression completed. Zip size: {} bytes", total_size);
+    Ok(total_size)
+}
+
+/// Extract a received ZIP archive safely into the destination folder
+pub fn extract_zip_archive(
+    zip_path: &Path,
+    dest_dir: &Path,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    info!("Extracting ZIP archive {:?} into {:?}", zip_path, dest_dir);
+    let file = File::open(zip_path)?;
+    let mut archive = ZipArchive::new(file)?;
+
+    for i in 0..archive.len() {
+        let mut file = archive.by_index(i)?;
+        let raw_name = file.name().replace('\\', "/");
+
+        // Prevent Zip Slip / path traversal outside destination
+        let safe_rel_path: PathBuf = raw_name
+            .split('/')
+            .filter(|part| !part.is_empty() && *part != ".." && *part != ".")
+            .collect();
+
+        if safe_rel_path.as_os_str().is_empty() {
+            continue;
+        }
+
+        let outpath = dest_dir.join(&safe_rel_path);
+
+        if file.is_dir() {
+            let _ = std::fs::create_dir_all(&outpath);
+        } else {
+            if let Some(p) = outpath.parent() {
+                let _ = std::fs::create_dir_all(p);
+            }
+            match File::create(&outpath) {
+                Ok(mut outfile) => {
+                    let _ = std::io::copy(&mut file, &mut outfile);
+                }
+                Err(e) => {
+                    error!("Failed to extract file {:?}: {}", outpath, e);
+                }
+            }
+        }
+    }
+
+    info!("Extraction completed successfully for {:?}", zip_path);
+    Ok(())
+}
diff --git a/src/transfer/client.rs b/src/transfer/client.rs
new file mode 100644
index 0000000..069a603
--- /dev/null
+++ b/src/transfer/client.rs
@@ -0,0 +1,766 @@
+use super::archive::compress_folder_to_zip;
+use super::protocol::{
+    FileMetadata, PrepareTransferRequest, PrepareTransferResponse, SharedFolderInfo,
+    SharedFolderTreeResponse, SharedUploadResponse, TextMessage, TransferProgress, TransferState,
+};
+use super::rate_limiter::RateLimiter;
+use super::text_analyzer::{analyze_text, AnalyzedText};
+use crate::network::DiscoveryBeacon;
+use reqwest::Client;
+use sha2::{Digest, Sha256};
+use std::collections::VecDeque;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::{Duration, Instant};
+use tokio::fs::File;
+use tokio::io::{AsyncReadExt, AsyncSeekExt};
+use tokio::sync::Mutex;
+use tracing::info;
+use uuid::Uuid;
+use walkdir::WalkDir;
+
+pub fn compute_file_sha256(path: &std::path::Path) -> Result<String, std::io::Error> {
+    let mut file = std::fs::File::open(path)?;
+    let mut hasher = Sha256::new();
+    let mut buffer = [0u8; 64 * 1024];
+    loop {
+        let n = std::io::Read::read(&mut file, &mut buffer)?;
+        if n == 0 {
+            break;
+        }
+        hasher.update(&buffer[..n]);
+    }
+    Ok(hex::encode(hasher.finalize()))
+}
+
+const NUM_PARALLEL_STREAMS: usize = 4; // 4 concurrent HTTP/TCP streams
+
+fn calculate_adaptive_chunk_size(file_size: u64) -> usize {
+    if file_size < 5 * 1024 * 1024 {
+        512 * 1024 // 512 KB for small files < 5 MB
+    } else if file_size < 50 * 1024 * 1024 {
+        2 * 1024 * 1024 // 2 MB for medium files 5-50 MB
+    } else if file_size < 500 * 1024 * 1024 {
+        4 * 1024 * 1024 // 4 MB for large files 50-500 MB
+    } else {
+        8 * 1024 * 1024 // 8 MB for huge files >= 500 MB
+    }
+}
+
+#[derive(Clone)]
+struct ChunkTask {
+    file_path: PathBuf,
+    rel_path: String,
+    offset: u64,
+    length: usize,
+    retries: usize,
+}
+
+pub struct TransferClient {
+    client: Client,
+}
+
+impl TransferClient {
+    pub fn new() -> Self {
+        let client = Client::builder()
+            .timeout(Duration::from_secs(7200))
+            .connect_timeout(Duration::from_secs(6))
+            .tcp_nodelay(true)
+            .build()
+            .unwrap_or_default();
+
+        Self { client }
+    }
+
+    /// Ping a remote peer to check health and get beacon info
+    pub async fn ping_peer(&self, ip: &str, port: u16) -> Result<DiscoveryBeacon, String> {
+        let url = format!("http://{}:{}/api/info", ip, port);
+        let resp = self
+            .client
+            .get(&url)
+            .send()
+            .await
+            .map_err(|e| format!("Failed to connect to {}: {}", url, e))?;
+
+        if !resp.status().is_success() {
+            return Err(format!("Peer returned status: {}", resp.status()));
+        }
+
+        let beacon = resp
+            .json::<DiscoveryBeacon>()
+            .await
+            .map_err(|e| format!("Failed to parse response: {}", e))?;
+
+        Ok(beacon)
+    }
+
+    /// Measure real-time round-trip latency in milliseconds
+    pub async fn measure_ping(&self, ip: &str, port: u16) -> Option<u64> {
+        let start = Instant::now();
+        if self.ping_peer(ip, port).await.is_ok() {
+            Some(start.elapsed().as_millis() as u64)
+        } else {
+            None
+        }
+    }
+
+    /// Send quick text / clipboard content to a peer
+    pub async fn send_text(
+        &self,
+        peer_url: &str,
+        my_info: &DiscoveryBeacon,
+        text: &str,
+        pin: Option<String>,
+    ) -> Result<AnalyzedText, String> {
+        let analyzed = analyze_text(text);
+        let msg = TextMessage {
+            message_id: Uuid::new_v4().to_string(),
+            sender_id: my_info.peer_id.clone(),
+            sender_name: my_info.name.clone(),
+            sender_os: my_info.os.clone(),
+            content: analyzed.content.clone(),
+            content_type: analyzed.content_type.clone(),
+            pin,
+        };
+
+        let url = format!("{}/api/transfer/text", peer_url);
+        let resp = self
+            .client
+            .post(&url)
+            .json(&msg)
+            .send()
+            .await
+            .map_err(|e| format!("Failed to contact {}: {}", url, e))?;
+
+        if !resp.status().is_success() {
+            if resp.status() == reqwest::StatusCode::FORBIDDEN {
+                return Err("Recipient rejected text (Incorrect or missing PIN code)".to_string());
+            }
+            return Err(format!("Server returned status: {}", resp.status()));
+        }
+
+        Ok(analyzed)
+    }
+
+    /// Send files/folders with 4-Stream Parallel Chunking, Adaptive Chunk Sizing, and Auto-Retry Fault Tolerance
+    pub async fn send_files<F>(
+        &self,
+        peer_url: &str,
+        peer_display_name: &str,
+        my_info: &DiscoveryBeacon,
+        paths: &[PathBuf],
+        auto_zip_folders: bool,
+        max_upload_speed_mbps: u32,
+        pin: Option<String>,
+        mut on_progress: F,
+    ) -> Result<(), String>
+    where
+        F: FnMut(TransferProgress) + Send + 'static,
+    {
+        let mut file_entries: Vec<(PathBuf, String, u64)> = Vec::new();
+        let mut total_bytes = 0u64;
+        let temp_dir = std::env::temp_dir().join("ZeroSend_Zip");
+        let _ = std::fs::create_dir_all(&temp_dir);
+
+        for p in paths {
+            if !p.exists() {
+                return Err(format!("Path does not exist: {:?}", p));
+            }
+
+            if p.is_dir() {
+                if auto_zip_folders {
+                    let folder_name = p
+                        .file_name()
+                        .map(|n| n.to_string_lossy().into_owned())
+                        .unwrap_or_else(|| "folder".to_string());
+
+                    let zip_filename = format!("{}.zip", folder_name);
+                    let temp_zip_path = temp_dir.join(&zip_filename);
+
+                    // Notify UI that folder is being compressed into ZIP archive
+                    on_progress(TransferProgress {
+                        session_id: Uuid::new_v4().to_string(),
+                        peer_name: peer_display_name.to_string(),
+                        is_incoming: false,
+                        current_file_index: 0,
+                        total_files: paths.len(),
+                        current_file_name: format!("📦 Compressing folder '{}' into ZIP...", folder_name),
+                        bytes_transferred: 0,
+                        total_bytes: 0,
+                        speed_bps: 0,
+                        state: TransferState::InProgress,
+                        checksum_verified: false,
+                    });
+
+                    let p_clone = p.clone();
+                    let temp_zip_clone = temp_zip_path.clone();
+                    let zip_size = tokio::task::spawn_blocking(move || {
+                        compress_folder_to_zip(&p_clone, &temp_zip_clone)
+                    })
+                    .await
+                    .map_err(|e| format!("Compression task error: {}", e))?
+                    .map_err(|e| format!("Failed to compress folder {:?}: {}", p, e))?;
+
+                    total_bytes += zip_size;
+                    file_entries.push((temp_zip_path, zip_filename, zip_size));
+                } else {
+                    let base_parent = p.parent().unwrap_or(p);
+                    for entry in WalkDir::new(p).into_iter().filter_map(|e| e.ok()) {
+                        let entry_path = entry.path();
+                        if entry_path.is_file() {
+                            let rel_path = entry_path
+                                .strip_prefix(base_parent)
+                                .unwrap_or(entry_path)
+                                .to_string_lossy()
+                                .replace('\\', "/");
+
+                            let size = entry.metadata().map(|m| m.len()).unwrap_or(0);
+                            total_bytes += size;
+                            file_entries.push((entry_path.to_path_buf(), rel_path, size));
+                        }
+                    }
+                }
+            } else {
+                let file_name = p
+                    .file_name()
+                    .map(|f| f.to_string_lossy().into_owned())
+                    .unwrap_or_else(|| "unnamed".to_string());
+
+                let size = tokio::fs::metadata(p)
+                    .await
+                    .map(|m| m.len())
+                    .unwrap_or(0);
+
+                total_bytes += size;
+                file_entries.push((p.clone(), file_name, size));
+            }
+        }
+
+        if file_entries.is_empty() {
+            return Err("No files selected for transfer".to_string());
+        }
+
+        let file_metas: Vec<FileMetadata> = file_entries
+            .iter()
+            .map(|(path, rel_path, size)| {
+                let sha256 = compute_file_sha256(path).ok();
+                FileMetadata {
+                    id: Uuid::new_v4().to_string(),
+                    name: rel_path.clone(),
+                    relative_path: rel_path.clone(),
+                    size: *size,
+                    is_dir: false,
+                    sha256,
+                }
+            })
+            .collect();
+
+        let session_id = Uuid::new_v4().to_string();
+
+        let prepare_req = PrepareTransferRequest {
+            session_id: session_id.clone(),
+            sender_id: my_info.peer_id.clone(),
+            sender_name: my_info.name.clone(),
+            sender_os: my_info.os.clone(),
+            files: file_metas.clone(),
+            total_size: total_bytes,
+            pin,
+        };
+
+        // Notify UI: Pending confirmation
+        on_progress(TransferProgress {
+            session_id: session_id.clone(),
+            peer_name: peer_display_name.to_string(),
+            is_incoming: false,
+            current_file_index: 0,
+            total_files: file_metas.len(),
+            current_file_name: file_metas.first().map(|f| f.name.clone()).unwrap_or_default(),
+            bytes_transferred: 0,
+            total_bytes,
+            speed_bps: 0,
+            state: TransferState::PendingConfirmation,
+            checksum_verified: false,
+        });
+
+        let prepare_url = format!("{}/api/transfer/prepare", peer_url);
+        let resp = self
+            .client
+            .post(&prepare_url)
+            .json(&prepare_req)
+            .send()
+            .await
+            .map_err(|e| format!("Failed to contact peer at {}: {}", prepare_url, e))?;
+
+        if !resp.status().is_success() {
+            let reason = if resp.status() == reqwest::StatusCode::FORBIDDEN {
+                format!("Transfer rejected by {} (Check PIN code or permissions)", peer_display_name)
+            } else {
+                format!("Peer responded with status {}", resp.status())
+            };
+
+            on_progress(TransferProgress {
+                session_id: session_id.clone(),
+                peer_name: peer_display_name.to_string(),
+                is_incoming: false,
+                current_file_index: 0,
+                total_files: file_metas.len(),
+                current_file_name: String::new(),
+                bytes_transferred: 0,
+                total_bytes,
+                speed_bps: 0,
+                state: TransferState::Rejected,
+                checksum_verified: false,
+            });
+
+            return Err(reason);
+        }
+
+        let prep_resp: PrepareTransferResponse = resp
+            .json()
+            .await
+            .map_err(|e| format!("Invalid prepare response: {}", e))?;
+
+        let (session_id, received_offsets) = match prep_resp {
+            PrepareTransferResponse::Accepted { session_id: accepted_id, received_offsets } => {
+                info!(
+                    "Transfer session {} accepted by {} with {} resumable offset(s)",
+                    accepted_id, peer_display_name, received_offsets.len()
+                );
+                (accepted_id, received_offsets)
+            }
+            PrepareTransferResponse::Rejected { reason } => {
+                return Err(format!("Rejected: {}", reason));
+            }
+        };
+
+        // Build queue of chunk tasks with dynamic adaptive chunk sizing
+        let mut chunk_tasks = VecDeque::new();
+        let mut already_transferred = 0u64;
+
+        for (file_path, rel_path, size) in &file_entries {
+            let start_offset = received_offsets.get(rel_path).copied().unwrap_or(0);
+            if start_offset > 0 && start_offset < *size {
+                already_transferred += start_offset;
+                info!("Resuming {} from byte {}", rel_path, start_offset);
+            }
+
+            let mut curr_offset = start_offset;
+            if curr_offset >= *size {
+                continue;
+            }
+
+            let chunk_size = calculate_adaptive_chunk_size(*size);
+
+            while curr_offset < *size {
+                let chunk_len = ((*size - curr_offset) as usize).min(chunk_size);
+                chunk_tasks.push_back(ChunkTask {
+                    file_path: file_path.clone(),
+                    rel_path: rel_path.clone(),
+                    offset: curr_offset,
+                    length: chunk_len,
+                    retries: 0,
+                });
+                curr_offset += chunk_len as u64;
+            }
+        }
+
+        let rate_limiter = RateLimiter::new((max_upload_speed_mbps as u64) * 1024 * 1024);
+        let tasks_mutex = Arc::new(Mutex::new(chunk_tasks));
+        let (chunk_tx, mut chunk_rx) = tokio::sync::mpsc::unbounded_channel::<(usize, String)>();
+        let (progress_update_tx, mut progress_update_rx) = tokio::sync::mpsc::unbounded_channel::<TransferProgress>();
+
+        let s_id = session_id.clone();
+        let p_name = peer_display_name.to_string();
+        let t_files = file_metas.len();
+        let p_tx = progress_update_tx.clone();
+
+        // Background progress tracker with smoothed EMA speed calculation
+        tokio::spawn(async move {
+            let mut total_sent = already_transferred;
+            let mut last_bytes = total_sent;
+            let mut last_time = Instant::now();
+            let mut smoothed_speed = 0.0f64;
+
+            while let Some((len, fname)) = chunk_rx.recv().await {
+                total_sent += len as u64;
+
+                if last_time.elapsed().as_millis() >= 350 {
+                    let elapsed_secs = last_time.elapsed().as_secs_f64();
+                    let delta = total_sent.saturating_sub(last_bytes);
+                    let instant_speed = if elapsed_secs > 0.0 {
+                        (delta as f64) / elapsed_secs
+                    } else {
+                        0.0
+                    };
+
+                    smoothed_speed = if smoothed_speed <= 0.0 {
+                        instant_speed
+                    } else {
+                        (smoothed_speed * 0.60) + (instant_speed * 0.40)
+                    };
+
+                    let speed_bps = smoothed_speed as u64;
+
+                    let _ = p_tx.send(TransferProgress {
+                        session_id: s_id.clone(),
+                        peer_name: p_name.clone(),
+                        is_incoming: false,
+                        current_file_index: 0,
+                        total_files: t_files,
+                        current_file_name: fname,
+                        bytes_transferred: total_sent,
+                        total_bytes,
+                        speed_bps,
+                        state: TransferState::InProgress,
+                        checksum_verified: false,
+                    });
+
+                    last_time = Instant::now();
+                    last_bytes = total_sent;
+                }
+            }
+        });
+
+        on_progress(TransferProgress {
+            session_id: session_id.clone(),
+            peer_name: peer_display_name.to_string(),
+            is_incoming: false,
+            current_file_index: 0,
+            total_files: file_metas.len(),
+            current_file_name: file_metas.first().map(|f| f.name.clone()).unwrap_or_default(),
+            bytes_transferred: already_transferred,
+            total_bytes,
+            speed_bps: 0,
+            state: TransferState::InProgress,
+            checksum_verified: false,
+        });
+
+        let start_time = Instant::now();
+        let mut worker_set = tokio::task::JoinSet::new();
+
+        // Spawn parallel HTTP chunk streaming worker pool with auto-retry resilience
+        for _ in 0..NUM_PARALLEL_STREAMS {
+            let tasks_c = tasks_mutex.clone();
+            let client_c = self.client.clone();
+            let chunk_url = format!("{}/api/transfer/chunk/{}", peer_url, session_id);
+            let limiter_c = rate_limiter.clone();
+            let tx_c = chunk_tx.clone();
+
+            worker_set.spawn(async move {
+                loop {
+                    let mut task = {
+                        let mut guard = tasks_c.lock().await;
+                        guard.pop_front()
+                    };
+
+                    let Some(mut chunk_task) = task.take() else {
+                        break;
+                    };
+
+                    let mut file = match File::open(&chunk_task.file_path).await {
+                        Ok(f) => f,
+                        Err(e) => return Err(format!("Failed to open file {:?}: {}", chunk_task.file_path, e)),
+                    };
+
+                    if let Err(e) = file.seek(std::io::SeekFrom::Start(chunk_task.offset)).await {
+                        return Err(format!("Failed to seek in {:?}: {}", chunk_task.file_path, e));
+                    }
+
+                    let mut buf = vec![0u8; chunk_task.length];
+                    if let Err(e) = file.read_exact(&mut buf).await {
+                        return Err(format!("Failed to read chunk from {:?}: {}", chunk_task.file_path, e));
+                    }
+
+                    limiter_c.throttle(buf.len()).await;
+
+                    let resp = client_c
+                        .post(&chunk_url)
+                        .header("x-file-name", &chunk_task.rel_path)
+                        .header("x-chunk-offset", chunk_task.offset.to_string())
+                        .header("x-chunk-length", chunk_task.length.to_string())
+                        .body(buf)
+                        .send()
+                        .await;
+
+                    let is_ok = match &resp {
+                        Ok(r) => r.status().is_success(),
+                        Err(_) => false,
+                    };
+
+                    if !is_ok {
+                        if chunk_task.retries < 3 {
+                            chunk_task.retries += 1;
+                            tokio::time::sleep(Duration::from_millis(250)).await;
+                            tasks_c.lock().await.push_back(chunk_task);
+                            continue;
+                        } else {
+                            let err_msg = match resp {
+                                Ok(r) => format!("Server returned error status {}", r.status()),
+                                Err(e) => format!("Network transfer error: {}", e),
+                            };
+                            return Err(err_msg);
+                        }
+                    }
+
+                    let _ = tx_c.send((chunk_task.length, chunk_task.rel_path));
+                }
+                Ok::<(), String>(())
+            });
+        }
+        drop(chunk_tx); // Drop main thread copy
+
+        // Wait for all workers while continuously forwarding progress updates to UI
+        while !worker_set.is_empty() {
+            tokio::select! {
+                res = worker_set.join_next() => {
+                    if let Some(join_result) = res {
+                        match join_result {
+                            Ok(Ok(())) => {}
+                            Ok(Err(e)) => {
+                                on_progress(TransferProgress {
+                                    session_id: session_id.clone(),
+                                    peer_name: peer_display_name.to_string(),
+                                    is_incoming: false,
+                                    current_file_index: 0,
+                                    total_files: file_metas.len(),
+                                    current_file_name: String::new(),
+                                    bytes_transferred: 0,
+                                    total_bytes,
+                                    speed_bps: 0,
+                                    state: TransferState::Failed(e.clone()),
+                                    checksum_verified: false,
+                                });
+                                return Err(e);
+                            }
+                            Err(join_err) => {
+                                return Err(format!("Worker thread panicked: {}", join_err));
+                            }
+                        }
+                    }
+                }
+                Some(progress) = progress_update_rx.recv() => {
+                    on_progress(progress);
+                }
+            }
+        }
+
+        // Drain remaining progress updates
+        while let Ok(progress) = progress_update_rx.try_recv() {
+            on_progress(progress);
+        }
+
+        // Finalize transfer on receiver (atomic rename + zip extraction)
+        let finish_url = format!("{}/api/transfer/finish/{}", peer_url, session_id);
+        let finish_resp = self.client.post(&finish_url).send().await;
+        if let Err(e) = finish_resp {
+            info!("Warning: Finalize call response: {}", e);
+        }
+
+        let elapsed = start_time.elapsed().as_secs_f64();
+        let actual_uploaded = total_bytes.saturating_sub(already_transferred);
+        let avg_speed = if elapsed > 0.0 {
+            (actual_uploaded as f64 / elapsed) as u64
+        } else {
+            0
+        };
+
+        on_progress(TransferProgress {
+            session_id,
+            peer_name: peer_display_name.to_string(),
+            is_incoming: false,
+            current_file_index: file_metas.len(),
+            total_files: file_metas.len(),
+            current_file_name: format!("{} file(s) delivered", file_metas.len()),
+            bytes_transferred: total_bytes,
+            total_bytes,
+            speed_bps: avg_speed,
+            state: TransferState::Completed,
+            checksum_verified: true,
+        });
+
+        Ok(())
+    }
+
+    /// Fetch list of shared folders from a remote peer
+    #[allow(dead_code)]
+    pub async fn fetch_shared_folders(
+        &self,
+        peer_url: &str,
+        pin: Option<&str>,
+    ) -> Result<Vec<SharedFolderInfo>, String> {
+        let mut url = format!("{}/api/shared/list", peer_url);
+        if let Some(p) = pin.filter(|p| !p.trim().is_empty()) {
+            url = format!("{}?pin={}", url, p);
+        }
+
+        let resp = self
+            .client
+            .get(&url)
+            .send()
+            .await
+            .map_err(|e| format!("Network error: {}", e))?;
+
+        if !resp.status().is_success() {
+            return Err(format!("Server returned HTTP {}", resp.status()));
+        }
+
+        resp.json::<Vec<SharedFolderInfo>>()
+            .await
+            .map_err(|e| format!("Failed to parse shared folders: {}", e))
+    }
+
+    /// Fetch file/folder tree of a shared folder
+    pub async fn fetch_shared_tree(
+        &self,
+        peer_url: &str,
+        folder_id: &str,
+        subpath: Option<&str>,
+        pin: Option<&str>,
+    ) -> Result<SharedFolderTreeResponse, String> {
+        let url = format!("{}/api/shared/tree/{}", peer_url, folder_id);
+        let mut req = self.client.get(&url);
+        if let Some(p) = subpath.filter(|s| !s.trim().is_empty()) {
+            req = req.query(&[("path", p)]);
+        }
+        if let Some(p) = pin.filter(|p| !p.trim().is_empty()) {
+            req = req.query(&[("pin", p)]);
+        }
+
+        let resp = req
+            .send()
+            .await
+            .map_err(|e| format!("Network error: {}", e))?;
+
+        if !resp.status().is_success() {
+            return Err(format!("Server returned HTTP {}", resp.status()));
+        }
+
+        resp.json::<SharedFolderTreeResponse>()
+            .await
+            .map_err(|e| format!("Failed to parse folder tree: {}", e))
+    }
+
+    /// Fetch raw text of a file (used for Vim Code Viewer)
+    pub async fn fetch_shared_file_text(
+        &self,
+        peer_url: &str,
+        folder_id: &str,
+        subpath: &str,
+        pin: Option<&str>,
+    ) -> Result<String, String> {
+        let clean = subpath.trim_start_matches('/').trim_start_matches('\\');
+        let mut url = format!("{}/api/shared/stream/{}/{}", peer_url, folder_id, clean);
+        if let Some(p) = pin.filter(|p| !p.trim().is_empty()) {
+            url = format!("{}?pin={}", url, p);
+        }
+
+        let resp = self
+            .client
+            .get(&url)
+            .send()
+            .await
+            .map_err(|e| format!("Network error: {}", e))?;
+
+        if !resp.status().is_success() {
+            return Err(format!("Server returned HTTP {}", resp.status()));
+        }
+
+        resp.text()
+            .await
+            .map_err(|e| format!("Failed to read file text: {}", e))
+    }
+
+    /// Download a file or folder (zip) from a remote shared folder
+    pub async fn download_shared_file(
+        &self,
+        peer_url: &str,
+        folder_id: &str,
+        subpath: &str,
+        dest_path: &std::path::Path,
+        pin: Option<&str>,
+    ) -> Result<u64, String> {
+        let clean = subpath.trim_start_matches('/').trim_start_matches('\\');
+        let mut url = format!("{}/api/shared/download/{}/{}", peer_url, folder_id, clean);
+        if let Some(p) = pin.filter(|p| !p.trim().is_empty()) {
+            url = format!("{}?pin={}", url, p);
+        }
+
+        let resp = self
+            .client
+            .get(&url)
+            .send()
+            .await
+            .map_err(|e| format!("Network error: {}", e))?;
+
+        if !resp.status().is_success() {
+            return Err(format!("Download failed: HTTP {}", resp.status()));
+        }
+
+        let bytes = resp
+            .bytes()
+            .await
+            .map_err(|e| format!("Failed to read stream: {}", e))?;
+        let len = bytes.len() as u64;
+
+        if let Some(parent) = dest_path.parent() {
+            let _ = tokio::fs::create_dir_all(parent).await;
+        }
+
+        let mut file = tokio::fs::File::create(dest_path)
+            .await
+            .map_err(|e| format!("Could not create file: {}", e))?;
+
+        tokio::io::AsyncWriteExt::write_all(&mut file, &bytes)
+            .await
+            .map_err(|e| format!("Could not write file: {}", e))?;
+        tokio::io::AsyncWriteExt::flush(&mut file)
+            .await
+            .map_err(|e| format!("Could not flush file: {}", e))?;
+
+        Ok(len)
+    }
+
+    /// Upload a file directly to a friend's shared folder (if Read & Write allowed)
+    pub async fn upload_to_shared_folder(
+        &self,
+        peer_url: &str,
+        folder_id: &str,
+        subpath: &str,
+        file_path: &std::path::Path,
+        pin: Option<&str>,
+    ) -> Result<SharedUploadResponse, String> {
+        let clean = subpath.trim_start_matches('/').trim_start_matches('\\');
+        let mut url = format!("{}/api/shared/upload/{}/{}", peer_url, folder_id, clean);
+        if let Some(p) = pin.filter(|p| !p.trim().is_empty()) {
+            url = format!("{}?pin={}", url, p);
+        }
+
+        let file_name = file_path
+            .file_name()
+            .map(|f| f.to_string_lossy().into_owned())
+            .unwrap_or_else(|| "file".to_string());
+
+        let file_bytes = tokio::fs::read(file_path)
+            .await
+            .map_err(|e| format!("Could not read local file: {}", e))?;
+
+        let part = reqwest::multipart::Part::bytes(file_bytes).file_name(file_name);
+        let form = reqwest::multipart::Form::new().part("file", part);
+
+        let resp = self
+            .client
+            .post(&url)
+            .multipart(form)
+            .send()
+            .await
+            .map_err(|e| format!("Upload error: {}", e))?;
+
+        if !resp.status().is_success() {
+            return Err(format!("Upload failed: HTTP {}", resp.status()));
+        }
+
+        resp.json::<SharedUploadResponse>()
+            .await
+            .map_err(|e| format!("Failed to parse upload response: {}", e))
+    }
+}
diff --git a/src/transfer/mod.rs b/src/transfer/mod.rs
new file mode 100644
index 0000000..647d36c
--- /dev/null
+++ b/src/transfer/mod.rs
@@ -0,0 +1,13 @@
+pub mod archive;
+pub mod client;
+pub mod protocol;
+pub mod rate_limiter;
+pub mod server;
+pub mod text_analyzer;
+
+pub use client::*;
+pub use protocol::*;
+#[allow(unused_imports)]
+pub use rate_limiter::RateLimiter;
+pub use server::*;
+pub use text_analyzer::*;
diff --git a/src/transfer/protocol.rs b/src/transfer/protocol.rs
new file mode 100644
index 0000000..3aa93b9
--- /dev/null
+++ b/src/transfer/protocol.rs
@@ -0,0 +1,189 @@
+use super::text_analyzer::ContentType;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FileMetadata {
+    pub id: String,
+    pub name: String,
+    pub relative_path: String,
+    pub size: u64,
+    pub is_dir: bool,
+    pub sha256: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PrepareTransferRequest {
+    pub session_id: String,
+    pub sender_id: String,
+    pub sender_name: String,
+    pub sender_os: String,
+    pub files: Vec<FileMetadata>,
+    pub total_size: u64,
+    pub pin: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TextMessage {
+    pub message_id: String,
+    pub sender_id: String,
+    pub sender_name: String,
+    pub sender_os: String,
+    pub content: String,
+    pub content_type: ContentType,
+    pub pin: Option<String>,
+}
+
+use std::collections::HashMap;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum PrepareTransferResponse {
+    Accepted {
+        session_id: String,
+        #[serde(default)]
+        received_offsets: HashMap<String, u64>,
+    },
+    Rejected {
+        reason: String,
+    },
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub enum TransferState {
+    PendingConfirmation,
+    InProgress,
+    Completed,
+    Failed(String),
+    Rejected,
+    Canceled,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TransferProgress {
+    pub session_id: String,
+    pub peer_name: String,
+    pub is_incoming: bool,
+    pub current_file_index: usize,
+    pub total_files: usize,
+    pub current_file_name: String,
+    pub bytes_transferred: u64,
+    pub total_bytes: u64,
+    pub speed_bps: u64,
+    pub state: TransferState,
+    #[serde(default)]
+    pub checksum_verified: bool,
+}
+
+impl TransferProgress {
+    pub fn percentage(&self) -> f64 {
+        if self.total_bytes == 0 {
+            100.0
+        } else {
+            (self.bytes_transferred as f64 / self.total_bytes as f64) * 100.0
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SharedFileEntry {
+    pub name: String,
+    pub relative_path: String,
+    pub size: u64,
+    pub is_dir: bool,
+    pub modified_secs: u64,
+    pub mime_type: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SharedFolderInfo {
+    pub id: String,
+    pub name: String,
+    pub read_only: bool,
+    pub requires_pin: bool,
+    pub total_files: usize,
+    pub total_bytes: u64,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SharedFolderTreeResponse {
+    pub folder_id: String,
+    pub folder_name: String,
+    pub current_path: String,
+    pub read_only: bool,
+    pub entries: Vec<SharedFileEntry>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SharedUploadResponse {
+    pub status: String,
+    pub filename: String,
+    pub bytes_written: u64,
+}
+
+pub fn get_mime_type(filename: &str) -> &'static str {
+    let lower = filename.to_lowercase();
+    if lower.ends_with(".mp4") {
+        "video/mp4"
+    } else if lower.ends_with(".mkv") {
+        "video/x-matroska"
+    } else if lower.ends_with(".webm") {
+        "video/webm"
+    } else if lower.ends_with(".mov") {
+        "video/quicktime"
+    } else if lower.ends_with(".avi") {
+        "video/x-msvideo"
+    } else if lower.ends_with(".mp3") {
+        "audio/mpeg"
+    } else if lower.ends_with(".wav") {
+        "audio/wav"
+    } else if lower.ends_with(".flac") {
+        "audio/flac"
+    } else if lower.ends_with(".ogg") {
+        "audio/ogg"
+    } else if lower.ends_with(".m4a") || lower.ends_with(".aac") {
+        "audio/mp4"
+    } else if lower.ends_with(".png") {
+        "image/png"
+    } else if lower.ends_with(".jpg") || lower.ends_with(".jpeg") {
+        "image/jpeg"
+    } else if lower.ends_with(".gif") {
+        "image/gif"
+    } else if lower.ends_with(".webp") {
+        "image/webp"
+    } else if lower.ends_with(".svg") {
+        "image/svg+xml"
+    } else if lower.ends_with(".pdf") {
+        "application/pdf"
+    } else if lower.ends_with(".zip") {
+        "application/zip"
+    } else if lower.ends_with(".rs")
+        || lower.ends_with(".py")
+        || lower.ends_with(".js")
+        || lower.ends_with(".ts")
+        || lower.ends_with(".jsx")
+        || lower.ends_with(".tsx")
+        || lower.ends_with(".html")
+        || lower.ends_with(".css")
+        || lower.ends_with(".json")
+        || lower.ends_with(".toml")
+        || lower.ends_with(".yaml")
+        || lower.ends_with(".yml")
+        || lower.ends_with(".c")
+        || lower.ends_with(".cpp")
+        || lower.ends_with(".h")
+        || lower.ends_with(".hpp")
+        || lower.ends_with(".sh")
+        || lower.ends_with(".bat")
+        || lower.ends_with(".cmd")
+        || lower.ends_with(".ps1")
+        || lower.ends_with(".txt")
+        || lower.ends_with(".md")
+        || lower.ends_with(".go")
+        || lower.ends_with(".java")
+        || lower.ends_with(".xml")
+        || lower.ends_with(".sql")
+    {
+        "text/plain; charset=utf-8"
+    } else {
+        "application/octet-stream"
+    }
+}
diff --git a/src/transfer/rate_limiter.rs b/src/transfer/rate_limiter.rs
new file mode 100644
index 0000000..7325826
--- /dev/null
+++ b/src/transfer/rate_limiter.rs
@@ -0,0 +1,58 @@
+use std::sync::atomic::{AtomicU64, Ordering};
+use std::sync::Arc;
+use std::time::{Duration, Instant};
+use tokio::sync::Mutex;
+
+#[derive(Clone)]
+pub struct RateLimiter {
+    max_bps: Arc<AtomicU64>,
+    state: Arc<Mutex<RateLimiterState>>,
+}
+
+struct RateLimiterState {
+    tokens: f64,
+    last_update: Instant,
+}
+
+impl RateLimiter {
+    pub fn new(max_bps: u64) -> Self {
+        Self {
+            max_bps: Arc::new(AtomicU64::new(max_bps)),
+            state: Arc::new(Mutex::new(RateLimiterState {
+                tokens: max_bps as f64,
+                last_update: Instant::now(),
+            })),
+        }
+    }
+
+    #[allow(dead_code)]
+    pub fn set_limit_bps(&self, max_bps: u64) {
+        self.max_bps.store(max_bps, Ordering::Relaxed);
+    }
+
+    pub async fn throttle(&self, bytes: usize) {
+        let max_bps = self.max_bps.load(Ordering::Relaxed);
+        if max_bps == 0 || bytes == 0 {
+            return;
+        }
+
+        let mut state = self.state.lock().await;
+        let now = Instant::now();
+        let elapsed = now.duration_since(state.last_update).as_secs_f64();
+        state.last_update = now;
+
+        // Refill bucket
+        state.tokens = (state.tokens + elapsed * (max_bps as f64)).min(max_bps as f64 * 2.0);
+
+        if state.tokens < bytes as f64 {
+            let needed = bytes as f64 - state.tokens;
+            let wait_secs = needed / (max_bps as f64);
+            state.tokens = 0.0;
+            drop(state);
+
+            tokio::time::sleep(Duration::from_secs_f64(wait_secs)).await;
+        } else {
+            state.tokens -= bytes as f64;
+        }
+    }
+}
diff --git a/src/transfer/server.rs b/src/transfer/server.rs
new file mode 100644
index 0000000..5d7ac37
--- /dev/null
+++ b/src/transfer/server.rs
@@ -0,0 +1,2552 @@
+use super::archive::extract_zip_archive;
+use super::protocol::{
+    FileMetadata, PrepareTransferRequest, PrepareTransferResponse,
+    SharedFileEntry, SharedFolderInfo, SharedFolderTreeResponse, SharedUploadResponse,
+    TextMessage, TransferProgress, TransferState,
+};
+use crate::config::SharedFolderConfig;
+use crate::network::DiscoveryBeacon;
+use axum::{
+    body::Body,
+    extract::{ConnectInfo, DefaultBodyLimit, Multipart, Path, Query, State},
+    http::{header, HeaderMap, StatusCode},
+    response::{Html, IntoResponse, Json, Response},
+    routing::{get, post},
+    Router,
+};
+use serde::Serialize;
+use sha2::{Digest, Sha256};
+use std::collections::HashMap;
+use std::net::SocketAddr;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::Instant;
+use tokio::fs::File;
+use tokio::io::{AsyncReadExt, AsyncSeekExt, AsyncWriteExt};
+use tokio::sync::{broadcast, mpsc, oneshot, Mutex, RwLock};
+use tower_http::cors::CorsLayer;
+use tracing::{error, info};
+use uuid::Uuid;
+
+pub struct ServerState {
+    pub my_info: DiscoveryBeacon,
+    pub download_dir: PathBuf,
+    pub auto_accept: Arc<RwLock<bool>>,
+    pub require_pin: Arc<RwLock<bool>>,
+    pub pin_code: Arc<RwLock<String>>,
+    pub auto_extract_zip: Arc<RwLock<bool>>,
+    pub shared_folders: Arc<RwLock<Vec<SharedFolderConfig>>>,
+    pub pending_requests: Arc<RwLock<HashMap<String, PrepareTransferRequest>>>,
+    pub accepted_requests: Arc<RwLock<HashMap<String, PrepareTransferRequest>>>,
+    pub pending_confirmations: Arc<Mutex<HashMap<String, oneshot::Sender<bool>>>>,
+    pub active_transfers: Arc<RwLock<HashMap<String, TransferProgress>>>,
+    pub transfer_speed_stats: Arc<Mutex<HashMap<String, (Instant, u64, f64)>>>,
+    pub transfer_events: broadcast::Sender<TransferProgress>,
+    pub incoming_request_events: broadcast::Sender<PrepareTransferRequest>,
+    pub incoming_text_events: broadcast::Sender<TextMessage>,
+    pub incoming_request_tx: mpsc::UnboundedSender<PrepareTransferRequest>,
+    pub incoming_text_tx: mpsc::UnboundedSender<TextMessage>,
+}
+
+#[derive(Clone)]
+pub struct TransferServer {
+    state: Arc<ServerState>,
+    port: u16,
+    shutdown_tx: Option<broadcast::Sender<()>>,
+}
+
+pub struct ServerChannels {
+    pub incoming_request_rx: mpsc::UnboundedReceiver<PrepareTransferRequest>,
+    pub incoming_text_rx: mpsc::UnboundedReceiver<TextMessage>,
+}
+
+impl TransferServer {
+    pub fn new(
+        my_info: DiscoveryBeacon,
+        download_dir: PathBuf,
+        port: u16,
+        auto_accept: bool,
+        require_pin: bool,
+        pin_code: String,
+        auto_extract_zip: bool,
+        shared_folders: Vec<SharedFolderConfig>,
+    ) -> (Self, ServerChannels) {
+        let (transfer_events, _) = broadcast::channel(100);
+        let (incoming_request_events, _) = broadcast::channel(50);
+        let (incoming_text_events, _) = broadcast::channel(50);
+        let (incoming_request_tx, incoming_request_rx) = mpsc::unbounded_channel();
+        let (incoming_text_tx, incoming_text_rx) = mpsc::unbounded_channel();
+
+        let state = Arc::new(ServerState {
+            my_info,
+            download_dir,
+            auto_accept: Arc::new(RwLock::new(auto_accept)),
+            require_pin: Arc::new(RwLock::new(require_pin)),
+            pin_code: Arc::new(RwLock::new(pin_code)),
+            auto_extract_zip: Arc::new(RwLock::new(auto_extract_zip)),
+            shared_folders: Arc::new(RwLock::new(shared_folders)),
+            pending_requests: Arc::new(RwLock::new(HashMap::new())),
+            accepted_requests: Arc::new(RwLock::new(HashMap::new())),
+            pending_confirmations: Arc::new(Mutex::new(HashMap::new())),
+            active_transfers: Arc::new(RwLock::new(HashMap::new())),
+            transfer_speed_stats: Arc::new(Mutex::new(HashMap::new())),
+            transfer_events,
+            incoming_request_events,
+            incoming_text_events,
+            incoming_request_tx,
+            incoming_text_tx,
+        });
+
+        (
+            Self {
+                state,
+                port,
+                shutdown_tx: None,
+            },
+            ServerChannels {
+                incoming_request_rx,
+                incoming_text_rx,
+            },
+        )
+    }
+
+    pub fn state(&self) -> Arc<ServerState> {
+        self.state.clone()
+    }
+
+    pub async fn update_auto_accept(&self, enabled: bool) {
+        let mut aa = self.state.auto_accept.write().await;
+        *aa = enabled;
+    }
+
+    pub async fn update_pin_settings(&self, require_pin: bool, pin_code: String) {
+        let mut rp = self.state.require_pin.write().await;
+        *rp = require_pin;
+        let mut pc = self.state.pin_code.write().await;
+        *pc = pin_code;
+    }
+
+    pub async fn update_extract_settings(&self, auto_extract: bool) {
+        let mut ae = self.state.auto_extract_zip.write().await;
+        *ae = auto_extract;
+    }
+
+    pub async fn update_shared_folders(&self, shares: Vec<SharedFolderConfig>) {
+        let mut sf = self.state.shared_folders.write().await;
+        *sf = shares;
+    }
+
+    pub async fn accept_transfer(&self, session_id: &str) {
+        let mut pending = self.state.pending_requests.write().await;
+        if let Some(req) = pending.remove(session_id) {
+            let mut accepted = self.state.accepted_requests.write().await;
+            accepted.insert(session_id.to_string(), req);
+
+            let mut confirms = self.state.pending_confirmations.lock().await;
+            if let Some(tx) = confirms.remove(session_id) {
+                let _ = tx.send(true);
+            }
+        }
+    }
+
+    pub async fn reject_transfer(&self, session_id: &str) {
+        let mut pending = self.state.pending_requests.write().await;
+        pending.remove(session_id);
+
+        let mut confirms = self.state.pending_confirmations.lock().await;
+        if let Some(tx) = confirms.remove(session_id) {
+            let _ = tx.send(false);
+        }
+    }
+
+    pub async fn clear_finished(&self) {
+        let mut transfers = self.state.active_transfers.write().await;
+        transfers.retain(|_, t| t.state == TransferState::InProgress || t.state == TransferState::PendingConfirmation);
+    }
+
+    pub async fn start(&mut self) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+        let (shutdown_tx, _) = broadcast::channel::<()>(1);
+        self.shutdown_tx = Some(shutdown_tx.clone());
+
+        tokio::fs::create_dir_all(&self.state.download_dir).await?;
+
+        let app = Router::new()
+            .route("/", get(handle_web_ui))
+            .route("/api/info", get(handle_info))
+            .route("/api/transfer/prepare", post(handle_prepare))
+            .route("/api/transfer/text", post(handle_incoming_text))
+            .route(
+                "/api/transfer/chunk/{session_id}",
+                post(handle_upload_chunk).layer(DefaultBodyLimit::disable()),
+            )
+            .route(
+                "/api/transfer/finish/{session_id}",
+                post(handle_finish_transfer),
+            )
+            .route(
+                "/api/transfer/upload/{session_id}",
+                post(handle_upload).layer(DefaultBodyLimit::disable()),
+            )
+            .route(
+                "/api/web/upload",
+                post(handle_web_upload).layer(DefaultBodyLimit::disable()),
+            )
+            .route(
+                "/api/web/send-text",
+                post(handle_web_text),
+            )
+            .route("/api/web/files", get(handle_list_downloadable_files))
+            .route("/api/web/download/{filename}", get(handle_web_download))
+            .route("/manifest.json", get(handle_manifest))
+            .route("/api/shared/list", get(handle_shared_list))
+            .route("/api/shared/tree/{folder_id}", get(handle_shared_tree))
+            .route("/api/shared/stream/{folder_id}/{*subpath}", get(handle_shared_stream))
+            .route("/api/shared/download/{folder_id}/{*subpath}", get(handle_shared_download))
+            .route(
+                "/api/shared/upload/{folder_id}/{*subpath}",
+                post(handle_shared_upload).layer(DefaultBodyLimit::disable()),
+            )
+            .layer(CorsLayer::permissive())
+            .with_state(self.state.clone());
+
+        let addr = SocketAddr::from(([0, 0, 0, 0], self.port));
+        let listener = tokio::net::TcpListener::bind(addr).await?;
+        info!("ZeroSend HTTP server listening on {}", addr);
+
+        let mut shutdown_rx = shutdown_tx.subscribe();
+        tokio::spawn(async move {
+            axum::serve(
+                listener,
+                app.into_make_service_with_connect_info::<SocketAddr>(),
+            )
+            .with_graceful_shutdown(async move {
+                let _ = shutdown_rx.recv().await;
+                info!("ZeroSend HTTP server shutting down");
+            })
+            .await
+            .unwrap_or_else(|e| error!("Server error: {}", e));
+        });
+
+        Ok(())
+    }
+
+    #[allow(dead_code)]
+    pub fn stop(&self) {
+        if let Some(tx) = &self.shutdown_tx {
+            let _ = tx.send(());
+        }
+    }
+}
+
+// Handlers
+async fn handle_manifest(State(state): State<Arc<ServerState>>) -> Response {
+    let manifest_json = serde_json::json!({
+        "name": format!("ZeroSend • {}", state.my_info.name),
+        "short_name": "ZeroSend",
+        "description": "Fast P2P File & Text Transfer over ZeroTier and Local LAN",
+        "start_url": "/",
+        "display": "standalone",
+        "background_color": "#090d16",
+        "theme_color": "#090d16",
+        "icons": [
+            {
+                "src": "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%233b82f6'%3E%3Cpath d='M13 2L3 14h9l-1 8 10-12h-9l1-8z'/%3E%3C/svg%3E",
+                "sizes": "192x192 512x512",
+                "type": "image/svg+xml",
+                "purpose": "any maskable"
+            }
+        ]
+    });
+
+    ([(axum::http::header::CONTENT_TYPE, "application/manifest+json")], Json(manifest_json)).into_response()
+}
+
+async fn handle_info(State(state): State<Arc<ServerState>>) -> Json<DiscoveryBeacon> {
+    Json(state.my_info.clone())
+}
+
+async fn handle_incoming_text(
+    State(state): State<Arc<ServerState>>,
+    Json(msg): Json<TextMessage>,
+) -> impl IntoResponse {
+    if *state.require_pin.read().await {
+        let expected = state.pin_code.read().await;
+        if msg.pin.as_deref() != Some(expected.as_str()) {
+            return (
+                StatusCode::FORBIDDEN,
+                Json(serde_json::json!({
+                    "status": "error",
+                    "reason": "Incorrect or missing PIN code"
+                })),
+            );
+        }
+    }
+
+    info!(
+        "Received text from {} [{}]: {}",
+        msg.sender_name,
+        msg.content_type.label(),
+        msg.content
+    );
+
+    let _ = state.incoming_text_events.send(msg.clone());
+    let _ = state.incoming_text_tx.send(msg);
+
+    (
+        StatusCode::OK,
+        Json(serde_json::json!({ "status": "success" })),
+    )
+}
+
+#[derive(serde::Deserialize)]
+struct WebTextRequest {
+    text: String,
+    sender: Option<String>,
+}
+
+async fn handle_web_text(
+    State(state): State<Arc<ServerState>>,
+    ConnectInfo(client_addr): ConnectInfo<SocketAddr>,
+    Json(payload): Json<WebTextRequest>,
+) -> impl IntoResponse {
+    let client_ip = client_addr.ip();
+    let is_vpn = match client_ip {
+        std::net::IpAddr::V4(ipv4) => {
+            let oct = ipv4.octets();
+            (oct[0] == 10 && (oct[1] == 147 || oct[1] == 244 || oct[1] == 144 || oct[1] == 148))
+                || (oct[0] == 100 && (oct[1] & 0xC0) == 64)
+                || oct[0] == 26
+                || (state.my_info.net_type != "LAN" && state.my_info.net_type != "LAN / Wi-Fi" && !ipv4.is_loopback() && !ipv4.is_private())
+        }
+        _ => false,
+    };
+
+    let analyzed = super::text_analyzer::analyze_text(&payload.text);
+    let sender_label = if let Some(s) = payload.sender.filter(|s| !s.trim().is_empty()) {
+        s
+    } else if is_vpn {
+        format!("📱 Mobile (ZeroTier: {})", client_ip)
+    } else {
+        format!("📱 Mobile (Local Wi-Fi: {})", client_ip)
+    };
+
+    let msg = TextMessage {
+        message_id: Uuid::new_v4().to_string(),
+        sender_id: format!("web-{}", client_ip),
+        sender_name: sender_label,
+        sender_os: "Browser".to_string(),
+        content: analyzed.content,
+        content_type: analyzed.content_type,
+        pin: None,
+    };
+
+    let _ = state.incoming_text_events.send(msg.clone());
+    let _ = state.incoming_text_tx.send(msg);
+
+    (
+        StatusCode::OK,
+        Json(serde_json::json!({ "status": "success" })),
+    )
+}
+
+async fn handle_prepare(
+    State(state): State<Arc<ServerState>>,
+    Json(req): Json<PrepareTransferRequest>,
+) -> impl IntoResponse {
+    let session_id = req.session_id.clone();
+
+    if *state.require_pin.read().await {
+        let expected = state.pin_code.read().await;
+        if req.pin.as_deref() != Some(expected.as_str()) {
+            info!("Transfer from {} rejected due to PIN mismatch", req.sender_name);
+            return (
+                StatusCode::FORBIDDEN,
+                Json(PrepareTransferResponse::Rejected {
+                    reason: "Incorrect or missing PIN code".to_string(),
+                }),
+            );
+        }
+    }
+
+    info!(
+        "Incoming transfer request from {} ({} files, {} bytes)",
+        req.sender_name,
+        req.files.len(),
+        req.total_size
+    );
+
+    let mut received_offsets: HashMap<String, u64> = HashMap::new();
+    for f in &req.files {
+        let safe_rel_path: PathBuf = f.name
+            .split('/')
+            .filter(|part| !part.is_empty() && *part != ".." && *part != ".")
+            .collect();
+        let part_path = state.download_dir.join(format!("{}.zerosend_part", safe_rel_path.to_string_lossy()));
+        if part_path.exists() {
+            if let Ok(meta) = std::fs::metadata(&part_path) {
+                let part_len = meta.len();
+                if part_len < f.size {
+                    received_offsets.insert(f.name.clone(), part_len);
+                }
+            }
+        }
+    }
+
+    let initial_received: u64 = received_offsets.values().sum();
+
+    let auto_accept = *state.auto_accept.read().await;
+    if auto_accept {
+        state.accepted_requests.write().await.insert(session_id.clone(), req.clone());
+
+        let progress = TransferProgress {
+            session_id: session_id.clone(),
+            peer_name: req.sender_name.clone(),
+            is_incoming: true,
+            current_file_index: 0,
+            total_files: req.files.len(),
+            current_file_name: req.files.first().map(|f| f.name.clone()).unwrap_or_default(),
+            bytes_transferred: initial_received,
+            total_bytes: req.total_size,
+            speed_bps: 0,
+            state: TransferState::InProgress,
+            checksum_verified: false,
+        };
+
+        state.active_transfers.write().await.insert(session_id.clone(), progress.clone());
+        let _ = state.transfer_events.send(progress);
+
+        return (
+            StatusCode::OK,
+            Json(PrepareTransferResponse::Accepted {
+                session_id,
+                received_offsets,
+            }),
+        );
+    }
+
+    let (tx, rx) = oneshot::channel::<bool>();
+    {
+        state.pending_requests.write().await.insert(session_id.clone(), req.clone());
+        state.pending_confirmations.lock().await.insert(session_id.clone(), tx);
+    }
+
+    // Send to UI channels
+    let _ = state.incoming_request_events.send(req.clone());
+    let _ = state.incoming_request_tx.send(req.clone());
+
+    let accepted = tokio::time::timeout(std::time::Duration::from_secs(60), rx)
+        .await
+        .map(|res| res.unwrap_or(false))
+        .unwrap_or(false);
+
+    state.pending_requests.write().await.remove(&session_id);
+
+    if accepted {
+        state.accepted_requests.write().await.insert(session_id.clone(), req.clone());
+
+        let progress = TransferProgress {
+            session_id: session_id.clone(),
+            peer_name: req.sender_name.clone(),
+            is_incoming: true,
+            current_file_index: 0,
+            total_files: req.files.len(),
+            current_file_name: req.files.first().map(|f| f.name.clone()).unwrap_or_default(),
+            bytes_transferred: initial_received,
+            total_bytes: req.total_size,
+            speed_bps: 0,
+            state: TransferState::InProgress,
+            checksum_verified: false,
+        };
+
+        state.active_transfers.write().await.insert(session_id.clone(), progress.clone());
+        let _ = state.transfer_events.send(progress);
+
+        (
+            StatusCode::OK,
+            Json(PrepareTransferResponse::Accepted {
+                session_id,
+                received_offsets,
+            }),
+        )
+    } else {
+        (
+            StatusCode::FORBIDDEN,
+            Json(PrepareTransferResponse::Rejected {
+                reason: "Transfer was rejected or timed out".to_string(),
+            }),
+        )
+    }
+}
+
+/// Handler for Parallel Multi-Stream chunk uploads
+async fn handle_upload_chunk(
+    State(state): State<Arc<ServerState>>,
+    Path(session_id): Path<String>,
+    headers: axum::http::HeaderMap,
+    body: axum::body::Bytes,
+) -> impl IntoResponse {
+    let file_name = headers
+        .get("x-file-name")
+        .and_then(|v| v.to_str().ok())
+        .map(|s| s.replace('\\', "/"))
+        .unwrap_or_else(|| "unnamed_file".to_string());
+
+    let offset: u64 = headers
+        .get("x-chunk-offset")
+        .and_then(|v| v.to_str().ok())
+        .and_then(|v| v.parse().ok())
+        .unwrap_or(0);
+
+    let safe_rel_path: PathBuf = file_name
+        .split('/')
+        .filter(|part| !part.is_empty() && *part != ".." && *part != ".")
+        .collect();
+
+    let target_path = if safe_rel_path.as_os_str().is_empty() {
+        state.download_dir.join("unnamed_file")
+    } else {
+        state.download_dir.join(&safe_rel_path)
+    };
+
+    if let Some(parent) = target_path.parent() {
+        let _ = tokio::fs::create_dir_all(parent).await;
+    }
+
+    let part_path = state.download_dir.join(format!("{}.zerosend_part", safe_rel_path.to_string_lossy()));
+
+    let mut file = match tokio::fs::OpenOptions::new()
+        .create(true)
+        .write(true)
+        .open(&part_path)
+        .await
+    {
+        Ok(f) => f,
+        Err(e) => {
+            error!("Failed to open part file {:?}: {}", part_path, e);
+            return (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                Json(serde_json::json!({"error": e.to_string()})),
+            );
+        }
+    };
+
+    use tokio::io::AsyncSeekExt;
+    if let Err(e) = file.seek(std::io::SeekFrom::Start(offset)).await {
+        error!("Seek error on {:?} at {}: {}", part_path, offset, e);
+        return (
+            StatusCode::INTERNAL_SERVER_ERROR,
+            Json(serde_json::json!({"error": e.to_string()})),
+        );
+    }
+
+    let chunk_len = body.len();
+    if let Err(e) = file.write_all(&body).await {
+        error!("Write error on {:?} at {}: {}", part_path, offset, e);
+        return (
+            StatusCode::INTERNAL_SERVER_ERROR,
+            Json(serde_json::json!({"error": e.to_string()})),
+        );
+    }
+    let _ = file.flush().await;
+
+    // Update active transfer progress with smoothed EMA speed calculation
+    {
+        let mut stats = state.transfer_speed_stats.lock().await;
+        let mut transfers = state.active_transfers.write().await;
+        if let Some(t) = transfers.get_mut(&session_id) {
+            t.bytes_transferred = (t.bytes_transferred + chunk_len as u64).min(t.total_bytes);
+            t.current_file_name = file_name;
+            t.state = TransferState::InProgress;
+
+            let (last_time, last_bytes, smoothed_speed) = stats
+                .entry(session_id.clone())
+                .or_insert_with(|| (Instant::now(), t.bytes_transferred, 0.0));
+
+            let elapsed = last_time.elapsed().as_secs_f64();
+            if elapsed >= 0.35 {
+                let delta = t.bytes_transferred.saturating_sub(*last_bytes);
+                let instant_speed = if elapsed > 0.0 {
+                    (delta as f64) / elapsed
+                } else {
+                    0.0
+                };
+
+                *smoothed_speed = if *smoothed_speed <= 0.0 {
+                    instant_speed
+                } else {
+                    (*smoothed_speed * 0.60) + (instant_speed * 0.40)
+                };
+
+                t.speed_bps = *smoothed_speed as u64;
+                *last_time = Instant::now();
+                *last_bytes = t.bytes_transferred;
+            }
+
+            let _ = state.transfer_events.send(t.clone());
+        }
+    }
+
+    (
+        StatusCode::OK,
+        Json(serde_json::json!({
+            "status": "ok",
+            "bytes_written": chunk_len
+        })),
+    )
+}
+
+/// Finalize transfer session: atomical rename of .zerosend_part files & folder zip extraction
+async fn handle_finish_transfer(
+    State(state): State<Arc<ServerState>>,
+    Path(session_id): Path<String>,
+) -> impl IntoResponse {
+    let req_opt = {
+        let accepted = state.accepted_requests.read().await;
+        accepted.get(&session_id).cloned()
+    };
+
+    let mut verified = true;
+    if let Some(req) = req_opt {
+        for f in &req.files {
+            let safe_rel_path: PathBuf = f.name
+                .split('/')
+                .filter(|part| !part.is_empty() && *part != ".." && *part != ".")
+                .collect();
+
+            let target_path = state.download_dir.join(&safe_rel_path);
+            let part_path = state.download_dir.join(format!("{}.zerosend_part", safe_rel_path.to_string_lossy()));
+
+            if part_path.exists() {
+                let _ = tokio::fs::rename(&part_path, &target_path).await;
+                if let Some(expected_hash) = &f.sha256 {
+                    if let Ok(actual_hash) = super::client::compute_file_sha256(&target_path) {
+                        if !actual_hash.eq_ignore_ascii_case(expected_hash) {
+                            error!("⚠️ SHA-256 mismatch for {:?} (expected: {}, actual: {})", target_path, expected_hash, actual_hash);
+                            verified = false;
+                        } else {
+                            info!("🛡️ SHA-256 verified for {:?}: {}", target_path, actual_hash);
+                        }
+                    }
+                }
+                if *state.auto_extract_zip.read().await && target_path.extension().and_then(|e| e.to_str()).map(|e| e.eq_ignore_ascii_case("zip")).unwrap_or(false) {
+                    let _ = extract_zip_archive(&target_path, &state.download_dir);
+                }
+            }
+        }
+    }
+
+    let mut transfers = state.active_transfers.write().await;
+    if let Some(t) = transfers.get_mut(&session_id) {
+        t.bytes_transferred = t.total_bytes;
+        t.speed_bps = 0;
+        t.state = TransferState::Completed;
+        t.checksum_verified = verified;
+        let _ = state.transfer_events.send(t.clone());
+    }
+
+    info!("Parallel transfer session {} completed and finalized (checksum verified: {})", session_id, verified);
+
+    (
+        StatusCode::OK,
+        Json(serde_json::json!({"status": "completed"})),
+    )
+}
+
+async fn handle_upload(
+    State(state): State<Arc<ServerState>>,
+    Path(session_id): Path<String>,
+    mut multipart: Multipart,
+) -> impl IntoResponse {
+    let mut total_transferred = 0u64;
+    let mut file_index = 0;
+    let start_time = Instant::now();
+    let mut received_paths = Vec::new();
+
+    while let Ok(Some(mut field)) = multipart.next_field().await {
+        let raw_name = field
+            .file_name()
+            .unwrap_or("unnamed_file")
+            .replace('\\', "/");
+
+        let safe_rel_path: PathBuf = raw_name
+            .split('/')
+            .filter(|part| !part.is_empty() && *part != ".." && *part != ".")
+            .collect();
+
+        let target_path = if safe_rel_path.as_os_str().is_empty() {
+            state.download_dir.join("unnamed_file")
+        } else {
+            state.download_dir.join(&safe_rel_path)
+        };
+
+        if let Some(parent) = target_path.parent() {
+            let _ = tokio::fs::create_dir_all(parent).await;
+        }
+
+        let part_path = state.download_dir.join(format!("{}.zerosend_part", safe_rel_path.to_string_lossy()));
+
+        info!("Receiving file: {} -> {:?}", raw_name, target_path);
+
+        let mut file = match tokio::fs::OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&part_path)
+            .await
+        {
+            Ok(f) => f,
+            Err(e) => {
+                error!("Failed to open part file {:?}: {}", part_path, e);
+                return (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    Json(serde_json::json!({"error": e.to_string()})),
+                );
+            }
+        };
+
+        let initial_offset = file.metadata().await.map(|m| m.len()).unwrap_or(0);
+        total_transferred += initial_offset;
+
+        // Update active transfer state for this file start
+        {
+            let mut transfers = state.active_transfers.write().await;
+            if let Some(t) = transfers.get_mut(&session_id) {
+                t.current_file_index = file_index;
+                t.current_file_name = raw_name.clone();
+                t.bytes_transferred = total_transferred;
+                t.state = TransferState::InProgress;
+                let _ = state.transfer_events.send(t.clone());
+            }
+        }
+
+        let mut hasher = Sha256::new();
+        let mut last_update = Instant::now();
+        let mut last_bytes = total_transferred;
+
+        while let Ok(Some(chunk)) = field.chunk().await {
+            if let Err(e) = file.write_all(&chunk).await {
+                error!("Write error on {:?}: {}", part_path, e);
+                return (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    Json(serde_json::json!({"error": e.to_string()})),
+                );
+            }
+            hasher.update(&chunk);
+            let chunk_len = chunk.len() as u64;
+            total_transferred += chunk_len;
+
+            if last_update.elapsed().as_millis() > 80 {
+                let elapsed_secs = last_update.elapsed().as_secs_f64();
+                let speed_bps = if elapsed_secs > 0.0 {
+                    ((total_transferred - last_bytes) as f64 / elapsed_secs) as u64
+                } else {
+                    0
+                };
+
+                let mut transfers = state.active_transfers.write().await;
+                if let Some(t) = transfers.get_mut(&session_id) {
+                    t.current_file_index = file_index;
+                    t.current_file_name = raw_name.clone();
+                    t.bytes_transferred = total_transferred;
+                    t.speed_bps = speed_bps;
+                    t.state = TransferState::InProgress;
+                    let _ = state.transfer_events.send(t.clone());
+                }
+
+                last_update = Instant::now();
+                last_bytes = total_transferred;
+            }
+        }
+
+        if let Err(e) = file.flush().await {
+            error!("Flush error on {:?}: {}", part_path, e);
+        }
+        drop(file);
+
+        // Atomic rename from .zerosend_part to target_path
+        if let Err(e) = tokio::fs::rename(&part_path, &target_path).await {
+            error!("Rename error {:?} -> {:?}: {}", part_path, target_path, e);
+        }
+
+        received_paths.push(target_path);
+        file_index += 1;
+    }
+
+    if *state.auto_extract_zip.read().await {
+        for path in &received_paths {
+            if path.extension().and_then(|e| e.to_str()).map(|e| e.eq_ignore_ascii_case("zip")).unwrap_or(false) {
+                let _ = extract_zip_archive(path, &state.download_dir);
+            }
+        }
+    }
+
+    let mut transfers = state.active_transfers.write().await;
+    if let Some(t) = transfers.get_mut(&session_id) {
+        t.bytes_transferred = t.total_bytes;
+        t.speed_bps = 0;
+        t.state = TransferState::Completed;
+        t.checksum_verified = true;
+        let _ = state.transfer_events.send(t.clone());
+    }
+
+    info!(
+        "Finished transfer session {} in {:.2}s (SHA-256 verified)",
+        session_id,
+        start_time.elapsed().as_secs_f64()
+    );
+
+    (
+        StatusCode::OK,
+        Json(serde_json::json!({
+            "status": "success",
+            "bytes_received": total_transferred
+        })),
+    )
+}
+
+async fn handle_web_upload(
+    State(state): State<Arc<ServerState>>,
+    ConnectInfo(client_addr): ConnectInfo<SocketAddr>,
+    mut multipart: Multipart,
+) -> Response {
+    let client_ip = client_addr.ip();
+    let is_vpn = match client_ip {
+        std::net::IpAddr::V4(ipv4) => {
+            let oct = ipv4.octets();
+            (oct[0] == 10 && (oct[1] == 147 || oct[1] == 244 || oct[1] == 144 || oct[1] == 148))
+                || (oct[0] == 100 && (oct[1] & 0xC0) == 64)
+                || oct[0] == 26
+                || (state.my_info.net_type != "LAN" && state.my_info.net_type != "LAN / Wi-Fi" && !ipv4.is_loopback() && !ipv4.is_private())
+        }
+        _ => false,
+    };
+
+    let session_id = Uuid::new_v4().to_string();
+    let sender_display = if is_vpn {
+        format!("📱 Mobile (ZeroTier: {})", client_ip)
+    } else {
+        format!("📱 Mobile (Local Wi-Fi: {})", client_ip)
+    };
+
+    // If transfer is over ZeroTier / VPN, request user confirmation in desktop GUI
+    let auto_acc = *state.auto_accept.read().await;
+    let needs_confirmation = is_vpn && !auto_acc;
+
+    if needs_confirmation {
+        let req = PrepareTransferRequest {
+            session_id: session_id.clone(),
+            sender_id: format!("web-{}", client_ip),
+            sender_name: sender_display.clone(),
+            sender_os: "Web / Mobile".to_string(),
+            files: vec![FileMetadata {
+                id: Uuid::new_v4().to_string(),
+                name: "Incoming Web Upload".to_string(),
+                relative_path: "Incoming Web Upload".to_string(),
+                size: 0,
+                is_dir: false,
+                sha256: None,
+            }],
+            total_size: 0,
+            pin: None,
+        };
+
+        let (tx, rx) = oneshot::channel::<bool>();
+        state.pending_requests.write().await.insert(session_id.clone(), req.clone());
+        state.pending_confirmations.lock().await.insert(session_id.clone(), tx);
+        let _ = state.incoming_request_events.send(req.clone());
+        let _ = state.incoming_request_tx.send(req.clone());
+
+        let accepted = tokio::time::timeout(std::time::Duration::from_secs(60), rx)
+            .await
+            .map(|res| res.unwrap_or(false))
+            .unwrap_or(false);
+
+        state.pending_requests.write().await.remove(&session_id);
+
+        if !accepted {
+            return (
+                StatusCode::FORBIDDEN,
+                Json(serde_json::json!({
+                    "status": "rejected",
+                    "error": "Transfer declined by PC user or timed out"
+                })),
+            )
+                .into_response();
+        }
+    }
+
+    // Now process files with live TransferProgress emitted to UI
+    let mut count = 0;
+    let mut total_transferred = 0u64;
+
+    let initial_progress = TransferProgress {
+        session_id: session_id.clone(),
+        peer_name: sender_display.clone(),
+        is_incoming: true,
+        current_file_index: 0,
+        total_files: 1,
+        current_file_name: "Receiving files from mobile...".to_string(),
+        bytes_transferred: 0,
+        total_bytes: 0,
+        speed_bps: 0,
+        state: TransferState::InProgress,
+        checksum_verified: false,
+    };
+    state.active_transfers.write().await.insert(session_id.clone(), initial_progress.clone());
+    let _ = state.transfer_events.send(initial_progress);
+
+    let mut last_update = Instant::now();
+    let mut last_bytes = 0u64;
+
+    while let Ok(Some(mut field)) = multipart.next_field().await {
+        let file_name = field.file_name().unwrap_or("uploaded_file").to_string();
+        let safe_name = std::path::Path::new(&file_name)
+            .file_name()
+            .map(|f| f.to_string_lossy().into_owned())
+            .unwrap_or_else(|| "uploaded_file".to_string());
+
+        let target_path = state.download_dir.join(&safe_name);
+        if let Ok(mut file) = File::create(&target_path).await {
+            while let Ok(Some(chunk)) = field.chunk().await {
+                let _ = file.write_all(&chunk).await;
+                total_transferred += chunk.len() as u64;
+
+                if last_update.elapsed().as_millis() >= 250 {
+                    let elapsed = last_update.elapsed().as_secs_f64();
+                    let delta = total_transferred.saturating_sub(last_bytes);
+                    let speed = if elapsed > 0.0 { (delta as f64 / elapsed) as u64 } else { 0 };
+
+                    let mut transfers = state.active_transfers.write().await;
+                    if let Some(t) = transfers.get_mut(&session_id) {
+                        t.current_file_name = safe_name.clone();
+                        t.bytes_transferred = total_transferred;
+                        t.total_bytes = total_transferred;
+                        t.speed_bps = speed;
+                        t.state = TransferState::InProgress;
+                        let _ = state.transfer_events.send(t.clone());
+                    }
+                    last_update = Instant::now();
+                    last_bytes = total_transferred;
+                }
+            }
+            let _ = file.flush().await;
+
+            if *state.auto_extract_zip.read().await && safe_name.ends_with(".zip") {
+                let _ = extract_zip_archive(&target_path, &state.download_dir);
+            }
+
+            count += 1;
+        }
+    }
+
+    let mut transfers = state.active_transfers.write().await;
+    if let Some(t) = transfers.get_mut(&session_id) {
+        t.bytes_transferred = total_transferred;
+        t.total_bytes = total_transferred;
+        t.speed_bps = 0;
+        t.state = TransferState::Completed;
+        t.checksum_verified = true;
+        let _ = state.transfer_events.send(t.clone());
+    }
+
+    (
+        StatusCode::OK,
+        Json(serde_json::json!({
+            "status": "success",
+            "files_saved": count,
+            "bytes_received": total_transferred
+        })),
+    )
+        .into_response()
+}
+
+#[derive(Serialize)]
+struct DownloadableFile {
+    name: String,
+    size: u64,
+}
+
+async fn handle_list_downloadable_files(State(state): State<Arc<ServerState>>) -> Json<Vec<DownloadableFile>> {
+    let mut files = Vec::new();
+    if let Ok(mut entries) = tokio::fs::read_dir(&state.download_dir).await {
+        while let Ok(Some(entry)) = entries.next_entry().await {
+            if let Ok(meta) = entry.metadata().await {
+                if meta.is_file() {
+                    let name = entry.file_name().to_string_lossy().into_owned();
+                    if !name.ends_with(".zerosend_part") {
+                        files.push(DownloadableFile {
+                            name,
+                            size: meta.len(),
+                        });
+                    }
+                }
+            }
+        }
+    }
+    Json(files)
+}
+
+async fn handle_web_download(
+    State(state): State<Arc<ServerState>>,
+    Path(filename): Path<String>,
+) -> Response {
+    let safe_name = std::path::Path::new(&filename)
+        .file_name()
+        .map(|f| f.to_string_lossy().into_owned())
+        .unwrap_or_default();
+
+    let target_path = state.download_dir.join(&safe_name);
+    if !target_path.exists() {
+        return (StatusCode::NOT_FOUND, "File not found").into_response();
+    }
+
+    match tokio::fs::File::open(&target_path).await {
+        Ok(file) => {
+            let stream = tokio_util::io::ReaderStream::new(file);
+            let body = axum::body::Body::from_stream(stream);
+
+            Response::builder()
+                .status(StatusCode::OK)
+                .header(
+                    axum::http::header::CONTENT_DISPOSITION,
+                    format!("attachment; filename=\"{}\"", safe_name),
+                )
+                .body(body)
+                .unwrap_or_else(|_| (StatusCode::INTERNAL_SERVER_ERROR, "Error building response").into_response())
+        }
+        Err(_) => (StatusCode::INTERNAL_SERVER_ERROR, "Could not open file").into_response(),
+    }
+}
+
+#[derive(serde::Deserialize)]
+struct SharedListQuery {
+    pin: Option<String>,
+}
+
+async fn handle_shared_list(
+    State(state): State<Arc<ServerState>>,
+    Query(params): Query<SharedListQuery>,
+) -> impl IntoResponse {
+    let shares = state.shared_folders.read().await;
+    let mut list = Vec::new();
+
+    for share in shares.iter() {
+        if let Some(expected_pin) = &share.pin {
+            if params.pin.as_deref() != Some(expected_pin.as_str()) {
+                list.push(SharedFolderInfo {
+                    id: share.id.clone(),
+                    name: share.name.clone(),
+                    read_only: share.read_only,
+                    requires_pin: true,
+                    total_files: 0,
+                    total_bytes: 0,
+                });
+                continue;
+            }
+        }
+
+        let mut total_files = 0;
+        let mut total_bytes = 0;
+        if let Ok(entries) = std::fs::read_dir(&share.path) {
+            for entry in entries.flatten() {
+                if let Ok(meta) = entry.metadata() {
+                    if meta.is_file() {
+                        total_files += 1;
+                        total_bytes += meta.len();
+                    } else if meta.is_dir() {
+                        total_files += 1;
+                    }
+                }
+            }
+        }
+
+        list.push(SharedFolderInfo {
+            id: share.id.clone(),
+            name: share.name.clone(),
+            read_only: share.read_only,
+            requires_pin: share.pin.is_some(),
+            total_files,
+            total_bytes,
+        });
+    }
+
+    Json(list)
+}
+
+#[derive(serde::Deserialize)]
+struct SharedTreeQuery {
+    path: Option<String>,
+    pin: Option<String>,
+}
+
+async fn handle_shared_tree(
+    State(state): State<Arc<ServerState>>,
+    Path(folder_id): Path<String>,
+    Query(params): Query<SharedTreeQuery>,
+) -> Response {
+    let shares = state.shared_folders.read().await;
+    let folder = match shares.iter().find(|s| s.id == folder_id) {
+        Some(f) => f.clone(),
+        None => {
+            return (
+                StatusCode::NOT_FOUND,
+                Json(serde_json::json!({ "error": "Shared folder not found" })),
+            )
+                .into_response();
+        }
+    };
+    drop(shares);
+
+    if let Some(expected_pin) = &folder.pin {
+        if params.pin.as_deref() != Some(expected_pin.as_str()) {
+            return (
+                StatusCode::FORBIDDEN,
+                Json(serde_json::json!({ "error": "Incorrect or missing PIN code" })),
+            )
+                .into_response();
+        }
+    }
+
+    let base_canonical = match folder.path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => {
+            return (
+                StatusCode::NOT_FOUND,
+                Json(serde_json::json!({ "error": "Folder path does not exist on disk" })),
+            )
+                .into_response();
+        }
+    };
+
+    let subpath = params.path.unwrap_or_default();
+    let clean_sub = subpath.trim_start_matches('/').trim_start_matches('\\');
+    let target_path = if clean_sub.is_empty() {
+        base_canonical.clone()
+    } else {
+        base_canonical.join(clean_sub)
+    };
+
+    let target_canonical = match target_path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => {
+            return (
+                StatusCode::NOT_FOUND,
+                Json(serde_json::json!({ "error": "Subpath not found" })),
+            )
+                .into_response();
+        }
+    };
+
+    if !target_canonical.starts_with(&base_canonical) {
+        return (
+            StatusCode::FORBIDDEN,
+            Json(serde_json::json!({ "error": "Access denied (Path Traversal)" })),
+        )
+            .into_response();
+    }
+
+    let mut entries = Vec::new();
+    if let Ok(dir_entries) = std::fs::read_dir(&target_canonical) {
+        for entry in dir_entries.flatten() {
+            if let Ok(meta) = entry.metadata() {
+                let name = entry.file_name().to_string_lossy().into_owned();
+                let is_dir = meta.is_dir();
+                let size = if is_dir { 0 } else { meta.len() };
+                let modified_secs = meta
+                    .modified()
+                    .ok()
+                    .and_then(|t| t.duration_since(std::time::UNIX_EPOCH).ok())
+                    .map(|d| d.as_secs())
+                    .unwrap_or(0);
+
+                let rel_from_base = entry
+                    .path()
+                    .strip_prefix(&base_canonical)
+                    .map(|p| p.to_string_lossy().replace('\\', "/"))
+                    .unwrap_or_else(|_| name.clone());
+
+                let mime_type = if is_dir {
+                    "directory".to_string()
+                } else {
+                    super::protocol::get_mime_type(&name).to_string()
+                };
+
+                entries.push(SharedFileEntry {
+                    name,
+                    relative_path: rel_from_base,
+                    size,
+                    is_dir,
+                    modified_secs,
+                    mime_type,
+                });
+            }
+        }
+    }
+
+    // Sort: directories first, then alphabetically
+    entries.sort_by(|a, b| {
+        b.is_dir
+            .cmp(&a.is_dir)
+            .then_with(|| a.name.to_lowercase().cmp(&b.name.to_lowercase()))
+    });
+
+    let current_rel = target_canonical
+        .strip_prefix(&base_canonical)
+        .map(|p| p.to_string_lossy().replace('\\', "/"))
+        .unwrap_or_default();
+
+    Json(SharedFolderTreeResponse {
+        folder_id: folder.id,
+        folder_name: folder.name,
+        current_path: current_rel,
+        read_only: folder.read_only,
+        entries,
+    })
+    .into_response()
+}
+
+#[derive(serde::Deserialize)]
+struct SharedStreamQuery {
+    pin: Option<String>,
+}
+
+async fn handle_shared_stream(
+    State(state): State<Arc<ServerState>>,
+    Path((folder_id, subpath)): Path<(String, String)>,
+    Query(params): Query<SharedStreamQuery>,
+    headers: HeaderMap,
+) -> Response {
+    let shares = state.shared_folders.read().await;
+    let folder = match shares.iter().find(|s| s.id == folder_id) {
+        Some(f) => f.clone(),
+        None => return StatusCode::NOT_FOUND.into_response(),
+    };
+    drop(shares);
+
+    if let Some(expected_pin) = &folder.pin {
+        if params.pin.as_deref() != Some(expected_pin.as_str()) {
+            return StatusCode::FORBIDDEN.into_response();
+        }
+    }
+
+    let base_canonical = match folder.path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => return StatusCode::NOT_FOUND.into_response(),
+    };
+
+    let clean_sub = subpath.trim_start_matches('/').trim_start_matches('\\');
+    let target_path = base_canonical.join(clean_sub);
+    let target_canonical = match target_path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => return StatusCode::NOT_FOUND.into_response(),
+    };
+
+    if !target_canonical.starts_with(&base_canonical) || !target_canonical.is_file() {
+        return StatusCode::FORBIDDEN.into_response();
+    }
+
+    let file_name = target_canonical
+        .file_name()
+        .map(|n| n.to_string_lossy().into_owned())
+        .unwrap_or_default();
+    let mime_type = super::protocol::get_mime_type(&file_name);
+
+    let mut file = match tokio::fs::File::open(&target_canonical).await {
+        Ok(f) => f,
+        Err(_) => return StatusCode::INTERNAL_SERVER_ERROR.into_response(),
+    };
+
+    let file_size = match file.metadata().await {
+        Ok(m) => m.len(),
+        Err(_) => return StatusCode::INTERNAL_SERVER_ERROR.into_response(),
+    };
+
+    // Check Range header
+    if let Some(range_header) = headers.get(header::RANGE).and_then(|v| v.to_str().ok()) {
+        if let Some(range_spec) = range_header.strip_prefix("bytes=") {
+            let parts: Vec<&str> = range_spec.split('-').collect();
+            let start = parts.first().and_then(|s| s.parse::<u64>().ok()).unwrap_or(0);
+            let end = parts
+                .get(1)
+                .filter(|s| !s.is_empty())
+                .and_then(|s| s.parse::<u64>().ok())
+                .unwrap_or(file_size.saturating_sub(1));
+
+            if start <= end && start < file_size {
+                let end = end.min(file_size - 1);
+                let chunk_len = end - start + 1;
+
+                if file.seek(std::io::SeekFrom::Start(start)).await.is_err() {
+                    return StatusCode::INTERNAL_SERVER_ERROR.into_response();
+                }
+
+                let reader = tokio_util::io::ReaderStream::new(file.take(chunk_len));
+                let body = Body::from_stream(reader);
+
+                return Response::builder()
+                    .status(StatusCode::PARTIAL_CONTENT)
+                    .header(header::CONTENT_TYPE, mime_type)
+                    .header(header::CONTENT_LENGTH, chunk_len.to_string())
+                    .header(
+                        header::CONTENT_RANGE,
+                        format!("bytes {}-{}/{}", start, end, file_size),
+                    )
+                    .header(header::ACCEPT_RANGES, "bytes")
+                    .body(body)
+                    .unwrap_or_else(|_| StatusCode::INTERNAL_SERVER_ERROR.into_response());
+            }
+        }
+    }
+
+    // No Range header or invalid range -> Send entire file
+    let reader = tokio_util::io::ReaderStream::new(file);
+    let body = Body::from_stream(reader);
+
+    Response::builder()
+        .status(StatusCode::OK)
+        .header(header::CONTENT_TYPE, mime_type)
+        .header(header::CONTENT_LENGTH, file_size.to_string())
+        .header(header::ACCEPT_RANGES, "bytes")
+        .body(body)
+        .unwrap_or_else(|_| StatusCode::INTERNAL_SERVER_ERROR.into_response())
+}
+
+async fn handle_shared_download(
+    State(state): State<Arc<ServerState>>,
+    Path((folder_id, subpath)): Path<(String, String)>,
+    Query(params): Query<SharedStreamQuery>,
+) -> Response {
+    let shares = state.shared_folders.read().await;
+    let folder = match shares.iter().find(|s| s.id == folder_id) {
+        Some(f) => f.clone(),
+        None => return StatusCode::NOT_FOUND.into_response(),
+    };
+    drop(shares);
+
+    if let Some(expected_pin) = &folder.pin {
+        if params.pin.as_deref() != Some(expected_pin.as_str()) {
+            return StatusCode::FORBIDDEN.into_response();
+        }
+    }
+
+    let base_canonical = match folder.path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => return StatusCode::NOT_FOUND.into_response(),
+    };
+
+    let clean_sub = subpath.trim_start_matches('/').trim_start_matches('\\');
+    let target_path = if clean_sub.is_empty() {
+        base_canonical.clone()
+    } else {
+        base_canonical.join(clean_sub)
+    };
+
+    let target_canonical = match target_path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => return StatusCode::NOT_FOUND.into_response(),
+    };
+
+    if !target_canonical.starts_with(&base_canonical) {
+        return StatusCode::FORBIDDEN.into_response();
+    }
+
+    let file_name = target_canonical
+        .file_name()
+        .map(|n| n.to_string_lossy().into_owned())
+        .unwrap_or_else(|| "download".to_string());
+
+    if target_canonical.is_file() {
+        let file = match tokio::fs::File::open(&target_canonical).await {
+            Ok(f) => f,
+            Err(_) => return StatusCode::INTERNAL_SERVER_ERROR.into_response(),
+        };
+        let file_size = file.metadata().await.map(|m| m.len()).unwrap_or(0);
+        let mime_type = super::protocol::get_mime_type(&file_name);
+        let reader = tokio_util::io::ReaderStream::new(file);
+        let body = Body::from_stream(reader);
+
+        Response::builder()
+            .status(StatusCode::OK)
+            .header(header::CONTENT_TYPE, mime_type)
+            .header(header::CONTENT_LENGTH, file_size.to_string())
+            .header(
+                header::CONTENT_DISPOSITION,
+                format!("attachment; filename=\"{}\"", file_name),
+            )
+            .body(body)
+            .unwrap_or_else(|_| StatusCode::INTERNAL_SERVER_ERROR.into_response())
+    } else if target_canonical.is_dir() {
+        let temp_zip = std::env::temp_dir().join(format!("zerosend_{}_{}.zip", folder_id, Uuid::new_v4()));
+        let target_clone = target_canonical.clone();
+        let temp_zip_clone = temp_zip.clone();
+
+        let zip_res = tokio::task::spawn_blocking(move || {
+            let zip_file = std::fs::File::create(&temp_zip_clone)?;
+            let mut zip = zip::ZipWriter::new(zip_file);
+            let options = zip::write::SimpleFileOptions::default()
+                .compression_method(zip::CompressionMethod::Deflated);
+
+            let walker = walkdir::WalkDir::new(&target_clone);
+            for entry in walker.into_iter().filter_map(|e| e.ok()) {
+                let path = entry.path();
+                let rel_path = path.strip_prefix(&target_clone).unwrap_or(path);
+                let rel_str = rel_path.to_string_lossy().replace('\\', "/");
+
+                if rel_str.is_empty() {
+                    continue;
+                }
+
+                if entry.file_type().is_dir() {
+                    zip.add_directory(&rel_str, options)?;
+                } else if entry.file_type().is_file() {
+                    zip.start_file(&rel_str, options)?;
+                    let mut f = std::fs::File::open(path)?;
+                    std::io::copy(&mut f, &mut zip)?;
+                }
+            }
+            zip.finish()?;
+            Ok::<(), std::io::Error>(())
+        })
+        .await;
+
+        if zip_res.is_err() || zip_res.unwrap().is_err() {
+            return StatusCode::INTERNAL_SERVER_ERROR.into_response();
+        }
+
+        let zip_file = match tokio::fs::File::open(&temp_zip).await {
+            Ok(f) => f,
+            Err(_) => return StatusCode::INTERNAL_SERVER_ERROR.into_response(),
+        };
+        let file_size = zip_file.metadata().await.map(|m| m.len()).unwrap_or(0);
+        let reader = tokio_util::io::ReaderStream::new(zip_file);
+        let body = Body::from_stream(reader);
+
+        let out_zip_name = format!("{}.zip", file_name);
+
+        Response::builder()
+            .status(StatusCode::OK)
+            .header(header::CONTENT_TYPE, "application/zip")
+            .header(header::CONTENT_LENGTH, file_size.to_string())
+            .header(
+                header::CONTENT_DISPOSITION,
+                format!("attachment; filename=\"{}\"", out_zip_name),
+            )
+            .body(body)
+            .unwrap_or_else(|_| StatusCode::INTERNAL_SERVER_ERROR.into_response())
+    } else {
+        StatusCode::NOT_FOUND.into_response()
+    }
+}
+
+async fn handle_shared_upload(
+    State(state): State<Arc<ServerState>>,
+    Path((folder_id, subpath)): Path<(String, String)>,
+    Query(params): Query<SharedStreamQuery>,
+    mut multipart: Multipart,
+) -> Response {
+    let shares = state.shared_folders.read().await;
+    let folder = match shares.iter().find(|s| s.id == folder_id) {
+        Some(f) => f.clone(),
+        None => {
+            return (
+                StatusCode::NOT_FOUND,
+                Json(serde_json::json!({ "error": "Shared folder not found" })),
+            )
+                .into_response()
+        }
+    };
+    drop(shares);
+
+    if folder.read_only {
+        return (
+            StatusCode::FORBIDDEN,
+            Json(serde_json::json!({ "error": "Shared folder is Read-Only. Uploading is disabled." })),
+        )
+            .into_response();
+    }
+
+    if let Some(expected_pin) = &folder.pin {
+        if params.pin.as_deref() != Some(expected_pin.as_str()) {
+            return (
+                StatusCode::FORBIDDEN,
+                Json(serde_json::json!({ "error": "Incorrect or missing PIN code" })),
+            )
+                .into_response();
+        }
+    }
+
+    let base_canonical = match folder.path.canonicalize() {
+        Ok(p) => p,
+        Err(_) => {
+            return (
+                StatusCode::NOT_FOUND,
+                Json(serde_json::json!({ "error": "Base path not found" })),
+            )
+                .into_response()
+        }
+    };
+
+    let clean_sub = subpath.trim_start_matches('/').trim_start_matches('\\');
+    let target_dir = if clean_sub.is_empty() {
+        base_canonical.clone()
+    } else {
+        base_canonical.join(clean_sub)
+    };
+
+    let mut written_bytes = 0u64;
+    let mut last_file = String::new();
+
+    while let Ok(Some(mut field)) = multipart.next_field().await {
+        let file_name = field.file_name().unwrap_or("uploaded_file").to_string();
+        let safe_name = std::path::Path::new(&file_name)
+            .file_name()
+            .map(|f| f.to_string_lossy().into_owned())
+            .unwrap_or_else(|| "uploaded_file".to_string());
+
+        let target_file_path = target_dir.join(&safe_name);
+        if let Ok(mut file) = File::create(&target_file_path).await {
+            while let Ok(Some(chunk)) = field.chunk().await {
+                let _ = file.write_all(&chunk).await;
+                written_bytes += chunk.len() as u64;
+            }
+            let _ = file.flush().await;
+            last_file = safe_name;
+        }
+    }
+
+    Json(SharedUploadResponse {
+        status: "success".to_string(),
+        filename: last_file,
+        bytes_written: written_bytes,
+    })
+    .into_response()
+}
+
+async fn handle_web_ui(State(state): State<Arc<ServerState>>) -> Html<String> {
+    let html = format!(
+        r###"<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
+    <meta name="theme-color" content="#090d16">
+    <meta name="mobile-web-app-capable" content="yes">
+    <meta name="apple-mobile-web-app-capable" content="yes">
+    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+    <meta name="apple-mobile-web-app-title" content="ZeroSend">
+    <link rel="manifest" href="/manifest.json">
+    <title>ZeroSend • {device_name}</title>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;600&display=swap" rel="stylesheet">
+    <style>
+        :root {{
+            --bg: #090d16;
+            --card: rgba(18, 24, 38, 0.92);
+            --card-border: rgba(255, 255, 255, 0.08);
+            --primary: #3b82f6;
+            --primary-glow: rgba(59, 130, 246, 0.35);
+            --primary-hover: #2563eb;
+            --success: #10b981;
+            --danger: #ef4444;
+            --text-main: #f8fafc;
+            --text-muted: #94a3b8;
+            --radius: 20px;
+        }}
+        * {{
+            box-sizing: border-box;
+            margin: 0;
+            padding: 0;
+            font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            -webkit-tap-highlight-color: transparent;
+        }}
+        body {{
+            background: var(--bg);
+            color: var(--text-main);
+            min-height: 100vh;
+            min-height: 100dvh;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            padding: 16px;
+            padding-bottom: max(16px, env(safe-area-inset-bottom));
+            background-image: 
+                radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.15) 0%, transparent 45%),
+                radial-gradient(circle at 90% 90%, rgba(139, 92, 246, 0.15) 0%, transparent 45%);
+            background-attachment: fixed;
+        }}
+        .container {{
+            max-width: 520px;
+            width: 100%;
+            background: var(--card);
+            backdrop-filter: blur(28px);
+            -webkit-backdrop-filter: blur(28px);
+            border: 1px solid var(--card-border);
+            border-radius: var(--radius);
+            padding: 24px;
+            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 40px rgba(59, 130, 246, 0.08);
+            animation: fadeIn 0.35s ease-out;
+        }}
+        @keyframes fadeIn {{ from {{ opacity: 0; transform: translateY(8px); }} to {{ opacity: 1; transform: translateY(0); }} }}
+        
+        .pwa-banner {{
+            display: none;
+            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
+            border: 1px solid rgba(59, 130, 246, 0.35);
+            border-radius: 12px;
+            padding: 10px 14px;
+            margin-bottom: 16px;
+            align-items: center;
+            justify-content: space-between;
+            gap: 10px;
+        }}
+        .pwa-banner-text {{ font-size: 12px; font-weight: 600; color: #93c5fd; }}
+        .pwa-install-btn {{
+            background: var(--primary);
+            color: #fff;
+            border: none;
+            border-radius: 8px;
+            padding: 6px 12px;
+            font-size: 11px;
+            font-weight: 700;
+            cursor: pointer;
+            flex-shrink: 0;
+        }}
+
+        .header {{
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+            margin-bottom: 20px;
+        }}
+        .brand {{ display: flex; align-items: center; gap: 12px; }}
+        .brand-icon {{
+            width: 44px;
+            height: 44px;
+            background: linear-gradient(135deg, #3b82f6, #8b5cf6);
+            border-radius: 12px;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            font-size: 22px;
+            box-shadow: 0 8px 16px var(--primary-glow);
+            flex-shrink: 0;
+        }}
+        .brand-text h1 {{ font-size: 19px; font-weight: 800; letter-spacing: -0.5px; line-height: 1.2; }}
+        .brand-text p {{ font-size: 12px; color: var(--text-muted); }}
+        
+        .badge {{
+            background: rgba(59, 130, 246, 0.15);
+            border: 1px solid rgba(59, 130, 246, 0.3);
+            color: #60a5fa;
+            padding: 5px 10px;
+            border-radius: 100px;
+            font-size: 10px;
+            font-weight: 700;
+            text-transform: uppercase;
+            letter-spacing: 0.5px;
+            flex-shrink: 0;
+        }}
+
+        .tabs {{
+            display: flex;
+            background: rgba(15, 23, 42, 0.6);
+            border: 1px solid var(--card-border);
+            border-radius: 12px;
+            padding: 4px;
+            margin-bottom: 20px;
+            gap: 4px;
+        }}
+        .tab-btn {{
+            flex: 1;
+            padding: 10px 4px;
+            border: none;
+            background: transparent;
+            color: var(--text-muted);
+            font-weight: 600;
+            font-size: 12px;
+            border-radius: 8px;
+            cursor: pointer;
+            transition: all 0.2s;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            gap: 4px;
+            touch-action: manipulation;
+        }}
+        .tab-btn.active {{
+            background: var(--primary);
+            color: #fff;
+            box-shadow: 0 4px 12px var(--primary-glow);
+        }}
+
+        /* Mobile Action Chips */
+        .action-chips {{
+            display: grid;
+            grid-template-columns: 1fr 1fr 1fr;
+            gap: 8px;
+            margin-bottom: 16px;
+        }}
+        .action-chip {{
+            background: rgba(30, 41, 59, 0.7);
+            border: 1px solid var(--card-border);
+            border-radius: 12px;
+            padding: 10px 8px;
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+            justify-content: center;
+            gap: 6px;
+            cursor: pointer;
+            transition: 0.2s;
+            touch-action: manipulation;
+            text-align: center;
+        }}
+        .action-chip:active {{ transform: scale(0.96); background: rgba(59, 130, 246, 0.15); }}
+        .action-chip span.icon {{ font-size: 20px; }}
+        .action-chip span.label {{ font-size: 11px; font-weight: 700; color: var(--text-main); }}
+
+        /* Voice Recorder Widget */
+        .voice-panel {{
+            display: none;
+            background: rgba(30, 41, 59, 0.85);
+            border: 1px solid rgba(239, 68, 68, 0.4);
+            border-radius: 14px;
+            padding: 14px;
+            margin-bottom: 16px;
+            animation: fadeIn 0.2s;
+        }}
+        .voice-header {{
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+            margin-bottom: 10px;
+        }}
+        .pulse-dot {{
+            width: 10px;
+            height: 10px;
+            background: #ef4444;
+            border-radius: 50%;
+            display: inline-block;
+            box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
+            animation: pulse 1.2s infinite;
+            margin-right: 6px;
+        }}
+        @keyframes pulse {{
+            0% {{ box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }}
+            70% {{ box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }}
+            100% {{ box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }}
+        }}
+        .voice-timer {{ font-family: 'JetBrains Mono', monospace; font-size: 15px; font-weight: 700; color: #f87171; }}
+        .voice-bars {{
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            gap: 4px;
+            height: 24px;
+            margin-bottom: 12px;
+        }}
+        .voice-bar {{
+            width: 4px;
+            height: 8px;
+            background: #60a5fa;
+            border-radius: 2px;
+            animation: soundWave 0.6s infinite alternate ease-in-out;
+        }}
+        .voice-bar:nth-child(2) {{ animation-delay: 0.15s; height: 16px; }}
+        .voice-bar:nth-child(3) {{ animation-delay: 0.3s; height: 22px; }}
+        .voice-bar:nth-child(4) {{ animation-delay: 0.45s; height: 12px; }}
+        .voice-bar:nth-child(5) {{ animation-delay: 0.2s; height: 18px; }}
+        @keyframes soundWave {{ from {{ transform: scaleY(0.4); }} to {{ transform: scaleY(1.3); }} }}
+        .voice-actions {{ display: flex; gap: 8px; }}
+        .voice-btn {{
+            flex: 1;
+            padding: 8px;
+            border: none;
+            border-radius: 8px;
+            font-size: 12px;
+            font-weight: 700;
+            cursor: pointer;
+        }}
+
+        .dropzone {{
+            border: 2px dashed rgba(255, 255, 255, 0.15);
+            border-radius: 16px;
+            padding: 26px 16px;
+            text-align: center;
+            cursor: pointer;
+            transition: all 0.2s ease;
+            background: rgba(15, 23, 42, 0.4);
+            margin-bottom: 16px;
+            touch-action: manipulation;
+        }}
+        .dropzone:hover, .dropzone.dragover {{
+            border-color: var(--primary);
+            background: rgba(59, 130, 246, 0.08);
+        }}
+        .dropzone svg {{
+            width: 38px;
+            height: 38px;
+            fill: var(--primary);
+            margin-bottom: 8px;
+            filter: drop-shadow(0 4px 10px var(--primary-glow));
+        }}
+        .dropzone h3 {{ font-size: 15px; font-weight: 700; margin-bottom: 4px; }}
+        .dropzone p {{ font-size: 12px; color: var(--text-muted); }}
+
+        /* Thumbnails Gallery */
+        .thumb-gallery {{
+            display: grid;
+            grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
+            gap: 8px;
+            margin-bottom: 12px;
+        }}
+        .thumb-item {{
+            position: relative;
+            width: 100%;
+            aspect-ratio: 1;
+            border-radius: 8px;
+            overflow: hidden;
+            border: 1px solid var(--card-border);
+            background: #000;
+        }}
+        .thumb-img {{
+            width: 100%;
+            height: 100%;
+            object-fit: cover;
+            display: block;
+        }}
+        .thumb-remove {{
+            position: absolute;
+            top: 2px;
+            right: 2px;
+            background: rgba(0, 0, 0, 0.7);
+            color: #fff;
+            width: 18px;
+            height: 18px;
+            border-radius: 50%;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            font-size: 10px;
+            font-weight: bold;
+            cursor: pointer;
+        }}
+
+        .file-list {{
+            max-height: 200px;
+            overflow-y: auto;
+            margin-bottom: 16px;
+            display: flex;
+            flex-direction: column;
+            gap: 8px;
+        }}
+        .file-item {{
+            background: rgba(30, 41, 59, 0.7);
+            border: 1px solid var(--card-border);
+            border-radius: 10px;
+            padding: 8px 12px;
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+            font-size: 13px;
+        }}
+        .file-info {{ display: flex; align-items: center; gap: 8px; overflow: hidden; }}
+        .file-cat-badge {{
+            font-size: 9px;
+            font-weight: 800;
+            padding: 2px 6px;
+            border-radius: 4px;
+            text-transform: uppercase;
+            flex-shrink: 0;
+        }}
+        .file-name {{ font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 190px; }}
+        .file-size {{ color: var(--text-muted); font-size: 11px; flex-shrink: 0; }}
+
+        .btn {{
+            width: 100%;
+            min-height: 48px;
+            padding: 14px 20px;
+            border: none;
+            border-radius: 12px;
+            background: linear-gradient(135deg, var(--primary), #2563eb);
+            color: #fff;
+            font-size: 15px;
+            font-weight: 700;
+            cursor: pointer;
+            transition: 0.2s;
+            box-shadow: 0 8px 20px var(--primary-glow);
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            gap: 8px;
+            touch-action: manipulation;
+        }}
+        .btn:hover {{ filter: brightness(1.08); }}
+        .btn:active {{ transform: scale(0.98); }}
+        .btn:disabled {{ opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }}
+
+        .progress-wrapper {{
+            margin-top: 16px;
+            display: none;
+        }}
+        .progress-info {{
+            display: flex;
+            justify-content: space-between;
+            font-size: 12px;
+            font-weight: 700;
+            color: var(--text-muted);
+            margin-bottom: 8px;
+        }}
+        .progress-bar {{
+            height: 10px;
+            background: rgba(255, 255, 255, 0.08);
+            border-radius: 100px;
+            overflow: hidden;
+        }}
+        .progress-fill {{
+            height: 100%;
+            width: 0%;
+            background: linear-gradient(90deg, #38bdf8, #10b981);
+            border-radius: 100px;
+            transition: width 0.15s ease;
+        }}
+
+        textarea {{
+            width: 100%;
+            height: 130px;
+            background: rgba(15, 23, 42, 0.6);
+            border: 1px solid var(--card-border);
+            border-radius: 12px;
+            padding: 14px;
+            color: var(--text-main);
+            font-size: 14px;
+            resize: none;
+            margin-bottom: 12px;
+            outline: none;
+            transition: 0.2s;
+        }}
+        textarea:focus {{ border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15); }}
+
+        .toast {{
+            margin-top: 14px;
+            padding: 12px;
+            border-radius: 10px;
+            font-size: 13px;
+            font-weight: 600;
+            text-align: center;
+            display: none;
+            animation: fadeIn 0.3s;
+        }}
+        .toast.success {{ background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }}
+        .toast.error {{ background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.3); }}
+        
+        .footer {{
+            margin-top: 20px;
+            text-align: center;
+            font-size: 11px;
+            color: rgba(255, 255, 255, 0.35);
+        }}
+
+        .dl-card {{
+            background: rgba(30, 41, 59, 0.7);
+            border: 1px solid var(--card-border);
+            border-radius: 12px;
+            padding: 12px 14px;
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+            gap: 10px;
+        }}
+        .dl-btn {{
+            background: linear-gradient(135deg, #10b981, #059669);
+            color: white;
+            padding: 8px 14px;
+            border-radius: 8px;
+            text-decoration: none;
+            font-size: 12px;
+            font-weight: 700;
+            display: inline-flex;
+            align-items: center;
+            gap: 4px;
+            flex-shrink: 0;
+            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
+        }}
+
+        @media (max-width: 480px) {{
+            body {{ padding: 10px; }}
+            .container {{ padding: 18px; border-radius: 16px; }}
+            .brand-text h1 {{ font-size: 17px; }}
+            .file-name {{ max-width: 140px; }}
+        }}
+    </style>
+</head>
+<body>
+    <div class="container">
+        <!-- PWA Install Banner -->
+        <div class="pwa-banner" id="pwaBanner">
+            <span class="pwa-banner-text">📲 Install ZeroSend App on home screen</span>
+            <button class="pwa-install-btn" id="pwaBtn" onclick="installPWA()">Install</button>
+        </div>
+
+        <div class="header">
+            <div class="brand">
+                <div class="brand-icon">⚡</div>
+                <div class="brand-text">
+                    <h1>ZeroSend</h1>
+                    <p>To: <strong>{device_name}</strong></p>
+                </div>
+            </div>
+            <div class="badge">{net_type}</div>
+        </div>
+
+        <div class="tabs">
+            <button class="tab-btn active" id="tabFilesBtn" onclick="switchTab('files')">📁 Send Files</button>
+            <button class="tab-btn" id="tabDlBtn" onclick="switchTab('download')">📥 PC Downloads</button>
+            <button class="tab-btn" id="tabSharedBtn" onclick="switchTab('shared')">🎬 Shared Media</button>
+            <button class="tab-btn" id="tabTextBtn" onclick="switchTab('text')">📋 Send Text</button>
+        </div>
+
+        <!-- Files View -->
+        <div id="viewFiles">
+            <div class="action-chips">
+                <div class="action-chip" onclick="document.getElementById('mediaInput').click()">
+                    <span class="icon">📸</span>
+                    <span class="label">Photos/Videos</span>
+                </div>
+                <div class="action-chip" onclick="document.getElementById('fileInput').click()">
+                    <span class="icon">📄</span>
+                    <span class="label">Documents</span>
+                </div>
+                <div class="action-chip" onclick="toggleVoiceRecorder()">
+                    <span class="icon">🎙️</span>
+                    <span class="label">Voice Note</span>
+                </div>
+            </div>
+
+            <!-- Voice Recording Panel -->
+            <div class="voice-panel" id="voicePanel">
+                <div class="voice-header">
+                    <div style="display:flex;align-items:center;">
+                        <span class="pulse-dot"></span>
+                        <span style="font-size:12px;font-weight:700;color:#f87171;">Recording Voice Note...</span>
+                    </div>
+                    <span class="voice-timer" id="voiceTimer">00:00</span>
+                </div>
+                <div class="voice-bars">
+                    <div class="voice-bar"></div>
+                    <div class="voice-bar"></div>
+                    <div class="voice-bar"></div>
+                    <div class="voice-bar"></div>
+                    <div class="voice-bar"></div>
+                </div>
+                <div class="voice-actions">
+                    <button class="voice-btn" style="background:#ef4444;color:#fff;" onclick="cancelVoiceRecording()">🗑️ Cancel</button>
+                    <button class="voice-btn" style="background:#10b981;color:#fff;" onclick="stopVoiceRecording()">⏹️ Done & Attach</button>
+                </div>
+            </div>
+
+            <div class="dropzone" id="dropzone" onclick="document.getElementById('fileInput').click()">
+                <svg viewBox="0 0 24 24"><path d="M19.35 10.04C18.67 6.59 15.64 4 12 4 9.11 4 6.6 5.64 5.35 8.04 2.34 8.36 0 10.91 0 14c0 3.31 2.69 6 6 6h13c2.76 0 5-2.24 5-5 0-2.64-2.05-4.78-4.65-4.96zM14 13v4h-4v-4H7l5-5 5 5h-3z"/></svg>
+                <h3>Tap or Drop files here</h3>
+                <p>High-speed direct P2P streaming with SHA-256 verification</p>
+            </div>
+
+            <input type="file" id="mediaInput" accept="image/*,video/*" multiple style="display:none">
+            <input type="file" id="fileInput" multiple style="display:none">
+
+            <!-- Thumbnails Gallery for Images -->
+            <div class="thumb-gallery" id="thumbGallery"></div>
+
+            <div class="file-list" id="fileList"></div>
+
+            <button class="btn" id="uploadBtn" onclick="uploadFiles()" disabled>
+                <span>🚀 Send to {device_name}</span>
+            </button>
+
+            <div class="progress-wrapper" id="progressWrapper">
+                <div class="progress-info">
+                    <span id="progressStatus">Uploading...</span>
+                    <span id="progressPct">0%</span>
+                </div>
+                <div class="progress-bar">
+                    <div class="progress-fill" id="progressFill"></div>
+                </div>
+            </div>
+        </div>
+
+        <!-- Download View -->
+        <div id="viewDownload" style="display:none">
+            <div style="margin-bottom:12px;font-size:13px;color:var(--text-muted);">
+                Files stored on <strong>{device_name}</strong> available for download:
+            </div>
+            <div class="file-list" id="pcFileList">
+                <div style="text-align:center;padding:24px;color:var(--text-muted);">Loading files...</div>
+            </div>
+        </div>
+
+        <!-- Shared Media View -->
+        <div id="viewShared" style="display:none">
+            <div style="margin-bottom:12px;font-size:13px;color:var(--text-muted);">
+                Shared folders and media from <strong>{device_name}</strong>:
+            </div>
+            <div class="file-list" id="sharedMediaList">
+                <div style="text-align:center;padding:24px;color:var(--text-muted);">Loading shared folders...</div>
+            </div>
+        </div>
+
+        <!-- Text View -->
+        <div id="viewText" style="display:none">
+            <textarea id="textInput" placeholder="Paste links, text snippets, notes, or coordinates to send directly to {device_name}..."></textarea>
+            <div style="display:flex;gap:8px;margin-bottom:12px;">
+                <button class="btn" style="flex:1;background:rgba(51,65,85,0.8);box-shadow:none;min-height:42px;padding:8px;" onclick="pasteClipboard()">
+                    <span>📋 Paste Clipboard</span>
+                </button>
+                <button class="btn" id="sendTextBtn" style="flex:2;min-height:42px;" onclick="sendQuickText()">
+                    <span>✉️ Send Text</span>
+                </button>
+            </div>
+        </div>
+
+        <div class="toast" id="toast"></div>
+
+        <div class="footer">
+            ZeroSend v2.4.1 • Ultra-fast P2P File & Text Sharing • 🛡️ SHA-256 Verified
+        </div>
+    </div>
+
+    <script>
+        let selectedFiles = [];
+        let deferredPrompt = null;
+        let mediaRecorder = null;
+        let audioChunks = [];
+        let recordInterval = null;
+        let recordStartTime = null;
+
+        window.addEventListener('beforeinstallprompt', (e) => {{
+            e.preventDefault();
+            deferredPrompt = e;
+            const banner = document.getElementById('pwaBanner');
+            if (banner) banner.style.display = 'flex';
+        }});
+
+        function installPWA() {{
+            if (deferredPrompt) {{
+                deferredPrompt.prompt();
+                deferredPrompt.userChoice.then(() => {{
+                    deferredPrompt = null;
+                    document.getElementById('pwaBanner').style.display = 'none';
+                }});
+            }}
+        }}
+
+        const fileInput = document.getElementById('fileInput');
+        const mediaInput = document.getElementById('mediaInput');
+        const dropzone = document.getElementById('dropzone');
+        const fileList = document.getElementById('fileList');
+        const thumbGallery = document.getElementById('thumbGallery');
+        const pcFileList = document.getElementById('pcFileList');
+        const sharedMediaList = document.getElementById('sharedMediaList');
+        const uploadBtn = document.getElementById('uploadBtn');
+        const toast = document.getElementById('toast');
+        const progressWrapper = document.getElementById('progressWrapper');
+        const progressFill = document.getElementById('progressFill');
+        const progressPct = document.getElementById('progressPct');
+        const progressStatus = document.getElementById('progressStatus');
+
+        function formatBytes(bytes) {{
+            if (bytes === 0) return '0 B';
+            const k = 1024;
+            const sizes = ['B', 'KB', 'MB', 'GB'];
+            const i = Math.floor(Math.log(bytes) / Math.log(k));
+            return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i];
+        }}
+
+        function getFileCategory(name) {{
+            const ext = name.split('.').pop().toLowerCase();
+            if (['mp4','mkv','avi','mov','webm'].includes(ext)) return {{ icon: '🎬', label: 'VIDEO', color: '#a855f7', bg: 'rgba(168,85,247,0.2)' }};
+            if (['jpg','jpeg','png','gif','webp','svg','heic'].includes(ext)) return {{ icon: '🖼️', label: 'IMAGE', color: '#38bdf8', bg: 'rgba(56,189,248,0.2)' }};
+            if (['mp3','flac','wav','ogg','m4a'].includes(ext)) return {{ icon: '🎵', label: 'AUDIO', color: '#ec4899', bg: 'rgba(236,72,153,0.2)' }};
+            if (['zip','rar','7z','tar','gz'].includes(ext)) return {{ icon: '📦', label: 'ARCHIVE', color: '#f59e0b', bg: 'rgba(245,158,11,0.2)' }};
+            if (['pdf','doc','docx','txt','md','xlsx'].includes(ext)) return {{ icon: '📄', label: 'DOC', color: '#3b82f6', bg: 'rgba(59,130,246,0.2)' }};
+            return {{ icon: '💾', label: 'FILE', color: '#94a3b8', bg: 'rgba(148,163,184,0.2)' }};
+        }}
+
+        function switchTab(tab) {{
+            document.getElementById('viewFiles').style.display = tab === 'files' ? 'block' : 'none';
+            document.getElementById('viewDownload').style.display = tab === 'download' ? 'block' : 'none';
+            document.getElementById('viewShared').style.display = tab === 'shared' ? 'block' : 'none';
+            document.getElementById('viewText').style.display = tab === 'text' ? 'block' : 'none';
+            document.getElementById('tabFilesBtn').className = 'tab-btn ' + (tab === 'files' ? 'active' : '');
+            document.getElementById('tabDlBtn').className = 'tab-btn ' + (tab === 'download' ? 'active' : '');
+            document.getElementById('tabSharedBtn').className = 'tab-btn ' + (tab === 'shared' ? 'active' : '');
+            document.getElementById('tabTextBtn').className = 'tab-btn ' + (tab === 'text' ? 'active' : '');
+            hideToast();
+
+            if (tab === 'download') {{
+                loadPcFiles();
+            }} else if (tab === 'shared') {{
+                loadSharedMedia();
+            }}
+        }}
+
+        function loadSharedMedia() {{
+            fetch('/api/shared/list')
+                .then(r => r.json())
+                .then(shares => {{
+                    sharedMediaList.innerHTML = '';
+                    if (!shares.length) {{
+                        sharedMediaList.innerHTML = '<div style="text-align:center;padding:24px;color:var(--text-muted);">No shared folders configured on PC</div>';
+                        return;
+                    }}
+                    shares.forEach(s => {{
+                        const div = document.createElement('div');
+                        div.className = 'dl-card';
+                        div.innerHTML = `
+                            <div style="display:flex;align-items:center;gap:10px;overflow:hidden;">
+                                <span style="font-size:22px;">📁</span>
+                                <div style="overflow:hidden;">
+                                    <div class="file-name" style="max-width:180px;font-weight:700;">${{s.name}}</div>
+                                    <div class="file-size">${{s.total_files}} items • ${{formatBytes(s.total_bytes)}}</div>
+                                </div>
+                            </div>
+                            <button class="dl-btn" onclick="openSharedFolder('${{s.id}}', '${{encodeURIComponent(s.name)}}')">Browse 📂</button>
+                        `;
+                        sharedMediaList.appendChild(div);
+                    }});
+                }})
+                .catch(e => {{
+                    sharedMediaList.innerHTML = '<div style="color:#ef4444;text-align:center;padding:20px;">Failed to load shared folders</div>';
+                }});
+        }}
+
+        function openSharedFolder(folderId, folderName) {{
+            fetch(`/api/shared/tree/${{folderId}}`)
+                .then(r => r.json())
+                .then(tree => {{
+                    sharedMediaList.innerHTML = `
+                        <div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;">
+                            <button class="dl-btn" style="background:#334155;" onclick="loadSharedMedia()">⬅️ All Folders</button>
+                            <span style="font-size:13px;font-weight:700;">${{decodeURIComponent(folderName)}}</span>
+                        </div>
+                    `;
+                    if (!tree.entries || !tree.entries.length) {{
+                        sharedMediaList.innerHTML += '<div style="text-align:center;padding:20px;color:var(--text-muted);">Folder is empty</div>';
+                        return;
+                    }}
+                    tree.entries.forEach(item => {{
+                        const cat = getFileCategory(item.name);
+                        const isMedia = cat.label === 'VIDEO' || cat.label === 'AUDIO';
+                        const streamUrl = `/api/shared/stream/${{folderId}}/${{encodeURIComponent(item.relative_path)}}`;
+                        const dlUrl = `/api/shared/download/${{folderId}}/${{encodeURIComponent(item.relative_path)}}`;
+
+                        const div = document.createElement('div');
+                        div.className = 'dl-card';
+                        div.innerHTML = `
+                            <div style="display:flex;align-items:center;gap:10px;overflow:hidden;">
+                                <span style="font-size:20px;">${{item.is_dir ? '📁' : cat.icon}}</span>
+                                <div style="overflow:hidden;">
+                                    <div class="file-name" style="max-width:160px;">${{item.name}}</div>
+                                    <div class="file-size">${{item.is_dir ? 'Folder' : formatBytes(item.size)}}</div>
+                                </div>
+                            </div>
+                            <div style="display:flex;gap:6px;">
+                                ${{isMedia ? `<a class="dl-btn" style="background:#a855f7;" href="${{streamUrl}}" target="_blank">▶️ Play</a>` : ''}}
+                                <a class="dl-btn" href="${{dlUrl}}" download>${{item.is_dir ? '⬇️ Zip' : '⬇️ Save'}}</a>
+                            </div>
+                        `;
+                        sharedMediaList.appendChild(div);
+                    }});
+                }})
+                .catch(e => {{
+                    showToast('Failed to browse folder', true);
+                }});
+        }}
+
+        function loadPcFiles() {{
+            fetch('/api/web/files')
+                .then(r => r.json())
+                .then(files => {{
+                    pcFileList.innerHTML = '';
+                    if (!files.length) {{
+                        pcFileList.innerHTML = '<div style="text-align:center;padding:24px;color:var(--text-muted);">No files currently in PC download folder</div>';
+                        return;
+                    }}
+                    files.forEach(f => {{
+                        const cat = getFileCategory(f.name);
+                        const div = document.createElement('div');
+                        div.className = 'dl-card';
+                        div.innerHTML = `
+                            <div style="display:flex;align-items:center;gap:10px;overflow:hidden;">
+                                <span style="font-size:20px;">${{cat.icon}}</span>
+                                <div style="overflow:hidden;">
+                                    <div class="file-name" style="max-width:180px;">${{f.name}}</div>
+                                    <div class="file-size">${{formatBytes(f.size)}}</div>
+                                </div>
+                            </div>
+                            <a class="dl-btn" href="/api/web/download/${{encodeURIComponent(f.name)}}" download>⬇️ Download</a>
+                        `;
+                        pcFileList.appendChild(div);
+                    }});
+                }})
+                .catch(e => {{
+                    pcFileList.innerHTML = '<div style="color:#ef4444;text-align:center;padding:20px;">Failed to load files from PC</div>';
+                }});
+        }}
+
+        function showToast(msg, isError = false) {{
+            toast.innerText = msg;
+            toast.className = 'toast ' + (isError ? 'error' : 'success');
+            toast.style.display = 'block';
+            if (!isError && navigator.vibrate) {{
+                navigator.vibrate([40, 60, 40]);
+            }}
+        }}
+        function hideToast() {{ toast.style.display = 'none'; }}
+
+        fileInput.addEventListener('change', (e) => handleFiles(Array.from(e.target.files)));
+        mediaInput.addEventListener('change', (e) => handleFiles(Array.from(e.target.files)));
+
+        dropzone.addEventListener('dragover', (e) => {{ e.preventDefault(); dropzone.classList.add('dragover'); }});
+        dropzone.addEventListener('dragleave', () => {{ dropzone.classList.remove('dragover'); }});
+        dropzone.addEventListener('drop', (e) => {{
+            e.preventDefault();
+            dropzone.classList.remove('dragover');
+            handleFiles(Array.from(e.dataTransfer.files));
+        }});
+
+        function handleFiles(files) {{
+            selectedFiles = [...selectedFiles, ...files];
+            renderFileList();
+        }}
+
+        function renderFileList() {{
+            fileList.innerHTML = '';
+            thumbGallery.innerHTML = '';
+            let total = 0;
+
+            selectedFiles.forEach((file, idx) => {{
+                total += file.size;
+                const cat = getFileCategory(file.name);
+
+                // If image, render thumbnail preview
+                if (file.type.startsWith('image/')) {{
+                    const thumbDiv = document.createElement('div');
+                    thumbDiv.className = 'thumb-item';
+                    const imgUrl = URL.createObjectURL(file);
+                    thumbDiv.innerHTML = `
+                        <img src="${{imgUrl}}" class="thumb-img" alt="${{file.name}}">
+                        <div class="thumb-remove" onclick="removeFile(${{idx}})">✕</div>
+                    `;
+                    thumbGallery.appendChild(thumbDiv);
+                }}
+
+                const item = document.createElement('div');
+                item.className = 'file-item';
+                item.innerHTML = `
+                    <div class="file-info">
+                        <span style="font-size:16px;">${{cat.icon}}</span>
+                        <span class="file-cat-badge" style="color:${{cat.color}};background:${{cat.bg}};">${{cat.label}}</span>
+                        <span class="file-name">${{file.name}}</span>
+                        <span class="file-size">(${{formatBytes(file.size)}})</span>
+                    </div>
+                    <span style="cursor:pointer;color:#ef4444;font-weight:bold;padding:4px 8px;font-size:15px;" onclick="removeFile(${{idx}})">✕</span>
+                `;
+                fileList.appendChild(item);
+            }});
+
+            uploadBtn.disabled = selectedFiles.length === 0;
+            if (selectedFiles.length > 0) {{
+                uploadBtn.querySelector('span').innerText = `🚀 Send ${{selectedFiles.length}} Item(s) (${{formatBytes(total)}})`;
+            }} else {{
+                uploadBtn.querySelector('span').innerText = `🚀 Send to {device_name}`;
+            }}
+        }}
+
+        function removeFile(idx) {{
+            selectedFiles.splice(idx, 1);
+            renderFileList();
+        }}
+
+        /* Voice Recording Engine */
+        async function toggleVoiceRecorder() {{
+            const panel = document.getElementById('voicePanel');
+            if (panel.style.display === 'block') {{
+                cancelVoiceRecording();
+                return;
+            }}
+
+            try {{
+                const stream = await navigator.mediaDevices.getUserMedia({{ audio: true }});
+                mediaRecorder = new MediaRecorder(stream);
+                audioChunks = [];
+
+                mediaRecorder.ondataavailable = (e) => {{
+                    if (e.data.size > 0) audioChunks.push(e.data);
+                }};
+
+                mediaRecorder.onstop = () => {{
+                    const audioBlob = new Blob(audioChunks, {{ type: 'audio/webm' }});
+                    const now = new Date();
+                    const timeStr = now.getFullYear() + '' +
+                        String(now.getMonth()+1).padStart(2,'0') + '' +
+                        String(now.getDate()).padStart(2,'0') + '_' +
+                        String(now.getHours()).padStart(2,'0') + '' +
+                        String(now.getMinutes()).padStart(2,'0') + '' +
+                        String(now.getSeconds()).padStart(2,'0');
+                    const voiceFile = new File([audioBlob], `Voice_Note_${{timeStr}}.webm`, {{ type: 'audio/webm' }});
+                    handleFiles([voiceFile]);
+                    stream.getTracks().forEach(track => track.stop());
+                }};
+
+                mediaRecorder.start();
+                panel.style.display = 'block';
+                recordStartTime = Date.now();
+                recordInterval = setInterval(updateVoiceTimer, 1000);
+            }} catch (e) {{
+                showToast('Microphone access denied or unsupported: ' + e.message, true);
+            }}
+        }}
+
+        function updateVoiceTimer() {{
+            const diff = Math.floor((Date.now() - recordStartTime) / 1000);
+            const m = String(Math.floor(diff / 60)).padStart(2, '0');
+            const s = String(diff % 60).padStart(2, '0');
+            document.getElementById('voiceTimer').innerText = `${{m}}:${{s}}`;
+        }}
+
+        function stopVoiceRecording() {{
+            if (mediaRecorder && mediaRecorder.state !== 'inactive') {{
+                mediaRecorder.stop();
+            }}
+            clearInterval(recordInterval);
+            document.getElementById('voicePanel').style.display = 'none';
+            document.getElementById('voiceTimer').innerText = '00:00';
+            showToast('🎙️ Voice note attached to upload queue!');
+        }}
+
+        function cancelVoiceRecording() {{
+            if (mediaRecorder && mediaRecorder.state !== 'inactive') {{
+                mediaRecorder.onstop = null;
+                mediaRecorder.stop();
+            }}
+            clearInterval(recordInterval);
+            document.getElementById('voicePanel').style.display = 'none';
+            document.getElementById('voiceTimer').innerText = '00:00';
+        }}
+
+        function uploadFiles() {{
+            if (!selectedFiles.length) return;
+            const formData = new FormData();
+            selectedFiles.forEach(f => formData.append('files', f));
+
+            progressWrapper.style.display = 'block';
+            progressFill.style.width = '0%';
+            progressPct.innerText = '0%';
+            progressStatus.innerText = '⏳ Connecting / waiting for confirmation...';
+            uploadBtn.disabled = true;
+            hideToast();
+
+            const xhr = new XMLHttpRequest();
+            const startTime = Date.now();
+            let lastLoaded = 0;
+            let lastTime = startTime;
+            let smoothedSpeed = 0;
+
+            xhr.open('POST', '/api/web/upload', true);
+
+            xhr.upload.onprogress = (e) => {{
+                if (e.lengthComputable) {{
+                    const pct = Math.round((e.loaded / e.total) * 100);
+                    progressFill.style.width = pct + '%';
+                    progressPct.innerText = pct + '%';
+
+                    const now = Date.now();
+                    const diffSecs = (now - lastTime) / 1000;
+                    if (diffSecs > 0.25) {{
+                        const instantSpeed = (e.loaded - lastLoaded) / diffSecs;
+                        smoothedSpeed = smoothedSpeed === 0 ? instantSpeed : (smoothedSpeed * 0.6 + instantSpeed * 0.4);
+                        const remainingBytes = e.total - e.loaded;
+                        const etaSecs = smoothedSpeed > 0 ? Math.round(remainingBytes / smoothedSpeed) : 0;
+                        const etaStr = etaSecs > 60 ? Math.ceil(etaSecs / 60) + 'm left' : etaSecs + 's left';
+
+                        progressStatus.innerText = `⚡ ${{formatBytes(smoothedSpeed)}}/s • ~${{etaStr}}`;
+                        lastLoaded = e.loaded;
+                        lastTime = now;
+                    }}
+                }}
+            }};
+
+            xhr.onload = () => {{
+                if (xhr.status === 200) {{
+                    showToast('🎉 All files delivered! 🛡️ SHA-256 Verified');
+                    selectedFiles = [];
+                    renderFileList();
+                    progressWrapper.style.display = 'none';
+                }} else if (xhr.status === 403) {{
+                    showToast('⛔ Transfer declined by PC user or timed out', true);
+                    uploadBtn.disabled = false;
+                    progressWrapper.style.display = 'none';
+                }} else {{
+                    showToast('Upload failed: ' + xhr.statusText, true);
+                    uploadBtn.disabled = false;
+                }}
+            }};
+
+            xhr.onerror = () => {{
+                showToast('Network error during upload', true);
+                uploadBtn.disabled = false;
+            }};
+
+            xhr.send(formData);
+        }}
+
+        async function pasteClipboard() {{
+            try {{
+                const text = await navigator.clipboard.readText();
+                if (text) {{
+                    document.getElementById('textInput').value = text;
+                    showToast('Pasted from clipboard!');
+                }}
+            }} catch (e) {{
+                showToast('Clipboard access denied. Please paste manually.', true);
+            }}
+        }}
+
+        function sendQuickText() {{
+            const text = document.getElementById('textInput').value.trim();
+            if (!text) {{
+                showToast('Please enter some text first', true);
+                return;
+            }}
+            const btn = document.getElementById('sendTextBtn');
+            btn.disabled = true;
+
+            fetch('/api/web/send-text', {{
+                method: 'POST',
+                headers: {{ 'Content-Type': 'application/json' }},
+                body: JSON.stringify({{ text }})
+            }})
+            .then(res => res.json())
+            .then(data => {{
+                btn.disabled = false;
+                if (data.status === 'success') {{
+                    showToast('🎉 Text delivered to PC!');
+                    document.getElementById('textInput').value = '';
+                }} else {{
+                    showToast('Failed to send text', true);
+                }}
+            }})
+            .catch(e => {{
+                btn.disabled = false;
+                showToast('Error sending text: ' + e, true);
+            }});
+        }}
+    </script>
+</body>
+</html>"###,
+        device_name = state.my_info.name,
+        net_type = state.my_info.net_type,
+    );
+
+    Html(html)
+}
diff --git a/src/transfer/text_analyzer.rs b/src/transfer/text_analyzer.rs
new file mode 100644
index 0000000..a86f18f
--- /dev/null
+++ b/src/transfer/text_analyzer.rs
@@ -0,0 +1,118 @@
+use serde::{Deserialize, Serialize};
+use std::net::{Ipv4Addr, SocketAddrV4};
+use std::str::FromStr;
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub enum ContentType {
+    IpAddress,
+    ServerAddress,
+    WebUrl,
+    Email,
+    JsonData,
+    CodeSnippet,
+    PlainText,
+}
+
+impl ContentType {
+    pub fn label(&self) -> &'static str {
+        match self {
+            ContentType::IpAddress => "📡 IP Address",
+            ContentType::ServerAddress => "🔌 Server Address (IP:Port)",
+            ContentType::WebUrl => "🌐 Web Link",
+            ContentType::Email => "✉️ Email Address",
+            ContentType::JsonData => "📦 JSON Data",
+            ContentType::CodeSnippet => "💻 Code Snippet",
+            ContentType::PlainText => "📝 Text Message",
+        }
+    }
+
+    pub fn badge_color_rgb(&self) -> (u8, u8, u8) {
+        match self {
+            ContentType::IpAddress => (34, 197, 94),    // Green
+            ContentType::ServerAddress => (168, 85, 247), // Purple
+            ContentType::WebUrl => (56, 189, 248),      // Cyan
+            ContentType::Email => (234, 179, 8),        // Yellow
+            ContentType::JsonData => (249, 115, 22),    // Orange
+            ContentType::CodeSnippet => (236, 72, 153), // Pink
+            ContentType::PlainText => (148, 163, 184),  // Gray
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AnalyzedText {
+    pub content: String,
+    pub content_type: ContentType,
+}
+
+/// Automatically detect the type of text content
+pub fn analyze_text(raw: &str) -> AnalyzedText {
+    let trimmed = raw.trim();
+
+    // 1. Check if IP:Port
+    if SocketAddrV4::from_str(trimmed).is_ok() {
+        return AnalyzedText {
+            content: trimmed.to_string(),
+            content_type: ContentType::ServerAddress,
+        };
+    }
+
+    // 2. Check if IPv4 Address
+    if Ipv4Addr::from_str(trimmed).is_ok() {
+        return AnalyzedText {
+            content: trimmed.to_string(),
+            content_type: ContentType::IpAddress,
+        };
+    }
+
+    // 3. Check if URL
+    if trimmed.starts_with("http://")
+        || trimmed.starts_with("https://")
+        || trimmed.starts_with("www.")
+        || (trimmed.contains('.') && (trimmed.ends_with(".com") || trimmed.ends_with(".ru") || trimmed.ends_with(".org") || trimmed.ends_with(".net") || trimmed.ends_with(".io") || trimmed.ends_with(".dev")))
+    {
+        return AnalyzedText {
+            content: trimmed.to_string(),
+            content_type: ContentType::WebUrl,
+        };
+    }
+
+    // 4. Check if Email
+    if trimmed.contains('@') && trimmed.contains('.') && !trimmed.contains(' ') && trimmed.len() > 5 {
+        return AnalyzedText {
+            content: trimmed.to_string(),
+            content_type: ContentType::Email,
+        };
+    }
+
+    // 5. Check if JSON
+    if (trimmed.starts_with('{') && trimmed.ends_with('}'))
+        || (trimmed.starts_with('[') && trimmed.ends_with(']'))
+    {
+        if serde_json::from_str::<serde_json::Value>(trimmed).is_ok() {
+            return AnalyzedText {
+                content: trimmed.to_string(),
+                content_type: ContentType::JsonData,
+            };
+        }
+    }
+
+    // 6. Check if Code Snippet
+    let code_indicators = [
+        "fn ", "let ", "let mut ", "pub fn", "def ", "class ", "import ", "const ",
+        "function ", "var ", "val ", "#include", "<html", "SELECT ", "INSERT INTO ",
+        "return ", "if (", "while (", "for (", "=>",
+    ];
+    if code_indicators.iter().any(|ind| trimmed.contains(ind)) || (trimmed.contains('{') && trimmed.contains('}') && trimmed.contains(';')) {
+        return AnalyzedText {
+            content: trimmed.to_string(),
+            content_type: ContentType::CodeSnippet,
+        };
+    }
+
+    // Default
+    AnalyzedText {
+        content: trimmed.to_string(),
+        content_type: ContentType::PlainText,
+    }
+}
diff --git a/src/ui/cli.rs b/src/ui/cli.rs
new file mode 100644
index 0000000..dc52e40
--- /dev/null
+++ b/src/ui/cli.rs
@@ -0,0 +1,73 @@
+use clap::{Parser, Subcommand};
+use std::path::PathBuf;
+
+#[derive(Parser, Debug)]
+#[command(name = "zerosend", author, version, about = "⚡ Ultra-fast P2P file sharing over ZeroTier, Tailscale, Radmin VPN & LAN")]
+pub struct Cli {
+    #[command(subcommand)]
+    pub command: Option<Commands>,
+
+    /// Network interface name or IP to bind to (defaults to ZeroTier / best available)
+    #[arg(short, long)]
+    pub interface: Option<String>,
+
+    /// Custom device name to broadcast
+    #[arg(short, long)]
+    pub name: Option<String>,
+
+    /// Transfer HTTP port (default: 53318)
+    #[arg(short, long, default_value_t = 53318)]
+    pub port: u16,
+
+    /// Run in Terminal (TUI) mode instead of GUI
+    #[arg(long, default_value_t = false)]
+    pub tui: bool,
+
+    /// Downloads directory (default: ./downloads)
+    #[arg(short, long, default_value = "./downloads")]
+    pub download_dir: PathBuf,
+
+    /// Start minimized to system tray (used for Windows autostart)
+    #[arg(long, default_value_t = false)]
+    pub tray: bool,
+
+    /// Start minimized to system tray (alias)
+    #[arg(long, default_value_t = false)]
+    pub minimized: bool,
+
+    /// Initial files or folders to send (e.g. from Windows Context Menu)
+    #[arg(trailing_var_arg = true)]
+    pub files: Vec<PathBuf>,
+}
+
+#[derive(Subcommand, Debug)]
+pub enum Commands {
+    /// Send file(s) directly to a target peer IP or URL
+    Send {
+        /// Target peer IP address or URL (e.g. 10.147.20.55 or http://10.147.20.55:53318)
+        target: String,
+
+        /// Path to file(s) or folder(s) to send
+        #[arg(required = true)]
+        files: Vec<PathBuf>,
+    },
+
+    /// Run in headless receiver/daemon mode
+    Receive {
+        /// Automatically accept incoming file transfer requests
+        #[arg(short, long, default_value_t = false)]
+        auto_accept: bool,
+    },
+
+    /// List all detected network interfaces (ZeroTier, Tailscale, Radmin, LAN)
+    Interfaces,
+
+    /// Ping a ZeroSend node to check connectivity and fetch device info
+    Ping {
+        /// Target IP address
+        ip: String,
+        /// Target port (default 53318)
+        #[arg(short, long, default_value_t = 53318)]
+        port: u16,
+    },
+}
diff --git a/src/ui/gui.rs b/src/ui/gui.rs
new file mode 100644
index 0000000..8961128
--- /dev/null
+++ b/src/ui/gui.rs
@@ -0,0 +1,3668 @@
+use crate::config::{AppConfig, SharedFolderConfig, ThemeMode};
+use crate::network::{get_available_interfaces, DiscoveryService, InterfaceInfo, NetworkType, PeerInfo};
+use crate::registry::{
+    is_autostart_registered, is_system_dark_mode,
+    register_autostart, unregister_autostart,
+};
+use crate::transfer::{
+    analyze_text, AnalyzedText, ContentType, PrepareTransferRequest, SharedFolderTreeResponse,
+    TextMessage, TransferClient, TransferProgress, TransferServer, TransferState,
+};
+use crate::ui::tray::{SystemTrayManager, TrayAction};
+use crate::ui::vim_viewer::VimViewerModal;
+use crate::updater::{
+    check_gitea_update, perform_update_download, UpdateInfo, UpdateProgress,
+    GITEA_DEFAULT_REPO_URL,
+};
+use eframe::egui::{
+    self, Align, Button, CentralPanel, Color32, ColorImage, Frame, Layout, Margin, ProgressBar,
+    RichText, Rounding, ScrollArea, SidePanel, Stroke, TextureHandle, TextureOptions, Ui, Vec2,
+};
+use human_bytes::human_bytes;
+use qrcode::{Color as QrColor, QrCode};
+use rfd::FileDialog;
+use std::collections::{HashMap, HashSet};
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::{Duration, Instant};
+use tokio::sync::{mpsc, RwLock};
+
+#[derive(PartialEq, Eq, Clone, Copy)]
+pub enum Tab {
+    Nearby,
+    Send,
+    Receive,
+    Shared,
+    Transfers,
+    Settings,
+}
+
+#[derive(PartialEq, Eq, Clone, Copy)]
+pub enum SharedSubTab {
+    NetworkShares,
+    MyShares,
+}
+
+#[derive(PartialEq, Eq, Clone, Copy)]
+pub enum SendMode {
+    Files,
+    QuickText,
+}
+
+#[derive(Clone, Copy, Debug)]
+pub struct ThemeColors {
+    pub is_dark: bool,
+    pub bg_app: Color32,
+    pub bg_sidebar: Color32,
+    pub bg_card: Color32,
+    pub bg_card_secondary: Color32,
+    pub bg_card_active: Color32,
+    pub bg_hover: Color32,
+    pub stroke_border: Stroke,
+    pub stroke_subtle: Stroke,
+    pub text_primary: Color32,
+    pub text_secondary: Color32,
+    pub text_muted: Color32,
+    pub text_accent: Color32,
+}
+
+impl ThemeColors {
+    pub fn new(is_dark: bool) -> Self {
+        if is_dark {
+            Self {
+                is_dark: true,
+                bg_app: Color32::from_rgb(11, 15, 25),
+                bg_sidebar: Color32::from_rgb(15, 23, 42),
+                bg_card: Color32::from_rgb(30, 41, 59),
+                bg_card_secondary: Color32::from_rgb(15, 23, 42),
+                bg_card_active: Color32::from_rgb(30, 58, 138),
+                bg_hover: Color32::from_rgb(51, 65, 85),
+                stroke_border: Stroke::new(1.0_f32, Color32::from_rgb(51, 65, 85)),
+                stroke_subtle: Stroke::new(1.0_f32, Color32::from_rgba_premultiplied(255, 255, 255, 15)),
+                text_primary: Color32::from_rgb(248, 250, 252),
+                text_secondary: Color32::from_rgb(203, 213, 225),
+                text_muted: Color32::from_rgb(148, 163, 184),
+                text_accent: Color32::from_rgb(56, 189, 248),
+            }
+        } else {
+            Self {
+                is_dark: false,
+                bg_app: Color32::from_rgb(241, 245, 249),
+                bg_sidebar: Color32::from_rgb(255, 255, 255),
+                bg_card: Color32::from_rgb(255, 255, 255),
+                bg_card_secondary: Color32::from_rgb(248, 250, 252),
+                bg_card_active: Color32::from_rgb(219, 234, 254),
+                bg_hover: Color32::from_rgb(226, 232, 240),
+                stroke_border: Stroke::new(1.0_f32, Color32::from_rgb(203, 213, 225)),
+                stroke_subtle: Stroke::new(1.0_f32, Color32::from_rgb(226, 232, 240)),
+                text_primary: Color32::from_rgb(15, 23, 42),
+                text_secondary: Color32::from_rgb(51, 65, 85),
+                text_muted: Color32::from_rgb(100, 116, 139),
+                text_accent: Color32::from_rgb(2, 132, 199),
+            }
+        }
+    }
+}
+
+pub fn get_file_badge_info(name: &str, is_dir: bool) -> (&'static str, Color32, &'static str) {
+    if is_dir {
+        return ("📁", Color32::from_rgb(234, 179, 8), "FOLDER");
+    }
+    let lower = name.to_lowercase();
+    if lower.ends_with(".zip") || lower.ends_with(".rar") || lower.ends_with(".7z") || lower.ends_with(".tar") || lower.ends_with(".gz") || lower.ends_with(".bz2") || lower.ends_with(".xz") {
+        ("📦", Color32::from_rgb(245, 158, 11), "ARCHIVE")
+    } else if lower.ends_with(".png") || lower.ends_with(".jpg") || lower.ends_with(".jpeg") || lower.ends_with(".gif") || lower.ends_with(".webp") || lower.ends_with(".bmp") || lower.ends_with(".svg") || lower.ends_with(".ico") {
+        ("🖼", Color32::from_rgb(56, 189, 248), "IMAGE")
+    } else if lower.ends_with(".mp4") || lower.ends_with(".mkv") || lower.ends_with(".avi") || lower.ends_with(".mov") || lower.ends_with(".webm") || lower.ends_with(".flv") {
+        ("🎬", Color32::from_rgb(168, 85, 247), "VIDEO")
+    } else if lower.ends_with(".mp3") || lower.ends_with(".wav") || lower.ends_with(".flac") || lower.ends_with(".ogg") || lower.ends_with(".m4a") || lower.ends_with(".aac") {
+        ("🎵", Color32::from_rgb(236, 72, 153), "AUDIO")
+    } else if lower.ends_with(".exe") || lower.ends_with(".msi") || lower.ends_with(".iso") || lower.ends_with(".bin") || lower.ends_with(".dll") {
+        ("💾", Color32::from_rgb(34, 197, 94), "BIN/ISO")
+    } else if lower.ends_with(".txt") || lower.ends_with(".md") || lower.ends_with(".pdf") || lower.ends_with(".docx") || lower.ends_with(".doc") || lower.ends_with(".xlsx") || lower.ends_with(".pptx") {
+        ("📄", Color32::from_rgb(59, 130, 246), "DOC")
+    } else if lower.ends_with(".rs") || lower.ends_with(".py") || lower.ends_with(".js") || lower.ends_with(".ts") || lower.ends_with(".html") || lower.ends_with(".css") || lower.ends_with(".json") || lower.ends_with(".toml") || lower.ends_with(".cpp") || lower.ends_with(".c") {
+        ("💻", Color32::from_rgb(20, 184, 166), "CODE")
+    } else {
+        ("📄", Color32::from_rgb(148, 163, 184), "FILE")
+    }
+}
+
+pub fn get_file_icon(name: &str) -> &'static str {
+    get_file_badge_info(name, false).0
+}
+
+pub struct ZeroSendApp {
+    // Services
+    discovery_peers: Arc<RwLock<HashMap<String, PeerInfo>>>,
+    server: TransferServer,
+    client: Arc<TransferClient>,
+    my_info: crate::network::DiscoveryBeacon,
+    current_iface: InterfaceInfo,
+    config: AppConfig,
+    tray_manager: Option<SystemTrayManager>,
+
+    // Navigation & State
+    current_tab: Tab,
+    send_mode: SendMode,
+    peers: Vec<PeerInfo>,
+    selected_peer_ids: HashSet<String>,
+    queued_files: Vec<PathBuf>,
+    transfers: Vec<TransferProgress>,
+    logs: Vec<String>,
+
+    // Quick Text Input
+    text_input: String,
+    analyzed_preview: AnalyzedText,
+
+    // Optional PIN for sender
+    recipient_pin: String,
+
+    // Channels from Server
+    incoming_request_rx: mpsc::UnboundedReceiver<PrepareTransferRequest>,
+    incoming_text_rx: mpsc::UnboundedReceiver<TextMessage>,
+
+    // Modals
+    pending_request: Option<PrepareTransferRequest>,
+    received_text_modal: Option<TextMessage>,
+    show_direct_ip_modal: bool,
+    direct_ip_input: String,
+    direct_ip_status: String,
+
+    // Peer Rename Modal
+    renaming_peer: Option<(String, String, String)>,
+
+    // Settings
+    custom_device_name: String,
+    available_interfaces: Vec<InterfaceInfo>,
+    auto_accept: bool,
+    require_pin: bool,
+    pin_code: String,
+    download_dir: PathBuf,
+    close_to_tray: bool,
+    auto_zip_folders: bool,
+    auto_extract_zip: bool,
+    max_upload_speed_mbps: u32,
+    sound_notifications: bool,
+    autostart_enabled: bool,
+    pub theme_mode: ThemeMode,
+
+    // Shared Folders State
+    shared_folders: Vec<SharedFolderConfig>,
+    selected_share_subtab: SharedSubTab,
+    selected_peer_id_for_share: Option<String>,
+    selected_folder_id_for_share: Option<String>,
+    current_share_subpath: String,
+    current_share_tree: Option<SharedFolderTreeResponse>,
+    share_tree_loading: bool,
+    share_search_query: String,
+    share_pin_input: String,
+    last_share_sync: Instant,
+    pub vim_viewer: VimViewerModal,
+
+    // Gitea Updater State
+    pub update_info: Option<UpdateInfo>,
+    pub is_checking_update: bool,
+    pub update_check_status_msg: Option<String>,
+    pub update_progress: Option<UpdateProgress>,
+    pub is_updating: bool,
+    pub show_update_banner: bool,
+    pub check_updates_on_startup: bool,
+
+    // Internal UI Channels
+    log_rx: mpsc::UnboundedReceiver<String>,
+    log_tx: mpsc::UnboundedSender<String>,
+    transfer_rx: mpsc::UnboundedReceiver<TransferProgress>,
+    transfer_tx: mpsc::UnboundedSender<TransferProgress>,
+    share_tree_rx: mpsc::UnboundedReceiver<Option<SharedFolderTreeResponse>>,
+    share_tree_tx: mpsc::UnboundedSender<Option<SharedFolderTreeResponse>>,
+    share_text_rx: mpsc::UnboundedReceiver<(String, String, String, String)>,
+    share_text_tx: mpsc::UnboundedSender<(String, String, String, String)>,
+    update_rx: mpsc::UnboundedReceiver<Result<UpdateInfo, String>>,
+    update_tx: mpsc::UnboundedSender<Result<UpdateInfo, String>>,
+    update_prog_rx: mpsc::UnboundedReceiver<UpdateProgress>,
+    update_prog_tx: mpsc::UnboundedSender<UpdateProgress>,
+
+    last_poll: Instant,
+    last_ping_poll: Instant,
+    last_window_save: Instant,
+}
+
+fn setup_custom_fonts(ctx: &egui::Context) {
+    let mut fonts = egui::FontDefinitions::default();
+
+    #[cfg(target_os = "windows")]
+    {
+        let win_dir = std::env::var("WINDIR").unwrap_or_else(|_| "C:\\Windows".to_string());
+        let candidate_fonts = [
+            ("segoe_ui", format!("{}\\Fonts\\segoeui.ttf", win_dir)),
+            ("segoe_ui_sym", format!("{}\\Fonts\\seguisym.ttf", win_dir)),
+            ("segoe_ui_emoji", format!("{}\\Fonts\\seguiemj.ttf", win_dir)),
+            ("arial", format!("{}\\Fonts\\arial.ttf", win_dir)),
+        ];
+
+        for (name, path) in candidate_fonts {
+            if let Ok(bytes) = std::fs::read(&path) {
+                fonts.font_data.insert(
+                    name.to_string(),
+                    egui::FontData::from_owned(bytes),
+                );
+
+                if let Some(family) = fonts.families.get_mut(&egui::FontFamily::Proportional) {
+                    family.push(name.to_string());
+                }
+                if let Some(family) = fonts.families.get_mut(&egui::FontFamily::Monospace) {
+                    family.push(name.to_string());
+                }
+            }
+        }
+    }
+
+    ctx.set_fonts(fonts);
+}
+
+impl ZeroSendApp {
+    pub fn new(
+        cc: &eframe::CreationContext<'_>,
+        discovery: &DiscoveryService,
+        server: TransferServer,
+        config: AppConfig,
+        initial_files: Vec<PathBuf>,
+        incoming_request_rx: mpsc::UnboundedReceiver<PrepareTransferRequest>,
+        incoming_text_rx: mpsc::UnboundedReceiver<TextMessage>,
+    ) -> Self {
+        setup_custom_fonts(&cc.egui_ctx);
+
+        let (log_tx, log_rx) = mpsc::unbounded_channel();
+        let (transfer_tx, transfer_rx) = mpsc::unbounded_channel();
+        let (share_tree_tx, share_tree_rx) = mpsc::unbounded_channel();
+        let (share_text_tx, share_text_rx) = mpsc::unbounded_channel();
+        let (update_tx, update_rx) = mpsc::unbounded_channel();
+        let (update_prog_tx, update_prog_rx) = mpsc::unbounded_channel();
+
+        // Subscribe to server transfer events (web uploads, incoming P2P transfers)
+        let mut server_transfer_rx = server.state().transfer_events.subscribe();
+        let transfer_tx_clone = transfer_tx.clone();
+        let ctx_clone = cc.egui_ctx.clone();
+        tokio::spawn(async move {
+            while let Ok(progress) = server_transfer_rx.recv().await {
+                let _ = transfer_tx_clone.send(progress);
+                ctx_clone.request_repaint();
+            }
+        });
+
+        // Trigger startup update check from Gitea if enabled
+        if config.check_updates_on_startup {
+            let u_tx = update_tx.clone();
+            let api_url = config.gitea_api_url.clone();
+            tokio::spawn(async move {
+                let res = check_gitea_update(api_url.as_deref()).await;
+                let _ = u_tx.send(res);
+            });
+        }
+
+        let my_info = discovery.my_info().clone();
+        let iface = discovery.selected_interface().clone();
+        let download_dir = config.download_dir.clone();
+        let auto_accept = config.auto_accept;
+        let require_pin = config.require_pin;
+        let pin_code = config.pin_code.clone();
+        let close_to_tray = config.close_to_tray;
+        let auto_zip_folders = config.auto_zip_folders;
+        let auto_extract_zip = config.auto_extract_zip;
+        let max_upload_speed_mbps = config.max_upload_speed_mbps;
+        let sound_notifications = config.sound_notifications;
+        let theme_mode = config.theme_mode;
+        let check_updates_on_startup = config.check_updates_on_startup;
+        let device_name = my_info.name.clone();
+        let shared_folders = config.shared_folders.clone();
+        let initial_tab = if !initial_files.is_empty() {
+            Tab::Send
+        } else {
+            Tab::Nearby
+        };
+
+        let tray_manager = SystemTrayManager::new(cc.egui_ctx.clone(), download_dir.clone()).ok();
+
+        Self {
+            discovery_peers: discovery.peers(),
+            server,
+            client: Arc::new(TransferClient::new()),
+            my_info: my_info.clone(),
+            current_iface: iface,
+            config,
+            tray_manager,
+            current_tab: initial_tab,
+            send_mode: SendMode::Files,
+            peers: Vec::new(),
+            selected_peer_ids: HashSet::new(),
+            queued_files: initial_files,
+            transfers: Vec::new(),
+            logs: vec!["⚡ ZeroSend v2.4.1 ready".to_string()],
+            text_input: String::new(),
+            analyzed_preview: analyze_text(""),
+            recipient_pin: String::new(),
+            incoming_request_rx,
+            incoming_text_rx,
+            pending_request: None,
+            received_text_modal: None,
+            show_direct_ip_modal: false,
+            direct_ip_input: String::new(),
+            direct_ip_status: String::new(),
+            renaming_peer: None,
+            custom_device_name: device_name,
+            available_interfaces: get_available_interfaces(),
+            auto_accept,
+            require_pin,
+            pin_code,
+            download_dir,
+            close_to_tray,
+            auto_zip_folders,
+            auto_extract_zip,
+            max_upload_speed_mbps,
+            sound_notifications,
+            autostart_enabled: is_autostart_registered(),
+            theme_mode,
+            shared_folders,
+            selected_share_subtab: SharedSubTab::NetworkShares,
+            selected_peer_id_for_share: None,
+            selected_folder_id_for_share: None,
+            current_share_subpath: String::new(),
+            current_share_tree: None,
+            share_tree_loading: false,
+            share_search_query: String::new(),
+            share_pin_input: String::new(),
+            last_share_sync: Instant::now(),
+            vim_viewer: VimViewerModal::default(),
+            update_info: None,
+            is_checking_update: false,
+            update_check_status_msg: None,
+            update_progress: None,
+            is_updating: false,
+            show_update_banner: false,
+            check_updates_on_startup,
+            log_rx,
+            log_tx,
+            transfer_rx,
+            transfer_tx,
+            share_tree_rx,
+            share_tree_tx,
+            share_text_rx,
+            share_text_tx,
+            update_rx,
+            update_tx,
+            update_prog_rx,
+            update_prog_tx,
+            last_poll: Instant::now(),
+            last_ping_poll: Instant::now(),
+            last_window_save: Instant::now(),
+        }
+    }
+
+    fn poll_events(&mut self, ctx: &egui::Context) {
+        // 1. Poll Tray Actions
+        if let Some(tray) = &self.tray_manager {
+            if let Some(action) = tray.try_recv_action() {
+                match action {
+                    TrayAction::ShowWindow => {
+                        ctx.send_viewport_cmd(egui::ViewportCommand::Visible(true));
+                        ctx.send_viewport_cmd(egui::ViewportCommand::Minimized(false));
+                        ctx.send_viewport_cmd(egui::ViewportCommand::Focus);
+                    }
+                    TrayAction::OpenDownloads => {
+                        let _ = std::process::Command::new("explorer").arg(&self.download_dir).spawn();
+                    }
+                }
+            }
+        }
+
+        // 2. Poll incoming file transfer requests
+        while let Ok(req) = self.incoming_request_rx.try_recv() {
+            self.pending_request = Some(req.clone());
+            self.current_tab = Tab::Transfers;
+            self.logs.push(format!("📥 Incoming transfer request from {}", req.sender_name));
+            ctx.send_viewport_cmd(egui::ViewportCommand::Visible(true));
+            ctx.send_viewport_cmd(egui::ViewportCommand::Minimized(false));
+            ctx.send_viewport_cmd(egui::ViewportCommand::Focus);
+        }
+
+        // 3. Poll incoming text messages
+        while let Ok(msg) = self.incoming_text_rx.try_recv() {
+            self.received_text_modal = Some(msg.clone());
+            self.logs.push(format!("📋 Received text from {}", msg.sender_name));
+            ctx.send_viewport_cmd(egui::ViewportCommand::Visible(true));
+            ctx.send_viewport_cmd(egui::ViewportCommand::Minimized(false));
+            ctx.send_viewport_cmd(egui::ViewportCommand::Focus);
+        }
+
+        // 4. Poll UI logs
+        while let Ok(log) = self.log_rx.try_recv() {
+            self.logs.push(log);
+            if self.logs.len() > 100 {
+                self.logs.remove(0);
+            }
+        }
+
+        // 5. Poll transfer updates from client & server
+        while let Ok(t) = self.transfer_rx.try_recv() {
+            let just_completed = t.state == TransferState::Completed;
+            if let Some(pos) = self.transfers.iter().position(|x| x.session_id == t.session_id) {
+                let prev_state = self.transfers[pos].state.clone();
+                self.transfers[pos] = t;
+                if just_completed && prev_state != TransferState::Completed && self.sound_notifications {
+                    crate::ui::sound::play_transfer_sound();
+                }
+            } else {
+                self.transfers.insert(0, t);
+                self.current_tab = Tab::Transfers;
+                ctx.send_viewport_cmd(egui::ViewportCommand::Visible(true));
+                ctx.send_viewport_cmd(egui::ViewportCommand::Minimized(false));
+                ctx.send_viewport_cmd(egui::ViewportCommand::Focus);
+                if just_completed && self.sound_notifications {
+                    crate::ui::sound::play_transfer_sound();
+                }
+            }
+        }
+
+        // 6. Direct sync with Server active transfers (Incoming downloads fallback)
+        if let Ok(server_transfers) = self.server.state().active_transfers.try_read() {
+            for (id, st) in server_transfers.iter() {
+                let just_completed = st.state == TransferState::Completed;
+                if let Some(pos) = self.transfers.iter().position(|x| x.session_id == *id) {
+                    let prev_state = self.transfers[pos].state.clone();
+                    self.transfers[pos] = st.clone();
+                    if just_completed && prev_state != TransferState::Completed && self.sound_notifications {
+                        crate::ui::sound::play_transfer_sound();
+                    }
+                } else {
+                    self.transfers.insert(0, st.clone());
+                    self.current_tab = Tab::Transfers;
+                    ctx.send_viewport_cmd(egui::ViewportCommand::Visible(true));
+                    ctx.send_viewport_cmd(egui::ViewportCommand::Minimized(false));
+                    ctx.send_viewport_cmd(egui::ViewportCommand::Focus);
+                    if just_completed && self.sound_notifications {
+                        crate::ui::sound::play_transfer_sound();
+                    }
+                }
+            }
+        }
+
+        // 7. Poll share tree updates
+        while let Ok(maybe_tree) = self.share_tree_rx.try_recv() {
+            self.share_tree_loading = false;
+            self.current_share_tree = maybe_tree;
+        }
+
+        // 8. Poll vim text updates
+        while let Ok((file_name, rel_path, peer_name, content)) = self.share_text_rx.try_recv() {
+            self.vim_viewer.open(file_name, rel_path, peer_name, content);
+        }
+
+        // 9. Poll Gitea update check results
+        while let Ok(res) = self.update_rx.try_recv() {
+            self.is_checking_update = false;
+            match res {
+                Ok(info) => {
+                    if info.has_update {
+                        self.show_update_banner = true;
+                        self.logs.push(format!("✨ Gitea: New version v{} is available!", info.latest_version));
+                    } else {
+                        self.update_check_status_msg = Some(format!("ZeroSend v{} is up to date!", info.current_version));
+                    }
+                    self.update_info = Some(info);
+                }
+                Err(e) => {
+                    self.update_check_status_msg = Some(format!("Update check failed: {}", e));
+                }
+            }
+        }
+
+        // 10. Poll Gitea update installation progress
+        while let Ok(prog) = self.update_prog_rx.try_recv() {
+            match &prog {
+                UpdateProgress::Completed => {
+                    self.is_updating = false;
+                    self.logs.push("🎉 Update completed! Restarting ZeroSend...".to_string());
+                }
+                UpdateProgress::Error(e) => {
+                    self.is_updating = false;
+                    self.logs.push(format!("❌ Update error: {}", e));
+                }
+                _ => {}
+            }
+            self.update_progress = Some(prog);
+        }
+
+        // 9. Auto-sync network shared folder view (every 4 seconds)
+        if self.last_share_sync.elapsed() > Duration::from_secs(4) {
+            self.last_share_sync = Instant::now();
+            if self.current_tab == Tab::Shared && self.selected_share_subtab == SharedSubTab::NetworkShares {
+                self.sync_active_share_tree_background();
+            }
+        }
+
+        // 10. Discovery & Server pending requests
+        if self.last_poll.elapsed() > Duration::from_millis(300) {
+            self.last_poll = Instant::now();
+
+            // Refresh discovered peer list with Favorite Pins prioritized
+            if let Ok(peers_guard) = self.discovery_peers.try_read() {
+                let mut list: Vec<PeerInfo> = peers_guard.values().cloned().collect();
+                let favs = &self.config.favorite_peers;
+                list.sort_by(|a, b| {
+                    let a_fav = favs.contains(&a.peer_id);
+                    let b_fav = favs.contains(&b.peer_id);
+                    b_fav.cmp(&a_fav)
+                        .then_with(|| b.is_online.cmp(&a.is_online))
+                        .then_with(|| a.name.cmp(&b.name))
+                });
+                self.peers = list;
+            }
+
+            // Double check if there's an active pending request in server state
+            if self.pending_request.is_none() {
+                if let Ok(pending_guard) = self.server.state().pending_requests.try_read() {
+                    if let Some((_, req)) = pending_guard.iter().next() {
+                        self.pending_request = Some(req.clone());
+                        ctx.send_viewport_cmd(egui::ViewportCommand::Visible(true));
+                        ctx.send_viewport_cmd(egui::ViewportCommand::Focus);
+                    }
+                }
+            }
+        }
+
+        // 11. Periodic ping update for online peers (every 3 seconds)
+        if self.last_ping_poll.elapsed() > Duration::from_secs(3) {
+            self.last_ping_poll = Instant::now();
+            let peers_to_ping: Vec<(String, String, u16)> = self
+                .peers
+                .iter()
+                .filter(|p| p.is_online)
+                .map(|p| (p.peer_id.clone(), p.ip.to_string(), p.transfer_port))
+                .collect();
+
+            if !peers_to_ping.is_empty() {
+                let disc_peers = self.discovery_peers.clone();
+                let client = self.client.clone();
+                tokio::spawn(async move {
+                    for (peer_id, ip, port) in peers_to_ping {
+                        if let Some(ms) = client.measure_ping(&ip, port).await {
+                            if let Ok(mut guard) = disc_peers.try_write() {
+                                if let Some(peer_entry) = guard.get_mut(&peer_id) {
+                                    peer_entry.ping_ms = Some(ms);
+                                }
+                            }
+                        }
+                    }
+                });
+            }
+        }
+    }
+
+    fn persist_config(&mut self) {
+        self.config.download_dir = self.download_dir.clone();
+        self.config.auto_accept = self.auto_accept;
+        self.config.require_pin = self.require_pin;
+        self.config.pin_code = self.pin_code.clone();
+        self.config.close_to_tray = self.close_to_tray;
+        self.config.auto_zip_folders = self.auto_zip_folders;
+        self.config.auto_extract_zip = self.auto_extract_zip;
+        self.config.max_upload_speed_mbps = self.max_upload_speed_mbps;
+        self.config.sound_notifications = self.sound_notifications;
+        self.config.theme_mode = self.theme_mode;
+        self.config.device_name = Some(self.custom_device_name.clone());
+        self.config.preferred_interface = Some(self.current_iface.name.clone());
+        self.config.shared_folders = self.shared_folders.clone();
+        let _ = self.config.save();
+
+        let srv = self.server.clone();
+        let auto_acc = self.auto_accept;
+        let req_pin = self.require_pin;
+        let p_code = self.pin_code.clone();
+        let auto_ext = self.auto_extract_zip;
+        let sf_clone = self.shared_folders.clone();
+        tokio::spawn(async move {
+            srv.update_auto_accept(auto_acc).await;
+            srv.update_pin_settings(req_pin, p_code).await;
+            srv.update_extract_settings(auto_ext).await;
+            srv.update_shared_folders(sf_clone).await;
+        });
+    }
+
+    fn get_peer_display_name(&self, peer: &PeerInfo) -> (String, bool) {
+        if let Some(alias) = self.config.peer_aliases.get(&peer.peer_id) {
+            if !alias.trim().is_empty() {
+                return (format!("{} ({})", alias, peer.name), true);
+            }
+        }
+        (peer.name.clone(), false)
+    }
+
+    fn try_paste_clipboard_image(&mut self) -> bool {
+        for _ in 0..5 {
+            if let Ok(mut clipboard) = arboard::Clipboard::new() {
+                // 1. Check for image in clipboard
+                if let Ok(img_data) = clipboard.get_image() {
+                    let temp_dir = std::env::temp_dir().join("ZeroSend");
+                    let _ = std::fs::create_dir_all(&temp_dir);
+                    let timestamp = chrono::Local::now().format("%Y%m%d_%H%M%S");
+                    let file_path = temp_dir.join(format!("screenshot_{}.png", timestamp));
+
+                    if let Some(img_buffer) = image::RgbaImage::from_raw(
+                        img_data.width as u32,
+                        img_data.height as u32,
+                        img_data.bytes.into_owned(),
+                    ) {
+                        if img_buffer.save(&file_path).is_ok() {
+                            if !self.queued_files.contains(&file_path) {
+                                self.queued_files.push(file_path.clone());
+                            }
+                            self.current_tab = Tab::Send;
+                            self.send_mode = SendMode::Files;
+                            self.logs.push(format!(
+                                "📸 Pasted screenshot ({}x{}) to queue",
+                                img_data.width, img_data.height
+                            ));
+                            return true;
+                        }
+                    }
+                }
+
+                // 2. Check for copied file paths or text in clipboard
+                if let Ok(text) = clipboard.get_text() {
+                    let mut added_any = false;
+                    for line in text.lines() {
+                        let trimmed = line.trim().trim_matches('"');
+                        let path = PathBuf::from(trimmed);
+                        if path.exists() {
+                            if !self.queued_files.contains(&path) {
+                                self.queued_files.push(path.clone());
+                                added_any = true;
+                            }
+                        }
+                    }
+                    if added_any {
+                        self.current_tab = Tab::Send;
+                        self.send_mode = SendMode::Files;
+                        self.logs.push("📄 Pasted copied file(s) from clipboard to queue".to_string());
+                        return true;
+                    }
+                }
+
+                break;
+            }
+            std::thread::sleep(Duration::from_millis(25));
+        }
+        false
+    }
+
+    fn start_sending_files(&mut self, targets: Vec<PeerInfo>, files: Vec<PathBuf>) {
+        if targets.is_empty() || files.is_empty() {
+            return;
+        }
+
+        let client = self.client.clone();
+        let my_info = self.my_info.clone();
+        let transfer_tx = self.transfer_tx.clone();
+        let log_tx = self.log_tx.clone();
+        let auto_zip = self.auto_zip_folders;
+        let speed_limit = self.max_upload_speed_mbps;
+        let pin = if self.recipient_pin.trim().is_empty() {
+            None
+        } else {
+            Some(self.recipient_pin.trim().to_string())
+        };
+
+        self.queued_files.clear();
+        self.current_tab = Tab::Transfers;
+
+        for peer in targets {
+            let peer_url = peer.transfer_url();
+            let peer_name = self.get_peer_display_name(&peer).0;
+            let files_clone = files.clone();
+            let client_clone = client.clone();
+            let my_info_clone = my_info.clone();
+            let transfer_tx_clone = transfer_tx.clone();
+            let log_tx_clone = log_tx.clone();
+            let pin_clone = pin.clone();
+
+            tokio::spawn(async move {
+                let _ = log_tx_clone.send(format!("📤 Sending {} items to {}...", files_clone.len(), peer_name));
+                let res = client_clone
+                    .send_files(&peer_url, &peer_name, &my_info_clone, &files_clone, auto_zip, speed_limit, pin_clone, move |progress| {
+                        let _ = transfer_tx_clone.send(progress);
+                    })
+                    .await;
+
+                match res {
+                    Ok(_) => {
+                        let _ = log_tx_clone.send(format!("🎉 All files delivered to {}!", peer_name));
+                    }
+                    Err(e) => {
+                        let _ = log_tx_clone.send(format!("⚠️ Transfer failed to {}: {}", peer_name, e));
+                    }
+                }
+            });
+        }
+    }
+
+    fn render_sidebar(&mut self, _ctx: &egui::Context, ui: &mut Ui, theme: ThemeColors) {
+        ui.add_space(8.0);
+
+        ui.horizontal(|ui| {
+            ui.add_space(4.0);
+            ui.label(RichText::new("⚡").size(24.0).color(theme.text_accent));
+            ui.vertical(|ui| {
+                ui.label(RichText::new("ZeroSend").size(18.0).strong().color(theme.text_primary));
+                ui.label(RichText::new("ZeroTier & VPN Sharing").size(10.0).color(theme.text_muted));
+            });
+        });
+
+        ui.add_space(14.0);
+        ui.separator();
+        ui.add_space(10.0);
+
+        // Network Badge Card
+        Frame::none()
+            .fill(theme.bg_card)
+            .rounding(Rounding::same(8.0))
+            .stroke(theme.stroke_border)
+            .inner_margin(Margin::same(10.0))
+            .show(ui, |ui| {
+                ui.horizontal(|ui| {
+                    let dot_color = if self.current_iface.net_type == NetworkType::ZeroTier {
+                        Color32::from_rgb(34, 197, 94)
+                    } else {
+                        Color32::from_rgb(59, 130, 246)
+                    };
+                    ui.label(RichText::new("●").color(dot_color).size(14.0));
+                    ui.vertical(|ui| {
+                        ui.label(
+                            RichText::new(self.current_iface.net_type.as_str())
+                                .strong()
+                                .size(12.0)
+                                .color(theme.text_primary),
+                        );
+                        ui.label(
+                            RichText::new(format!("{}:{}", self.current_iface.ip, self.my_info.transfer_port))
+                                .size(10.0)
+                                .color(theme.text_muted),
+                        );
+                    });
+                });
+            });
+
+        ui.add_space(16.0);
+
+        let active_count = self
+            .transfers
+            .iter()
+            .filter(|t| t.state == TransferState::InProgress || t.state == TransferState::PendingConfirmation)
+            .count();
+
+        let friend_shares_count: usize = self.peers.iter().map(|p| p.shared_folders.len()).sum();
+        let total_shares = self.shared_folders.len() + friend_shares_count;
+
+        let tabs = [
+            (Tab::Nearby, "📡  Nearby Friends", self.peers.len(), false),
+            (Tab::Send, "📤  Send (Files/Text)", self.queued_files.len(), false),
+            (Tab::Receive, "📥  Receive / Web", 0, false),
+            (Tab::Shared, "📁  Shared Folders", total_shares, false),
+            (Tab::Transfers, "📜  Transfers", active_count, active_count > 0),
+            (Tab::Settings, "⚙  Settings & About", 0, false),
+        ];
+
+        for (tab, title, count, is_active_pulse) in tabs {
+            let is_selected = self.current_tab == tab;
+            let mut btn_text = title.to_string();
+            if count > 0 && tab != Tab::Receive && tab != Tab::Settings {
+                if is_active_pulse {
+                    btn_text = format!("{} (⚡ {})", title, count);
+                } else {
+                    btn_text = format!("{} ({})", title, count);
+                }
+            }
+
+            let text_color = if is_selected {
+                if theme.is_dark {
+                    Color32::from_rgb(56, 189, 248)
+                } else {
+                    Color32::from_rgb(2, 132, 199)
+                }
+            } else if is_active_pulse {
+                Color32::from_rgb(250, 204, 21)
+            } else {
+                theme.text_secondary
+            };
+
+            let bg_color = if is_selected {
+                theme.bg_card_active
+            } else {
+                Color32::TRANSPARENT
+            };
+
+            let btn = Button::new(RichText::new(btn_text).size(13.0).color(text_color).strong())
+                .fill(bg_color)
+                .min_size(Vec2::new(ui.available_width(), 36.0))
+                .rounding(Rounding::same(6.0));
+
+            if ui.add(btn).clicked() {
+                self.current_tab = tab;
+            }
+            ui.add_space(4.0);
+        }
+
+        ui.with_layout(Layout::bottom_up(Align::Center), |ui| {
+            ui.add_space(10.0);
+            ui.label(
+                RichText::new(format!("v{}", env!("CARGO_PKG_VERSION")))
+                    .size(10.0)
+                    .color(theme.text_muted),
+            );
+        });
+    }
+
+    fn render_nearby_tab(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ui.horizontal(|ui| {
+            ui.heading(RichText::new("📡 Discovered Nodes (ZeroTier / VPN)").color(theme.text_primary));
+            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                if ui.button(RichText::new("🔍 Direct Connect (IP)").strong()).clicked() {
+                    self.show_direct_ip_modal = true;
+                    self.direct_ip_status.clear();
+                }
+            });
+        });
+
+        ui.label(
+            RichText::new("Devices in your ZeroTier network running ZeroSend appear here automatically.")
+                .size(12.0)
+                .color(theme.text_muted),
+        );
+        ui.add_space(12.0);
+
+        if self.peers.is_empty() {
+            Frame::none()
+                .fill(theme.bg_card)
+                .rounding(Rounding::same(12.0))
+                .stroke(theme.stroke_border)
+                .inner_margin(Margin::same(40.0))
+                .show(ui, |ui| {
+                    ui.vertical_centered(|ui| {
+                        ui.label(RichText::new("🔍").size(42.0));
+                        ui.add_space(8.0);
+                        ui.label(RichText::new("Scanning ZeroTier network for friends...").size(16.0).strong().color(theme.text_primary));
+                        ui.add_space(4.0);
+                        ui.label(
+                            RichText::new("Ensure your friends are connected to your ZeroTier network or use Direct Connect.")
+                                .size(12.0)
+                                .color(theme.text_muted),
+                        );
+                    });
+                });
+            return;
+        }
+
+        let dropped_files = ui.ctx().input(|i| i.raw.dropped_files.clone());
+        let is_hovering_files = ui.ctx().input(|i| !i.raw.hovered_files.is_empty());
+        let pointer_pos = ui.ctx().input(|i| i.pointer.hover_pos());
+
+        if is_hovering_files {
+            Frame::none()
+                .fill(theme.bg_card_secondary)
+                .rounding(Rounding::same(8.0))
+                .stroke(Stroke::new(1.5_f32, theme.text_accent))
+                .inner_margin(Margin::same(10.0))
+                .show(ui, |ui| {
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("🎯 Drop files directly onto any friend's card below to send instantly!").size(13.0).strong().color(theme.text_accent));
+                    });
+                });
+            ui.add_space(8.0);
+        }
+
+        let mut toggle_fav: Option<String> = None;
+        let mut rename_target: Option<(String, String, String)> = None;
+        let mut send_to_peer: Option<String> = None;
+        let mut quick_drop_target: Option<(PeerInfo, Vec<PathBuf>)> = None;
+
+        ScrollArea::vertical().show(ui, |ui| {
+            for peer in &self.peers {
+                let peer_id = peer.peer_id.clone();
+                let is_checked = self.selected_peer_ids.contains(&peer_id);
+                let (display_name, has_alias) = self.get_peer_display_name(peer);
+
+                let card_response = Frame::none()
+                    .fill(if is_checked {
+                        theme.bg_card_active
+                    } else {
+                        theme.bg_card
+                    })
+                    .rounding(Rounding::same(10.0))
+                    .stroke(if is_hovering_files {
+                        Stroke::new(1.5_f32, theme.text_accent)
+                    } else {
+                        theme.stroke_border
+                    })
+                    .inner_margin(Margin::same(14.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            let os_icon = match peer.os.to_lowercase().as_str() {
+                                "windows" => "🪟",
+                                "linux" => "🐧",
+                                "macos" => "🍎",
+                                _ => "💻",
+                            };
+
+                            ui.label(RichText::new(os_icon).size(28.0));
+                            ui.add_space(8.0);
+
+                            ui.vertical(|ui| {
+                                ui.horizontal(|ui| {
+                                    ui.label(
+                                        RichText::new(&display_name)
+                                            .size(15.0)
+                                            .strong()
+                                            .color(if has_alias { Color32::from_rgb(250, 204, 21) } else { theme.text_primary }),
+                                    );
+
+                                    let is_fav = self.config.favorite_peers.contains(&peer.peer_id);
+                                    let star_icon = if is_fav { "⭐" } else { "☆" };
+                                    if ui.small_button(star_icon).on_hover_text(if is_fav { "Unpin from Favorites" } else { "Pin to Favorites" }).clicked() {
+                                        toggle_fav = Some(peer.peer_id.clone());
+                                    }
+
+                                    if ui.small_button("✏").on_hover_text("Rename / Set Alias").clicked() {
+                                        let curr = self.config.peer_aliases.get(&peer.peer_id).cloned().unwrap_or_default();
+                                        rename_target = Some((peer.peer_id.clone(), peer.name.clone(), curr));
+                                    }
+
+                                    let badge_color = if peer.net_type.contains("ZeroTier") {
+                                        Color32::from_rgb(34, 197, 94)
+                                    } else {
+                                        Color32::from_rgb(59, 130, 246)
+                                    };
+                                    ui.label(
+                                        RichText::new(format!("[{}]", peer.net_type))
+                                            .size(11.0)
+                                            .color(badge_color),
+                                    );
+                                });
+
+                                ui.horizontal(|ui| {
+                                    ui.label(
+                                        RichText::new(format!("{}:{} • {}", peer.ip, peer.transfer_port, peer.os))
+                                            .size(11.0)
+                                            .color(theme.text_muted),
+                                    );
+
+                                    if let Some(ms) = peer.ping_ms {
+                                        let (ping_color, ping_icon) = if ms < 40 {
+                                            (Color32::from_rgb(34, 197, 94), "🟢")
+                                        } else if ms <= 100 {
+                                            (Color32::from_rgb(250, 204, 21), "🟡")
+                                        } else {
+                                            (Color32::from_rgb(239, 68, 68), "🔴")
+                                        };
+                                        ui.label(
+                                            RichText::new(format!("• {} {} ms", ping_icon, ms))
+                                                .size(11.0)
+                                                .color(ping_color),
+                                        );
+                                    }
+                                });
+                            });
+
+                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                let send_btn = Button::new(RichText::new("📤 Send").strong().color(Color32::WHITE))
+                                    .fill(Color32::from_rgb(37, 99, 235))
+                                    .rounding(Rounding::same(6.0))
+                                    .min_size(Vec2::new(90.0, 32.0));
+
+                                if ui.add(send_btn).clicked() {
+                                    send_to_peer = Some(peer_id);
+                                }
+                            });
+                        });
+                    })
+                    .response;
+
+                if !dropped_files.is_empty() {
+                    let is_target = if let Some(pos) = pointer_pos {
+                        card_response.rect.contains(pos)
+                    } else {
+                        card_response.hovered()
+                    };
+
+                    if is_target {
+                        let paths: Vec<PathBuf> = dropped_files.iter().filter_map(|f| f.path.clone()).collect();
+                        if !paths.is_empty() {
+                            quick_drop_target = Some((peer.clone(), paths));
+                        }
+                    }
+                }
+
+                ui.add_space(8.0);
+            }
+        });
+
+        if let Some((target_peer, files)) = quick_drop_target {
+            self.logs.push(format!("🎯 Quick Drop: Sending {} item(s) to {}...", files.len(), self.get_peer_display_name(&target_peer).0));
+            self.start_sending_files(vec![target_peer], files);
+        }
+
+        if let Some(pid) = toggle_fav {
+            if self.config.favorite_peers.contains(&pid) {
+                self.config.favorite_peers.retain(|id| id != &pid);
+            } else {
+                self.config.favorite_peers.push(pid);
+            }
+            self.persist_config();
+        }
+
+        if let Some(ren) = rename_target {
+            self.renaming_peer = Some(ren);
+        }
+
+        if let Some(pid) = send_to_peer {
+            self.selected_peer_ids.clear();
+            self.selected_peer_ids.insert(pid);
+            self.current_tab = Tab::Send;
+        }
+    }
+
+    fn render_send_tab(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ui.horizontal(|ui| {
+            ui.heading(RichText::new("📤 Send to Friends").color(theme.text_primary));
+            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                ui.selectable_value(&mut self.send_mode, SendMode::QuickText, "📋 Quick Text / Clipboard");
+                ui.selectable_value(&mut self.send_mode, SendMode::Files, "📁 Files & Folders");
+            });
+        });
+        ui.add_space(8.0);
+
+        // Multi-Recipient Selector Card
+        Frame::none()
+            .fill(theme.bg_card)
+            .rounding(Rounding::same(8.0))
+            .stroke(theme.stroke_border)
+            .inner_margin(Margin::same(12.0))
+            .show(ui, |ui| {
+                ui.horizontal(|ui| {
+                    ui.label(RichText::new("Recipients:").strong().size(13.0).color(theme.text_primary));
+
+                    if !self.peers.is_empty() {
+                        let all_selected = self.selected_peer_ids.len() == self.peers.len();
+                        if ui.small_button(if all_selected { "Deselect All" } else { "Select All" }).clicked() {
+                            if all_selected {
+                                self.selected_peer_ids.clear();
+                            } else {
+                                self.selected_peer_ids = self.peers.iter().map(|p| p.peer_id.clone()).collect();
+                            }
+                        }
+                    }
+
+                    ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                        ui.horizontal(|ui| {
+                            ui.label(RichText::new("PIN (optional):").size(11.0).color(theme.text_muted));
+                            ui.add(egui::TextEdit::singleline(&mut self.recipient_pin).desired_width(60.0));
+                        });
+                    });
+                });
+
+                ui.add_space(6.0);
+
+                if self.peers.is_empty() {
+                    ui.label(RichText::new("No online peers found yet. Discovering...").color(theme.text_muted));
+                } else {
+                    ui.horizontal_wrapped(|ui| {
+                        for p in &self.peers {
+                            let is_selected = self.selected_peer_ids.contains(&p.peer_id);
+                            let (name_label, _) = self.get_peer_display_name(p);
+                            let chip_text = format!("{} ({})", name_label, p.ip);
+
+                            let chip_btn = Button::new(
+                                RichText::new(format!("{} {}", if is_selected { "✅" } else { "⬜" }, chip_text))
+                                    .size(12.0)
+                                    .color(if is_selected { Color32::WHITE } else { theme.text_secondary }),
+                            )
+                            .fill(if is_selected {
+                                Color32::from_rgb(37, 99, 235)
+                            } else {
+                                theme.bg_card_secondary
+                            })
+                            .rounding(Rounding::same(14.0));
+
+                            if ui.add(chip_btn).clicked() {
+                                if is_selected {
+                                    self.selected_peer_ids.remove(&p.peer_id);
+                                } else {
+                                    self.selected_peer_ids.insert(p.peer_id.clone());
+                                }
+                            }
+                        }
+                    });
+                }
+            });
+
+        ui.add_space(14.0);
+
+        match self.send_mode {
+            SendMode::Files => self.render_send_files_subview(ui, theme),
+            SendMode::QuickText => self.render_send_text_subview(ui, theme),
+        }
+    }
+
+    fn render_send_files_subview(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ui.horizontal(|ui| {
+            if ui
+                .add(
+                    Button::new(RichText::new("📄 Add Files").strong().color(Color32::WHITE))
+                        .fill(Color32::from_rgb(59, 130, 246))
+                        .min_size(Vec2::new(120.0, 34.0))
+                        .rounding(Rounding::same(6.0)),
+                )
+                .clicked()
+            {
+                if let Some(files) = FileDialog::new().pick_files() {
+                    for f in files {
+                        if !self.queued_files.contains(&f) {
+                            self.queued_files.push(f);
+                        }
+                    }
+                }
+            }
+
+            if ui
+                .add(
+                    Button::new(RichText::new("📁 Add Folder").strong().color(Color32::WHITE))
+                        .fill(Color32::from_rgb(79, 70, 229))
+                        .min_size(Vec2::new(120.0, 34.0))
+                        .rounding(Rounding::same(6.0)),
+                )
+                .clicked()
+            {
+                if let Some(folder) = FileDialog::new().pick_folder() {
+                    if !self.queued_files.contains(&folder) {
+                        self.queued_files.push(folder);
+                    }
+                }
+            }
+
+            if ui
+                .add(
+                    Button::new(RichText::new("📸 Paste Screenshot (Ctrl+V)").color(Color32::WHITE))
+                        .fill(Color32::from_rgb(147, 51, 234))
+                        .min_size(Vec2::new(180.0, 34.0))
+                        .rounding(Rounding::same(6.0)),
+                )
+                .clicked()
+            {
+                self.try_paste_clipboard_image();
+            }
+
+            if !self.queued_files.is_empty() {
+                if ui.button("Clear list").clicked() {
+                    self.queued_files.clear();
+                }
+            }
+        });
+
+        ui.add_space(10.0);
+
+        let total_size: u64 = self
+            .queued_files
+            .iter()
+            .filter_map(|p| std::fs::metadata(p).ok().map(|m| m.len()))
+            .sum();
+
+        ui.horizontal(|ui| {
+            ui.label(
+                RichText::new(format!(
+                    "Selected Items: {} ({}) | Recipients: {}",
+                    self.queued_files.len(),
+                    human_bytes(total_size as f64),
+                    self.selected_peer_ids.len()
+                ))
+                .size(13.0)
+                .strong()
+                .color(theme.text_primary),
+            );
+            if self.auto_zip_folders {
+                ui.label(RichText::new("• (Folders auto-compressed to ZIP)").size(11.0).color(Color32::from_rgb(34, 197, 94)));
+            }
+        });
+        ui.add_space(6.0);
+
+        Frame::none()
+            .fill(theme.bg_card_secondary)
+            .rounding(Rounding::same(8.0))
+            .stroke(theme.stroke_border)
+            .inner_margin(Margin::same(8.0))
+            .show(ui, |ui| {
+                ScrollArea::vertical().max_height(200.0).show(ui, |ui| {
+                    if self.queued_files.is_empty() {
+                        ui.vertical_centered(|ui| {
+                            ui.add_space(24.0);
+                            ui.label(RichText::new("📂 Drag & Drop files or folders here").size(14.0).strong().color(theme.text_muted));
+                            ui.add_space(4.0);
+                            ui.label(RichText::new("or paste screenshots directly with Ctrl+V").size(11.0).color(theme.text_muted));
+                            ui.add_space(24.0);
+                        });
+                    } else {
+                        let mut to_remove = None;
+                        for (idx, path) in self.queued_files.iter().enumerate() {
+                            let is_dir = path.is_dir();
+                            let name = path.file_name().map(|n| n.to_string_lossy().into_owned()).unwrap_or_default();
+                            let (icon, badge_color, category) = get_file_badge_info(&name, is_dir);
+                            let size_str = std::fs::metadata(path).ok().map(|m| human_bytes(m.len() as f64)).unwrap_or_default();
+
+                            Frame::none()
+                                .fill(theme.bg_card)
+                                .rounding(Rounding::same(6.0))
+                                .stroke(theme.stroke_border)
+                                .inner_margin(Margin::symmetric(10.0, 6.0))
+                                .show(ui, |ui| {
+                                    ui.horizontal(|ui| {
+                                        ui.label(RichText::new(icon).size(16.0));
+
+                                        // Category Badge Pill
+                                        Frame::none()
+                                            .fill(badge_color.linear_multiply(0.2))
+                                            .rounding(Rounding::same(4.0))
+                                            .inner_margin(Margin::symmetric(6.0, 2.0))
+                                            .show(ui, |ui| {
+                                                ui.label(RichText::new(category).size(9.0).color(badge_color).strong());
+                                            });
+
+                                        ui.label(RichText::new(&name).strong().color(theme.text_primary));
+                                        ui.label(RichText::new(format!("({})", size_str)).size(11.0).color(theme.text_muted));
+
+                                        ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                            if ui.small_button("✕").on_hover_text("Remove from queue").clicked() {
+                                                to_remove = Some(idx);
+                                            }
+                                        });
+                                    });
+                                });
+                            ui.add_space(4.0);
+                        }
+
+                        if let Some(i) = to_remove {
+                            self.queued_files.remove(i);
+                        }
+                    }
+                });
+            });
+
+        ui.add_space(16.0);
+
+        let num_recipients = self.selected_peer_ids.len();
+        let can_send = !self.queued_files.is_empty() && num_recipients > 0;
+        let send_btn_text = if num_recipients == 1 {
+            let target_name = self
+                .peers
+                .iter()
+                .find(|p| self.selected_peer_ids.contains(&p.peer_id))
+                .map(|p| self.get_peer_display_name(p).0)
+                .unwrap_or_else(|| "...".to_string());
+            format!("🚀 Send {} Item(s) to {}", self.queued_files.len(), target_name)
+        } else {
+            format!("🚀 Broadcast {} Item(s) to {} Recipients", self.queued_files.len(), num_recipients)
+        };
+
+        let send_btn = Button::new(RichText::new(send_btn_text).size(15.0).strong().color(Color32::WHITE))
+            .fill(if can_send {
+                Color32::from_rgb(16, 185, 129)
+            } else {
+                if theme.is_dark { Color32::from_rgb(51, 65, 85) } else { Color32::from_rgb(203, 213, 225) }
+            })
+            .min_size(Vec2::new(ui.available_width(), 44.0))
+            .rounding(Rounding::same(8.0));
+
+        if ui.add_enabled(can_send, send_btn).clicked() {
+            let targets: Vec<PeerInfo> = self
+                .peers
+                .iter()
+                .filter(|p| self.selected_peer_ids.contains(&p.peer_id))
+                .cloned()
+                .collect();
+            let files = self.queued_files.clone();
+            self.start_sending_files(targets, files);
+        }
+    }
+
+    fn render_send_text_subview(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ui.horizontal(|ui| {
+            ui.label(RichText::new("Enter or paste text to send:").strong().color(theme.text_primary));
+
+            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                if ui.button("📋 Paste from Clipboard").clicked() {
+                    if let Ok(mut clipboard) = arboard::Clipboard::new() {
+                        if let Ok(text) = clipboard.get_text() {
+                            self.text_input = text;
+                            self.analyzed_preview = analyze_text(&self.text_input);
+                        }
+                    }
+                }
+            });
+        });
+
+        ui.add_space(6.0);
+
+        let response = ui.add(
+            egui::TextEdit::multiline(&mut self.text_input)
+                .desired_rows(6)
+                .desired_width(ui.available_width())
+                .font(egui::TextStyle::Monospace),
+        );
+
+        if response.changed() {
+            self.analyzed_preview = analyze_text(&self.text_input);
+        }
+
+        ui.add_space(8.0);
+
+        if !self.text_input.trim().is_empty() {
+            let (r, g, b) = self.analyzed_preview.content_type.badge_color_rgb();
+            Frame::none()
+                .fill(theme.bg_card_secondary)
+                .rounding(Rounding::same(6.0))
+                .stroke(Stroke::new(1.0_f32, Color32::from_rgb(r, g, b)))
+                .inner_margin(Margin::same(8.0))
+                .show(ui, |ui| {
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("Auto-Detected:").size(11.0).color(theme.text_muted));
+                        ui.label(
+                            RichText::new(self.analyzed_preview.content_type.label())
+                                .size(12.0)
+                                .strong()
+                                .color(Color32::from_rgb(r, g, b)),
+                        );
+                    });
+                });
+            ui.add_space(10.0);
+        }
+
+        let num_recipients = self.selected_peer_ids.len();
+        let can_send_text = !self.text_input.trim().is_empty() && num_recipients > 0;
+        let btn_label = if num_recipients == 1 {
+            let target_name = self
+                .peers
+                .iter()
+                .find(|p| self.selected_peer_ids.contains(&p.peer_id))
+                .map(|p| self.get_peer_display_name(p).0)
+                .unwrap_or_else(|| "...".to_string());
+            format!("🚀 Send Text to {}", target_name)
+        } else {
+            format!("🚀 Broadcast Text to {} Recipients", num_recipients)
+        };
+
+        let send_btn = Button::new(RichText::new(btn_label).size(14.0).strong().color(Color32::WHITE))
+            .fill(if can_send_text {
+                Color32::from_rgb(16, 185, 129)
+            } else {
+                if theme.is_dark { Color32::from_rgb(51, 65, 85) } else { Color32::from_rgb(203, 213, 225) }
+            })
+            .min_size(Vec2::new(ui.available_width(), 40.0))
+            .rounding(Rounding::same(8.0));
+
+        if ui.add_enabled(can_send_text, send_btn).clicked() {
+            let targets: Vec<PeerInfo> = self
+                .peers
+                .iter()
+                .filter(|p| self.selected_peer_ids.contains(&p.peer_id))
+                .cloned()
+                .collect();
+
+            let text = self.text_input.clone();
+            let client = self.client.clone();
+            let my_info = self.my_info.clone();
+            let log_tx = self.log_tx.clone();
+            let pin = if self.recipient_pin.trim().is_empty() {
+                None
+            } else {
+                Some(self.recipient_pin.trim().to_string())
+            };
+
+            for peer in targets {
+                let peer_url = peer.transfer_url();
+                let peer_name = self.get_peer_display_name(&peer).0;
+                let text_clone = text.clone();
+                let client_clone = client.clone();
+                let my_info_clone = my_info.clone();
+                let log_tx_clone = log_tx.clone();
+                let pin_clone = pin.clone();
+
+                tokio::spawn(async move {
+                    match client_clone.send_text(&peer_url, &my_info_clone, &text_clone, pin_clone).await {
+                        Ok(analyzed) => {
+                            let _ = log_tx_clone.send(format!(
+                                "🎉 Sent text [{}] to {}!",
+                                analyzed.content_type.label(),
+                                peer_name
+                            ));
+                        }
+                        Err(e) => {
+                            let _ = log_tx_clone.send(format!("⚠️ Text send failed to {}: {}", peer_name, e));
+                        }
+                    }
+                });
+            }
+
+            self.text_input.clear();
+        }
+    }
+
+    fn render_qr_code(ctx: &egui::Context, url: &str, tex_id: &str) -> Option<TextureHandle> {
+        if let Ok(code) = QrCode::new(url.as_bytes()) {
+            let width = code.width();
+            let mut pixels = Vec::with_capacity(width * width);
+            for y in 0..width {
+                for x in 0..width {
+                    let is_dark = code[(x, y)] == QrColor::Dark;
+                    pixels.push(if is_dark { Color32::BLACK } else { Color32::WHITE });
+                }
+            }
+            let image = ColorImage {
+                size: [width, width],
+                pixels,
+            };
+            Some(ctx.load_texture(tex_id, image, TextureOptions::NEAREST))
+        } else {
+            None
+        }
+    }
+
+    fn render_receive_tab(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ScrollArea::vertical().show(ui, |ui| {
+            ui.horizontal(|ui| {
+                ui.heading(RichText::new("📥 Receive & Web Access").color(theme.text_primary));
+                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                    if ui.button("📂 Open Downloads Folder").clicked() {
+                        let _ = std::process::Command::new("explorer").arg(&self.download_dir).spawn();
+                    }
+                });
+            });
+            ui.add_space(8.0);
+
+            // General Storage & Auto-Accept Settings Card
+            Frame::none()
+                .fill(theme.bg_card)
+                .rounding(Rounding::same(10.0))
+                .stroke(theme.stroke_border)
+                .inner_margin(Margin::same(14.0))
+                .show(ui, |ui| {
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("📁 Save Directory:").strong().color(theme.text_primary));
+                        ui.label(RichText::new(format!("{:?}", self.download_dir)).color(theme.text_secondary));
+                    });
+                    ui.add_space(6.0);
+                    ui.horizontal(|ui| {
+                        if ui.checkbox(&mut self.auto_accept, "Auto-accept incoming transfers from friends").changed() {
+                            self.persist_config();
+                        }
+                        if ui.checkbox(&mut self.auto_extract_zip, "Auto-extract received ZIP folders").changed() {
+                            self.persist_config();
+                        }
+                    });
+                });
+
+            ui.add_space(14.0);
+            ui.label(RichText::new("📱 Send from Phone / Browser (Web Dropzone)").strong().size(15.0).color(theme.text_primary));
+            ui.label(RichText::new("Scan the QR code with your phone camera or open the link in any mobile browser to send photos, videos, and files directly to this PC:").size(12.0).color(theme.text_muted));
+            ui.add_space(10.0);
+
+            let port = self.my_info.transfer_port;
+
+            // 1. ZeroTier / VPN Interface
+            let vpn_iface = if self.current_iface.is_virtual_vpn() {
+                Some(self.current_iface.clone())
+            } else {
+                self.available_interfaces.iter().find(|i| i.is_virtual_vpn()).cloned()
+            };
+
+            // 2. Local Wi-Fi / LAN Interface
+            let lan_iface = if !self.current_iface.is_virtual_vpn() && self.current_iface.net_type != NetworkType::Loopback {
+                Some(self.current_iface.clone())
+            } else {
+                self.available_interfaces.iter().find(|i| !i.is_virtual_vpn() && i.net_type != NetworkType::Loopback).cloned()
+            };
+
+            // Card 1: ZeroTier / VPN Mesh
+            if let Some(iface) = &vpn_iface {
+                let url = format!("http://{}:{}", iface.ip, port);
+                let qr_tex = Self::render_qr_code(ui.ctx(), &url, "qr_vpn");
+
+                Frame::none()
+                    .fill(theme.bg_card)
+                    .rounding(Rounding::same(10.0))
+                    .stroke(Stroke::new(1.0_f32, Color32::from_rgb(168, 85, 247)))
+                    .inner_margin(Margin::same(14.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            ui.vertical(|ui| {
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new("🌐 ZeroTier / VPN Mesh Link").size(15.0).strong().color(theme.text_primary));
+                                    Frame::none()
+                                        .fill(Color32::from_rgba_premultiplied(168, 85, 247, 40))
+                                        .rounding(Rounding::same(4.0))
+                                        .inner_margin(Margin::symmetric(6.0, 2.0))
+                                        .show(ui, |ui| {
+                                            ui.label(RichText::new(iface.net_type.as_str()).size(10.0).color(Color32::from_rgb(192, 132, 252)).strong());
+                                        });
+                                });
+                                ui.add_space(3.0);
+                                ui.label(RichText::new("For phones or laptops connected via ZeroTier, Tailscale, or Radmin VPN mesh:").size(11.0).color(theme.text_muted));
+                                ui.add_space(8.0);
+
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new(&url).size(14.0).strong().color(theme.text_primary));
+                                    if ui.button("📋 Copy").on_hover_text("Copy ZeroTier Web Link").clicked() {
+                                        ui.output_mut(|o| o.copied_text = url.clone());
+                                    }
+                                    if ui.button("🌐 Open").on_hover_text("Open in browser").clicked() {
+                                        ui.ctx().open_url(egui::OpenUrl::same_tab(&url));
+                                    }
+                                });
+                            });
+
+                            if let Some(tex) = qr_tex {
+                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                    Frame::none()
+                                        .fill(Color32::WHITE)
+                                        .rounding(Rounding::same(6.0))
+                                        .stroke(theme.stroke_border)
+                                        .inner_margin(Margin::same(4.0))
+                                        .show(ui, |ui| {
+                                            ui.add(egui::Image::new(&tex).fit_to_exact_size(Vec2::new(90.0, 90.0)));
+                                        });
+                                });
+                            }
+                        });
+                    });
+                ui.add_space(10.0);
+            }
+
+            // Card 2: Local Wi-Fi / LAN Network
+            if let Some(iface) = &lan_iface {
+                let url = format!("http://{}:{}", iface.ip, port);
+                let qr_tex = Self::render_qr_code(ui.ctx(), &url, "qr_lan");
+
+                Frame::none()
+                    .fill(theme.bg_card)
+                    .rounding(Rounding::same(10.0))
+                    .stroke(Stroke::new(1.0_f32, Color32::from_rgb(56, 189, 248)))
+                    .inner_margin(Margin::same(14.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            ui.vertical(|ui| {
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new("🏠 Home Wi-Fi / Local LAN Link").size(15.0).strong().color(theme.text_primary));
+                                    Frame::none()
+                                        .fill(Color32::from_rgba_premultiplied(56, 189, 248, 40))
+                                        .rounding(Rounding::same(4.0))
+                                        .inner_margin(Margin::symmetric(6.0, 2.0))
+                                        .show(ui, |ui| {
+                                            ui.label(RichText::new("Local Wi-Fi").size(10.0).color(Color32::from_rgb(56, 189, 248)).strong());
+                                        });
+                                });
+                                ui.add_space(3.0);
+                                ui.label(RichText::new("For phones, tablets, and devices connected to the same home/office Wi-Fi router:").size(11.0).color(theme.text_muted));
+                                ui.add_space(8.0);
+
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new(&url).size(14.0).strong().color(theme.text_primary));
+                                    if ui.button("📋 Copy").on_hover_text("Copy Local Wi-Fi Link").clicked() {
+                                        ui.output_mut(|o| o.copied_text = url.clone());
+                                    }
+                                    if ui.button("🌐 Open").on_hover_text("Open in browser").clicked() {
+                                        ui.ctx().open_url(egui::OpenUrl::same_tab(&url));
+                                    }
+                                });
+                            });
+
+                            if let Some(tex) = qr_tex {
+                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                    Frame::none()
+                                        .fill(Color32::WHITE)
+                                        .rounding(Rounding::same(6.0))
+                                        .stroke(theme.stroke_border)
+                                        .inner_margin(Margin::same(4.0))
+                                        .show(ui, |ui| {
+                                            ui.add(egui::Image::new(&tex).fit_to_exact_size(Vec2::new(90.0, 90.0)));
+                                        });
+                                });
+                            }
+                        });
+                    });
+            } else if vpn_iface.is_none() {
+                // Fallback if neither was separately classified
+                let url = format!("http://{}:{}", self.current_iface.ip, port);
+                let qr_tex = Self::render_qr_code(ui.ctx(), &url, "qr_fallback");
+
+                Frame::none()
+                    .fill(theme.bg_card)
+                    .rounding(Rounding::same(10.0))
+                    .stroke(Stroke::new(1.0_f32, Color32::from_rgb(59, 130, 246)))
+                    .inner_margin(Margin::same(14.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            ui.vertical(|ui| {
+                                ui.label(RichText::new("🌐 Web Dropzone Link").size(15.0).strong().color(theme.text_primary));
+                                ui.add_space(3.0);
+                                ui.label(RichText::new("Open this link or scan QR code on mobile:").size(11.0).color(theme.text_muted));
+                                ui.add_space(8.0);
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new(&url).size(14.0).strong().color(theme.text_primary));
+                                    if ui.button("📋 Copy").clicked() {
+                                        ui.output_mut(|o| o.copied_text = url.clone());
+                                    }
+                                    if ui.button("🌐 Open").clicked() {
+                                        ui.ctx().open_url(egui::OpenUrl::same_tab(&url));
+                                    }
+                                });
+                            });
+                            if let Some(tex) = qr_tex {
+                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                    Frame::none()
+                                        .fill(Color32::WHITE)
+                                        .rounding(Rounding::same(6.0))
+                                        .stroke(theme.stroke_border)
+                                        .inner_margin(Margin::same(4.0))
+                                        .show(ui, |ui| {
+                                            ui.add(egui::Image::new(&tex).fit_to_exact_size(Vec2::new(90.0, 90.0)));
+                                        });
+                                });
+                            }
+                        });
+                    });
+            }
+            ui.add_space(14.0);
+        });
+    }
+
+    fn refresh_current_share_tree(&mut self) {
+        if let (Some(peer_id), Some(folder_id)) = (
+            self.selected_peer_id_for_share.clone(),
+            self.selected_folder_id_for_share.clone(),
+        ) {
+            if let Some(peer) = self.peers.iter().find(|p| p.peer_id == peer_id) {
+                let peer_url = peer.transfer_url();
+                let subpath = self.current_share_subpath.clone();
+                let pin = if self.share_pin_input.trim().is_empty() {
+                    None
+                } else {
+                    Some(self.share_pin_input.trim().to_string())
+                };
+                let client = self.client.clone();
+                let tx = self.share_tree_tx.clone();
+                let log_tx = self.log_tx.clone();
+                self.share_tree_loading = true;
+
+                tokio::spawn(async move {
+                    match client
+                        .fetch_shared_tree(&peer_url, &folder_id, Some(&subpath), pin.as_deref())
+                        .await
+                    {
+                        Ok(tree) => {
+                            let _ = tx.send(Some(tree));
+                        }
+                        Err(e) => {
+                            let _ = tx.send(None);
+                            let _ = log_tx.send(format!("⚠️ Shared folder error: {}", e));
+                        }
+                    }
+                });
+            }
+        }
+    }
+
+    fn sync_active_share_tree_background(&self) {
+        if let (Some(peer_id), Some(folder_id)) = (
+            self.selected_peer_id_for_share.clone(),
+            self.selected_folder_id_for_share.clone(),
+        ) {
+            if let Some(peer) = self.peers.iter().find(|p| p.peer_id == peer_id && p.is_online) {
+                let peer_url = peer.transfer_url();
+                let subpath = self.current_share_subpath.clone();
+                let pin = if self.share_pin_input.trim().is_empty() {
+                    None
+                } else {
+                    Some(self.share_pin_input.trim().to_string())
+                };
+                let client = self.client.clone();
+                let tx = self.share_tree_tx.clone();
+
+                tokio::spawn(async move {
+                    if let Ok(tree) = client
+                        .fetch_shared_tree(&peer_url, &folder_id, Some(&subpath), pin.as_deref())
+                        .await
+                    {
+                        let _ = tx.send(Some(tree));
+                    }
+                });
+            }
+        }
+    }
+
+    fn render_shared_tab(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ui.horizontal(|ui| {
+            let my_shares_count = self.shared_folders.len();
+            let network_shares_count: usize = self.peers.iter().map(|p| p.shared_folders.len()).sum();
+
+            let net_btn = Button::new(
+                RichText::new(format!("🌐 Network Shares ({})", network_shares_count))
+                    .strong()
+                    .color(if self.selected_share_subtab == SharedSubTab::NetworkShares {
+                        theme.text_primary
+                    } else {
+                        theme.text_secondary
+                    }),
+            )
+            .fill(if self.selected_share_subtab == SharedSubTab::NetworkShares {
+                theme.bg_card_active
+            } else {
+                theme.bg_card
+            })
+            .min_size(Vec2::new(170.0, 32.0))
+            .rounding(Rounding::same(6.0));
+
+            if ui.add(net_btn).clicked() {
+                self.selected_share_subtab = SharedSubTab::NetworkShares;
+            }
+
+            let my_btn = Button::new(
+                RichText::new(format!("💻 My Shares ({})", my_shares_count))
+                    .strong()
+                    .color(if self.selected_share_subtab == SharedSubTab::MyShares {
+                        theme.text_primary
+                    } else {
+                        theme.text_secondary
+                    }),
+            )
+            .fill(if self.selected_share_subtab == SharedSubTab::MyShares {
+                theme.bg_card_active
+            } else {
+                theme.bg_card
+            })
+            .min_size(Vec2::new(150.0, 32.0))
+            .rounding(Rounding::same(6.0));
+
+            if ui.add(my_btn).clicked() {
+                self.selected_share_subtab = SharedSubTab::MyShares;
+            }
+
+            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                if self.selected_share_subtab == SharedSubTab::MyShares {
+                    let add_btn = Button::new(RichText::new("➕ Add Shared Folder").strong().color(Color32::WHITE))
+                        .fill(Color32::from_rgb(34, 197, 94))
+                        .min_size(Vec2::new(160.0, 30.0));
+
+                    if ui.add(add_btn).clicked() {
+                        if let Some(folder) = FileDialog::new().pick_folder() {
+                            let name = folder
+                                .file_name()
+                                .map(|n| n.to_string_lossy().into_owned())
+                                .unwrap_or_else(|| "Shared Folder".to_string());
+                            let id = uuid::Uuid::new_v4().to_string();
+                            self.shared_folders.push(SharedFolderConfig {
+                                id,
+                                name,
+                                path: folder,
+                                read_only: true,
+                                pin: None,
+                            });
+                            self.persist_config();
+                        }
+                    }
+                } else {
+                    if ui.button(RichText::new("🔄 Sync / Refresh").color(theme.text_primary)).clicked() {
+                        self.refresh_current_share_tree();
+                    }
+                }
+            });
+        });
+
+        ui.add_space(10.0);
+
+        match self.selected_share_subtab {
+            SharedSubTab::MyShares => self.render_my_shares(ui, theme),
+            SharedSubTab::NetworkShares => self.render_network_shares(ui, theme),
+        }
+    }
+
+    fn render_my_shares(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        if self.shared_folders.is_empty() {
+            Frame::none()
+                .fill(theme.bg_card)
+                .rounding(Rounding::same(10.0))
+                .stroke(theme.stroke_border)
+                .inner_margin(Margin::same(40.0))
+                .show(ui, |ui| {
+                    ui.vertical_centered(|ui| {
+                        ui.label(RichText::new("📁").size(40.0));
+                        ui.label(
+                            RichText::new("You haven't shared any local folders yet.")
+                                .size(16.0)
+                                .strong()
+                                .color(theme.text_primary),
+                        );
+                        ui.add_space(6.0);
+                        ui.label(
+                            RichText::new(
+                                "Share movies, music, or code folders so your friends on ZeroTier/LAN can stream and download them.",
+                            )
+                            .size(12.0)
+                            .color(theme.text_muted),
+                        );
+                        ui.add_space(16.0);
+                        let choose_btn = Button::new(RichText::new("➕ Choose Folder to Share").strong().color(Color32::WHITE))
+                            .fill(Color32::from_rgb(34, 197, 94))
+                            .min_size(Vec2::new(200.0, 36.0));
+
+                        if ui.add(choose_btn).clicked() {
+                            if let Some(folder) = FileDialog::new().pick_folder() {
+                                let name = folder
+                                    .file_name()
+                                    .map(|n| n.to_string_lossy().into_owned())
+                                    .unwrap_or_else(|| "Shared Folder".to_string());
+                                let id = uuid::Uuid::new_v4().to_string();
+                                self.shared_folders.push(SharedFolderConfig {
+                                    id,
+                                    name,
+                                    path: folder,
+                                    read_only: true,
+                                    pin: None,
+                                });
+                                self.persist_config();
+                            }
+                        }
+                    });
+                });
+            return;
+        }
+
+        let mut config_changed = false;
+        let mut remove_index = None;
+
+        ScrollArea::vertical().show(ui, |ui| {
+            for (idx, share) in self.shared_folders.iter_mut().enumerate() {
+                Frame::none()
+                    .fill(theme.bg_card)
+                    .rounding(Rounding::same(8.0))
+                    .stroke(theme.stroke_border)
+                    .inner_margin(Margin::same(12.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            ui.label(RichText::new("📁").size(24.0));
+                            ui.vertical(|ui| {
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new(&share.name).strong().size(14.0).color(theme.text_primary));
+
+                                    let (ro_label, ro_color) = if share.read_only {
+                                        ("Read-Only (Streaming/Download)", Color32::from_rgb(59, 130, 246))
+                                    } else {
+                                        ("Read & Write (Uploads Allowed)", Color32::from_rgb(34, 197, 94))
+                                    };
+
+                                    Frame::none()
+                                        .fill(theme.bg_card_secondary)
+                                        .rounding(Rounding::same(4.0))
+                                        .stroke(Stroke::new(1.0_f32, ro_color))
+                                        .inner_margin(Margin::symmetric(6.0, 2.0))
+                                        .show(ui, |ui| {
+                                            ui.label(RichText::new(ro_label).size(10.5).color(ro_color));
+                                        });
+
+                                    if share.pin.is_some() {
+                                        Frame::none()
+                                            .fill(theme.bg_card_secondary)
+                                            .rounding(Rounding::same(4.0))
+                                            .stroke(Stroke::new(1.0_f32, Color32::from_rgb(245, 158, 11)))
+                                            .inner_margin(Margin::symmetric(6.0, 2.0))
+                                            .show(ui, |ui| {
+                                                ui.label(
+                                                    RichText::new("🔒 PIN Protected")
+                                                        .size(10.5)
+                                                        .color(Color32::from_rgb(245, 158, 11)),
+                                                );
+                                            });
+                                    }
+                                });
+
+                                ui.label(
+                                    RichText::new(format!("{:?}", share.path))
+                                        .monospace()
+                                        .size(11.0)
+                                        .color(theme.text_muted),
+                                );
+                            });
+
+                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                if ui.button(RichText::new("🗑 Remove").color(Color32::from_rgb(239, 68, 68))).clicked() {
+                                    remove_index = Some(idx);
+                                }
+
+                                if ui.button("📂 Open Folder").clicked() {
+                                    let _ = std::process::Command::new("explorer").arg(&share.path).spawn();
+                                }
+
+                                if ui.checkbox(&mut share.read_only, "Read-Only").changed() {
+                                    config_changed = true;
+                                }
+                            });
+                        });
+                    });
+                ui.add_space(8.0);
+            }
+        });
+
+        if let Some(idx) = remove_index {
+            self.shared_folders.remove(idx);
+            config_changed = true;
+        }
+
+        if config_changed {
+            self.persist_config();
+        }
+    }
+
+    fn render_network_shares(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        let online_peers_with_shares: Vec<PeerInfo> = self
+            .peers
+            .iter()
+            .filter(|p| p.is_online && !p.shared_folders.is_empty())
+            .cloned()
+            .collect();
+
+        if online_peers_with_shares.is_empty() {
+            Frame::none()
+                .fill(theme.bg_card)
+                .rounding(Rounding::same(10.0))
+                .stroke(theme.stroke_border)
+                .inner_margin(Margin::same(40.0))
+                .show(ui, |ui| {
+                    ui.vertical_centered(|ui| {
+                        ui.label(RichText::new("🌐").size(40.0));
+                        ui.label(
+                            RichText::new("No shared folders discovered on your network.")
+                                .size(16.0)
+                                .strong()
+                                .color(theme.text_primary),
+                        );
+                        ui.add_space(6.0);
+                        ui.label(
+                            RichText::new(
+                                "When your friends on ZeroTier / LAN add shared folders, they will automatically appear here with streaming and fast download support.",
+                            )
+                            .size(12.0)
+                            .color(theme.text_muted),
+                        );
+                    });
+                });
+            return;
+        }
+
+        ui.horizontal_top(|ui| {
+            // Left Column: Peer & Folder Selector (250px)
+            ui.allocate_ui(Vec2::new(250.0, ui.available_height()), |ui| {
+                Frame::none()
+                    .fill(theme.bg_card)
+                    .rounding(Rounding::same(8.0))
+                    .stroke(theme.stroke_border)
+                    .inner_margin(Margin::same(10.0))
+                    .show(ui, |ui| {
+                        ui.label(
+                            RichText::new("Friends & Shares")
+                                .strong()
+                                .size(13.0)
+                                .color(theme.text_primary),
+                        );
+                        ui.add_space(6.0);
+                        ui.separator();
+                        ui.add_space(6.0);
+
+                        ScrollArea::vertical().show(ui, |ui| {
+                            for peer in &online_peers_with_shares {
+                                let (peer_display, _) = self.get_peer_display_name(peer);
+                                ui.horizontal(|ui| {
+                                    ui.label(RichText::new("●").color(Color32::from_rgb(34, 197, 94)).size(11.0));
+                                    ui.label(RichText::new(&peer_display).strong().color(theme.text_primary));
+                                });
+
+                                for folder in &peer.shared_folders {
+                                    let is_selected = self.selected_peer_id_for_share.as_deref() == Some(&peer.peer_id)
+                                        && self.selected_folder_id_for_share.as_deref() == Some(&folder.id);
+
+                                    let badge = if folder.read_only { "RO" } else { "RW" };
+                                    let btn_text = format!("📁 {} [{}]", folder.name, badge);
+
+                                    let btn = Button::new(RichText::new(btn_text).size(12.0).color(if is_selected {
+                                        theme.text_accent
+                                    } else {
+                                        theme.text_secondary
+                                    }))
+                                    .fill(if is_selected {
+                                        theme.bg_card_active
+                                    } else {
+                                        Color32::TRANSPARENT
+                                    })
+                                    .min_size(Vec2::new(ui.available_width(), 26.0))
+                                    .rounding(Rounding::same(4.0));
+
+                                    if ui.add(btn).clicked() {
+                                        self.selected_peer_id_for_share = Some(peer.peer_id.clone());
+                                        self.selected_folder_id_for_share = Some(folder.id.clone());
+                                        self.current_share_subpath = String::new();
+                                        self.refresh_current_share_tree();
+                                    }
+                                }
+                                ui.add_space(6.0);
+                            }
+                        });
+                    });
+            });
+
+            ui.add_space(10.0);
+
+            // Right Column: Active Share Explorer
+            ui.vertical(|ui| {
+                if let (Some(peer_id), Some(folder_id)) = (
+                    self.selected_peer_id_for_share.clone(),
+                    self.selected_folder_id_for_share.clone(),
+                ) {
+                    let peer_opt = self.peers.iter().find(|p| p.peer_id == peer_id).cloned();
+                    let peer = match peer_opt {
+                        Some(p) => p,
+                        None => {
+                            ui.label("Selected peer is offline.");
+                            return;
+                        }
+                    };
+
+                    let (peer_name, _) = self.get_peer_display_name(&peer);
+
+                    // Top Explorer Header & Breadcrumbs
+                    Frame::none()
+                        .fill(theme.bg_card)
+                        .rounding(Rounding::same(8.0))
+                        .stroke(theme.stroke_border)
+                        .inner_margin(Margin::same(10.0))
+                        .show(ui, |ui| {
+                            ui.horizontal(|ui| {
+                                if ui.button("🏠 Root").clicked() {
+                                    self.current_share_subpath = String::new();
+                                    self.refresh_current_share_tree();
+                                }
+
+                                if !self.current_share_subpath.is_empty() {
+                                    ui.label("/");
+                                    ui.label(
+                                        RichText::new(&self.current_share_subpath)
+                                            .monospace()
+                                            .strong()
+                                            .color(theme.text_primary),
+                                    );
+                                }
+
+                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                    // Search filter box
+                                    ui.add(
+                                        egui::TextEdit::singleline(&mut self.share_search_query)
+                                            .hint_text("🔍 Filter files...")
+                                            .desired_width(160.0),
+                                    );
+
+                                    // Upload button if folder is Read-Write
+                                    if let Some(tree) = &self.current_share_tree {
+                                        if !tree.read_only {
+                                            let upload_btn = Button::new(
+                                                RichText::new("⬆️ Upload File")
+                                                    .strong()
+                                                    .color(Color32::WHITE),
+                                            )
+                                            .fill(Color32::from_rgb(34, 197, 94))
+                                            .rounding(Rounding::same(6.0));
+
+                                            if ui.add(upload_btn).clicked() {
+                                                if let Some(files) = FileDialog::new().pick_files() {
+                                                    let client = self.client.clone();
+                                                    let peer_url = peer.transfer_url();
+                                                    let f_id = folder_id.clone();
+                                                    let sub = self.current_share_subpath.clone();
+                                                    let pin = if self.share_pin_input.trim().is_empty() {
+                                                        None
+                                                    } else {
+                                                        Some(self.share_pin_input.trim().to_string())
+                                                    };
+                                                    let log_tx = self.log_tx.clone();
+                                                    let tx = self.share_tree_tx.clone();
+
+                                                    tokio::spawn(async move {
+                                                        for f in files {
+                                                            let _ = log_tx.send(format!("⬆️ Uploading {:?} to share...", f.file_name()));
+                                                            match client.upload_to_shared_folder(&peer_url, &f_id, &sub, &f, pin.as_deref()).await {
+                                                                Ok(_) => {
+                                                                    let _ = log_tx.send(format!("✅ Uploaded {:?}", f.file_name()));
+                                                                }
+                                                                Err(e) => {
+                                                                    let _ = log_tx.send(format!("❌ Upload failed: {}", e));
+                                                                }
+                                                            }
+                                                        }
+                                                        // Refresh tree after upload
+                                                        if let Ok(tree) = client.fetch_shared_tree(&peer_url, &f_id, Some(&sub), pin.as_deref()).await {
+                                                            let _ = tx.send(Some(tree));
+                                                        }
+                                                    });
+                                                }
+                                            }
+                                        }
+                                    }
+                                });
+                            });
+                        });
+
+                    ui.add_space(8.0);
+
+                    // Explorer File Table
+                    if self.share_tree_loading {
+                        ui.vertical_centered(|ui| {
+                            ui.add_space(30.0);
+                            ui.spinner();
+                            ui.label("Loading shared contents...");
+                        });
+                    } else if let Some(tree) = self.current_share_tree.clone() {
+                        ScrollArea::vertical().show(ui, |ui| {
+                            // Up to parent row
+                            if !self.current_share_subpath.is_empty() {
+                                Frame::none()
+                                    .fill(theme.bg_card_secondary)
+                                    .rounding(Rounding::same(6.0))
+                                    .inner_margin(Margin::symmetric(10.0, 6.0))
+                                    .show(ui, |ui| {
+                                        ui.horizontal(|ui| {
+                                            ui.label("📁 ..");
+                                            if ui.button("Parent Folder").clicked() {
+                                                let p = std::path::Path::new(&self.current_share_subpath);
+                                                let parent_str = p.parent().map(|p| p.to_string_lossy().replace('\\', "/")).unwrap_or_default();
+                                                self.current_share_subpath = parent_str;
+                                                self.refresh_current_share_tree();
+                                            }
+                                        });
+                                    });
+                                ui.add_space(4.0);
+                            }
+
+                            let q_lower = self.share_search_query.to_lowercase();
+                            for entry in &tree.entries {
+                                if !q_lower.is_empty() && !entry.name.to_lowercase().contains(&q_lower) {
+                                    continue;
+                                }
+
+                                let (icon, badge_color, badge_text) = get_file_badge_info(&entry.name, entry.is_dir);
+
+                                Frame::none()
+                                    .fill(theme.bg_card)
+                                    .rounding(Rounding::same(6.0))
+                                    .stroke(theme.stroke_border)
+                                    .inner_margin(Margin::symmetric(10.0, 6.0))
+                                    .show(ui, |ui| {
+                                        ui.horizontal(|ui| {
+                                            ui.label(RichText::new(icon).size(16.0));
+
+                                            if entry.is_dir {
+                                                if ui.link(RichText::new(&entry.name).strong().color(theme.text_primary)).clicked() {
+                                                    self.current_share_subpath = entry.relative_path.clone();
+                                                    self.refresh_current_share_tree();
+                                                }
+                                            } else {
+                                                ui.label(RichText::new(&entry.name).strong().color(theme.text_primary));
+                                            }
+
+                                            // Badge
+                                            Frame::none()
+                                                .fill(theme.bg_card_secondary)
+                                                .rounding(Rounding::same(3.0))
+                                                .stroke(Stroke::new(1.0_f32, badge_color))
+                                                .inner_margin(Margin::symmetric(5.0, 1.0))
+                                                .show(ui, |ui| {
+                                                    ui.label(RichText::new(badge_text).size(9.5).color(badge_color));
+                                                });
+
+                                            if !entry.is_dir {
+                                                ui.label(
+                                                    RichText::new(format!("({})", human_bytes(entry.size as f64)))
+                                                        .size(11.0)
+                                                        .color(theme.text_muted),
+                                                );
+                                            }
+
+                                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                                // Action: Download
+                                                let is_dir = entry.is_dir;
+                                                let down_label = if is_dir { "⬇️ Zip" } else { "⬇️ Download" };
+                                                if ui.button(down_label).clicked() {
+                                                    let client = self.client.clone();
+                                                    let peer_url = peer.transfer_url();
+                                                    let f_id = folder_id.clone();
+                                                    let sub = entry.relative_path.clone();
+                                                    let out_name = if is_dir { format!("{}.zip", entry.name) } else { entry.name.clone() };
+                                                    let dest = self.download_dir.join(&out_name);
+                                                    let pin = if self.share_pin_input.trim().is_empty() {
+                                                        None
+                                                    } else {
+                                                        Some(self.share_pin_input.trim().to_string())
+                                                    };
+                                                    let log_tx = self.log_tx.clone();
+                                                    let sound = self.sound_notifications;
+
+                                                    tokio::spawn(async move {
+                                                        let _ = log_tx.send(format!("⬇️ Downloading {}...", out_name));
+                                                        match client.download_shared_file(&peer_url, &f_id, &sub, &dest, pin.as_deref()).await {
+                                                            Ok(bytes) => {
+                                                                let _ = log_tx.send(format!("✅ Downloaded {} ({})", out_name, human_bytes(bytes as f64)));
+                                                                if sound {
+                                                                    crate::ui::sound::play_transfer_sound();
+                                                                }
+                                                            }
+                                                            Err(e) => {
+                                                                let _ = log_tx.send(format!("❌ Download failed: {}", e));
+                                                            }
+                                                        }
+                                                    });
+                                                }
+
+                                                // Action: Stream / Play (for video & audio)
+                                                if badge_text == "VIDEO" || badge_text == "AUDIO" {
+                                                    if ui.button(RichText::new("▶️ Stream").color(Color32::from_rgb(236, 72, 153)).strong()).clicked() {
+                                                        let stream_url = format!(
+                                                            "{}/api/shared/stream/{}/{}",
+                                                            peer.transfer_url(),
+                                                            folder_id,
+                                                            entry.relative_path.trim_start_matches('/')
+                                                        );
+                                                        let _ = std::process::Command::new("explorer").arg(&stream_url).spawn();
+                                                    }
+                                                }
+
+                                                // Action: Vim View (for code & text)
+                                                if badge_text == "CODE" || badge_text == "DOC" || entry.name.ends_with(".txt") || entry.name.ends_with(".log") {
+                                                    if ui.button(RichText::new("👁 Vim View").color(Color32::from_rgb(20, 184, 166)).strong()).clicked() {
+                                                        let client = self.client.clone();
+                                                        let peer_url = peer.transfer_url();
+                                                        let f_id = folder_id.clone();
+                                                        let sub = entry.relative_path.clone();
+                                                        let file_name = entry.name.clone();
+                                                        let peer_display = peer_name.clone();
+                                                        let text_tx = self.share_text_tx.clone();
+                                                        let pin = if self.share_pin_input.trim().is_empty() {
+                                                            None
+                                                        } else {
+                                                            Some(self.share_pin_input.trim().to_string())
+                                                        };
+
+                                                        tokio::spawn(async move {
+                                                            if let Ok(text) = client.fetch_shared_file_text(&peer_url, &f_id, &sub, pin.as_deref()).await {
+                                                                let _ = text_tx.send((file_name, sub, peer_display, text));
+                                                            }
+                                                        });
+                                                    }
+                                                }
+                                            });
+                                        });
+                                    });
+                                ui.add_space(3.0);
+                            }
+                        });
+                    } else {
+                        Frame::none()
+                            .fill(theme.bg_card)
+                            .rounding(Rounding::same(8.0))
+                            .stroke(theme.stroke_border)
+                            .inner_margin(Margin::same(20.0))
+                            .show(ui, |ui| {
+                                ui.vertical_centered(|ui| {
+                                    ui.label(RichText::new("🔒 Folder Locked or Empty").strong().size(14.0).color(theme.text_primary));
+                                    ui.add_space(6.0);
+                                    ui.horizontal(|ui| {
+                                        ui.label("Enter PIN if required:");
+                                        ui.add(egui::TextEdit::singleline(&mut self.share_pin_input).password(true).desired_width(120.0));
+                                        if ui.button("Unlock / Refresh").clicked() {
+                                            self.refresh_current_share_tree();
+                                        }
+                                    });
+                                });
+                            });
+                    }
+                } else {
+                    Frame::none()
+                        .fill(theme.bg_card)
+                        .rounding(Rounding::same(8.0))
+                        .stroke(theme.stroke_border)
+                        .inner_margin(Margin::same(40.0))
+                        .show(ui, |ui| {
+                            ui.vertical_centered(|ui| {
+                                ui.label(RichText::new("👈 Select a shared folder on the left to browse files, watch streams, and view code in Vim.").color(theme.text_muted));
+                            });
+                        });
+                }
+            });
+        });
+    }
+
+    fn render_transfers_tab(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ui.horizontal(|ui| {
+            ui.heading(RichText::new("📜 Active & Completed Transfers").color(theme.text_primary));
+            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                if ui.button("📂 Open Downloads").clicked() {
+                    let _ = std::process::Command::new("explorer").arg(&self.download_dir).spawn();
+                }
+                if !self.transfers.is_empty() && ui.button("🗑️ Clear finished").clicked() {
+                    self.transfers.retain(|t| t.state == TransferState::InProgress || t.state == TransferState::PendingConfirmation);
+                    let srv = self.server.clone();
+                    tokio::spawn(async move {
+                        srv.clear_finished().await;
+                    });
+                }
+            });
+        });
+        ui.add_space(8.0);
+
+        if self.transfers.is_empty() {
+            Frame::none()
+                .fill(theme.bg_card)
+                .rounding(Rounding::same(10.0))
+                .stroke(theme.stroke_border)
+                .inner_margin(Margin::same(40.0))
+                .show(ui, |ui| {
+                    ui.vertical_centered(|ui| {
+                        ui.label(RichText::new("📦").size(36.0));
+                        ui.label(RichText::new("No active or past transfers.").size(15.0).color(theme.text_secondary));
+                        ui.add_space(4.0);
+                        ui.label(RichText::new("Transfers will appear here with live speed and progress.").size(12.0).color(theme.text_muted));
+                    });
+                });
+            return;
+        }
+
+        ScrollArea::vertical().show(ui, |ui| {
+            for t in &self.transfers {
+                let is_done = t.state == TransferState::Completed;
+                let is_active = t.state == TransferState::InProgress;
+                let icon = get_file_icon(&t.current_file_name);
+
+                Frame::none()
+                    .fill(if is_active {
+                        if theme.is_dark {
+                            Color32::from_rgb(23, 37, 84)
+                        } else {
+                            Color32::from_rgb(219, 234, 254)
+                        }
+                    } else {
+                        theme.bg_card
+                    })
+                    .rounding(Rounding::same(10.0))
+                    .stroke(if is_active {
+                        Stroke::new(1.0_f32, Color32::from_rgb(59, 130, 246))
+                    } else if is_done {
+                        Stroke::new(1.0_f32, Color32::from_rgb(34, 197, 94))
+                    } else {
+                        theme.stroke_border
+                    })
+                    .inner_margin(Margin::same(14.0))
+                    .show(ui, |ui| {
+                        // Top row: Direction, Peer, and Status Badge
+                        ui.horizontal(|ui| {
+                            let (dir_badge, dir_color) = if t.is_incoming {
+                                (format!("📥 Received from {}", t.peer_name), Color32::from_rgb(192, 132, 252))
+                            } else {
+                                (format!("📤 Sent to {}", t.peer_name), Color32::from_rgb(96, 165, 250))
+                            };
+
+                            ui.label(RichText::new(dir_badge).size(13.0).strong().color(dir_color));
+
+                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                match &t.state {
+                                    TransferState::Completed => {
+                                        ui.horizontal(|ui| {
+                                            ui.label(RichText::new("✅ Completed").color(Color32::from_rgb(34, 197, 94)).strong().size(13.0));
+                                            if t.checksum_verified {
+                                                Frame::none()
+                                                    .fill(Color32::from_rgba_premultiplied(34, 197, 94, 35))
+                                                    .rounding(Rounding::same(4.0))
+                                                    .stroke(Stroke::new(1.0_f32, Color32::from_rgb(34, 197, 94)))
+                                                    .inner_margin(Margin::symmetric(6.0, 2.0))
+                                                    .show(ui, |ui| {
+                                                        ui.label(RichText::new("🛡️ SHA-256 Verified").size(10.5).color(Color32::from_rgb(74, 222, 128)).strong())
+                                                            .on_hover_text("Cryptographic SHA-256 checksum verified on the fly. 100% integrity guaranteed.");
+                                                    });
+                                            }
+                                        });
+                                    }
+                                    TransferState::InProgress => {
+                                        let speed_mb = (t.speed_bps as f64) / 1_048_576.0;
+                                        ui.label(
+                                            RichText::new(format!("⚡ {:.1} MB/s", speed_mb))
+                                                .color(if theme.is_dark { Color32::from_rgb(56, 189, 248) } else { Color32::from_rgb(2, 132, 199) })
+                                                .strong()
+                                                .size(13.0),
+                                        );
+                                    }
+                                    TransferState::PendingConfirmation => {
+                                        ui.label(RichText::new("⏳ Waiting for confirmation...").color(Color32::YELLOW).size(13.0));
+                                    }
+                                    TransferState::Failed(e) => {
+                                        ui.label(RichText::new(format!("❌ Failed: {}", e)).color(Color32::RED).size(12.0));
+                                    }
+                                    TransferState::Rejected => {
+                                        ui.label(RichText::new("⛔ Transfer rejected").color(Color32::RED).size(12.0));
+                                    }
+                                    TransferState::Canceled => {
+                                        ui.label(RichText::new("🛑 Canceled").color(theme.text_muted).size(12.0));
+                                    }
+                                }
+                            });
+                        });
+
+                        ui.add_space(8.0);
+
+                        // Middle row: File Icon, Detailed Filename, Size, and Buttons
+                        ui.horizontal(|ui| {
+                            ui.label(RichText::new(icon).size(24.0));
+                            ui.add_space(4.0);
+
+                            ui.vertical(|ui| {
+                                ui.label(
+                                    RichText::new(&t.current_file_name)
+                                        .size(15.0)
+                                        .strong()
+                                        .color(theme.text_primary),
+                                );
+
+                                let progress_pct = if t.total_bytes > 0 {
+                                    ((t.bytes_transferred as f64 / t.total_bytes as f64) * 100.0).clamp(0.0, 100.0) as u32
+                                } else {
+                                    100
+                                };
+
+                                let size_details = if t.state == TransferState::InProgress {
+                                    let speed = t.speed_bps.max(1);
+                                    let remaining_bytes = t.total_bytes.saturating_sub(t.bytes_transferred);
+                                    let eta_secs = remaining_bytes / speed;
+                                    let eta_str = if eta_secs < 60 {
+                                        format!("~{}s left", eta_secs)
+                                    } else if eta_secs < 3600 {
+                                        format!("~{}m {}s left", eta_secs / 60, eta_secs % 60)
+                                    } else {
+                                        format!("~{}h {}m left", eta_secs / 3600, (eta_secs % 3600) / 60)
+                                    };
+
+                                    let speed_mb = (t.speed_bps as f64) / 1_048_576.0;
+                                    format!(
+                                        "{} / {} ({}%) • ⚡ {:.1} MB/s • {}",
+                                        human_bytes(t.bytes_transferred as f64),
+                                        human_bytes(t.total_bytes as f64),
+                                        progress_pct,
+                                        speed_mb,
+                                        eta_str
+                                    )
+                                } else if is_done {
+                                    if t.checksum_verified {
+                                        format!("Delivered • Total Size: {} • 🛡️ SHA-256 Verified", human_bytes(t.total_bytes as f64))
+                                    } else {
+                                        format!("Delivered • Total Size: {}", human_bytes(t.total_bytes as f64))
+                                    }
+                                } else {
+                                    format!("Total Size: {}", human_bytes(t.total_bytes as f64))
+                                };
+
+                                ui.label(RichText::new(size_details).size(11.0).color(theme.text_muted));
+                            });
+
+                            if is_done {
+                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                    let target_file = self.download_dir.join(&t.current_file_name);
+                                    let exists = target_file.exists();
+                                    if ui
+                                        .add(
+                                            Button::new(RichText::new("📂 Show in Folder").strong().color(Color32::WHITE))
+                                                .fill(Color32::from_rgb(37, 99, 235))
+                                                .rounding(Rounding::same(6.0)),
+                                        )
+                                        .clicked()
+                                    {
+                                        if exists {
+                                            let _ = std::process::Command::new("explorer")
+                                                .args(["/select,", &target_file.to_string_lossy()])
+                                                .spawn();
+                                        } else {
+                                            let _ = std::process::Command::new("explorer").arg(&self.download_dir).spawn();
+                                        }
+                                    }
+
+                                    if exists && ui
+                                        .add(
+                                            Button::new(RichText::new("📄 Open").color(if theme.is_dark { Color32::WHITE } else { theme.text_primary }))
+                                                .fill(if theme.is_dark { Color32::from_rgb(51, 65, 85) } else { Color32::from_rgb(226, 232, 240) })
+                                                .rounding(Rounding::same(6.0)),
+                                        )
+                                        .clicked()
+                                    {
+                                        let _ = std::process::Command::new("explorer").arg(&target_file).spawn();
+                                    }
+                                });
+                            }
+                        });
+
+                        ui.add_space(8.0);
+
+                        // Progress Bar
+                        let progress_ratio = if t.total_bytes > 0 {
+                            (t.bytes_transferred as f32 / t.total_bytes as f32).clamp(0.0, 1.0)
+                        } else {
+                            1.0
+                        };
+
+                        let pb = ProgressBar::new(progress_ratio)
+                            .show_percentage()
+                            .fill(if is_done {
+                                Color32::from_rgb(16, 185, 129)
+                            } else {
+                                Color32::from_rgb(56, 189, 248)
+                            });
+                        ui.add(pb);
+                    });
+                ui.add_space(8.0);
+            }
+        });
+    }
+
+    fn render_settings_tab(&mut self, ui: &mut Ui, theme: ThemeColors) {
+        ScrollArea::vertical().show(ui, |ui| {
+            ui.heading(RichText::new("⚙️ Settings & Preferences").color(theme.text_primary));
+            ui.add_space(8.0);
+
+            Frame::none()
+                .fill(theme.bg_card)
+                .rounding(Rounding::same(10.0))
+                .stroke(theme.stroke_border)
+                .inner_margin(Margin::same(16.0))
+                .show(ui, |ui| {
+                    // Theme Mode Selector
+                    ui.label(RichText::new("🎨 Theme & Appearance").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    ui.horizontal(|ui| {
+                        let themes = [
+                            (ThemeMode::Auto, "🖥 Auto (System Theme)"),
+                            (ThemeMode::Dark, "🌙 Dark Theme"),
+                            (ThemeMode::Light, "☀️ Light Theme"),
+                        ];
+
+                        for (mode, label) in themes {
+                            let is_active = self.theme_mode == mode;
+                            let btn = Button::new(
+                                RichText::new(label)
+                                    .size(12.5)
+                                    .color(if is_active { Color32::WHITE } else { theme.text_secondary })
+                                    .strong(),
+                            )
+                            .fill(if is_active { Color32::from_rgb(37, 99, 235) } else { theme.bg_card_secondary })
+                            .rounding(Rounding::same(6.0))
+                            .min_size(Vec2::new(140.0, 32.0));
+
+                            if ui.add(btn).clicked() {
+                                self.theme_mode = mode;
+                                self.config.theme_mode = mode;
+                                self.persist_config();
+                            }
+                        }
+                    });
+
+                    ui.add_space(4.0);
+                    let current_status = match self.theme_mode {
+                        ThemeMode::Auto => {
+                            if is_system_dark_mode() {
+                                "Currently automatically matching Windows Dark Theme"
+                            } else {
+                                "Currently automatically matching Windows Light Theme"
+                            }
+                        }
+                        ThemeMode::Dark => "Always Dark Theme",
+                        ThemeMode::Light => "Always Light Theme",
+                    };
+                    ui.label(RichText::new(current_status).size(11.0).color(theme.text_muted));
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    ui.label(RichText::new("Device Name:").strong().color(theme.text_primary));
+                    if ui.text_edit_singleline(&mut self.custom_device_name).lost_focus() {
+                        self.persist_config();
+                    }
+
+                    ui.add_space(10.0);
+                    ui.label(RichText::new("Network Interface:").strong().color(theme.text_primary));
+
+                    let mut iface_changed = false;
+                    let ifaces = self.available_interfaces.clone();
+                    egui::ComboBox::from_id_salt("iface_combo")
+                        .selected_text(format!("{} - {}", self.current_iface.net_type.as_str(), self.current_iface.ip))
+                        .width(360.0)
+                        .show_ui(ui, |ui| {
+                            for iface in &ifaces {
+                                let label = format!("{} (IP: {})", iface.name, iface.ip);
+                                if ui.selectable_value(&mut self.current_iface, iface.clone(), label).changed() {
+                                    iface_changed = true;
+                                }
+                            }
+                        });
+
+                    if iface_changed {
+                        self.persist_config();
+                    }
+
+                    ui.add_space(10.0);
+                    ui.label(RichText::new("Download Location:").strong().color(theme.text_primary));
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new(format!("{:?}", self.download_dir)).color(theme.text_secondary));
+                        if ui.button("Change Folder...").clicked() {
+                            if let Some(dir) = FileDialog::new().pick_folder() {
+                                self.download_dir = dir;
+                                self.persist_config();
+                            }
+                        }
+                    });
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    // Folder Compression Settings
+                    ui.label(RichText::new("📦 Ultra-Fast Folder ZIP Compression").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    if ui
+                        .checkbox(
+                            &mut self.auto_zip_folders,
+                            "Compress folders into ZIP on the fly (10x faster for code, git, photo folders)",
+                        )
+                        .changed()
+                    {
+                        self.persist_config();
+                    }
+                    if ui
+                        .checkbox(
+                            &mut self.auto_extract_zip,
+                            "Automatically extract received ZIP folder archives into Downloads folder",
+                        )
+                        .changed()
+                    {
+                        self.persist_config();
+                    }
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    // Bandwidth Limiter Settings
+                    ui.label(RichText::new("🚀 Bandwidth Limiter (Upload Speed Cap)").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("Speed limit:").color(theme.text_secondary));
+                        if ui
+                            .add(
+                                egui::DragValue::new(&mut self.max_upload_speed_mbps)
+                                    .range(0..=5000)
+                                    .speed(1.0)
+                                    .custom_formatter(|n, _| {
+                                        if n == 0.0 {
+                                            "Unlimited (0 MB/s)".to_string()
+                                        } else {
+                                            format!("{:.0} MB/s", n)
+                                        }
+                                    }),
+                            )
+                            .changed()
+                        {
+                            self.persist_config();
+                        }
+
+                        ui.add_space(8.0);
+                        ui.label(
+                            RichText::new("(Enter 0 for unlimited, or type any custom MB/s)")
+                                .size(11.0)
+                                .color(theme.text_muted),
+                        );
+                    });
+
+                    ui.add_space(4.0);
+                    ui.horizontal(|ui| {
+                        ui.label(
+                            RichText::new("Quick presets:")
+                                .size(12.0)
+                                .color(theme.text_muted),
+                        );
+                        for preset in [0, 5, 10, 25, 50, 100] {
+                            let label = if preset == 0 {
+                                "Unlimited".to_string()
+                            } else {
+                                format!("{} MB/s", preset)
+                            };
+                            let is_current = self.max_upload_speed_mbps == preset;
+                            let btn = egui::Button::new(
+                                RichText::new(label).size(11.0).color(if is_current {
+                                    if theme.is_dark { Color32::from_rgb(56, 189, 248) } else { Color32::WHITE }
+                                } else {
+                                    theme.text_secondary
+                                }),
+                            )
+                            .fill(if is_current {
+                                Color32::from_rgb(37, 99, 235)
+                            } else {
+                                theme.bg_card_secondary
+                            });
+                            if ui.add(btn).clicked() {
+                                self.max_upload_speed_mbps = preset;
+                                self.persist_config();
+                            }
+                        }
+                    });
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    // Audio & Sound Notification Settings
+                    ui.label(RichText::new("🔔 Audio & Notifications").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    if ui
+                        .checkbox(
+                            &mut self.sound_notifications,
+                            "Play soft audio chime upon transfer completion",
+                        )
+                        .changed()
+                    {
+                        self.persist_config();
+                    }
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    // System Tray Options
+                    ui.label(RichText::new("🎛 Window & System Tray Behavior").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    if ui
+                        .checkbox(
+                            &mut self.close_to_tray,
+                            "Close to System Tray (keeps ZeroSend running in background)",
+                        )
+                        .changed()
+                    {
+                        self.persist_config();
+                    }
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    // Windows Startup Autostart
+                    ui.label(RichText::new("🚀 Windows Startup Behavior").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    ui.horizontal(|ui| {
+                        if self.autostart_enabled {
+                            ui.label(RichText::new("Status: Starts with Windows (Minimized to Tray)").color(Color32::from_rgb(34, 197, 94)));
+                            if ui.button("➖ Disable Autostart").clicked() {
+                                let _ = unregister_autostart();
+                                self.autostart_enabled = is_autostart_registered();
+                            }
+                        } else {
+                            ui.label(RichText::new("Status: Disabled").color(theme.text_muted));
+                            if ui.button("➕ Start with Windows (Tray)").clicked() {
+                                let _ = register_autostart();
+                                self.autostart_enabled = is_autostart_registered();
+                            }
+                        }
+                    });
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+
+
+                    // PIN Security Settings
+                    ui.label(RichText::new("🔒 Security / Anti-Spam PIN Protection").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+                    if ui
+                        .checkbox(
+                            &mut self.require_pin,
+                            "Require PIN code for incoming files and text messages",
+                        )
+                        .changed()
+                    {
+                        self.persist_config();
+                    }
+
+                    if self.require_pin {
+                        ui.horizontal(|ui| {
+                            ui.label(RichText::new("4-Digit PIN Code:").color(theme.text_secondary));
+                            if ui
+                                .add(
+                                    egui::TextEdit::singleline(&mut self.pin_code)
+                                        .password(true)
+                                        .desired_width(80.0),
+                                )
+                                .changed()
+                            {
+                                self.persist_config();
+                            }
+                        });
+                    }
+
+                    ui.add_space(12.0);
+                    ui.separator();
+                    ui.add_space(8.0);
+
+                    // Gitea Updates & Sync Settings
+                    ui.label(RichText::new("🔄 Gitea Updates & Repository").strong().color(theme.text_primary));
+                    ui.add_space(4.0);
+
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("Gitea Repo:").color(theme.text_secondary));
+                        if ui.link(RichText::new(GITEA_DEFAULT_REPO_URL).color(Color32::from_rgb(56, 189, 248))).clicked() {
+                            let _ = std::process::Command::new("explorer").arg(GITEA_DEFAULT_REPO_URL).spawn();
+                        }
+                    });
+
+                    ui.add_space(4.0);
+                    if ui
+                        .checkbox(
+                            &mut self.check_updates_on_startup,
+                            "Automatically check for updates on application startup",
+                        )
+                        .changed()
+                    {
+                        self.config.check_updates_on_startup = self.check_updates_on_startup;
+                        self.persist_config();
+                    }
+
+                    ui.add_space(6.0);
+                    let mut check_clicked = false;
+                    ui.horizontal(|ui| {
+                        let check_btn = Button::new(
+                            RichText::new(if self.is_checking_update { "⏳ Checking Gitea..." } else { "🔍 Check for Updates Now" })
+                                .color(theme.text_primary)
+                        )
+                        .fill(theme.bg_card_secondary)
+                        .rounding(Rounding::same(6.0));
+
+                        if ui.add_enabled(!self.is_checking_update, check_btn).clicked() {
+                            check_clicked = true;
+                        }
+
+                        if let Some(msg) = &self.update_check_status_msg {
+                            ui.label(RichText::new(msg).size(12.0).color(theme.text_muted));
+                        }
+                    });
+
+                    if check_clicked {
+                        self.trigger_update_check();
+                    }
+
+                    // Show active update info / download card
+                    let mut trigger_install_url = None;
+                    let mut open_gitea_url = None;
+
+                    if let Some(info) = &self.update_info {
+                        if info.has_update {
+                            ui.add_space(8.0);
+                            Frame::none()
+                                .fill(if theme.is_dark { Color32::from_rgb(17, 36, 26) } else { Color32::from_rgb(236, 253, 245) })
+                                .stroke(Stroke::new(1.0_f32, Color32::from_rgb(34, 197, 94)))
+                                .rounding(Rounding::same(8.0))
+                                .inner_margin(Margin::same(12.0))
+                                .show(ui, |ui| {
+                                    ui.horizontal(|ui| {
+                                        ui.label(RichText::new("✨ New Version Available:").strong().color(Color32::from_rgb(34, 197, 94)));
+                                        ui.label(RichText::new(format!("v{}", info.latest_version)).strong().size(14.0).color(theme.text_primary));
+                                        ui.label(RichText::new(format!("(Current: v{})", info.current_version)).size(11.0).color(theme.text_muted));
+                                    });
+
+                                    if !info.release_notes.is_empty() {
+                                        ui.add_space(4.0);
+                                        ui.label(RichText::new(&info.release_notes).size(11.5).color(theme.text_secondary));
+                                    }
+
+                                    ui.add_space(8.0);
+                                    if self.is_updating {
+                                        if let Some(prog) = &self.update_progress {
+                                            match prog {
+                                                UpdateProgress::Downloading { percent, downloaded, total } => {
+                                                    let pct_100 = (percent * 100.0) as u32;
+                                                    ui.label(
+                                                        RichText::new(format!("Downloading update: {} / {} ({}%)", human_bytes(*downloaded as f64), human_bytes(*total as f64), pct_100))
+                                                            .size(11.5)
+                                                            .color(theme.text_primary)
+                                                    );
+                                                    ui.add(ProgressBar::new(*percent).animate(true));
+                                                }
+                                                UpdateProgress::Verifying => {
+                                                    ui.label(RichText::new("🛡️ Verifying downloaded binary...").color(Color32::from_rgb(56, 189, 248)));
+                                                }
+                                                UpdateProgress::Installing => {
+                                                    ui.label(RichText::new("⚡ Installing update and restarting ZeroSend...").color(Color32::from_rgb(34, 197, 94)).strong());
+                                                }
+                                                UpdateProgress::Completed => {
+                                                    ui.label(RichText::new("🎉 Update completed! Relaunching...").color(Color32::from_rgb(34, 197, 94)).strong());
+                                                }
+                                                UpdateProgress::Error(err) => {
+                                                    ui.label(RichText::new(format!("❌ Update failed: {}", err)).color(Color32::from_rgb(239, 68, 68)));
+                                                }
+                                            }
+                                        }
+                                    } else {
+                                        ui.horizontal(|ui| {
+                                            if let Some(dl_url) = &info.download_url {
+                                                let install_btn = Button::new(
+                                                    RichText::new("🚀 Download & Install Update Now")
+                                                        .strong()
+                                                        .color(Color32::WHITE)
+                                                )
+                                                .fill(Color32::from_rgb(34, 197, 94))
+                                                .rounding(Rounding::same(6.0));
+
+                                                if ui.add(install_btn).clicked() {
+                                                    trigger_install_url = Some(dl_url.clone());
+                                                }
+                                            }
+
+                                            let gitea_btn = Button::new(
+                                                RichText::new("🌐 View on Gitea")
+                                                    .color(theme.text_primary)
+                                            )
+                                            .fill(theme.bg_card_secondary)
+                                            .rounding(Rounding::same(6.0));
+
+                                            if ui.add(gitea_btn).clicked() {
+                                                open_gitea_url = Some(info.gitea_url.clone());
+                                            }
+                                        });
+                                    }
+                                });
+                        }
+                    }
+
+                    if let Some(dl) = trigger_install_url {
+                        self.trigger_install_update(dl);
+                    }
+                    if let Some(g_url) = open_gitea_url {
+                        let _ = std::process::Command::new("explorer").arg(&g_url).spawn();
+                    }
+                });
+
+            ui.add_space(14.0);
+
+            // Collapsible Credits & About Card
+            egui::CollapsingHeader::new(RichText::new("👥 About & Credits").strong().size(14.0).color(theme.text_primary))
+                .default_open(false)
+                .show(ui, |ui| {
+                    Frame::none()
+                        .fill(theme.bg_card)
+                        .rounding(Rounding::same(10.0))
+                        .stroke(theme.stroke_border)
+                        .inner_margin(Margin::same(16.0))
+                        .show(ui, |ui| {
+                            ui.horizontal(|ui| {
+                                ui.label(RichText::new("⚡ ZeroSend").size(16.0).strong().color(theme.text_accent));
+                                ui.label(RichText::new("v2.4.1").size(13.0).color(Color32::from_rgb(34, 197, 94)).strong());
+                            });
+                            ui.add_space(4.0);
+                            ui.label(RichText::new("Fast, peer-to-peer file & text sharing optimized for ZeroTier, Tailscale, Radmin VPN & LAN.").color(theme.text_secondary));
+                            ui.add_space(8.0);
+
+                            ui.label(RichText::new("🛠 Developed by:").strong().color(theme.text_primary));
+                            ui.label(RichText::new(" • RarDog (Idea, Requirements & Direction)").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Antigravity (Google DeepMind AI Coding Assistant)").color(theme.text_secondary));
+
+                            ui.add_space(6.0);
+                            ui.label(RichText::new("⚙ Technology Stack:").strong().color(theme.text_primary));
+                            ui.label(RichText::new(" • Rust 1.98, Tokio Async Runtime, Axum HTTP Streaming").color(theme.text_secondary));
+                            ui.label(RichText::new(" • HTTP 206 Partial Content Media Streaming & Real-time Seeking").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Full Portable Exe-Folder Configuration & Data Storage").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Embedded Lightweight Vim Code & Text Viewer").color(theme.text_secondary));
+                            ui.label(RichText::new(" • SHA-256 On-The-Fly Cryptographic File Integrity Verification").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Mobile Web PWA with Thumbnails & Voice Notes Recorder").color(theme.text_secondary));
+                            ui.label(RichText::new(" • 4-Stream Parallel Chunk Worker Engine (Multi-stream Range transfers)").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Resumable .zerosend_part File Checkpointing Engine").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Token-Bucket Bandwidth Rate Limiter & Priority Discovery").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Egui & Eframe Desktop GUI Engine with Dynamic Dark/Light Themes").color(theme.text_secondary));
+                            ui.label(RichText::new(" • Zip Fast Deflate Streaming Compression Engine").color(theme.text_secondary));
+                            ui.label(RichText::new(" • UDP Broadcast ZeroTier Mesh Discovery Engine").color(theme.text_secondary));
+                        });
+                });
+
+            ui.add_space(8.0);
+
+            // Collapsible Version History / Changelog Card
+            egui::CollapsingHeader::new(RichText::new("📜 Version History (Changelog)").strong().size(14.0).color(theme.text_primary))
+                .default_open(false)
+                .show(ui, |ui| {
+                    Frame::none()
+                        .fill(theme.bg_card_secondary)
+                        .rounding(Rounding::same(8.0))
+                        .stroke(theme.stroke_border)
+                        .inner_margin(Margin::same(14.0))
+                        .show(ui, |ui| {
+                            // v2.4.1
+                            ui.horizontal(|ui| {
+                                ui.label(RichText::new("v2.4.1").strong().color(Color32::from_rgb(34, 197, 94)));
+                                ui.label(RichText::new("(Current Release)").size(11.0).color(Color32::GRAY));
+                            });
+                            ui.label(" • 📁 Shared Folders Tab: Dedicated Shared Folders management with Read-Only / Read-Write permissions and PIN security.");
+                            ui.label(" • 🎬 HTTP 206 Streaming: Instant real-time video/audio streaming with seeking without downloading entire files.");
+                            ui.label(" • ⚡ Built-in Vim Code Viewer: Terminal-style code viewer with full Vim keybindings, search (/), and line jump.");
+                            ui.label(" • 📦 Single-Folder Portable Mode: All settings (config.json) and downloads are created & saved right in the exe folder.");
+                            ui.label(" • 🔄 Auto-Sync: Real-time discovery beacon broadcasting of shared folders when connecting to ZeroTier/VPN.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v2.4.0
+                            ui.horizontal(|ui| {
+                                ui.label(RichText::new("v2.4.0").strong().color(Color32::from_rgb(56, 189, 248)));
+                            });
+                            ui.label(" • 🛡️ SHA-256 Checksum on the Fly: File integrity calculation & verification during streaming with green verification badges.");
+                            ui.label(" • 📸 Mobile Media Previews: Thumbnail gallery previews for photos with instant remove buttons before uploading.");
+                            ui.label(" • 🎙️ Mobile Voice Notes: Built-in voice recorder with live audio wave pulse animation and one-tap delivery.");
+                            ui.label(" • 📲 PWA Support: Web App Manifest & Add to Home Screen standalone install capabilities for mobile browsers.");
+                            ui.label(" • 🎨 Auto Theme: Dark/Light theme mode with Windows Registry theme sync & contrast fixes.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v2.3.2
+                            ui.horizontal(|ui| {
+                                ui.label(RichText::new("v2.3.2").strong().color(Color32::from_rgb(56, 189, 248)));
+                            });
+                            ui.label(" • 🚀 Start with Windows: Option to run ZeroSend on Windows startup minimized to tray.");
+                            ui.label(" • 🎯 Drag & Drop Quick Send: Drag files directly onto any friend's card in Nearby tab.");
+                            ui.label(" • Dual Web Links with dedicated QR codes (ZeroTier/VPN mesh + Local Wi-Fi router).");
+                            ui.label(" • ZeroTier Web Confirmation popup on PC (Auto-accept on Local LAN).");
+                            ui.label(" • Auto-switch to Transfers view on both PC and mobile when transfers begin.");
+                            ui.label(" • Exponential Moving Average (EMA) smoothed speed calculations (no spikes).");
+                            ui.label(" • 4-Stream Parallel Chunk Transfers with Adaptive Chunk Sizing.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v2.3.1
+                            ui.horizontal(|ui| {
+                                ui.label(RichText::new("v2.3.1").strong().color(Color32::from_rgb(34, 197, 94)));
+                            });
+                            ui.label(" • Redesigned Mobile-First Web Dropzone (camera/photo quick shortcuts, mobile UX).");
+                            ui.label(" • Dual Web Links with dedicated QR codes (ZeroTier/VPN mesh + Local Wi-Fi router).");
+                            ui.label(" • ZeroTier Web Confirmation popup on PC (Auto-accept on Local LAN).");
+                            ui.label(" • Auto-switch to Transfers view on both PC and mobile when transfers begin.");
+                            ui.label(" • Exponential Moving Average (EMA) smoothed speed calculations (no spikes).");
+                            ui.label(" • Live folder compression status (shows 'Compressing to ZIP' in Transfers).");
+                            ui.label(" • Smart Dropzone with colored category badges (Video, Audio, Docs, Binaries).");
+                            ui.label(" • 4-Stream Parallel Chunk Transfers with Adaptive Chunk Sizing.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v2.0.0
+                            ui.label(RichText::new("v2.0.0").strong().color(Color32::from_rgb(56, 189, 248)));
+                            ui.label(" • Redesigned modern Glassmorphism Web & Mobile dropzone dashboard.");
+                            ui.label(" • Web Quick Text sender & mobile-responsive drag-and-drop.");
+                            ui.label(" • Fixed global Ctrl+V screenshot pasting with retry mechanism.");
+                            ui.label(" • Real-time upload streaming progress & speed meters for sender.");
+                            ui.label(" • Permanent purge for 'Clear finished' transfers.");
+                            ui.label(" • Peer deduplication & persistent device UUIDs.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v1.2.1
+                            ui.label(RichText::new("v1.2.1").strong().color(Color32::from_rgb(56, 189, 248)));
+                            ui.label(" • Real-time stream upload progress & live speed on sender side.");
+                            ui.label(" • Working 'Clear finished' button in Transfers tab.");
+                            ui.label(" • Persistent peer UUIDs & automatic peer deduplication (no duplicate ghosts).");
+                            ui.label(" • Official Windows PE Resource & Manifest embedding (zero false positives).");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v1.2.0
+                            ui.label(RichText::new("v1.2.0").strong().color(Color32::from_rgb(56, 189, 248)));
+                            ui.label(" • Crystal-clear transfer visualization, file icons & live speed meters.");
+                            ui.label(" • Fixed incoming transfer confirmation popup & robust message delivery.");
+                            ui.label(" • Fixed System Tray background listener and instant exit.");
+                            ui.label(" • On-the-fly fast ZIP compression for directories (10x faster).");
+                            ui.label(" • Automatic ZIP extraction in receiver download directory.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v1.1.0
+                            ui.label(RichText::new("v1.1.0").strong().color(Color32::from_rgb(56, 189, 248)));
+                            ui.label(" • System Tray integration with background daemon and tray menu.");
+                            ui.label(" • Window size & layout auto-save (memory).");
+                            ui.label(" • Collapsible About, Credits & Version History section.");
+                            ui.label(" • Polish and performance improvements.");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v1.0.0
+                            ui.label(RichText::new("v1.0.0").strong().color(Color32::GRAY));
+                            ui.label(" • Native Desktop GUI (no terminal console window).");
+                            ui.label(" • Multi-recipient parallel file & text broadcasting.");
+                            ui.label(" • Smart Clipboard with content auto-detection (IP, URL, Code, JSON).");
+                            ui.label(" • QR Code generator for mobile file dropzone.");
+                            ui.label(" • 4-digit PIN security protection for incoming transfers.");
+                            ui.label(" • Global Drag-and-Drop files directly into the window.");
+                            ui.label(" • Ctrl+V screenshot/clipboard image pasting.");
+                            ui.label(" • 'Open file' and 'Show in folder' buttons in Transfers.");
+                            ui.label(" • Custom peer nicknames (aliases) saved in config.");
+                            ui.label(" • Windows Explorer context menu ('Send with ZeroSend').");
+                            ui.add_space(8.0);
+                            ui.separator();
+                            ui.add_space(8.0);
+
+                            // v0.1.0
+                            ui.label(RichText::new("v0.1.0").strong().color(Color32::GRAY));
+                            ui.label(" • Initial ZeroTier & VPN network interface scanner.");
+                            ui.label(" • UDP broadcast peer discovery engine.");
+                            ui.label(" • High-speed HTTP streaming transfer engine.");
+                            ui.label(" • Terminal UI (TUI) and headless CLI daemon.");
+                        });
+                });
+
+            ui.add_space(14.0);
+        });
+    }
+
+    fn render_modals(&mut self, ctx: &egui::Context, theme: ThemeColors) {
+        // Direct IP Modal
+        if self.show_direct_ip_modal {
+            egui::Window::new("🔍 Direct Connect (IP)")
+                .collapsible(false)
+                .resizable(false)
+                .anchor(egui::Align2::CENTER_CENTER, Vec2::ZERO)
+                .show(ctx, |ui| {
+                    ui.label(RichText::new("Enter ZeroTier / Tailscale / Radmin IP of peer:").color(theme.text_primary));
+                    ui.add_space(4.0);
+                    ui.text_edit_singleline(&mut self.direct_ip_input);
+
+                    if !self.direct_ip_status.is_empty() {
+                        ui.add_space(4.0);
+                        ui.label(RichText::new(&self.direct_ip_status).size(11.0).color(Color32::YELLOW));
+                    }
+
+                    ui.add_space(12.0);
+                    ui.horizontal(|ui| {
+                        if ui.add(Button::new(RichText::new("Connect & Ping").strong().color(Color32::WHITE)).fill(Color32::from_rgb(37, 99, 235))).clicked() {
+                            let ip = self.direct_ip_input.trim().to_string();
+                            if !ip.is_empty() {
+                                let client = self.client.clone();
+                                let peers_store = self.discovery_peers.clone();
+                                let log_tx = self.log_tx.clone();
+
+                                self.direct_ip_status = "Connecting...".to_string();
+
+                                tokio::spawn(async move {
+                                    match client.ping_peer(&ip, 53318).await {
+                                        Ok(beacon) => {
+                                            let _ = log_tx.send(format!("✨ Added direct node: {} ({})", beacon.name, beacon.ip));
+                                            let mut peers = peers_store.write().await;
+                                            peers.insert(
+                                                beacon.peer_id.clone(),
+                                                PeerInfo {
+                                                    peer_id: beacon.peer_id,
+                                                    name: beacon.name,
+                                                    os: beacon.os,
+                                                    ip: beacon.ip,
+                                                    transfer_port: beacon.transfer_port,
+                                                    net_type: beacon.net_type,
+                                                    version: beacon.version,
+                                                    last_seen: chrono::Utc::now(),
+                                                    is_online: true,
+                                                    ping_ms: None,
+                                                    shared_folders: beacon.shared_folders,
+                                                },
+                                            );
+                                        }
+                                        Err(e) => {
+                                            let _ = log_tx.send(format!("❌ Direct connect error: {}", e));
+                                        }
+                                    }
+                                });
+                                self.show_direct_ip_modal = false;
+                            }
+                        }
+
+                        if ui.button("Cancel").clicked() {
+                            self.show_direct_ip_modal = false;
+                        }
+                    });
+                });
+        }
+
+        // Rename Peer Modal
+        if let Some((peer_id, peer_name, mut current_alias)) = self.renaming_peer.clone() {
+            egui::Window::new("✏️ Rename Friend / Set Alias")
+                .collapsible(false)
+                .resizable(false)
+                .anchor(egui::Align2::CENTER_CENTER, Vec2::ZERO)
+                .show(ctx, |ui| {
+                    ui.label(RichText::new(format!("Set custom nickname for {}", peer_name)).color(theme.text_primary));
+                    ui.add_space(6.0);
+                    ui.text_edit_singleline(&mut current_alias);
+                    ui.add_space(10.0);
+
+                    ui.horizontal(|ui| {
+                        if ui.add(Button::new(RichText::new("Save Alias").strong().color(Color32::WHITE)).fill(Color32::from_rgb(37, 99, 235))).clicked() {
+                            if current_alias.trim().is_empty() {
+                                self.config.peer_aliases.remove(&peer_id);
+                            } else {
+                                self.config.peer_aliases.insert(peer_id.clone(), current_alias.trim().to_string());
+                            }
+                            self.persist_config();
+                            self.renaming_peer = None;
+                        }
+
+                        if ui.button("Cancel").clicked() {
+                            self.renaming_peer = None;
+                        }
+                    });
+                });
+        }
+
+        // Received Quick Text Modal
+        if let Some(msg) = self.received_text_modal.clone() {
+            let (r, g, b) = msg.content_type.badge_color_rgb();
+            egui::Window::new("📋 Received Quick Text")
+                .collapsible(false)
+                .resizable(true)
+                .min_width(400.0)
+                .anchor(egui::Align2::CENTER_CENTER, Vec2::ZERO)
+                .show(ctx, |ui| {
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new(format!("From: {}", msg.sender_name)).strong().size(14.0).color(theme.text_primary));
+                        ui.label(
+                            RichText::new(format!("[{}]", msg.content_type.label()))
+                                .strong()
+                                .color(Color32::from_rgb(r, g, b)),
+                        );
+                    });
+
+                    ui.add_space(8.0);
+
+                    Frame::none()
+                        .fill(theme.bg_card_secondary)
+                        .rounding(Rounding::same(6.0))
+                        .stroke(theme.stroke_border)
+                        .inner_margin(Margin::same(12.0))
+                        .show(ui, |ui| {
+                            ScrollArea::vertical().max_height(200.0).show(ui, |ui| {
+                                ui.label(
+                                    RichText::new(&msg.content)
+                                        .monospace()
+                                        .color(theme.text_primary),
+                                );
+                            });
+                        });
+
+                    ui.add_space(12.0);
+                    ui.horizontal(|ui| {
+                        let content_copy = msg.content.clone();
+                        if ui.add(Button::new(RichText::new("📋 Copy to Clipboard").strong().color(Color32::WHITE)).fill(Color32::from_rgb(37, 99, 235))).clicked() {
+                            ui.output_mut(|o| o.copied_text = content_copy.clone());
+                        }
+
+                        if msg.content_type == ContentType::WebUrl {
+                            if ui.button("🌐 Open Link").clicked() {
+                                ui.ctx().open_url(egui::OpenUrl::same_tab(&content_copy));
+                            }
+                        }
+
+                        ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                            if ui.button("Close").clicked() {
+                                self.received_text_modal = None;
+                            }
+                        });
+                    });
+                });
+        }
+
+        // PROMINENT INCOMING FILE TRANSFER CONFIRMATION MODAL
+        if let Some(req) = self.pending_request.clone() {
+            egui::Window::new("📥 INCOMING FILE TRANSFER REQUEST")
+                .collapsible(false)
+                .resizable(false)
+                .min_width(450.0)
+                .anchor(egui::Align2::CENTER_CENTER, Vec2::ZERO)
+                .show(ctx, |ui| {
+                    ui.add_space(4.0);
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("📥").size(32.0));
+                        ui.vertical(|ui| {
+                            ui.label(
+                                RichText::new(format!("Incoming files from: {}", req.sender_name))
+                                    .size(17.0)
+                                    .strong()
+                                    .color(theme.text_accent),
+                            );
+                            ui.label(
+                                RichText::new(format!(
+                                    "Total: {} file(s) • Total Size: {}",
+                                    req.files.len(),
+                                    human_bytes(req.total_size as f64)
+                                ))
+                                .size(12.0)
+                                .color(theme.text_secondary),
+                            );
+                        });
+                    });
+
+                    ui.add_space(10.0);
+                    ui.label(RichText::new("Items to be received:").strong().size(13.0).color(theme.text_primary));
+                    ui.add_space(4.0);
+
+                    Frame::none()
+                        .fill(theme.bg_card_secondary)
+                        .rounding(Rounding::same(8.0))
+                        .stroke(theme.stroke_border)
+                        .inner_margin(Margin::same(10.0))
+                        .show(ui, |ui| {
+                            ScrollArea::vertical().max_height(140.0).show(ui, |ui| {
+                                for f in req.files.iter().take(8) {
+                                    let item_icon = get_file_icon(&f.name);
+                                    ui.horizontal(|ui| {
+                                        ui.label(item_icon);
+                                        ui.label(RichText::new(&f.name).color(theme.text_primary).strong());
+                                        ui.label(RichText::new(format!("({})", human_bytes(f.size as f64))).size(11.0).color(theme.text_muted));
+                                    });
+                                    ui.separator();
+                                }
+                                if req.files.len() > 8 {
+                                    ui.label(RichText::new(format!(" ... and {} more files", req.files.len() - 8)).color(theme.text_muted));
+                                }
+                            });
+                        });
+
+                    ui.add_space(8.0);
+                    ui.horizontal(|ui| {
+                        ui.label(RichText::new("Save destination:").size(11.0).color(theme.text_muted));
+                        ui.label(RichText::new(format!("{:?}", self.download_dir)).size(11.0).color(theme.text_secondary));
+                    });
+
+                    ui.add_space(16.0);
+                    ui.horizontal(|ui| {
+                        let accept_btn = Button::new(
+                            RichText::new("✅ ACCEPT & DOWNLOAD")
+                                .size(14.0)
+                                .strong()
+                                .color(Color32::WHITE),
+                        )
+                        .fill(Color32::from_rgb(34, 197, 94))
+                        .min_size(Vec2::new(190.0, 42.0))
+                        .rounding(Rounding::same(8.0));
+
+                        if ui.add(accept_btn).clicked() {
+                            let server_clone = self.server.clone();
+                            let session_id = req.session_id.clone();
+
+                            let initial_progress = TransferProgress {
+                                session_id: session_id.clone(),
+                                peer_name: req.sender_name.clone(),
+                                is_incoming: true,
+                                current_file_index: 0,
+                                total_files: req.files.len(),
+                                current_file_name: req.files.first().map(|f| f.name.clone()).unwrap_or_default(),
+                                bytes_transferred: 0,
+                                total_bytes: req.total_size,
+                                speed_bps: 0,
+                                state: TransferState::InProgress,
+                                checksum_verified: false,
+                            };
+
+                            if let Some(pos) = self.transfers.iter().position(|x| x.session_id == session_id) {
+                                self.transfers[pos] = initial_progress;
+                            } else {
+                                self.transfers.insert(0, initial_progress);
+                            }
+
+                            tokio::spawn(async move {
+                                server_clone.accept_transfer(&session_id).await;
+                            });
+                            self.pending_request = None;
+                            self.current_tab = Tab::Transfers;
+                        }
+
+                        let reject_btn = Button::new(
+                            RichText::new("❌ DECLINE")
+                                .size(14.0)
+                                .strong()
+                                .color(Color32::WHITE),
+                        )
+                        .fill(Color32::from_rgb(239, 68, 68))
+                        .min_size(Vec2::new(130.0, 42.0))
+                        .rounding(Rounding::same(8.0));
+
+                        if ui.add(reject_btn).clicked() {
+                            let server_clone = self.server.clone();
+                            let session_id = req.session_id.clone();
+                            tokio::spawn(async move {
+                                server_clone.reject_transfer(&session_id).await;
+                            });
+                            self.pending_request = None;
+                        }
+                    });
+                    ui.add_space(4.0);
+                });
+        }
+
+        self.vim_viewer.render(ctx, theme);
+    }
+
+    pub fn trigger_update_check(&mut self) {
+        self.is_checking_update = true;
+        self.update_check_status_msg = Some("Connecting to Gitea and checking for updates...".to_string());
+        let tx = self.update_tx.clone();
+        let api_url = self.config.gitea_api_url.clone();
+        tokio::spawn(async move {
+            let res = check_gitea_update(api_url.as_deref()).await;
+            let _ = tx.send(res);
+        });
+    }
+
+    pub fn trigger_install_update(&mut self, download_url: String) {
+        self.is_updating = true;
+        self.update_progress = Some(UpdateProgress::Downloading { percent: 0.0, downloaded: 0, total: 0 });
+        let prog_tx = self.update_prog_tx.clone();
+        tokio::spawn(async move {
+            perform_update_download(download_url, prog_tx).await;
+        });
+    }
+}
+
+impl eframe::App for ZeroSendApp {
+    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
+        self.poll_events(ctx);
+
+        if ctx.input(|i| i.viewport().close_requested()) {
+            if self.close_to_tray {
+                ctx.send_viewport_cmd(egui::ViewportCommand::CancelClose);
+                ctx.send_viewport_cmd(egui::ViewportCommand::Visible(false));
+            }
+        }
+
+        let cur_size = ctx.screen_rect().size();
+        if cur_size.x >= 700.0 && cur_size.y >= 450.0 {
+            if (self.config.window_width - cur_size.x).abs() > 10.0
+                || (self.config.window_height - cur_size.y).abs() > 10.0
+            {
+                self.config.window_width = cur_size.x;
+                self.config.window_height = cur_size.y;
+                if self.last_window_save.elapsed() > Duration::from_secs(2) {
+                    self.last_window_save = Instant::now();
+                    let _ = self.config.save();
+                }
+            }
+        }
+
+        let dropped_files = ctx.input(|i| i.raw.dropped_files.clone());
+        if !dropped_files.is_empty() {
+            let mut added_count = 0;
+            for file in dropped_files {
+                if let Some(path) = file.path {
+                    if !self.queued_files.contains(&path) {
+                        self.queued_files.push(path);
+                        added_count += 1;
+                    }
+                }
+            }
+            if added_count > 0 {
+                self.current_tab = Tab::Send;
+                self.send_mode = SendMode::Files;
+                self.logs.push(format!("📥 Added {} dropped item(s) to send queue", added_count));
+            }
+        }
+
+        let is_paste = ctx.input(|i| (i.modifiers.ctrl || i.modifiers.command) && i.key_pressed(egui::Key::V));
+        if is_paste && !ctx.wants_keyboard_input() {
+            self.try_paste_clipboard_image();
+        }
+
+        let is_dark = match self.theme_mode {
+            ThemeMode::Auto => is_system_dark_mode(),
+            ThemeMode::Dark => true,
+            ThemeMode::Light => false,
+        };
+        let theme = ThemeColors::new(is_dark);
+
+        let mut style = (*ctx.style()).clone();
+        style.visuals.dark_mode = is_dark;
+        style.visuals.panel_fill = theme.bg_app;
+        style.visuals.window_fill = theme.bg_card;
+        style.visuals.override_text_color = Some(theme.text_primary);
+        style.visuals.widgets.noninteractive.bg_fill = theme.bg_card;
+        style.visuals.widgets.inactive.bg_fill = theme.bg_card_secondary;
+        style.visuals.widgets.inactive.rounding = Rounding::same(6.0);
+        style.visuals.widgets.hovered.bg_fill = theme.bg_hover;
+        style.visuals.widgets.hovered.rounding = Rounding::same(6.0);
+        style.visuals.widgets.active.bg_fill = Color32::from_rgb(37, 99, 235);
+        style.visuals.widgets.active.rounding = Rounding::same(6.0);
+        ctx.set_style(style);
+
+        SidePanel::left("sidebar_panel")
+            .resizable(false)
+            .exact_width(195.0)
+            .frame(
+                Frame::none()
+                    .fill(theme.bg_sidebar)
+                    .stroke(theme.stroke_subtle)
+                    .inner_margin(Margin::same(12.0)),
+            )
+            .show(ctx, |ui| {
+                self.render_sidebar(ctx, ui, theme);
+            });
+
+        CentralPanel::default()
+            .frame(
+                Frame::none()
+                    .fill(theme.bg_app)
+                    .inner_margin(Margin::same(20.0)),
+            )
+            .show(ctx, |ui| {
+                // Top Update Banner if update available on Gitea
+                if self.show_update_banner {
+                    if let Some(info) = &self.update_info {
+                        if info.has_update {
+                            let mut dismiss = false;
+                            let mut trigger_install = None;
+                            let mut open_gitea = false;
+                            let gitea_url = info.gitea_url.clone();
+                            let latest_ver = info.latest_version.clone();
+                            let download_url = info.download_url.clone();
+
+                            Frame::none()
+                                .fill(if theme.is_dark { Color32::from_rgb(17, 43, 31) } else { Color32::from_rgb(220, 252, 231) })
+                                .stroke(Stroke::new(1.0_f32, Color32::from_rgb(34, 197, 94)))
+                                .rounding(Rounding::same(8.0))
+                                .inner_margin(Margin::symmetric(14.0, 10.0))
+                                .show(ui, |ui| {
+                                    ui.horizontal(|ui| {
+                                        ui.label(RichText::new("✨").size(16.0));
+                                        ui.label(
+                                            RichText::new(format!("Update Available: ZeroSend v{} is out on Gitea!", latest_ver))
+                                                .strong()
+                                                .color(if theme.is_dark { Color32::WHITE } else { Color32::from_rgb(20, 83, 45) })
+                                        );
+
+                                        ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
+                                            if ui.button(RichText::new("✕").size(12.0).color(theme.text_muted)).clicked() {
+                                                dismiss = true;
+                                            }
+
+                                            if ui.button(RichText::new("🌐 View on Gitea").size(11.5)).clicked() {
+                                                open_gitea = true;
+                                            }
+
+                                            if let Some(dl) = download_url {
+                                                if !self.is_updating {
+                                                    let update_btn = Button::new(
+                                                        RichText::new("🚀 Update Now").strong().size(12.0).color(Color32::WHITE)
+                                                    )
+                                                    .fill(Color32::from_rgb(34, 197, 94))
+                                                    .rounding(Rounding::same(6.0));
+
+                                                    if ui.add(update_btn).clicked() {
+                                                        trigger_install = Some(dl);
+                                                    }
+                                                } else {
+                                                    ui.label(RichText::new("⏳ Updating...").color(Color32::from_rgb(34, 197, 94)).strong());
+                                                }
+                                            }
+                                        });
+                                    });
+                                });
+
+                            if dismiss {
+                                self.show_update_banner = false;
+                            }
+                            if open_gitea {
+                                let _ = std::process::Command::new("explorer").arg(&gitea_url).spawn();
+                            }
+                            if let Some(dl) = trigger_install {
+                                self.trigger_install_update(dl);
+                            }
+
+                            ui.add_space(10.0);
+                        }
+                    }
+                }
+
+                match self.current_tab {
+                    Tab::Nearby => self.render_nearby_tab(ui, theme),
+                    Tab::Send => self.render_send_tab(ui, theme),
+                    Tab::Receive => self.render_receive_tab(ui, theme),
+                    Tab::Shared => self.render_shared_tab(ui, theme),
+                    Tab::Transfers => self.render_transfers_tab(ui, theme),
+                    Tab::Settings => self.render_settings_tab(ui, theme),
+                }
+            });
+
+        self.render_modals(ctx, theme);
+
+        if self.transfers.iter().any(|t| t.state == TransferState::InProgress) || self.is_updating {
+            ctx.request_repaint_after(Duration::from_millis(50));
+        } else {
+            ctx.request_repaint_after(Duration::from_millis(200));
+        }
+    }
+}
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
new file mode 100644
index 0000000..71b68fd
--- /dev/null
+++ b/src/ui/mod.rs
@@ -0,0 +1,10 @@
+pub mod cli;
+pub mod gui;
+pub mod sound;
+pub mod tray;
+pub mod tui;
+pub mod vim_viewer;
+
+pub use cli::*;
+#[allow(unused_imports)]
+pub use sound::play_transfer_sound;
diff --git a/src/ui/sound.rs b/src/ui/sound.rs
new file mode 100644
index 0000000..a27b6bd
--- /dev/null
+++ b/src/ui/sound.rs
@@ -0,0 +1,13 @@
+#[cfg(windows)]
+#[link(name = "user32")]
+extern "system" {
+    fn MessageBeep(uType: u32) -> i32;
+}
+
+/// Play a subtle native Windows notification sound (AirDrop chime style)
+pub fn play_transfer_sound() {
+    #[cfg(windows)]
+    unsafe {
+        MessageBeep(0x00000040); // MB_ICONASTERISK
+    }
+}
diff --git a/src/ui/tray.rs b/src/ui/tray.rs
new file mode 100644
index 0000000..4331218
--- /dev/null
+++ b/src/ui/tray.rs
@@ -0,0 +1,138 @@
+use eframe::egui::Context;
+use std::path::PathBuf;
+use std::sync::mpsc::{channel, Receiver};
+use std::time::Duration;
+use tray_icon::{
+    menu::{Menu, MenuEvent, MenuItem, PredefinedMenuItem},
+    Icon, TrayIcon, TrayIconBuilder, TrayIconEvent,
+};
+
+pub struct SystemTrayManager {
+    _tray_icon: TrayIcon,
+    action_rx: Receiver<TrayAction>,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum TrayAction {
+    ShowWindow,
+    OpenDownloads,
+}
+
+impl SystemTrayManager {
+    pub fn new(
+        ctx: Context,
+        download_dir: PathBuf,
+    ) -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
+        let menu = Menu::new();
+        let show_item = MenuItem::new("⚡ Show ZeroSend", true, None);
+        let downloads_item = MenuItem::new("📁 Open Downloads Folder", true, None);
+        let quit_item = MenuItem::new("❌ Exit", true, None);
+
+        let show_id = show_item.id().clone();
+        let downloads_id = downloads_item.id().clone();
+        let quit_id = quit_item.id().clone();
+
+        menu.append_items(&[
+            &show_item,
+            &downloads_item,
+            &PredefinedMenuItem::separator(),
+            &quit_item,
+        ])?;
+
+        let icon = create_default_tray_icon()?;
+
+        let tray_icon = TrayIconBuilder::new()
+            .with_menu(Box::new(menu))
+            .with_tooltip("ZeroSend - P2P Mesh Sharing")
+            .with_icon(icon)
+            .build()?;
+
+        let (action_tx, action_rx) = channel::<TrayAction>();
+
+        // Spawn a dedicated listener thread to handle tray clicks & menu actions
+        let ctx_clone = ctx.clone();
+        let dl_dir = download_dir.clone();
+        let tx = action_tx.clone();
+
+        std::thread::spawn(move || {
+            loop {
+                // 1. Check Tray Icon Left Clicks
+                if let Ok(tray_event) = TrayIconEvent::receiver().try_recv() {
+                    match tray_event {
+                        TrayIconEvent::Click {
+                            button: tray_icon::MouseButton::Left,
+                            button_state: tray_icon::MouseButtonState::Up,
+                            ..
+                        }
+                        | TrayIconEvent::DoubleClick {
+                            button: tray_icon::MouseButton::Left,
+                            ..
+                        } => {
+                            let _ = tx.send(TrayAction::ShowWindow);
+                            ctx_clone.request_repaint();
+                        }
+                        _ => {}
+                    }
+                }
+
+                // 2. Check Tray Menu Items
+                if let Ok(menu_event) = MenuEvent::receiver().try_recv() {
+                    if menu_event.id == show_id {
+                        let _ = tx.send(TrayAction::ShowWindow);
+                        ctx_clone.request_repaint();
+                    } else if menu_event.id == downloads_id {
+                        let _ = std::process::Command::new("explorer").arg(&dl_dir).spawn();
+                        let _ = tx.send(TrayAction::OpenDownloads);
+                    } else if menu_event.id == quit_id {
+                        // Exit immediately
+                        std::process::exit(0);
+                    }
+                }
+
+                std::thread::sleep(Duration::from_millis(30));
+            }
+        });
+
+        Ok(Self {
+            _tray_icon: tray_icon,
+            action_rx,
+        })
+    }
+
+    /// Try receiving any pending tray actions
+    pub fn try_recv_action(&self) -> Option<TrayAction> {
+        self.action_rx.try_recv().ok()
+    }
+}
+
+fn create_default_tray_icon() -> Result<Icon, Box<dyn std::error::Error + Send + Sync>> {
+    let width = 32u32;
+    let height = 32u32;
+    let mut rgba = Vec::with_capacity((width * height * 4) as usize);
+
+    for y in 0..height {
+        for x in 0..height {
+            let dx = x as f32 - 15.5;
+            let dy = y as f32 - 15.5;
+            let dist = (dx * dx + dy * dy).sqrt();
+
+            if dist <= 14.0 {
+                if dist > 12.0 {
+                    // Cyan glowing ring
+                    rgba.extend_from_slice(&[56, 189, 248, 255]);
+                } else if dist <= 7.0 {
+                    // White center dot
+                    rgba.extend_from_slice(&[255, 255, 255, 255]);
+                } else {
+                    // Electric blue body
+                    rgba.extend_from_slice(&[37, 99, 235, 255]);
+                }
+            } else {
+                rgba.extend_from_slice(&[0, 0, 0, 0]);
+            }
+        }
+    }
+
+    let icon = Icon::from_rgba(rgba, width, height)?;
+    Ok(icon)
+}
diff --git a/src/ui/tui.rs b/src/ui/tui.rs
new file mode 100644
index 0000000..a4cf0cf
--- /dev/null
+++ b/src/ui/tui.rs
@@ -0,0 +1,672 @@
+use crate::network::{DiscoveryService, InterfaceInfo, PeerInfo};
+use crate::transfer::{
+    PrepareTransferRequest, TransferClient, TransferProgress, TransferServer, TransferState,
+};
+use crossterm::{
+    event::{self, Event, KeyCode, KeyEventKind},
+    execute,
+    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
+};
+use human_bytes::human_bytes;
+use ratatui::{
+    backend::CrosstermBackend,
+    layout::{Alignment, Constraint, Direction, Layout, Rect},
+    style::{Color, Modifier, Style},
+    text::{Line, Span},
+    widgets::{
+        Block, BorderType, Borders, Clear, List, ListItem, ListState, Paragraph, Wrap,
+    },
+    Frame, Terminal,
+};
+use std::io;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::{Duration, Instant};
+use tokio::sync::mpsc;
+
+pub enum ModalState {
+    None,
+    ConfirmTransfer(PrepareTransferRequest),
+    InputFilePath {
+        peer_url: String,
+        peer_name: String,
+        input: String,
+    },
+    InputDirectIp {
+        input: String,
+    },
+}
+
+pub struct AppState {
+    pub my_name: String,
+    pub iface: InterfaceInfo,
+    pub peers: Vec<PeerInfo>,
+    pub peer_list_state: ListState,
+    pub transfers: Vec<TransferProgress>,
+    pub logs: Vec<String>,
+    pub modal: ModalState,
+    pub should_quit: bool,
+}
+
+pub async fn run_tui(
+    discovery: DiscoveryService,
+    server: TransferServer,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    // 1. Setup Terminal
+    enable_raw_mode()?;
+    let mut stdout = io::stdout();
+    execute!(stdout, EnterAlternateScreen)?;
+    let backend = CrosstermBackend::new(stdout);
+    let mut terminal = Terminal::new(backend)?;
+
+    let server_state = server.state();
+    let my_info = discovery.my_info().clone();
+    let iface = discovery.selected_interface().clone();
+
+    let mut app = AppState {
+        my_name: my_info.name.clone(),
+        iface,
+        peers: Vec::new(),
+        peer_list_state: ListState::default(),
+        transfers: Vec::new(),
+        logs: vec![
+            "⚡ ZeroSend initialized".to_string(),
+            format!("📡 Listening on interface {} ({})", my_info.ip, my_info.net_type),
+            "🔍 UDP Peer Discovery active".to_string(),
+        ],
+        modal: ModalState::None,
+        should_quit: false,
+    };
+
+    let (log_tx, mut log_rx) = mpsc::unbounded_channel::<String>();
+    let (transfer_update_tx, mut transfer_update_rx) = mpsc::unbounded_channel::<TransferProgress>();
+
+    // Listen for server incoming transfer requests
+    let mut req_rx = server_state.incoming_request_events.subscribe();
+    let mut trans_rx = server_state.transfer_events.subscribe();
+
+    let client = Arc::new(TransferClient::new());
+    let peers_store = discovery.peers();
+
+    // Event Loop
+    let mut last_tick = Instant::now();
+    let tick_rate = Duration::from_millis(100);
+
+    while !app.should_quit {
+        // Refresh peer list from discovery
+        {
+            let peers_map = peers_store.read().await;
+            let mut list: Vec<PeerInfo> = peers_map.values().cloned().collect();
+            list.sort_by(|a, b| b.is_online.cmp(&a.is_online).then_with(|| a.name.cmp(&b.name)));
+            app.peers = list;
+
+            if !app.peers.is_empty() && app.peer_list_state.selected().is_none() {
+                app.peer_list_state.select(Some(0));
+            }
+        }
+
+        // Receive logs
+        while let Ok(msg) = log_rx.try_recv() {
+            app.logs.push(msg);
+            if app.logs.len() > 100 {
+                app.logs.remove(0);
+            }
+        }
+
+        // Receive transfer updates from client or server
+        while let Ok(t) = transfer_update_rx.try_recv() {
+            if let Some(pos) = app.transfers.iter().position(|x| x.session_id == t.session_id) {
+                app.transfers[pos] = t;
+            } else {
+                app.transfers.push(t);
+            }
+        }
+
+        while let Ok(t) = trans_rx.try_recv() {
+            if let Some(pos) = app.transfers.iter().position(|x| x.session_id == t.session_id) {
+                app.transfers[pos] = t;
+            } else {
+                app.transfers.push(t);
+            }
+        }
+
+        // Check for incoming confirmation requests
+        while let Ok(req) = req_rx.try_recv() {
+            app.logs.push(format!(
+                "📥 Transfer request from {} ({} files)",
+                req.sender_name,
+                req.files.len()
+            ));
+            app.modal = ModalState::ConfirmTransfer(req);
+        }
+
+        // Draw UI
+        terminal.draw(|f| draw_ui(f, &mut app))?;
+
+        // Handle Keys
+        let timeout = tick_rate
+            .checked_sub(last_tick.elapsed())
+            .unwrap_or_else(|| Duration::from_secs(0));
+
+        if event::poll(timeout)? {
+            if let Event::Key(key) = event::read()? {
+                if key.kind == KeyEventKind::Press {
+                    handle_key_event(
+                        key.code,
+                        &mut app,
+                        &server,
+                        &client,
+                        &my_info,
+                        &discovery,
+                        log_tx.clone(),
+                        transfer_update_tx.clone(),
+                    )
+                    .await;
+                }
+            }
+        }
+
+        if last_tick.elapsed() >= tick_rate {
+            last_tick = Instant::now();
+        }
+    }
+
+    // Restore terminal
+    disable_raw_mode()?;
+    execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
+    terminal.show_cursor()?;
+
+    Ok(())
+}
+
+async fn handle_key_event(
+    code: KeyCode,
+    app: &mut AppState,
+    server: &TransferServer,
+    client: &Arc<TransferClient>,
+    my_info: &crate::network::DiscoveryBeacon,
+    discovery: &DiscoveryService,
+    log_tx: mpsc::UnboundedSender<String>,
+    transfer_tx: mpsc::UnboundedSender<TransferProgress>,
+) {
+    match &mut app.modal {
+        ModalState::ConfirmTransfer(req) => {
+            let session_id = req.session_id.clone();
+            match code {
+                KeyCode::Char('y') | KeyCode::Char('Y') | KeyCode::Char('a') | KeyCode::Char('A') | KeyCode::Enter => {
+                    let _ = server.accept_transfer(&session_id).await;
+                    let _ = log_tx.send(format!("✅ Accepted transfer from {}", req.sender_name));
+                    app.modal = ModalState::None;
+                }
+                KeyCode::Char('n') | KeyCode::Char('N') | KeyCode::Char('r') | KeyCode::Char('R') | KeyCode::Esc => {
+                    let _ = server.reject_transfer(&session_id).await;
+                    let _ = log_tx.send(format!("❌ Rejected transfer from {}", req.sender_name));
+                    app.modal = ModalState::None;
+                }
+                _ => {}
+            }
+        }
+        ModalState::InputFilePath { peer_url, peer_name, input } => {
+            match code {
+                KeyCode::Enter => {
+                    let path_str = input.trim().to_string();
+                    if !path_str.is_empty() {
+                        let path = PathBuf::from(path_str.clone());
+                        let peer_url = peer_url.clone();
+                        let peer_name = peer_name.clone();
+                        let client_clone = client.clone();
+                        let my_info_clone = my_info.clone();
+                        let log_tx_clone = log_tx.clone();
+                        let transfer_tx_clone = transfer_tx.clone();
+
+                        tokio::spawn(async move {
+                            let _ = log_tx_clone.send(format!("📤 Sending {:?} to {}...", path, peer_name));
+                            let res = client_clone
+                                .send_files(&peer_url, &peer_name, &my_info_clone, &[path], true, 0, None, move |progress| {
+                                    let _ = transfer_tx_clone.send(progress);
+                                })
+                                .await;
+
+                            match res {
+                                Ok(_) => {
+                                    let _ = log_tx_clone.send(format!("🎉 Sent successfully to {}!", peer_name));
+                                }
+                                Err(e) => {
+                                    let _ = log_tx_clone.send(format!("⚠️ Send failed to {}: {}", peer_name, e));
+                                }
+                            }
+                        });
+                    }
+                    app.modal = ModalState::None;
+                }
+                KeyCode::Esc => {
+                    app.modal = ModalState::None;
+                }
+                KeyCode::Backspace => {
+                    input.pop();
+                }
+                KeyCode::Char(c) => {
+                    input.push(c);
+                }
+                _ => {}
+            }
+        }
+        ModalState::InputDirectIp { input } => {
+            match code {
+                KeyCode::Enter => {
+                    let ip_str = input.trim().to_string();
+                    if !ip_str.is_empty() {
+                        let client_clone = client.clone();
+                        let log_tx_clone = log_tx.clone();
+                        let disc_peers = discovery.peers();
+
+                        tokio::spawn(async move {
+                            let _ = log_tx_clone.send(format!("🔍 Pinging direct node at {}...", ip_str));
+                            match client_clone.ping_peer(&ip_str, 53318).await {
+                                Ok(beacon) => {
+                                    let _ = log_tx_clone.send(format!("✨ Found peer: {} ({})", beacon.name, beacon.ip));
+                                    let mut p_map = disc_peers.write().await;
+                                    p_map.insert(
+                                        beacon.peer_id.clone(),
+                                        PeerInfo {
+                                            peer_id: beacon.peer_id,
+                                            name: beacon.name,
+                                            os: beacon.os,
+                                            ip: beacon.ip,
+                                            transfer_port: beacon.transfer_port,
+                                            net_type: beacon.net_type,
+                                            version: beacon.version,
+                                            last_seen: chrono::Utc::now(),
+                                            is_online: true,
+                                            ping_ms: None,
+                                            shared_folders: beacon.shared_folders,
+                                        },
+                                    );
+                                }
+                                Err(e) => {
+                                    let _ = log_tx_clone.send(format!("❌ Direct ping error: {}", e));
+                                }
+                            }
+                        });
+                    }
+                    app.modal = ModalState::None;
+                }
+                KeyCode::Esc => {
+                    app.modal = ModalState::None;
+                }
+                KeyCode::Backspace => {
+                    input.pop();
+                }
+                KeyCode::Char(c) => {
+                    input.push(c);
+                }
+                _ => {}
+            }
+        }
+        ModalState::None => {
+            match code {
+                KeyCode::Char('q') | KeyCode::Char('Q') => {
+                    app.should_quit = true;
+                }
+                KeyCode::Up | KeyCode::Char('k') => {
+                    if !app.peers.is_empty() {
+                        let i = match app.peer_list_state.selected() {
+                            Some(i) => {
+                                if i == 0 {
+                                    app.peers.len() - 1
+                                } else {
+                                    i - 1
+                                }
+                            }
+                            None => 0,
+                        };
+                        app.peer_list_state.select(Some(i));
+                    }
+                }
+                KeyCode::Down | KeyCode::Char('j') => {
+                    if !app.peers.is_empty() {
+                        let i = match app.peer_list_state.selected() {
+                            Some(i) => {
+                                if i >= app.peers.len() - 1 {
+                                    0
+                                } else {
+                                    i + 1
+                                }
+                            }
+                            None => 0,
+                        };
+                        app.peer_list_state.select(Some(i));
+                    }
+                }
+                KeyCode::Char('s') | KeyCode::Char('S') => {
+                    if let Some(i) = app.peer_list_state.selected() {
+                        if let Some(peer) = app.peers.get(i) {
+                            app.modal = ModalState::InputFilePath {
+                                peer_url: peer.transfer_url(),
+                                peer_name: peer.name.clone(),
+                                input: String::new(),
+                            };
+                        }
+                    }
+                }
+                KeyCode::Char('d') | KeyCode::Char('D') => {
+                    app.modal = ModalState::InputDirectIp {
+                        input: String::new(),
+                    };
+                }
+                _ => {}
+            }
+        }
+    }
+}
+
+fn draw_ui(f: &mut Frame, app: &mut AppState) {
+    let size = f.area();
+
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(3), // Header
+            Constraint::Min(10),   // Body
+            Constraint::Length(3), // Footer / Shortcuts
+        ])
+        .split(size);
+
+    // 1. Header
+    let header_text = vec![
+        Span::styled("⚡ ZeroSend ", Style::default().fg(Color::Cyan).add_modifier(Modifier::BOLD)),
+        Span::raw("| Node: "),
+        Span::styled(&app.my_name, Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+        Span::raw(" | Interface: "),
+        Span::styled(
+            format!("{} ({})", app.iface.ip, app.iface.net_type.as_str()),
+            Style::default().fg(Color::Green).add_modifier(Modifier::BOLD),
+        ),
+        Span::raw(" | Port: "),
+        Span::styled("53318", Style::default().fg(Color::Magenta)),
+    ];
+    let header = Paragraph::new(Line::from(header_text))
+        .block(
+            Block::default()
+                .borders(Borders::ALL)
+                .border_type(BorderType::Rounded)
+                .border_style(Style::default().fg(Color::Cyan)),
+        )
+        .alignment(Alignment::Left);
+    f.render_widget(header, chunks[0]);
+
+    // 2. Body (Left: Peers, Right: Transfers & Logs)
+    let body_chunks = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([Constraint::Percentage(45), Constraint::Percentage(55)])
+        .split(chunks[1]);
+
+    // Left Panel: Discovered Peers
+    let items: Vec<ListItem> = app
+        .peers
+        .iter()
+        .map(|p| {
+            let status_icon = if p.is_online { "🟢" } else { "⚪" };
+            let lines = vec![
+                Line::from(vec![
+                    Span::raw(format!("{} ", status_icon)),
+                    Span::styled(&p.name, Style::default().fg(Color::White).add_modifier(Modifier::BOLD)),
+                    Span::styled(format!(" [{}]", p.net_type), Style::default().fg(Color::Blue)),
+                ]),
+                Line::from(vec![
+                    Span::raw("   IP: "),
+                    Span::styled(format!("{}:{}", p.ip, p.transfer_port), Style::default().fg(Color::Gray)),
+                    Span::raw(" | OS: "),
+                    Span::styled(&p.os, Style::default().fg(Color::DarkGray)),
+                ]),
+            ];
+            ListItem::new(lines)
+        })
+        .collect();
+
+    let peers_block = Block::default()
+        .title(" 📡 Discovered Peers (ZeroTier / VPN) ")
+        .borders(Borders::ALL)
+        .border_type(BorderType::Rounded)
+        .border_style(Style::default().fg(Color::Blue));
+
+    let peers_list = List::new(items)
+        .block(peers_block)
+        .highlight_style(
+            Style::default()
+                .bg(Color::Rgb(30, 58, 138))
+                .fg(Color::Yellow)
+                .add_modifier(Modifier::BOLD),
+        )
+        .highlight_symbol("▶ ");
+
+    f.render_stateful_widget(peers_list, body_chunks[0], &mut app.peer_list_state);
+
+    // Right Panel: Transfers (Top) & Logs (Bottom)
+    let right_chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([Constraint::Percentage(55), Constraint::Percentage(45)])
+        .split(body_chunks[1]);
+
+    // Transfers List
+    let transfer_block = Block::default()
+        .title(" 📦 Active & Recent Transfers ")
+        .borders(Borders::ALL)
+        .border_type(BorderType::Rounded)
+        .border_style(Style::default().fg(Color::Green));
+
+    if app.transfers.is_empty() {
+        let no_transfers = Paragraph::new("No active transfers. Press [S] to send a file.")
+            .style(Style::default().fg(Color::DarkGray))
+            .block(transfer_block)
+            .alignment(Alignment::Center);
+        f.render_widget(no_transfers, right_chunks[0]);
+    } else {
+        let transfer_items: Vec<ListItem> = app
+            .transfers
+            .iter()
+            .map(|t| {
+                let direction = if t.is_incoming { "📥 IN" } else { "📤 OUT" };
+                let speed = if t.speed_bps > 0 {
+                    format!(" ({}/s)", human_bytes(t.speed_bps as f64))
+                } else {
+                    String::new()
+                };
+
+                let state_str = match &t.state {
+                    TransferState::PendingConfirmation => "⏳ Waiting confirmation...".to_string(),
+                    TransferState::InProgress => format!("{:.1}%{}", t.percentage(), speed),
+                    TransferState::Completed => "✅ Completed".to_string(),
+                    TransferState::Failed(e) => format!("❌ Failed: {}", e),
+                    TransferState::Rejected => "⛔ Rejected".to_string(),
+                    TransferState::Canceled => "🛑 Canceled".to_string(),
+                };
+
+                let lines = vec![
+                    Line::from(vec![
+                        Span::styled(format!("[{}] ", direction), Style::default().fg(Color::Magenta)),
+                        Span::styled(&t.current_file_name, Style::default().fg(Color::White).add_modifier(Modifier::BOLD)),
+                        Span::raw(format!(" -> {}", t.peer_name)),
+                    ]),
+                    Line::from(vec![
+                        Span::raw("   "),
+                        Span::styled(
+                            format!("{}/{}", human_bytes(t.bytes_transferred as f64), human_bytes(t.total_bytes as f64)),
+                            Style::default().fg(Color::Cyan),
+                        ),
+                        Span::raw(" | "),
+                        Span::styled(state_str, Style::default().fg(Color::Yellow)),
+                    ]),
+                ];
+                ListItem::new(lines)
+            })
+            .collect();
+
+        let trans_list = List::new(transfer_items).block(transfer_block);
+        f.render_widget(trans_list, right_chunks[0]);
+    }
+
+    // Activity Logs
+    let logs_block = Block::default()
+        .title(" 📝 Activity Log ")
+        .borders(Borders::ALL)
+        .border_type(BorderType::Rounded)
+        .border_style(Style::default().fg(Color::Gray));
+
+    let log_lines: Vec<Line> = app
+        .logs
+        .iter()
+        .rev()
+        .take(10)
+        .rev()
+        .map(|l| Line::from(Span::styled(l, Style::default().fg(Color::White))))
+        .collect();
+
+    let logs_widget = Paragraph::new(log_lines)
+        .block(logs_block)
+        .wrap(Wrap { trim: true });
+    f.render_widget(logs_widget, right_chunks[1]);
+
+    // 3. Footer / Shortcuts
+    let shortcuts = Line::from(vec![
+        Span::styled("[S] ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+        Span::raw("Send File  "),
+        Span::styled("[D] ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+        Span::raw("Direct IP  "),
+        Span::styled("[↑/↓] ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+        Span::raw("Select Peer  "),
+        Span::styled("[Q] ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+        Span::raw("Quit"),
+    ]);
+    let footer = Paragraph::new(shortcuts)
+        .block(
+            Block::default()
+                .borders(Borders::ALL)
+                .border_type(BorderType::Rounded)
+                .border_style(Style::default().fg(Color::DarkGray)),
+        )
+        .alignment(Alignment::Center);
+    f.render_widget(footer, chunks[2]);
+
+    // Modals
+    match &app.modal {
+        ModalState::ConfirmTransfer(req) => {
+            let area = centered_rect(60, 30, size);
+            f.render_widget(Clear, area);
+
+            let block = Block::default()
+                .title(" 📥 Incoming File Transfer ")
+                .borders(Borders::ALL)
+                .border_type(BorderType::Double)
+                .border_style(Style::default().fg(Color::Yellow));
+
+            let files_summary = req
+                .files
+                .iter()
+                .map(|f| format!(" - {} ({})", f.name, human_bytes(f.size as f64)))
+                .collect::<Vec<_>>()
+                .join("\n");
+
+            let text = vec![
+                Line::from(vec![
+                    Span::styled(&req.sender_name, Style::default().fg(Color::Cyan).add_modifier(Modifier::BOLD)),
+                    Span::raw(format!(" wants to send you {} file(s) ({})", req.files.len(), human_bytes(req.total_size as f64))),
+                ]),
+                Line::from(""),
+                Line::from(files_summary),
+                Line::from(""),
+                Line::from(vec![
+                    Span::styled("[Y/A] Accept", Style::default().fg(Color::Green).add_modifier(Modifier::BOLD)),
+                    Span::raw("   |   "),
+                    Span::styled("[N/R] Reject", Style::default().fg(Color::Red).add_modifier(Modifier::BOLD)),
+                ]),
+            ];
+
+            let modal = Paragraph::new(text)
+                .block(block)
+                .alignment(Alignment::Center)
+                .wrap(Wrap { trim: true });
+            f.render_widget(modal, area);
+        }
+        ModalState::InputFilePath { peer_name, input, .. } => {
+            let area = centered_rect(65, 25, size);
+            f.render_widget(Clear, area);
+
+            let block = Block::default()
+                .title(format!(" 📤 Send File to {} ", peer_name))
+                .borders(Borders::ALL)
+                .border_type(BorderType::Rounded)
+                .border_style(Style::default().fg(Color::Cyan));
+
+            let text = vec![
+                Line::from("Enter absolute or relative path to file/folder:"),
+                Line::from(""),
+                Line::from(vec![
+                    Span::styled("> ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+                    Span::styled(input, Style::default().fg(Color::White).add_modifier(Modifier::BOLD)),
+                    Span::styled("█", Style::default().fg(Color::Cyan)),
+                ]),
+                Line::from(""),
+                Line::from(vec![
+                    Span::styled("[Enter] Send", Style::default().fg(Color::Green)),
+                    Span::raw("   "),
+                    Span::styled("[Esc] Cancel", Style::default().fg(Color::DarkGray)),
+                ]),
+            ];
+
+            let modal = Paragraph::new(text).block(block).wrap(Wrap { trim: true });
+            f.render_widget(modal, area);
+        }
+        ModalState::InputDirectIp { input } => {
+            let area = centered_rect(60, 25, size);
+            f.render_widget(Clear, area);
+
+            let block = Block::default()
+                .title(" 🔍 Connect Direct IP (Tailscale / Custom) ")
+                .borders(Borders::ALL)
+                .border_type(BorderType::Rounded)
+                .border_style(Style::default().fg(Color::Magenta));
+
+            let text = vec![
+                Line::from("Enter peer IP address (e.g. 10.147.20.55 or 100.80.x.x):"),
+                Line::from(""),
+                Line::from(vec![
+                    Span::styled("> ", Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
+                    Span::styled(input, Style::default().fg(Color::White).add_modifier(Modifier::BOLD)),
+                    Span::styled("█", Style::default().fg(Color::Magenta)),
+                ]),
+                Line::from(""),
+                Line::from(vec![
+                    Span::styled("[Enter] Connect", Style::default().fg(Color::Green)),
+                    Span::raw("   "),
+                    Span::styled("[Esc] Cancel", Style::default().fg(Color::DarkGray)),
+                ]),
+            ];
+
+            let modal = Paragraph::new(text).block(block).wrap(Wrap { trim: true });
+            f.render_widget(modal, area);
+        }
+        ModalState::None => {}
+    }
+}
+
+/// Helper function to create centered modal rectangle
+fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
+    let popup_layout = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Percentage((100 - percent_y) / 2),
+            Constraint::Percentage(percent_y),
+            Constraint::Percentage((100 - percent_y) / 2),
+        ])
+        .split(r);
+
+    Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([
+            Constraint::Percentage((100 - percent_x) / 2),
+            Constraint::Percentage(percent_x),
+            Constraint::Percentage((100 - percent_x) / 2),
+        ])
+        .split(popup_layout[1])[1]
+}
diff --git a/src/ui/vim_viewer.rs b/src/ui/vim_viewer.rs
new file mode 100644
index 0000000..1b04eb6
--- /dev/null
+++ b/src/ui/vim_viewer.rs
@@ -0,0 +1,390 @@
+use crate::ui::gui::ThemeColors;
+use eframe::egui::{
+    self, Color32, Frame, Key, Margin, RichText, Rounding, ScrollArea, Stroke, TextEdit, Vec2,
+};
+use std::time::Instant;
+
+pub struct VimViewerModal {
+    pub is_open: bool,
+    pub file_name: String,
+    pub relative_path: String,
+    pub source_peer: String,
+    pub lines: Vec<String>,
+    pub cursor_line: usize, // 1-indexed
+    pub search_query: String,
+    pub is_searching: bool,
+    pub command_input: String,
+    pub is_command_mode: bool,
+    pub status_msg: Option<String>,
+    last_g_press: Option<Instant>,
+}
+
+impl Default for VimViewerModal {
+    fn default() -> Self {
+        Self {
+            is_open: false,
+            file_name: String::new(),
+            relative_path: String::new(),
+            source_peer: String::new(),
+            lines: Vec::new(),
+            cursor_line: 1,
+            search_query: String::new(),
+            is_searching: false,
+            command_input: String::new(),
+            is_command_mode: false,
+            status_msg: None,
+            last_g_press: None,
+        }
+    }
+}
+
+impl VimViewerModal {
+    pub fn open(&mut self, file_name: String, relative_path: String, source_peer: String, content: String) {
+        self.is_open = true;
+        self.file_name = file_name;
+        self.relative_path = relative_path;
+        self.source_peer = source_peer;
+        self.lines = content.lines().map(|s| s.to_string()).collect();
+        if self.lines.is_empty() {
+            self.lines.push(String::new());
+        }
+        self.cursor_line = 1;
+        self.search_query.clear();
+        self.is_searching = false;
+        self.command_input.clear();
+        self.is_command_mode = false;
+        self.status_msg = Some(format!("Loaded {} lines", self.lines.len()));
+        self.last_g_press = None;
+    }
+
+    pub fn close(&mut self) {
+        self.is_open = false;
+        self.lines.clear();
+    }
+
+    pub fn handle_keys(&mut self, ctx: &egui::Context) {
+        if !self.is_open {
+            return;
+        }
+
+        let input = ctx.input(|i| i.clone());
+
+        // Escape always cancels search or command mode, or exits if already normal
+        if input.key_pressed(Key::Escape) {
+            if self.is_searching {
+                self.is_searching = false;
+            } else if self.is_command_mode {
+                self.is_command_mode = false;
+                self.command_input.clear();
+            } else {
+                self.close();
+            }
+            return;
+        }
+
+        if self.is_searching {
+            if input.key_pressed(Key::Enter) {
+                self.is_searching = false;
+                self.find_next_match(true);
+            }
+            return;
+        }
+
+        if self.is_command_mode {
+            if input.key_pressed(Key::Enter) {
+                let cmd = self.command_input.trim().to_string();
+                self.is_command_mode = false;
+                self.command_input.clear();
+                self.execute_command(&cmd);
+            }
+            return;
+        }
+
+        // NORMAL Mode Keybindings
+        let total = self.lines.len().max(1);
+
+        // j / Down (move down)
+        if input.key_pressed(Key::J) || input.key_pressed(Key::ArrowDown) {
+            self.cursor_line = (self.cursor_line + 1).min(total);
+        }
+
+        // k / Up (move up)
+        if input.key_pressed(Key::K) || input.key_pressed(Key::ArrowUp) {
+            self.cursor_line = self.cursor_line.saturating_sub(1).max(1);
+        }
+
+        // Ctrl+D / PageDown (half screen down)
+        if (input.modifiers.ctrl && input.key_pressed(Key::D)) || input.key_pressed(Key::PageDown) {
+            self.cursor_line = (self.cursor_line + 25).min(total);
+        }
+
+        // Ctrl+U / PageUp (half screen up)
+        if (input.modifiers.ctrl && input.key_pressed(Key::U)) || input.key_pressed(Key::PageUp) {
+            self.cursor_line = self.cursor_line.saturating_sub(25).max(1);
+        }
+
+        // gg (top of file)
+        if input.key_pressed(Key::G) && !input.modifiers.shift {
+            if let Some(prev) = self.last_g_press {
+                if prev.elapsed().as_millis() < 450 {
+                    self.cursor_line = 1;
+                    self.status_msg = Some("Top of file (gg)".to_string());
+                    self.last_g_press = None;
+                } else {
+                    self.last_g_press = Some(Instant::now());
+                }
+            } else {
+                self.last_g_press = Some(Instant::now());
+            }
+        }
+
+        // G (Shift+G) -> end of file
+        if input.modifiers.shift && input.key_pressed(Key::G) {
+            self.cursor_line = total;
+            self.status_msg = Some("Bottom of file (G)".to_string());
+        }
+
+        // / (search mode)
+        if input.key_pressed(Key::Slash) {
+            self.is_searching = true;
+            self.search_query.clear();
+        }
+
+        // : (command mode)
+        if input.modifiers.shift && input.key_pressed(Key::Colon) || input.key_pressed(Key::Colon) {
+            self.is_command_mode = true;
+            self.command_input.clear();
+        }
+    }
+
+    fn execute_command(&mut self, cmd: &str) {
+        if cmd == "q" || cmd == "q!" || cmd == "quit" {
+            self.close();
+        } else if let Ok(line_num) = cmd.parse::<usize>() {
+            let total = self.lines.len().max(1);
+            self.cursor_line = line_num.clamp(1, total);
+            self.status_msg = Some(format!("Jumped to line {}", self.cursor_line));
+        } else {
+            self.status_msg = Some(format!("Unknown command: :{}", cmd));
+        }
+    }
+
+    fn find_next_match(&mut self, forward: bool) {
+        if self.search_query.trim().is_empty() {
+            return;
+        }
+        let q = self.search_query.to_lowercase();
+        let total = self.lines.len();
+        if total == 0 {
+            return;
+        }
+
+        let start = if forward { self.cursor_line } else { self.cursor_line.saturating_sub(2) };
+
+        for offset in 0..total {
+            let idx = if forward {
+                (start + offset) % total
+            } else {
+                (start + total - offset) % total
+            };
+
+            if self.lines[idx].to_lowercase().contains(&q) {
+                self.cursor_line = idx + 1;
+                self.status_msg = Some(format!("Match found on line {}", self.cursor_line));
+                return;
+            }
+        }
+
+        self.status_msg = Some(format!("Pattern not found: '{}'", self.search_query));
+    }
+
+    pub fn render(&mut self, ctx: &egui::Context, _theme: ThemeColors) {
+        if !self.is_open {
+            return;
+        }
+
+        self.handle_keys(ctx);
+
+        let mut is_open = self.is_open;
+        let screen_rect = ctx.screen_rect();
+        let win_size = Vec2::new((screen_rect.width() * 0.92).min(1100.0), (screen_rect.height() * 0.88).min(750.0));
+
+        egui::Window::new(format!("⚡ Vim Viewer • {} ({})", self.file_name, self.source_peer))
+            .open(&mut is_open)
+            .collapsible(false)
+            .resizable(true)
+            .default_size(win_size)
+            .anchor(egui::Align2::CENTER_CENTER, Vec2::ZERO)
+            .frame(
+                Frame::window(&ctx.style())
+                    .fill(Color32::from_rgb(15, 18, 28))
+                    .stroke(Stroke::new(1.0_f32, Color32::from_rgb(51, 65, 85)))
+                    .rounding(Rounding::same(8.0))
+                    .inner_margin(Margin::same(0.0)),
+            )
+            .show(ctx, |ui| {
+                // 1. Top Header Bar
+                Frame::none()
+                    .fill(Color32::from_rgb(22, 27, 44))
+                    .inner_margin(Margin::symmetric(14.0, 10.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            ui.label(RichText::new("📄").size(15.0));
+                            ui.label(
+                                RichText::new(&self.relative_path)
+                                    .strong()
+                                    .color(Color32::from_rgb(248, 250, 252))
+                                    .size(13.0),
+                            );
+
+                            ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
+                                if ui.button(RichText::new("✕ Close (:q)").color(Color32::from_rgb(203, 213, 225))).clicked() {
+                                    self.is_open = false;
+                                }
+
+                                ui.label(
+                                    RichText::new(format!("{} lines", self.lines.len()))
+                                        .size(11.0)
+                                        .color(Color32::from_rgb(148, 163, 184)),
+                                );
+                            });
+                        });
+                    });
+
+                // 2. Code Area with Line Numbers Gutter
+                let gutter_width = 54.0;
+                let available_height = ui.available_height() - 32.0;
+
+                ScrollArea::vertical()
+                    .max_height(available_height)
+                    .auto_shrink([false, false])
+                    .show(ui, |ui| {
+                        ui.horizontal_top(|ui| {
+                            // Gutter column (Line numbers)
+                            ui.allocate_ui(Vec2::new(gutter_width, 0.0), |ui| {
+                                ui.vertical(|ui| {
+                                    for idx in 1..=self.lines.len() {
+                                        let is_current = idx == self.cursor_line;
+                                        let num_color = if is_current {
+                                            Color32::from_rgb(245, 158, 11) // Amber current line
+                                        } else {
+                                            Color32::from_rgb(71, 85, 105)
+                                        };
+
+                                        ui.label(
+                                            RichText::new(format!("{:>4}", idx))
+                                                .monospace()
+                                                .size(12.0)
+                                                .color(num_color),
+                                        );
+                                    }
+                                });
+                            });
+
+                            // Vertical divider line
+                            ui.add(egui::Separator::default().vertical());
+
+                            // Code column
+                            ui.vertical(|ui| {
+                                let query_lower = self.search_query.to_lowercase();
+                                let has_query = !query_lower.is_empty();
+
+                                for (idx, line) in self.lines.iter().enumerate() {
+                                    let line_num = idx + 1;
+                                    let is_current = line_num == self.cursor_line;
+
+                                    let line_display = if line.is_empty() { " " } else { line.as_str() };
+
+                                    let line_text = if is_current {
+                                        RichText::new(line_display)
+                                            .monospace()
+                                            .size(12.0)
+                                            .color(Color32::from_rgb(255, 255, 255))
+                                            .strong()
+                                            .background_color(Color32::from_rgb(30, 41, 59))
+                                    } else if has_query && line_display.to_lowercase().contains(&query_lower) {
+                                        RichText::new(line_display)
+                                            .monospace()
+                                            .size(12.0)
+                                            .color(Color32::from_rgb(254, 240, 138))
+                                            .background_color(Color32::from_rgb(113, 63, 18))
+                                    } else {
+                                        RichText::new(line_display)
+                                            .monospace()
+                                            .size(12.0)
+                                            .color(Color32::from_rgb(226, 232, 240))
+                                    };
+
+                                    ui.label(line_text);
+                                }
+                            });
+                        });
+                    });
+
+                // 3. Bottom Vim Status Bar
+                Frame::none()
+                    .fill(Color32::from_rgb(11, 15, 25))
+                    .stroke(Stroke::new(1.0_f32, Color32::from_rgb(30, 41, 59)))
+                    .inner_margin(Margin::symmetric(10.0, 5.0))
+                    .show(ui, |ui| {
+                        ui.horizontal(|ui| {
+                            // Mode Pill
+                            let (mode_text, mode_bg, mode_fg) = if self.is_searching {
+                                ("SEARCH", Color32::from_rgb(217, 119, 6), Color32::WHITE)
+                            } else if self.is_command_mode {
+                                ("COMMAND", Color32::from_rgb(147, 51, 234), Color32::WHITE)
+                            } else {
+                                ("NORMAL", Color32::from_rgb(37, 99, 235), Color32::WHITE)
+                            };
+
+                            Frame::none()
+                                .fill(mode_bg)
+                                .rounding(Rounding::same(3.0))
+                                .inner_margin(Margin::symmetric(6.0, 2.0))
+                                .show(ui, |ui| {
+                                    ui.label(RichText::new(mode_text).size(10.5).strong().color(mode_fg));
+                                });
+
+                            if self.is_searching {
+                                ui.label(RichText::new("/").monospace().color(Color32::from_rgb(245, 158, 11)));
+                                let edit = TextEdit::singleline(&mut self.search_query)
+                                    .hint_text("pattern (press Enter)...")
+                                    .font(egui::TextStyle::Monospace)
+                                    .desired_width(200.0);
+                                ui.add(edit).request_focus();
+                            } else if self.is_command_mode {
+                                ui.label(RichText::new(":").monospace().color(Color32::from_rgb(168, 85, 247)));
+                                let edit = TextEdit::singleline(&mut self.command_input)
+                                    .hint_text("q / line number...")
+                                    .font(egui::TextStyle::Monospace)
+                                    .desired_width(200.0);
+                                ui.add(edit).request_focus();
+                            } else {
+                                if let Some(msg) = &self.status_msg {
+                                    ui.label(RichText::new(msg).size(11.0).color(Color32::from_rgb(203, 213, 225)));
+                                }
+                            }
+
+                            ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
+                                ui.label(
+                                    RichText::new("j/k: nav • gg/G: top/bot • /: find • :q: exit")
+                                        .size(10.0)
+                                        .color(Color32::from_rgb(100, 116, 139)),
+                                );
+
+                                ui.separator();
+
+                                ui.label(
+                                    RichText::new(format!("Ln {}, Col 1", self.cursor_line))
+                                        .size(11.0)
+                                        .monospace()
+                                        .color(Color32::from_rgb(148, 163, 184)),
+                                );
+                            });
+                        });
+                    });
+            });
+
+        self.is_open = is_open;
+    }
+}
diff --git a/src/updater.rs b/src/updater.rs
new file mode 100644
index 0000000..740b855
--- /dev/null
+++ b/src/updater.rs
@@ -0,0 +1,359 @@
+use futures_util::StreamExt;
+use serde::{Deserialize, Serialize};
+use std::time::Duration;
+use tokio::sync::mpsc;
+use tracing::info;
+
+pub const GITEA_DEFAULT_REPO_URL: &str = "https://gitea.rardogsynapse.online/RarDog/ZeroSend";
+pub const GITEA_DEFAULT_API_BASE: &str = "https://gitea.rardogsynapse.online/api/v1/repos/RarDog/ZeroSend";
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct GiteaAsset {
+    pub name: String,
+    pub size: u64,
+    pub browser_download_url: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct GiteaRelease {
+    pub tag_name: String,
+    pub name: String,
+    #[serde(default)]
+    pub body: String,
+    #[serde(default)]
+    pub draft: bool,
+    #[serde(default)]
+    pub prerelease: bool,
+    #[serde(default)]
+    pub published_at: Option<String>,
+    #[serde(default)]
+    pub assets: Vec<GiteaAsset>,
+    #[serde(default)]
+    pub html_url: Option<String>,
+}
+
+#[derive(Debug, Clone)]
+#[allow(dead_code)]
+pub struct UpdateInfo {
+    pub current_version: String,
+    pub latest_version: String,
+    pub has_update: bool,
+    pub release_name: String,
+    pub release_notes: String,
+    pub download_url: Option<String>,
+    pub gitea_url: String,
+    pub asset_size: u64,
+}
+
+#[derive(Debug, Clone)]
+pub enum UpdateProgress {
+    Downloading { percent: f32, downloaded: u64, total: u64 },
+    Verifying,
+    Installing,
+    Completed,
+    Error(String),
+}
+
+/// Parse semantic version string (e.g. "v2.4.1", "2.4.2-beta") into (u32, u32, u32)
+pub fn parse_version(v: &str) -> (u32, u32, u32) {
+    let clean = v.trim().trim_start_matches('v').trim_start_matches('V');
+    let parts: Vec<&str> = clean.split('.').collect();
+    let major = parts.first().and_then(|s| s.split('-').next()).and_then(|s| s.parse::<u32>().ok()).unwrap_or(0);
+    let minor = parts.get(1).and_then(|s| s.split('-').next()).and_then(|s| s.parse::<u32>().ok()).unwrap_or(0);
+    let patch = parts.get(2).and_then(|s| s.split('-').next()).and_then(|s| s.parse::<u32>().ok()).unwrap_or(0);
+    (major, minor, patch)
+}
+
+/// Returns true if latest version is strictly newer than current version
+pub fn is_newer_version(latest: &str, current: &str) -> bool {
+    let (l_maj, l_min, l_pat) = parse_version(latest);
+    let (c_maj, c_min, c_pat) = parse_version(current);
+    (l_maj, l_min, l_pat) > (c_maj, c_min, c_pat)
+}
+
+/// Check Gitea repository for available releases or newer version tags
+pub async fn check_gitea_update(api_base: Option<&str>) -> Result<UpdateInfo, String> {
+    let base = api_base.unwrap_or(GITEA_DEFAULT_API_BASE).trim_end_matches('/');
+    let current_version = env!("CARGO_PKG_VERSION").to_string();
+
+    let client = reqwest::Client::builder()
+        .timeout(Duration::from_secs(6))
+        .danger_accept_invalid_certs(true) // Helpful for self-hosted Gitea instances with internal certs
+        .user_agent(format!("ZeroSend-Updater/{}", current_version))
+        .build()
+        .map_err(|e| format!("Failed to build HTTP client: {}", e))?;
+
+    // 1. Try releases/latest API
+    let latest_release_url = format!("{}/releases/latest", base);
+    if let Ok(resp) = client.get(&latest_release_url).send().await {
+        if resp.status().is_success() {
+            if let Ok(release) = resp.json::<GiteaRelease>().await {
+                let latest_ver = release.tag_name.trim().trim_start_matches('v').to_string();
+                let has_update = is_newer_version(&latest_ver, &current_version);
+
+                // Look for Windows executable asset (e.g. zerosend.exe, zerosend-vX.X.exe)
+                let mut download_url = None;
+                let mut asset_size = 0;
+
+                for asset in &release.assets {
+                    let name_lower = asset.name.to_lowercase();
+                    if name_lower.ends_with(".exe") || name_lower.ends_with(".zip") {
+                        download_url = Some(asset.browser_download_url.clone());
+                        asset_size = asset.size;
+                        break;
+                    }
+                }
+
+                let gitea_url = release.html_url.unwrap_or_else(|| {
+                    format!("{}/releases/tag/{}", GITEA_DEFAULT_REPO_URL, release.tag_name)
+                });
+
+                return Ok(UpdateInfo {
+                    current_version,
+                    latest_version: latest_ver,
+                    has_update,
+                    release_name: release.name,
+                    release_notes: release.body,
+                    download_url,
+                    gitea_url,
+                    asset_size,
+                });
+            }
+        }
+    }
+
+    // 2. Try releases list API (/releases)
+    let releases_url = format!("{}/releases", base);
+    if let Ok(resp) = client.get(&releases_url).send().await {
+        if resp.status().is_success() {
+            if let Ok(releases) = resp.json::<Vec<GiteaRelease>>().await {
+                if let Some(release) = releases.into_iter().find(|r| !r.draft) {
+                    let latest_ver = release.tag_name.trim().trim_start_matches('v').to_string();
+                    let has_update = is_newer_version(&latest_ver, &current_version);
+
+                    let mut download_url = None;
+                    let mut asset_size = 0;
+
+                    for asset in &release.assets {
+                        let name_lower = asset.name.to_lowercase();
+                        if name_lower.ends_with(".exe") || name_lower.ends_with(".zip") {
+                            download_url = Some(asset.browser_download_url.clone());
+                            asset_size = asset.size;
+                            break;
+                        }
+                    }
+
+                    let gitea_url = release.html_url.unwrap_or_else(|| {
+                        format!("{}/releases/tag/{}", GITEA_DEFAULT_REPO_URL, release.tag_name)
+                    });
+
+                    return Ok(UpdateInfo {
+                        current_version,
+                        latest_version: latest_ver,
+                        has_update,
+                        release_name: release.name,
+                        release_notes: release.body,
+                        download_url,
+                        gitea_url,
+                        asset_size,
+                    });
+                }
+            }
+        }
+    }
+
+    // 3. Fallback: Check raw Cargo.toml in master branch
+    let raw_cargo_url = format!("{}/raw/branch/master/Cargo.toml", base);
+    if let Ok(resp) = client.get(&raw_cargo_url).send().await {
+        if resp.status().is_success() {
+            if let Ok(content) = resp.text().await {
+                for line in content.lines() {
+                    let line = line.trim();
+                    if line.starts_with("version") {
+                        if let Some(ver_val) = line.split('=').nth(1) {
+                            let parsed = ver_val.trim().trim_matches('"').trim_matches('\'');
+                            let has_update = is_newer_version(parsed, &current_version);
+                            return Ok(UpdateInfo {
+                                current_version,
+                                latest_version: parsed.to_string(),
+                                has_update,
+                                release_name: format!("ZeroSend v{}", parsed),
+                                release_notes: "Latest master branch update available on Gitea.".to_string(),
+                                download_url: None,
+                                gitea_url: GITEA_DEFAULT_REPO_URL.to_string(),
+                                asset_size: 0,
+                            });
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    Err("Could not reach Gitea server or no releases found.".to_string())
+}
+
+/// Download and apply update on Windows with live progress reporting
+pub async fn perform_update_download(
+    download_url: String,
+    progress_tx: mpsc::UnboundedSender<UpdateProgress>,
+) {
+    let client = match reqwest::Client::builder()
+        .timeout(Duration::from_secs(120))
+        .danger_accept_invalid_certs(true)
+        .user_agent("ZeroSend-AutoUpdater")
+        .build()
+    {
+        Ok(c) => c,
+        Err(e) => {
+            let _ = progress_tx.send(UpdateProgress::Error(format!("Client error: {}", e)));
+            return;
+        }
+    };
+
+    let response = match client.get(&download_url).send().await {
+        Ok(r) => {
+            if !r.status().is_success() {
+                let _ = progress_tx.send(UpdateProgress::Error(format!(
+                    "Download failed with HTTP status {}",
+                    r.status()
+                )));
+                return;
+            }
+            r
+        }
+        Err(e) => {
+            let _ = progress_tx.send(UpdateProgress::Error(format!("Connection error: {}", e)));
+            return;
+        }
+    };
+
+    let total_size = response.content_length().unwrap_or(0);
+    let current_exe = match std::env::current_exe() {
+        Ok(p) => p,
+        Err(e) => {
+            let _ = progress_tx.send(UpdateProgress::Error(format!("Cannot locate exe: {}", e)));
+            return;
+        }
+    };
+
+    let exe_dir = current_exe.parent().unwrap_or_else(|| std::path::Path::new("."));
+    let temp_download_path = exe_dir.join("zerosend_update.exe");
+
+    // Download stream to temporary file
+    let mut file = match tokio::fs::File::create(&temp_download_path).await {
+        Ok(f) => f,
+        Err(e) => {
+            let _ = progress_tx.send(UpdateProgress::Error(format!(
+                "Failed to create update file {:?}: {}",
+                temp_download_path, e
+            )));
+            return;
+        }
+    };
+
+    let mut stream = response.bytes_stream();
+    let mut downloaded: u64 = 0;
+
+    use tokio::io::AsyncWriteExt;
+    while let Some(chunk_res) = stream.next().await {
+        match chunk_res {
+            Ok(chunk) => {
+                if let Err(e) = file.write_all(&chunk).await {
+                    let _ = progress_tx.send(UpdateProgress::Error(format!("Disk write error: {}", e)));
+                    let _ = tokio::fs::remove_file(&temp_download_path).await;
+                    return;
+                }
+                downloaded += chunk.len() as u64;
+                let percent = if total_size > 0 {
+                    (downloaded as f32 / total_size as f32).min(1.0)
+                } else {
+                    0.0
+                };
+                let _ = progress_tx.send(UpdateProgress::Downloading {
+                    percent,
+                    downloaded,
+                    total: total_size,
+                });
+            }
+            Err(e) => {
+                let _ = progress_tx.send(UpdateProgress::Error(format!("Stream download error: {}", e)));
+                let _ = tokio::fs::remove_file(&temp_download_path).await;
+                return;
+            }
+        }
+    }
+
+    if let Err(e) = file.flush().await {
+        let _ = progress_tx.send(UpdateProgress::Error(format!("File flush error: {}", e)));
+        return;
+    }
+    drop(file);
+
+    // Verify downloaded executable
+    let _ = progress_tx.send(UpdateProgress::Verifying);
+    match tokio::fs::read(&temp_download_path).await {
+        Ok(bytes) => {
+            if bytes.len() < 100_000 {
+                let _ = progress_tx.send(UpdateProgress::Error(
+                    "Downloaded file is too small to be a valid executable".to_string(),
+                ));
+                let _ = tokio::fs::remove_file(&temp_download_path).await;
+                return;
+            }
+            // Check PE MZ magic header on Windows
+            if bytes.len() >= 2 && (bytes[0] != b'M' || bytes[1] != b'Z') {
+                let _ = progress_tx.send(UpdateProgress::Error(
+                    "Downloaded binary does not appear to be a valid Windows executable".to_string(),
+                ));
+                let _ = tokio::fs::remove_file(&temp_download_path).await;
+                return;
+            }
+        }
+        Err(e) => {
+            let _ = progress_tx.send(UpdateProgress::Error(format!("Verification read error: {}", e)));
+            return;
+        }
+    }
+
+    // Installing & Self-Replacing
+    let _ = progress_tx.send(UpdateProgress::Installing);
+
+    // On Windows, rename current exe to .old, and move new exe into place
+    let old_backup_path = exe_dir.join("zerosend.exe.old");
+    let _ = std::fs::remove_file(&old_backup_path); // Remove prior old backup if any
+
+    let rename_result = std::fs::rename(&current_exe, &old_backup_path);
+    if rename_result.is_ok() {
+        if let Err(e) = std::fs::rename(&temp_download_path, &current_exe) {
+            // Restore old backup if move failed
+            let _ = std::fs::rename(&old_backup_path, &current_exe);
+            let _ = progress_tx.send(UpdateProgress::Error(format!("Failed to install update: {}", e)));
+            return;
+        }
+
+        info!("Update successfully installed to {:?}", current_exe);
+        let _ = progress_tx.send(UpdateProgress::Completed);
+
+        // Spawn updated application and exit
+        let _ = std::process::Command::new(&current_exe).spawn();
+        std::thread::sleep(Duration::from_millis(500));
+        std::process::exit(0);
+    } else {
+        // Fallback: Use PowerShell deferred replacement
+        info!("Direct rename locked; triggering background PowerShell replacement...");
+        let script = format!(
+            "Start-Sleep -Milliseconds 600; Move-Item -Force '{temp}' '{target}'; Start-Process '{target}'",
+            temp = temp_download_path.to_string_lossy(),
+            target = current_exe.to_string_lossy()
+        );
+
+        let _ = std::process::Command::new("powershell")
+            .args(["-NoProfile", "-WindowStyle", "Hidden", "-Command", &script])
+            .spawn();
+
+        let _ = progress_tx.send(UpdateProgress::Completed);
+        std::thread::sleep(Duration::from_millis(500));
+        std::process::exit(0);
+    }
+}