fix: eliminate video player blue screen on desktop with software rendering default and decoder toggle (v3.6.4)

android/app/src/main/AndroidManifest.xml

@@ -5,7 +5,8 @@
     <application
         android:label="Prisma"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:largeHeap="true">
         <activity
             android:name=".MainActivity"
             android:exported="true"

installer/build_linux_appimage.sh

@@ -0,0 +1,92 @@
+#!/usr/bin/env bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+cd "${ROOT_DIR}"
+
+VERSION=$(grep 'version:' pubspec.yaml | head -n 1 | awk '{print $2}' | cut -d'+' -f1)
+if [ -z "$VERSION" ]; then
+  VERSION="3.5.5"
+fi
+
+echo "Building AppImage for Prisma v${VERSION}..."
+
+BUNDLE_DIR="${ROOT_DIR}/build/linux/x64/release/bundle"
+if [ ! -f "${BUNDLE_DIR}/gel_rule_app" ]; then
+  echo "Release bundle not found. Running 'flutter build linux --release'..."
+  flutter build linux --release
+fi
+
+APP_DIR="${ROOT_DIR}/build/AppDir"
+OUTPUT_DIR="${ROOT_DIR}/build"
+APPIMAGE_NAME="Prisma-v${VERSION}-linux-x86_64.AppImage"
+OUTPUT_APPIMAGE="${OUTPUT_DIR}/${APPIMAGE_NAME}"
+
+# Ensure appimagetool is available
+APPIMAGETOOL=""
+if command -v appimagetool >/dev/null 2>&1; then
+  APPIMAGETOOL="appimagetool"
+elif [ -f "${ROOT_DIR}/build/tools/appimagetool" ]; then
+  APPIMAGETOOL="${ROOT_DIR}/build/tools/appimagetool"
+else
+  echo "Downloading appimagetool..."
+  mkdir -p "${ROOT_DIR}/build/tools"
+  curl -fsSL https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-x86_64.AppImage -o "${ROOT_DIR}/build/tools/appimagetool"
+  chmod +x "${ROOT_DIR}/build/tools/appimagetool"
+  APPIMAGETOOL="${ROOT_DIR}/build/tools/appimagetool"
+fi
+
+echo "Preparing AppDir at ${APP_DIR}..."
+rm -rf "${APP_DIR}"
+mkdir -p "${APP_DIR}"
+
+# Copy bundle contents
+cp -r "${BUNDLE_DIR}"/* "${APP_DIR}/"
+
+# AppRun script
+cat << 'EOF' > "${APP_DIR}/AppRun"
+#!/bin/sh
+HERE="$(dirname "$(readlink -f "${0}")")"
+export PATH="${HERE}/usr/bin:${PATH}"
+export LD_LIBRARY_PATH="${HERE}/lib:${HERE}/usr/lib:${LD_LIBRARY_PATH}"
+exec "${HERE}/gel_rule_app" "$@"
+EOF
+chmod +x "${APP_DIR}/AppRun"
+
+# Desktop file
+cat << 'EOF' > "${APP_DIR}/prisma.desktop"
+[Desktop Entry]
+Name=Prisma
+GenericName=Booru Client
+Comment=Prisma - Modern Booru & Art Client
+Exec=gel_rule_app %u
+Icon=prisma
+Terminal=false
+Type=Application
+Categories=Network;Graphics;
+StartupWMClass=com.example.gel_rule_app
+EOF
+
+mkdir -p "${APP_DIR}/usr/share/applications"
+cp "${APP_DIR}/prisma.desktop" "${APP_DIR}/usr/share/applications/prisma.desktop"
+
+# Icons
+ICON_SRC="${ROOT_DIR}/macos/Runner/Assets.xcassets/AppIcon.appiconset"
+if [ -d "${ICON_SRC}" ]; then
+  for size in 16 32 64 128 256 512 1024; do
+    if [ -f "${ICON_SRC}/app_icon_${size}.png" ]; then
+      mkdir -p "${APP_DIR}/usr/share/icons/hicolor/${size}x${size}/apps"
+      cp "${ICON_SRC}/app_icon_${size}.png" "${APP_DIR}/usr/share/icons/hicolor/${size}x${size}/apps/prisma.png"
+    fi
+  done
+  cp "${ICON_SRC}/app_icon_512.png" "${APP_DIR}/prisma.png"
+fi
+
+# Build AppImage
+echo "Generating AppImage with ${APPIMAGETOOL}..."
+ARCH=x86_64 "${APPIMAGETOOL}" -n "${APP_DIR}" "${OUTPUT_APPIMAGE}"
+
+echo "AppImage created successfully: ${OUTPUT_APPIMAGE}"
+ls -lh "${OUTPUT_APPIMAGE}"

lib/app/changelog.dart

@@ -1,4 +1,54 @@
 const prismaChangelog = [
+  PrismaChange(
+    version: '3.6.4',
+    title: 'Полное исправление воспроизведения видео на ПК (устранение синего экрана)',
+    bullets: [
+      'Программный рендеринг (S/W) по умолчанию для ПК: на десктопных платформах отключен проблемный OpenGL FBO мост аппаратного ускорения, вызывавший синий экран из-за отсутствия или конфликтов драйверов VAAPI/VDPAU в Linux/AppImage.',
+      'Переключатель декодера H/W / S/W в плеере: на верхней панели управления видеоплеером добавлена кнопка быстрого переключения между аппаратным (H/W) и программным (S/W) декодированием на лету.',
+      'Отображение постера-превью: под видеоплеером теперь отображается превью-постер на время буферизации, исключая появление пустых областей.',
+      'Безопасное превью в ленте: предпросмотр видео в карточках постов на ПК также переведен на надежный программный рендерер.',
+    ],
+  ),
+  PrismaChange(
+    version: '3.6.3',
+    title: 'Горизонтальный скролл колесиком мыши на ПК и исправление синего экрана в видеоплеере',
+    bullets: [
+      'Горизонтальная прокрутка колесиком мыши в настройках: верхняя панель категорий настроек теперь плавно прокручивается колесиком мыши строго при наведении курсора.',
+      'Горизонтальная прокрутка колесиком мыши в авторах: полоса любимых авторов и лента их медиа теперь поддерживают быструю прокрутку колесиком мыши при наведении курсора.',
+      'Устранение «синего экрана» в видеоплеере на ПК: исправлена нативная инициализация MediaKit перед запуском Flutter-движка и настроен оптимальный режим аппаратного ускорения для десктопных платформ.',
+    ],
+  ),
+  PrismaChange(
+    version: '3.6.2',
+    title: 'Комплексная оптимизация памяти на телефоне и ПК, полное отключение зума колесиком',
+    bullets: [
+      'Полное отключение масштабирования колесиком мыши: перехвачен внутренний обработчик PointerScrollEvent в интерактивном вьюере, что навсегда исключило нежелательный зум при прокрутке.',
+      'Предотвращение вылетов на смартфонах (OOM): включен флаг android:largeHeap="true", расширяющий доступный лимит оперативной памяти процесса до 512–1024 МБ.',
+      'Ограничение аппетита кэша изображений: глобальный ImageCache в Flutter ограничен безопасным лимитом в 180 МБ и 120 изображений (вместо неограниченного роста до 1 ГБ+), неактивные растры своевременно выгружаются сборщиком мусора.',
+      'Оптимизация декодирования тяжелых артов: полноразмерные изображения с экстремальным разрешением (до 10K+) теперь безопасно декодируются с ограничением memCacheWidth под экран устройства, снижая расход RAM на 80–90%.',
+      'Оптимизация сетки и миниатюр: карточки ленты изолированы в RepaintBoundary для гладкого 120 FPS скролла без паразитных перерисовок, а всем каруселям, аватаркам и мозаикам заданы строгие границы кэширования.',
+    ],
+  ),
+  PrismaChange(
+    version: '3.6.1',
+    title: 'Плавная боковая панель без лагов и отключение зума колесиком',
+    bullets: [
+      'Устранение лагов боковой панели: полностью переработана анимация наведения на боковую панель на ПК. Убран тяжелый шейдерный блюр при изменении ширины и зафиксирована верстка элементов — текст больше не сжимается, не дергается и раскрывается на 120 FPS максимально плавно.',
+      'Отключение зума фото по колесику мыши: исключено случайное и резкое масштабирование изображений при прокрутке колесиком мыши. Масштабирование фото доступно через горячие клавиши (+, -, 0, F) или двойной клик.',
+    ],
+  ),
+  PrismaChange(
+    version: '3.6.0',
+    title: 'Редизайн интерфейса для ПК и система горячих клавиш (хоткеи)',
+    bullets: [
+      'Горячие клавиши для всех вкладок: переключение разделов по Ctrl+1..8 (и Alt+1..8), циклический переход Ctrl+Tab / Ctrl+Shift+Tab, поиск Ctrl+F, обновление Ctrl+R / F5.',
+      'Хоткеи видеоплеера: пауза/воспроизведение (Space, K), плавная перемотка на 5с (←/→, J/L) и 15с (Shift+←/→) с визуальными индикаторами, регулировка громкости ↑/↓, выключение звука M, полный экран F.',
+      'Хоткеи просмотра фото и галереи: масштабирование клавишами + / - / 0 (сброс в 100%), переключение страниц и фото в постах стрелками ← / →, быстрое сохранение Ctrl+S.',
+      'Окно-шпаргалка горячих клавиш: интерактивное модальное окно со всеми клавиатурными комбинациями по нажатию ? или F1, а также из меню панели.',
+      'Редизайн боковой панели ПК: боковое меню в стиле Liquid Glass с эффектом матового стекла, логотипом Lunaris, бейджами хоткеев, закреплением панели и быстрыми действиями.',
+      'Редизайн вкладок ленты: стильный сегментированный бар выбора периодов (Все время, 24ч, Неделя, Месяц, Год) с анимированными иконками и неоновые чипы источников.',
+    ],
+  ),
   PrismaChange(
     version: '3.5.5',
     title: 'Сохранение последней вкладки и состояния навигации между разделами',

lib/features/artists/presentation/artists_screen.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:ui';
 import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
@@ -1328,7 +1329,7 @@ class _FavoriteArtistsModalState extends State<_FavoriteArtistsModal> {
   }
 }
 
-class _FavoriteArtistsSection extends ConsumerWidget {
+class _FavoriteArtistsSection extends StatefulWidget {
   const _FavoriteArtistsSection({
     required this.favorites,
     required this.selectedKey,
@@ -1344,8 +1345,23 @@ class _FavoriteArtistsSection extends ConsumerWidget {
   final ValueChanged<FavoriteArtistItem> onRemoveFavorite;
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  State<_FavoriteArtistsSection> createState() =>
-    if (favorites.isEmpty) {
+      _FavoriteArtistsSectionState();
+}
+
+class _FavoriteArtistsSectionState extends State<_FavoriteArtistsSection> {
+  final ScrollController _scrollController = ScrollController();
+  bool _isHovered = false;
+
+  @override
+  void dispose() {
+    _scrollController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (widget.favorites.isEmpty) {
       return Padding(
         padding: const EdgeInsets.fromLTRB(16, 4, 16, 8),
         child: _ArtistsLiquidCard(
@@ -1368,9 +1384,9 @@ class _FavoriteArtistsSection extends ConsumerWidget {
       );
     }
 
-    final selected = favorites.firstWhere(
+    final selected = widget.favorites.firstWhere(
-      (f) => f.key == selectedKey,
+      (f) => f.key == widget.selectedKey,
-      orElse: () => favorites.first,
+      orElse: () => widget.favorites.first,
     );
 
     return Padding(
@@ -1385,14 +1401,14 @@ class _FavoriteArtistsSection extends ConsumerWidget {
                 const Icon(Icons.star_rounded, color: Colors.amber, size: 20),
                 const SizedBox(width: 6),
                 Text(
-                  'Любимые авторы (${favorites.length})',
+                  'Любимые авторы (${widget.favorites.length})',
                   style: Theme.of(context).textTheme.titleSmall?.copyWith(
                         fontWeight: FontWeight.bold,
                       ),
                 ),
                 const Spacer(),
                 TextButton(
-                  onPressed: () => onOpenArtist(selected),
+                  onPressed: () => widget.onOpenArtist(selected),
                   style: TextButton.styleFrom(
                     visualDensity: VisualDensity.compact,
                     padding: const EdgeInsets.symmetric(horizontal: 8),
@@ -1409,111 +1425,136 @@ class _FavoriteArtistsSection extends ConsumerWidget {
               ],
             ),
             const SizedBox(height: 8),
-            SizedBox(
+            MouseRegion(
-              height: 88,
+              onEnter: (_) => _isHovered = true,
-              child: ListView.separated(
+              onExit: (_) => _isHovered = false,
-                padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 4),
+              child: Listener(
-                scrollDirection: Axis.horizontal,
+                onPointerSignal: (event) {
-                itemCount: favorites.length,
+                  if (!_isHovered ||
-                separatorBuilder: (_, __) => const SizedBox(width: 10),
+                      event is! PointerScrollEvent ||
-                itemBuilder: (context, index) {
+                      !_scrollController.hasClients) {
-                  final fav = favorites[index];
+                    return;
-                  final isSelected = fav.key == selected.key;
+                  }
-                  final sColor = _serviceColor(fav.service);
+                  final delta = event.scrollDelta.dy != 0
-
+                      ? event.scrollDelta.dy
-                  return InkWell(
+                      : event.scrollDelta.dx;
-                    borderRadius: BorderRadius.circular(16),
+                  if (delta == 0) return;
-                    onTap: () => onSelect(fav),
+                  final target = (_scrollController.offset + delta * 1.5).clamp(
-                    child: AnimatedContainer(
+                    0.0,
-                      duration: const Duration(milliseconds: 200),
+                    _scrollController.position.maxScrollExtent,
-                      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
-                      decoration: BoxDecoration(
-                        color: isSelected
-                            ? Theme.of(context)
-                                .colorScheme
-                                .primaryContainer
-                                .withValues(alpha: 0.45)
-                            : Colors.transparent,
-                        borderRadius: BorderRadius.circular(16),
-                        border: Border.all(
-                          color: isSelected
-                              ? Theme.of(context).colorScheme.primary
-                              : Colors.transparent,
-                          width: 1.5,
-                        ),
-                        boxShadow: isSelected
-                            ? [
-                                BoxShadow(
-                                  color: Theme.of(context)
-                                      .colorScheme
-                                      .primary
-                                      .withValues(alpha: 0.25),
-                                  blurRadius: 8,
-                                ),
-                              ]
-                            : null,
-                      ),
-                      child: Column(
-                        mainAxisAlignment: MainAxisAlignment.center,
-                        children: [
-                          Container(
-                            width: 44,
-                            height: 44,
-                            decoration: BoxDecoration(
-                              borderRadius: BorderRadius.circular(14),
-                              border: Border.all(
-                                color: isSelected
-                                    ? Theme.of(context).colorScheme.primary
-                                    : sColor.withValues(alpha: 0.4),
-                                width: 1.2,
-                              ),
-                            ),
-                            child: ClipRRect(
-                              borderRadius: BorderRadius.circular(13),
-                              child: fav.avatarUrl != null &&
-                                      fav.avatarUrl!.isNotEmpty
-                                  ? CachedNetworkImage(
-                                      imageUrl: fav.avatarUrl!,
-                                      fit: BoxFit.cover,
-                                      placeholder: (_, __) => const Icon(
-                                          Icons.person_rounded,
-                                          size: 20),
-                                      errorWidget: (_, __, ___) => const Icon(
-                                          Icons.person_rounded,
-                                          size: 20),
-                                    )
-                                  : Center(
-                                      child: Text(
-                                        fav.name.isNotEmpty
-                                            ? fav.name[0].toUpperCase()
-                                            : '?',
-                                        style: const TextStyle(
-                                            fontWeight: FontWeight.bold),
-                                      ),
-                                    ),
-                            ),
-                          ),
-                          const SizedBox(height: 4),
-                          SizedBox(
-                            width: 68,
-                            child: Text(
-                              fav.name,
-                              maxLines: 1,
-                              overflow: TextOverflow.ellipsis,
-                              textAlign: TextAlign.center,
-                              style: TextStyle(
-                                fontSize: 11,
-                                fontWeight: isSelected
-                                    ? FontWeight.bold
-                                    : FontWeight.normal,
-                              ),
-                            ),
-                          ),
-                        ],
-                      ),
-                    ),
                   );
+                  _scrollController.jumpTo(target);
                 },
+                child: SizedBox(
+                  height: 88,
+                  child: ListView.separated(
+                    controller: _scrollController,
+                    padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 4),
+                    scrollDirection: Axis.horizontal,
+                    itemCount: widget.favorites.length,
+                    separatorBuilder: (_, __) => const SizedBox(width: 10),
+                    itemBuilder: (context, index) {
+                      final fav = widget.favorites[index];
+                      final isSelected = fav.key == selected.key;
+                      final sColor = _serviceColor(fav.service);
+
+                      return InkWell(
+                        borderRadius: BorderRadius.circular(16),
+                        onTap: () => widget.onSelect(fav),
+                        child: AnimatedContainer(
+                          duration: const Duration(milliseconds: 200),
+                          padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
+                          decoration: BoxDecoration(
+                            color: isSelected
+                                ? Theme.of(context)
+                                    .colorScheme
+                                    .primaryContainer
+                                    .withValues(alpha: 0.45)
+                                : Colors.transparent,
+                            borderRadius: BorderRadius.circular(16),
+                            border: Border.all(
+                              color: isSelected
+                                  ? Theme.of(context).colorScheme.primary
+                                  : Colors.transparent,
+                              width: 1.5,
+                            ),
+                            boxShadow: isSelected
+                                ? [
+                                    BoxShadow(
+                                      color: Theme.of(context)
+                                          .colorScheme
+                                          .primary
+                                          .withValues(alpha: 0.25),
+                                      blurRadius: 8,
+                                    ),
+                                  ]
+                                : null,
+                          ),
+                          child: Column(
+                            mainAxisAlignment: MainAxisAlignment.center,
+                            children: [
+                              Container(
+                                width: 44,
+                                height: 44,
+                                decoration: BoxDecoration(
+                                  borderRadius: BorderRadius.circular(14),
+                                  border: Border.all(
+                                    color: isSelected
+                                        ? Theme.of(context).colorScheme.primary
+                                        : sColor.withValues(alpha: 0.4),
+                                    width: 1.2,
+                                  ),
+                                ),
+                                child: ClipRRect(
+                                  borderRadius: BorderRadius.circular(13),
+                                  child: fav.avatarUrl != null &&
+                                          fav.avatarUrl!.isNotEmpty
+                                      ? CachedNetworkImage(
+                                          imageUrl: fav.avatarUrl!,
+                                          memCacheWidth: 120,
+                                          memCacheHeight: 120,
+                                          fit: BoxFit.cover,
+                                          placeholder: (_, __) => const Icon(
+                                              Icons.person_rounded,
+                                              size: 20),
+                                          errorWidget: (_, __, ___) => const Icon(
+                                              Icons.person_rounded,
+                                              size: 20),
+                                        )
+                                      : Center(
+                                          child: Text(
+                                            fav.name.isNotEmpty
+                                                ? fav.name[0].toUpperCase()
+                                                : '?',
+                                            style: const TextStyle(
+                                                fontWeight: FontWeight.bold),
+                                          ),
+                                        ),
+                                ),
+                              ),
+                              const SizedBox(height: 4),
+                              SizedBox(
+                                width: 68,
+                                child: Text(
+                                  fav.name,
+                                  maxLines: 1,
+                                  overflow: TextOverflow.ellipsis,
+                                  textAlign: TextAlign.center,
+                                  style: TextStyle(
+                                    fontSize: 11,
+                                    fontWeight: isSelected
+                                        ? FontWeight.bold
+                                        : FontWeight.normal,
+                                  ),
+                                ),
+                              ),
+                            ],
+                          ),
+                        ),
+                      );
+                    },
+                  ),
+                ),
               ),
             ),
             const SizedBox(height: 6),
@@ -1525,18 +1566,34 @@ class _FavoriteArtistsSection extends ConsumerWidget {
   }
 }
 
-class _FavoriteArtistMediaStrip extends ConsumerWidget {
+class _FavoriteArtistMediaStrip extends ConsumerStatefulWidget {
   const _FavoriteArtistMediaStrip({required this.artist});
 
   final FavoriteArtistItem artist;
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  ConsumerState<_FavoriteArtistMediaStrip> createState() =>
+      _FavoriteArtistMediaStripState();
+}
+
+class _FavoriteArtistMediaStripState
+    extends ConsumerState<_FavoriteArtistMediaStrip> {
+  final ScrollController _scrollController = ScrollController();
+  bool _isHovered = false;
+
+  @override
+  void dispose() {
+    _scrollController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
     final query = ArtistWorkQuery(
-      providerId: artist.providerId,
+      providerId: widget.artist.providerId,
-      service: artist.service,
+      service: widget.artist.service,
-      artistId: artist.id,
+      artistId: widget.artist.id,
-      artistName: artist.name,
+      artistName: widget.artist.name,
     );
     final asyncPosts = ref.watch(artistPostsProvider(query));
 
@@ -1564,76 +1621,101 @@ class _FavoriteArtistMediaStrip extends ConsumerWidget {
               ),
             );
           }
-          return SizedBox(
+          return MouseRegion(
-            height: 96,
+            onEnter: (_) => _isHovered = true,
-            child: ListView.separated(
+            onExit: (_) => _isHovered = false,
-              scrollDirection: Axis.horizontal,
+            child: Listener(
-              itemCount: posts.length.clamp(0, 15),
+              onPointerSignal: (event) {
-              separatorBuilder: (_, __) => const SizedBox(width: 8),
+                if (!_isHovered ||
-              itemBuilder: (context, index) {
+                    event is! PointerScrollEvent ||
-                final post = posts[index];
+                    !_scrollController.hasClients) {
-                final isVideo = MediaUrlSelector.isVideo(post);
+                  return;
-                return InkWell(
+                }
-                  borderRadius: BorderRadius.circular(14),
+                final delta = event.scrollDelta.dy != 0
-                  onTap: () => AppNavigator.openPost(
+                    ? event.scrollDelta.dy
-                    context,
+                    : event.scrollDelta.dx;
-                    post: post,
+                if (delta == 0) return;
-                    postsList: posts,
+                final target = (_scrollController.offset + delta * 1.5).clamp(
-                  ),
+                  0.0,
-                  child: Container(
+                  _scrollController.position.maxScrollExtent,
-                    decoration: BoxDecoration(
-                      borderRadius: BorderRadius.circular(14),
-                      border: Border.all(
-                        color: Colors.white.withValues(alpha: 0.15),
-                        width: 1.0,
-                      ),
-                    ),
-                    child: ClipRRect(
-                      borderRadius: BorderRadius.circular(13),
-                      child: Stack(
-                        children: [
-                          SizedBox(
-                            width: 96,
-                            height: 96,
-                            child: CachedNetworkImage(
-                              imageUrl: post.previewUrl.isNotEmpty
-                                  ? post.previewUrl
-                                  : post.sampleUrl,
-                              fit: BoxFit.cover,
-                              placeholder: (_, __) => ColoredBox(
-                                color: Theme.of(context)
-                                    .colorScheme
-                                    .surfaceContainerHighest,
-                              ),
-                              errorWidget: (_, __, ___) => ColoredBox(
-                                color: Theme.of(context)
-                                    .colorScheme
-                                    .surfaceContainerHighest,
-                                child: const Icon(Icons.broken_image_rounded,
-                                    size: 24),
-                              ),
-                            ),
-                          ),
-                          if (isVideo)
-                            Positioned(
-                              bottom: 6,
-                              right: 6,
-                              child: Container(
-                                padding: const EdgeInsets.all(4),
-                                decoration: BoxDecoration(
-                                  color: Colors.black.withValues(alpha: 0.7),
-                                  shape: BoxShape.circle,
-                                ),
-                                child: const Icon(Icons.play_arrow_rounded,
-                                    color: Colors.white, size: 14),
-                              ),
-                            ),
-                        ],
-                      ),
-                    ),
-                  ),
                 );
+                _scrollController.jumpTo(target);
               },
+              child: SizedBox(
+                height: 96,
+                child: ListView.separated(
+                  controller: _scrollController,
+                  scrollDirection: Axis.horizontal,
+                  itemCount: posts.length.clamp(0, 15),
+                  separatorBuilder: (_, __) => const SizedBox(width: 8),
+                  itemBuilder: (context, index) {
+                    final post = posts[index];
+                    final isVideo = MediaUrlSelector.isVideo(post);
+                    return InkWell(
+                      borderRadius: BorderRadius.circular(14),
+                      onTap: () => AppNavigator.openPost(
+                        context,
+                        post: post,
+                        postsList: posts,
+                      ),
+                      child: Container(
+                        decoration: BoxDecoration(
+                          borderRadius: BorderRadius.circular(14),
+                          border: Border.all(
+                            color: Colors.white.withValues(alpha: 0.15),
+                            width: 1.0,
+                          ),
+                        ),
+                        child: ClipRRect(
+                          borderRadius: BorderRadius.circular(13),
+                          child: Stack(
+                            children: [
+                              SizedBox(
+                                width: 96,
+                                height: 96,
+                                child: CachedNetworkImage(
+                                  imageUrl: post.previewUrl.isNotEmpty
+                                      ? post.previewUrl
+                                      : post.sampleUrl,
+                                  memCacheWidth: 200,
+                                  memCacheHeight: 200,
+                                  fit: BoxFit.cover,
+                                  placeholder: (_, __) => ColoredBox(
+                                    color: Theme.of(context)
+                                        .colorScheme
+                                        .surfaceContainerHighest,
+                                  ),
+                                  errorWidget: (_, __, ___) => ColoredBox(
+                                    color: Theme.of(context)
+                                        .colorScheme
+                                        .surfaceContainerHighest,
+                                    child: const Icon(Icons.broken_image_rounded,
+                                        size: 24),
+                                  ),
+                                ),
+                              ),
+                              if (isVideo)
+                                Positioned(
+                                  bottom: 6,
+                                  right: 6,
+                                  child: Container(
+                                    padding: const EdgeInsets.all(4),
+                                    decoration: BoxDecoration(
+                                      color: Colors.black.withValues(alpha: 0.7),
+                                      shape: BoxShape.circle,
+                                    ),
+                                    child: const Icon(Icons.play_arrow_rounded,
+                                        color: Colors.white, size: 14),
+                                  ),
+                                ),
+                            ],
+                          ),
+                        ),
+                      ),
+                    );
+                  },
+                ),
+              ),
             ),
           );
         },
@@ -1706,6 +1788,8 @@ class _ArtistAvatar extends StatelessWidget {
             ? fallback
             : CachedNetworkImage(
                 imageUrl: artist.avatarUrl!,
+                memCacheWidth: 140,
+                memCacheHeight: 140,
                 fit: BoxFit.cover,
                 placeholder: (_, __) => fallback,
                 errorWidget: (_, __, ___) => fallback,

lib/features/collections/presentation/collections_screen.dart

@@ -314,6 +314,8 @@ class _CollectionCard extends ConsumerWidget {
     if (urls.length == 1) {
       return CachedNetworkImage(
         imageUrl: urls[0],
+        memCacheWidth: 260,
+        memCacheHeight: 260,
         fit: BoxFit.cover,
         placeholder: (_, __) => Container(color: scheme.surfaceContainerHighest),
         errorWidget: (_, __, ___) => Container(
@@ -333,6 +335,8 @@ class _CollectionCard extends ConsumerWidget {
           if (i < urls.length)
             CachedNetworkImage(
               imageUrl: urls[i],
+              memCacheWidth: 200,
+              memCacheHeight: 200,
               fit: BoxFit.cover,
               placeholder: (_, __) =>
                   Container(color: scheme.surfaceContainerHighest),

lib/features/favorites/presentation/favorites_screen.dart

@@ -1225,6 +1225,8 @@ class _ArtistCard extends StatelessWidget {
                                   ),
                                   child: CachedNetworkImage(
                                     imageUrl: url,
+                                    memCacheWidth: 128,
+                                    memCacheHeight: 128,
                                     fit: BoxFit.cover,
                                     placeholder: (_, __) => Container(
                                       color: scheme.surfaceContainerHighest,

lib/features/feed/presentation/feed_screen.dart

@@ -144,7 +144,11 @@ class _FeedScreenState extends ConsumerState<FeedScreen>
 
     return Shortcuts(
       shortcuts: {
-        LogicalKeySet(LogicalKeyboardKey.keyR): const _RefreshIntent(),
+        LogicalKeySet(LogicalKeyboardKey.keyR): const _RandomPostIntent(),
+        LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.keyR):
+            const _RefreshIntent(),
+        LogicalKeySet(LogicalKeyboardKey.f5): const _RefreshIntent(),
+        LogicalKeySet(LogicalKeyboardKey.keyV): const _ToggleSelectionIntent(),
         LogicalKeySet(LogicalKeyboardKey.escape): const _ClearSelectionIntent(),
         LogicalKeySet(LogicalKeyboardKey.delete): const _ClearSelectionIntent(),
         LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.keyA):
@@ -158,6 +162,24 @@ class _FeedScreenState extends ConsumerState<FeedScreen>
               return null;
             },
           ),
+          _RandomPostIntent: CallbackAction<_RandomPostIntent>(
+            onInvoke: (_) {
+              final posts = feed.value?.posts;
+              if (posts != null && posts.isNotEmpty) {
+                _openRandom(posts);
+              }
+              return null;
+            },
+          ),
+          _ToggleSelectionIntent: CallbackAction<_ToggleSelectionIntent>(
+            onInvoke: (_) {
+              setState(() {
+                _selectionMode = !_selectionMode;
+                if (!_selectionMode) _selectedKeys.clear();
+              });
+              return null;
+            },
+          ),
           _ClearSelectionIntent: CallbackAction<_ClearSelectionIntent>(
             onInvoke: (_) {
               _clearSelection();
@@ -682,6 +704,14 @@ class _SelectVisibleIntent extends Intent {
   const _SelectVisibleIntent();
 }
 
+class _RandomPostIntent extends Intent {
+  const _RandomPostIntent();
+}
+
+class _ToggleSelectionIntent extends Intent {
+  const _ToggleSelectionIntent();
+}
+
 class _BatchActionBar extends StatelessWidget {
   const _BatchActionBar({
     required this.count,

lib/features/feed/presentation/widgets/feed_toolbar.dart

@@ -110,7 +110,7 @@ class _FeedToolbarState extends State<FeedToolbar> {
               ),
               const SizedBox(width: 8),
               IconButton.filledTonal(
-                tooltip: widget.selectionMode ? 'Выйти из выбора' : 'Выбрать посты',
+                tooltip: widget.selectionMode ? 'Выйти из выбора (Esc)' : 'Выбрать посты (V)',
                 onPressed: widget.onToggleSelectionMode,
                 icon: Icon(widget.selectionMode
                     ? Icons.check_box_rounded
@@ -139,13 +139,13 @@ class _FeedToolbarState extends State<FeedToolbar> {
               ),
               const SizedBox(width: 4),
               IconButton(
-                tooltip: 'Обновить',
+                tooltip: 'Обновить (Ctrl+R / F5)',
                 onPressed: widget.onRefresh,
                 icon: const Icon(Icons.refresh_rounded),
               ),
               const SizedBox(width: 4),
               IconButton.filledTonal(
-                tooltip: 'Случайный пост',
+                tooltip: 'Случайный пост (R)',
                 onPressed: widget.onRandom,
                 icon: const Icon(Icons.casino_rounded),
               ),
@@ -163,41 +163,36 @@ class _FeedToolbarState extends State<FeedToolbar> {
             const SizedBox(height: 8),
           ],
           _HorizontalWheelScroller(
-            height: 36,
+            height: 38,
             builder: (controller) => ListView(
               controller: controller,
               scrollDirection: Axis.horizontal,
               primary: false,
               children: [
+                _LiquidPeriodTabs(
+                  selectedPeriod: widget.topPeriodFilter,
+                  onChanged: widget.onTopPeriodChanged,
+                ),
+                const SizedBox(width: 8),
+                const _ToolbarDivider(),
+                const SizedBox(width: 8),
                 if (widget.providers.isNotEmpty) ...[
-                  FilterChip(
+                  _LiquidProviderPill(
-                    selected: widget.selectedProviderIds.isEmpty,
+                    label: 'Все источники',
-                    label: const Text('Все источники'),
+                    isSelected: widget.selectedProviderIds.isEmpty,
-                    onSelected: (_) => widget.onQuickProviderToggle('__all__'),
+                    icon: Icons.all_inclusive_rounded,
+                    onTap: () => widget.onQuickProviderToggle('__all__'),
                   ),
-                  const SizedBox(width: 8),
+                  const SizedBox(width: 6),
                   for (final provider in widget.providers) ...[
-                    FilterChip(
+                    _LiquidProviderPill(
-                      selected:
+                      label: provider.name,
-                          widget.selectedProviderIds.contains(provider.id),
+                      isSelected: widget.selectedProviderIds.contains(provider.id),
-                      avatar: const Icon(Icons.hub_rounded, size: 15),
+                      icon: Icons.hub_rounded,
-                      label: Text(provider.name),
+                      onTap: () => widget.onQuickProviderToggle(provider.id),
-                      onSelected: (_) =>
-                          widget.onQuickProviderToggle(provider.id),
                     ),
-                    const SizedBox(width: 8),
+                    const SizedBox(width: 6),
                   ],
-                  const SizedBox(width: 4),
-                  const _ToolbarDivider(),
-                  const SizedBox(width: 10),
-                ],
-                for (final period in TopPeriodFilter.values) ...[
-                  ChoiceChip(
-                    selected: widget.topPeriodFilter == period,
-                    label: Text(period.label),
-                    onSelected: (_) => widget.onTopPeriodChanged(period),
-                  ),
-                  const SizedBox(width: 8),
                 ],
               ],
             ),
@@ -289,64 +284,56 @@ class _FeedToolbarState extends State<FeedToolbar> {
               primary: false,
               children: [
                 if (hasActiveFilters || widget.selectedTags.isNotEmpty) ...[
-                  ActionChip(
+                  _LiquidProviderPill(
-                    visualDensity: VisualDensity.compact,
+                    label: 'Сбросить',
-                    avatar: const Icon(Icons.filter_alt_off_rounded, size: 15),
+                    isSelected: false,
-                    label: const Text('Сбросить'),
+                    icon: Icons.filter_alt_off_rounded,
-                    onPressed: widget.onClearFilters,
+                    onTap: widget.onClearFilters,
                   ),
                   const SizedBox(width: 6),
                 ],
-                ActionChip(
+                _LiquidProviderPill(
-                  visualDensity: VisualDensity.compact,
+                  label: 'Обновить',
-                  avatar: const Icon(Icons.refresh_rounded, size: 15),
+                  isSelected: false,
-                  label: const Text('Обновить'),
+                  icon: Icons.refresh_rounded,
-                  onPressed: widget.onRefresh,
+                  onTap: widget.onRefresh,
                 ),
                 const SizedBox(width: 6),
                 const _ToolbarDivider(),
                 const SizedBox(width: 6),
-                FilterChip(
+                _LiquidProviderPill(
-                  visualDensity: VisualDensity.compact,
+                  label: widget.rating ?? 'Рейтинг',
-                  selected: widget.rating != null,
+                  isSelected: widget.rating != null,
-                  avatar: const Icon(Icons.shield_outlined, size: 15),
+                  icon: Icons.shield_outlined,
-                  label: Text(widget.rating ?? 'Рейтинг'),
+                  onTap: widget.onRatingFilter,
-                  onSelected: (_) => widget.onRatingFilter(),
                 ),
                 const SizedBox(width: 6),
                 const _ToolbarDivider(),
                 const SizedBox(width: 6),
+                _LiquidPeriodTabs(
+                  selectedPeriod: widget.topPeriodFilter,
+                  onChanged: widget.onTopPeriodChanged,
+                ),
                 if (widget.providers.isNotEmpty) ...[
-                  FilterChip(
+                  const SizedBox(width: 6),
-                    visualDensity: VisualDensity.compact,
+                  const _ToolbarDivider(),
-                    selected: widget.selectedProviderIds.isEmpty,
+                  const SizedBox(width: 6),
-                    label: const Text('Все'),
+                  _LiquidProviderPill(
-                    onSelected: (_) => widget.onQuickProviderToggle('__all__'),
+                    label: 'Все',
+                    isSelected: widget.selectedProviderIds.isEmpty,
+                    icon: Icons.all_inclusive_rounded,
+                    onTap: () => widget.onQuickProviderToggle('__all__'),
                   ),
                   const SizedBox(width: 6),
                   for (final provider in widget.providers) ...[
-                    FilterChip(
+                    _LiquidProviderPill(
-                      visualDensity: VisualDensity.compact,
+                      label: provider.name,
-                      selected:
+                      isSelected: widget.selectedProviderIds.contains(provider.id),
-                          widget.selectedProviderIds.contains(provider.id),
+                      icon: Icons.hub_rounded,
-                      label: Text(provider.name),
+                      onTap: () => widget.onQuickProviderToggle(provider.id),
-                      onSelected: (_) =>
-                          widget.onQuickProviderToggle(provider.id),
                     ),
                     const SizedBox(width: 6),
                   ],
-                  const SizedBox(width: 2),
-                  const _ToolbarDivider(),
-                  const SizedBox(width: 6),
-                ],
-                for (final period in TopPeriodFilter.values) ...[
-                  ChoiceChip(
-                    visualDensity: VisualDensity.compact,
-                    selected: widget.topPeriodFilter == period,
-                    label: Text(period.label),
-                    onSelected: (_) => widget.onTopPeriodChanged(period),
-                  ),
-                  const SizedBox(width: 6),
                 ],
               ],
             ),
@@ -371,6 +358,227 @@ class _ToolbarDivider extends StatelessWidget {
   }
 }
 
+class _LiquidPeriodTabs extends StatelessWidget {
+  const _LiquidPeriodTabs({
+    required this.selectedPeriod,
+    required this.onChanged,
+  });
+
+  final TopPeriodFilter selectedPeriod;
+  final ValueChanged<TopPeriodFilter> onChanged;
+
+  IconData _iconFor(TopPeriodFilter period) {
+    return switch (period) {
+      TopPeriodFilter.none => Icons.auto_awesome_rounded,
+      TopPeriodFilter.month => Icons.calendar_month_rounded,
+      TopPeriodFilter.year => Icons.calendar_today_rounded,
+      TopPeriodFilter.allTime => Icons.workspace_premium_rounded,
+    };
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
+
+    return Container(
+      padding: const EdgeInsets.all(2.5),
+      decoration: BoxDecoration(
+        color: isDark
+            ? scheme.surfaceContainerHigh.withValues(alpha: 0.55)
+            : scheme.surfaceContainerHighest.withValues(alpha: 0.45),
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(
+          color: isDark
+              ? Colors.white.withValues(alpha: 0.1)
+              : Colors.black.withValues(alpha: 0.06),
+          width: 1,
+        ),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          for (final period in TopPeriodFilter.values) ...[
+            _LiquidPeriodTabItem(
+              period: period,
+              icon: _iconFor(period),
+              isSelected: selectedPeriod == period,
+              onTap: () => onChanged(period),
+            ),
+            if (period != TopPeriodFilter.values.last) const SizedBox(width: 3),
+          ],
+        ],
+      ),
+    );
+  }
+}
+
+class _LiquidPeriodTabItem extends StatelessWidget {
+  const _LiquidPeriodTabItem({
+    required this.period,
+    required this.icon,
+    required this.isSelected,
+    required this.onTap,
+  });
+
+  final TopPeriodFilter period;
+  final IconData icon;
+  final bool isSelected;
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
+
+    return Material(
+      color: Colors.transparent,
+      child: InkWell(
+        onTap: onTap,
+        borderRadius: BorderRadius.circular(13),
+        child: AnimatedContainer(
+          duration: const Duration(milliseconds: 200),
+          curve: Curves.easeOutCubic,
+          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
+          decoration: BoxDecoration(
+            color: isSelected
+                ? (isDark
+                    ? scheme.primary.withValues(alpha: 0.28)
+                    : scheme.primaryContainer.withValues(alpha: 0.85))
+                : Colors.transparent,
+            borderRadius: BorderRadius.circular(13),
+            border: isSelected
+                ? Border.all(
+                    color: scheme.primary.withValues(alpha: isDark ? 0.45 : 0.3),
+                    width: 1,
+                  )
+                : null,
+            boxShadow: isSelected
+                ? [
+                    BoxShadow(
+                      color: scheme.primary.withValues(alpha: isDark ? 0.25 : 0.12),
+                      blurRadius: 8,
+                      offset: const Offset(0, 2),
+                    ),
+                  ]
+                : null,
+          ),
+          child: Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Icon(
+                icon,
+                size: 14,
+                color: isSelected
+                    ? (isDark ? scheme.primary : scheme.onPrimaryContainer)
+                    : scheme.onSurfaceVariant.withValues(alpha: 0.85),
+              ),
+              const SizedBox(width: 6),
+              Text(
+                period.label,
+                style: TextStyle(
+                  fontSize: 12,
+                  fontWeight: isSelected ? FontWeight.w700 : FontWeight.w500,
+                  color: isSelected
+                      ? (isDark ? scheme.primary : scheme.onPrimaryContainer)
+                      : scheme.onSurfaceVariant,
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _LiquidProviderPill extends StatelessWidget {
+  const _LiquidProviderPill({
+    required this.label,
+    required this.isSelected,
+    required this.onTap,
+    this.icon,
+  });
+
+  final String label;
+  final bool isSelected;
+  final VoidCallback onTap;
+  final IconData? icon;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
+
+    return Material(
+      color: Colors.transparent,
+      child: InkWell(
+        onTap: onTap,
+        borderRadius: BorderRadius.circular(14),
+        child: AnimatedContainer(
+          duration: const Duration(milliseconds: 200),
+          curve: Curves.easeOutCubic,
+          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
+          decoration: BoxDecoration(
+            color: isSelected
+                ? (isDark
+                    ? scheme.secondaryContainer.withValues(alpha: 0.35)
+                    : scheme.secondaryContainer.withValues(alpha: 0.7))
+                : (isDark
+                    ? scheme.surfaceContainerHigh.withValues(alpha: 0.4)
+                    : scheme.surfaceContainerHighest.withValues(alpha: 0.35)),
+            borderRadius: BorderRadius.circular(14),
+            border: Border.all(
+              color: isSelected
+                  ? scheme.secondary.withValues(alpha: isDark ? 0.6 : 0.4)
+                  : (isDark
+                      ? Colors.white.withValues(alpha: 0.08)
+                      : Colors.black.withValues(alpha: 0.05)),
+              width: 1,
+            ),
+            boxShadow: isSelected
+                ? [
+                    BoxShadow(
+                      color: scheme.secondary.withValues(alpha: isDark ? 0.2 : 0.08),
+                      blurRadius: 6,
+                    ),
+                  ]
+                : null,
+          ),
+          child: Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              if (icon != null) ...[
+                Icon(
+                  icon,
+                  size: 14,
+                  color: isSelected
+                      ? (isDark ? scheme.secondary : scheme.onSecondaryContainer)
+                      : scheme.onSurfaceVariant.withValues(alpha: 0.8),
+                ),
+                const SizedBox(width: 5),
+              ],
+              Text(
+                label,
+                style: TextStyle(
+                  fontSize: 12,
+                  fontWeight: isSelected ? FontWeight.w700 : FontWeight.w500,
+                  color: isSelected
+                      ? (isDark ? scheme.secondary : scheme.onSecondaryContainer)
+                      : scheme.onSurfaceVariant,
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
 class _HorizontalWheelScroller extends StatefulWidget {
   const _HorizontalWheelScroller({
     required this.builder,

lib/features/post/presentation/post_details_screen.dart

@@ -172,6 +172,8 @@ class PostDetailsScreen extends ConsumerWidget {
               LogicalKeySet(LogicalKeyboardKey.keyC):
                   const _AddCollectionIntent(),
               LogicalKeySet(LogicalKeyboardKey.keyS): const _DownloadIntent(),
+              LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.keyS):
+                  const _DownloadIntent(),
               LogicalKeySet(LogicalKeyboardKey.escape): const _CloseIntent(),
             },
             child: Actions(
@@ -1153,6 +1155,8 @@ class _NeighborStrip extends StatelessWidget {
                 imageUrl: post.previewUrl.isNotEmpty
                     ? post.previewUrl
                     : post.sampleUrl,
+                memCacheWidth: 160,
+                memCacheHeight: 160,
                 fit: BoxFit.cover,
                 errorWidget: (_, __, ___) =>
                     const Center(child: Icon(Icons.broken_image_rounded)),

lib/features/post/presentation/widgets/post_media_viewer.dart

@@ -78,6 +78,8 @@ class _PostMediaViewerState extends State<PostMediaViewer>
   String? _videoError;
   bool _retriedFormatError = false;
   bool _softwareDecodingFallback = false;
+  late bool _useSoftwareDecoding =
+      Platform.isLinux || Platform.isWindows || Platform.isMacOS;
   Timer? _hideTimer;
   StreamSubscription<String>? _errorSubscription;
   StreamSubscription<Duration>? _positionSubscription;
@@ -109,6 +111,8 @@ class _PostMediaViewerState extends State<PostMediaViewer>
       _videoError = null;
       _retriedFormatError = false;
       _softwareDecodingFallback = false;
+      _useSoftwareDecoding =
+          Platform.isLinux || Platform.isWindows || Platform.isMacOS;
       _imageUrls = _buildImageUrls(widget.post);
       _videoUrls = _buildVideoUrls(widget.post);
       if (_isPlayableMedia(widget.post) && _videoUrls.isNotEmpty) {
@@ -226,6 +230,11 @@ class _PostMediaViewerState extends State<PostMediaViewer>
               aspectRatio: widget.post.width > 0 && widget.post.height > 0
                   ? widget.post.width / widget.post.height
                   : 16 / 9,
+              previewUrl: widget.post.previewUrl.isNotEmpty
+                  ? widget.post.previewUrl
+                  : widget.post.sampleUrl,
+              isSoftwareDecoding: _useSoftwareDecoding,
+              onToggleDecoder: _toggleDecoderMode,
               controlsVisible: _controlsVisible,
               coverVideo: _coverVideo,
               muted: _muted,
@@ -317,10 +326,16 @@ class _PostMediaViewerState extends State<PostMediaViewer>
         ),
       );
     } else {
+      final mq = MediaQuery.maybeOf(context);
+      final dpr = mq?.devicePixelRatio ?? 1.5;
+      final screenWidth = mq?.size.width ?? 1280;
+      final maxCacheWidth =
+          (screenWidth * dpr * 1.5).round().clamp(1080, 2560);
       image = CachedNetworkImage(
         key: ValueKey(url),
         imageUrl: url,
         httpHeaders: headers,
+        memCacheWidth: maxCacheWidth,
         fit: BoxFit.contain,
         placeholder: (context, url) =>
             const Center(child: CircularProgressIndicator()),
@@ -383,16 +398,54 @@ class _PostMediaViewerState extends State<PostMediaViewer>
           ),
       ],
     );
+
+    final interactiveChild = _imageUrls.length > 1
+        ? Shortcuts(
+            shortcuts: {
+              LogicalKeySet(LogicalKeyboardKey.arrowLeft):
+                  const _PrevImageIntent(),
+              LogicalKeySet(LogicalKeyboardKey.keyA): const _PrevImageIntent(),
+              LogicalKeySet(LogicalKeyboardKey.arrowRight):
+                  const _NextImageIntent(),
+              LogicalKeySet(LogicalKeyboardKey.keyD): const _NextImageIntent(),
+            },
+            child: Actions(
+              actions: {
+                _PrevImageIntent: CallbackAction<_PrevImageIntent>(
+                  onInvoke: (_) {
+                    if (_imageIndex > 0) {
+                      setState(() => _imageIndex--);
+                    }
+                    return null;
+                  },
+                ),
+                _NextImageIntent: CallbackAction<_NextImageIntent>(
+                  onInvoke: (_) {
+                    if (_imageIndex < _imageUrls.length - 1) {
+                      setState(() => _imageIndex++);
+                    }
+                    return null;
+                  },
+                ),
+              },
+              child: Focus(
+                autofocus: true,
+                child: child,
+              ),
+            ),
+          )
+        : child;
+
     return LayoutBuilder(
       builder: (context, constraints) {
         if (constraints.hasBoundedWidth && constraints.hasBoundedHeight) {
           return SizedBox(
             width: constraints.maxWidth,
             height: constraints.maxHeight,
-            child: child,
+            child: interactiveChild,
           );
         }
-        return child;
+        return interactiveChild;
       },
     );
   }
@@ -400,11 +453,12 @@ class _PostMediaViewerState extends State<PostMediaViewer>
   void _initializeVideo() {
     MediaKit.ensureInitialized();
     _player = Player();
+    final bool enableHw = !_useSoftwareDecoding && !_softwareDecodingFallback;
     _controller = VideoController(
       _player!,
       configuration: VideoControllerConfiguration(
-        enableHardwareAcceleration: !_softwareDecodingFallback,
+        enableHardwareAcceleration: enableHw,
-        hwdec: _softwareDecodingFallback ? 'no' : 'auto-safe',
+        hwdec: enableHw ? (Platform.isAndroid ? 'auto-safe' : 'auto') : 'no',
       ),
     );
     _applyVolume();
@@ -479,6 +533,7 @@ class _PostMediaViewerState extends State<PostMediaViewer>
             lower.contains('failed to recognize file format'))) {
       _retriedFormatError = true;
       _softwareDecodingFallback = true;
+      _useSoftwareDecoding = true;
       _disposeVideo();
       await Future<void>.delayed(const Duration(milliseconds: 250));
       if (mounted) {
@@ -496,6 +551,7 @@ class _PostMediaViewerState extends State<PostMediaViewer>
     _videoIndex = 0;
     _retriedFormatError = false;
     _softwareDecodingFallback = true;
+    _useSoftwareDecoding = true;
     _disposeVideo();
     await Future<void>.delayed(const Duration(milliseconds: 150));
     if (mounted) {
@@ -503,6 +559,26 @@ class _PostMediaViewerState extends State<PostMediaViewer>
     }
   }
 
+  void _toggleDecoderMode() {
+    setState(() {
+      _useSoftwareDecoding = !_useSoftwareDecoding;
+      _softwareDecodingFallback = false;
+      _retriedFormatError = false;
+    });
+    _disposeVideo();
+    _initializeVideo();
+    ScaffoldMessenger.maybeOf(context)?.showSnackBar(
+      SnackBar(
+        content: Text(
+          _useSoftwareDecoding
+              ? 'Включено программное декодирование (S/W)'
+              : 'Включено аппаратное декодирование (H/W)',
+        ),
+        duration: const Duration(seconds: 2),
+      ),
+    );
+  }
+
   void _disposeVideo() {
     _hideTimer?.cancel();
     _errorSubscription?.cancel();
@@ -644,6 +720,11 @@ class _PostMediaViewerState extends State<PostMediaViewer>
           halfVolume: _halfVolume,
           coverVideo: _coverVideo,
           initialVolume: _currentVolume,
+          previewUrl: widget.post.previewUrl.isNotEmpty
+              ? widget.post.previewUrl
+              : widget.post.sampleUrl,
+          isSoftwareDecoding: _useSoftwareDecoding,
+          onToggleDecoder: _toggleDecoderMode,
           errorMessage: _videoError,
           onRetry: _retryVideo,
           onChanged: (snapshot) {
@@ -739,6 +820,48 @@ class _TogglePlayIntent extends Intent {
   const _TogglePlayIntent();
 }
 
+class _SeekVideoIntent extends Intent {
+  const _SeekVideoIntent(this.seconds);
+  final int seconds;
+}
+
+class _VolumeVideoIntent extends Intent {
+  const _VolumeVideoIntent(this.deltaY);
+  final double deltaY;
+}
+
+class _MuteVideoIntent extends Intent {
+  const _MuteVideoIntent();
+}
+
+class _FullscreenVideoIntent extends Intent {
+  const _FullscreenVideoIntent();
+}
+
+class _LoopVideoIntent extends Intent {
+  const _LoopVideoIntent();
+}
+
+class _ZoomInIntent extends Intent {
+  const _ZoomInIntent();
+}
+
+class _ZoomOutIntent extends Intent {
+  const _ZoomOutIntent();
+}
+
+class _ResetZoomIntent extends Intent {
+  const _ResetZoomIntent();
+}
+
+class _PrevImageIntent extends Intent {
+  const _PrevImageIntent();
+}
+
+class _NextImageIntent extends Intent {
+  const _NextImageIntent();
+}
+
 class _UnsupportedSwfPanel extends StatelessWidget {
   const _UnsupportedSwfPanel();
 
@@ -798,6 +921,9 @@ class _FullscreenVideoPage extends StatefulWidget {
     required this.halfVolume,
     required this.coverVideo,
     this.initialVolume = 100.0,
+    this.previewUrl,
+    required this.isSoftwareDecoding,
+    required this.onToggleDecoder,
     required this.errorMessage,
     required this.onRetry,
     required this.onChanged,
@@ -812,6 +938,9 @@ class _FullscreenVideoPage extends StatefulWidget {
   final bool halfVolume;
   final bool coverVideo;
   final double initialVolume;
+  final String? previewUrl;
+  final bool isSoftwareDecoding;
+  final VoidCallback onToggleDecoder;
   final String? errorMessage;
   final VoidCallback onRetry;
   final ValueChanged<VideoPlaybackSnapshot> onChanged;
@@ -911,6 +1040,8 @@ class _FullscreenVideoPageState extends State<_FullscreenVideoPage> {
           shortcuts: {
             LogicalKeySet(LogicalKeyboardKey.escape): const _CloseVideoIntent(),
             LogicalKeySet(LogicalKeyboardKey.space): const _TogglePlayIntent(),
+            LogicalKeySet(LogicalKeyboardKey.keyK): const _TogglePlayIntent(),
+            LogicalKeySet(LogicalKeyboardKey.keyF): const _CloseVideoIntent(),
           },
           child: Actions(
             actions: {
@@ -934,6 +1065,9 @@ class _FullscreenVideoPageState extends State<_FullscreenVideoPage> {
                 player: widget.player,
                 controller: widget.controller,
                 aspectRatio: widget.aspectRatio,
+                previewUrl: widget.previewUrl,
+                isSoftwareDecoding: widget.isSoftwareDecoding,
+                onToggleDecoder: widget.onToggleDecoder,
                 controlsVisible: _controlsVisible,
                 coverVideo: _coverVideo,
                 muted: _muted,
@@ -1485,6 +1619,9 @@ class _VideoSurface extends StatefulWidget {
     required this.player,
     required this.controller,
     required this.aspectRatio,
+    this.previewUrl,
+    required this.isSoftwareDecoding,
+    required this.onToggleDecoder,
     required this.controlsVisible,
     required this.coverVideo,
     required this.muted,
@@ -1509,6 +1646,9 @@ class _VideoSurface extends StatefulWidget {
   final Player player;
   final VideoController controller;
   final double aspectRatio;
+  final String? previewUrl;
+  final bool isSoftwareDecoding;
+  final VoidCallback onToggleDecoder;
   final bool controlsVisible;
   final bool coverVideo;
   final bool muted;
@@ -1667,15 +1807,22 @@ class _VideoSurfaceState extends State<_VideoSurface> {
         return Stack(
           fit: StackFit.expand,
           children: [
-            ColoredBox(
+            if (widget.previewUrl != null && widget.previewUrl!.isNotEmpty)
-              color: Colors.black,
+              Positioned.fill(
-              child: Video(
+                child: CachedNetworkImage(
-                controller: widget.controller,
+                  imageUrl: widget.previewUrl!,
-                fit: widget.coverVideo ? BoxFit.cover : BoxFit.contain,
+                  fit: widget.coverVideo ? BoxFit.cover : BoxFit.contain,
-                controls: null,
+                  memCacheWidth: 1920,
-                pauseUponEnteringBackgroundMode: false,
+                  memCacheHeight: 1080,
-                resumeUponEnteringForegroundMode: false,
+                ),
               ),
+            Video(
+              controller: widget.controller,
+              fit: widget.coverVideo ? BoxFit.cover : BoxFit.contain,
+              fill: Colors.transparent,
+              controls: null,
+              pauseUponEnteringBackgroundMode: false,
+              resumeUponEnteringForegroundMode: false,
             ),
             if (_currentBrightness < 0.99)
               Positioned.fill(
@@ -1754,6 +1901,8 @@ class _VideoSurfaceState extends State<_VideoSurface> {
                   fullscreen: widget.fullscreen,
                   isLocked: _isLocked,
                   isLandscape: widget.isLandscape,
+                  isSoftwareDecoding: widget.isSoftwareDecoding,
+                  onToggleDecoder: widget.onToggleDecoder,
                   onToggleOrientation: widget.onToggleOrientation,
                   onToggleLock: () => setState(() => _isLocked = !_isLocked),
                   onToggleFit: widget.onToggleFit,
@@ -1771,16 +1920,87 @@ class _VideoSurfaceState extends State<_VideoSurface> {
       },
     );
 
-    return MouseRegion(
+    return Shortcuts(
-      onHover: (_) => widget.onInteract(),
+      shortcuts: {
-      child: ClipRRect(
+        LogicalKeySet(LogicalKeyboardKey.space): const _TogglePlayIntent(),
-        borderRadius: BorderRadius.circular(widget.fullscreen ? 0 : 10),
+        LogicalKeySet(LogicalKeyboardKey.keyK): const _TogglePlayIntent(),
-        child: widget.fullscreen
+        LogicalKeySet(LogicalKeyboardKey.arrowLeft): const _SeekVideoIntent(-5),
-            ? SizedBox.expand(child: child)
+        LogicalKeySet(LogicalKeyboardKey.keyJ): const _SeekVideoIntent(-5),
-            : AspectRatio(
+        LogicalKeySet(LogicalKeyboardKey.arrowRight): const _SeekVideoIntent(5),
-                aspectRatio: widget.aspectRatio.clamp(0.35, 2.4),
+        LogicalKeySet(LogicalKeyboardKey.keyL): const _SeekVideoIntent(5),
-                child: child,
+        LogicalKeySet(LogicalKeyboardKey.shift, LogicalKeyboardKey.arrowLeft):
-              ),
+            const _SeekVideoIntent(-15),
+        LogicalKeySet(LogicalKeyboardKey.shift, LogicalKeyboardKey.arrowRight):
+            const _SeekVideoIntent(15),
+        LogicalKeySet(LogicalKeyboardKey.arrowUp): const _VolumeVideoIntent(-10),
+        LogicalKeySet(LogicalKeyboardKey.arrowDown): const _VolumeVideoIntent(10),
+        LogicalKeySet(LogicalKeyboardKey.keyM): const _MuteVideoIntent(),
+        LogicalKeySet(LogicalKeyboardKey.keyF): const _FullscreenVideoIntent(),
+        LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.keyL):
+            const _LoopVideoIntent(),
+      },
+      child: Actions(
+        actions: {
+          _TogglePlayIntent: CallbackAction<_TogglePlayIntent>(
+            onInvoke: (_) {
+              if (widget.player.state.playing) {
+                widget.player.pause();
+              } else {
+                if (widget.player.state.completed) {
+                  widget.player.seek(Duration.zero);
+                }
+                widget.player.play();
+              }
+              widget.onInteract();
+              return null;
+            },
+          ),
+          _SeekVideoIntent: CallbackAction<_SeekVideoIntent>(
+            onInvoke: (intent) {
+              _seekBy(Duration(seconds: intent.seconds));
+              return null;
+            },
+          ),
+          _VolumeVideoIntent: CallbackAction<_VolumeVideoIntent>(
+            onInvoke: (intent) {
+              _adjustVolume(intent.deltaY);
+              return null;
+            },
+          ),
+          _MuteVideoIntent: CallbackAction<_MuteVideoIntent>(
+            onInvoke: (_) {
+              widget.onToggleMute();
+              return null;
+            },
+          ),
+          _FullscreenVideoIntent: CallbackAction<_FullscreenVideoIntent>(
+            onInvoke: (_) {
+              widget.onFullscreen();
+              return null;
+            },
+          ),
+          _LoopVideoIntent: CallbackAction<_LoopVideoIntent>(
+            onInvoke: (_) {
+              widget.onToggleLoop();
+              return null;
+            },
+          ),
+        },
+        child: Focus(
+          autofocus: true,
+          child: MouseRegion(
+            onHover: (_) => widget.onInteract(),
+            child: ClipRRect(
+              borderRadius: BorderRadius.circular(widget.fullscreen ? 0 : 10),
+              child: widget.fullscreen
+                  ? SizedBox.expand(child: child)
+                  : AspectRatio(
+                      aspectRatio: widget.aspectRatio.clamp(0.35, 2.4),
+                      child: child,
+                    ),
+            ),
+          ),
+        ),
       ),
     );
   }
@@ -1959,80 +2179,133 @@ class _ZoomableImageState extends State<_ZoomableImage> {
     super.dispose();
   }
 
+  void _zoomIn() {
+    final currentScale = _controller.value.getMaxScaleOnAxis();
+    final newScale = (currentScale * 1.35).clamp(1.0, 6.0);
+    _controller.value = Matrix4.identity()..scaleByDouble(newScale, newScale, 1, 1);
+    if (mounted) setState(() => _zoomed = newScale > 1.02);
+    _setLocked(_zoomed);
+  }
+
+  void _zoomOut() {
+    final currentScale = _controller.value.getMaxScaleOnAxis();
+    final newScale = (currentScale / 1.35).clamp(1.0, 6.0);
+    if (newScale <= 1.02) {
+      _controller.value = Matrix4.identity();
+      if (mounted) setState(() => _zoomed = false);
+      _setLocked(false);
+    } else {
+      _controller.value = Matrix4.identity()..scaleByDouble(newScale, newScale, 1, 1);
+      if (mounted) setState(() => _zoomed = true);
+      _setLocked(true);
+    }
+  }
+
+  void _resetZoom() {
+    _controller.value = Matrix4.identity();
+    if (mounted) setState(() => _zoomed = false);
+    _setLocked(false);
+  }
+
   @override
   Widget build(BuildContext context) {
-    return LayoutBuilder(
+    return Shortcuts(
-      builder: (context, constraints) {
+      shortcuts: {
-        final hasFrame =
+        LogicalKeySet(LogicalKeyboardKey.equal): const _ZoomInIntent(),
-            constraints.hasBoundedWidth && constraints.hasBoundedHeight;
+        LogicalKeySet(LogicalKeyboardKey.add): const _ZoomInIntent(),
-        final child = hasFrame
+        LogicalKeySet(LogicalKeyboardKey.numpadAdd): const _ZoomInIntent(),
-            ? SizedBox(
+        LogicalKeySet(LogicalKeyboardKey.minus): const _ZoomOutIntent(),
-                width: constraints.maxWidth,
+        LogicalKeySet(LogicalKeyboardKey.numpadSubtract): const _ZoomOutIntent(),
-                height: constraints.maxHeight,
+        LogicalKeySet(LogicalKeyboardKey.digit0): const _ResetZoomIntent(),
-                child: widget.child,
+        LogicalKeySet(LogicalKeyboardKey.numpad0): const _ResetZoomIntent(),
-              )
+        LogicalKeySet(LogicalKeyboardKey.escape): const _ResetZoomIntent(),
-            : widget.child;
-        return Listener(
-          onPointerSignal: (signal) {
-            if (signal is PointerScrollEvent) {
-              final scaleDelta = signal.scrollDelta.dy < 0 ? 1.15 : 0.85;
-              final currentScale = _controller.value.getMaxScaleOnAxis();
-              final newScale = (currentScale * scaleDelta).clamp(1.0, 6.0);
-              if (newScale <= 1.02) {
-                _controller.value = Matrix4.identity();
-                if (mounted) setState(() => _zoomed = false);
-                _setLocked(false);
-              } else {
-                final focalPoint = signal.localPosition;
-                _controller.value = Matrix4.identity()
-                  ..translateByDouble(
-                      -focalPoint.dx * (newScale - 1),
-                      -focalPoint.dy * (newScale - 1),
-                      0,
-                      1)
-                  ..scaleByDouble(newScale, newScale, 1, 1);
-                if (mounted) setState(() => _zoomed = true);
-                _setLocked(true);
-              }
-            }
-          },
-          onPointerDown: (_) {
-            _pointerCount++;
-            if (_pointerCount >= 2 || _zoomed) {
-              _setLocked(true);
-            }
-          },
-          onPointerUp: (_) => _releasePointer(),
-          onPointerCancel: (_) => _releasePointer(),
-          child: GestureDetector(
-            behavior: HitTestBehavior.opaque,
-            onDoubleTapDown: (details) => _doubleTapDetails = details,
-            onDoubleTap: _toggleZoom,
-            child: InteractiveViewer(
-              transformationController: _controller,
-              minScale: 1,
-              maxScale: 6,
-              boundaryMargin: const EdgeInsets.all(160),
-              panEnabled: _zoomed,
-              scaleEnabled: true,
-              clipBehavior: Clip.none,
-              onInteractionStart: (_) {
-                if (_pointerCount >= 2 || _zoomed) _setLocked(true);
-              },
-              onInteractionEnd: (_) {
-                final scale = _controller.value.getMaxScaleOnAxis();
-                final nextZoomed = scale > 1.03;
-                if (!nextZoomed) {
-                  _controller.value = Matrix4.identity();
-                }
-                if (mounted) setState(() => _zoomed = nextZoomed);
-                _setLocked(nextZoomed || _pointerCount >= 2);
-              },
-              child: child,
-            ),
-          ),
-        );
       },
+      child: Actions(
+        actions: {
+          _ZoomInIntent: CallbackAction<_ZoomInIntent>(
+            onInvoke: (_) {
+              _zoomIn();
+              return null;
+            },
+          ),
+          _ZoomOutIntent: CallbackAction<_ZoomOutIntent>(
+            onInvoke: (_) {
+              _zoomOut();
+              return null;
+            },
+          ),
+          _ResetZoomIntent: CallbackAction<_ResetZoomIntent>(
+            onInvoke: (_) {
+              if (_zoomed) {
+                _resetZoom();
+              }
+              return null;
+            },
+          ),
+        },
+        child: Focus(
+          autofocus: true,
+          child: LayoutBuilder(
+            builder: (context, constraints) {
+              final hasFrame =
+                  constraints.hasBoundedWidth && constraints.hasBoundedHeight;
+              final child = hasFrame
+                  ? SizedBox(
+                      width: constraints.maxWidth,
+                      height: constraints.maxHeight,
+                      child: widget.child,
+                    )
+                  : widget.child;
+              return Listener(
+                onPointerDown: (_) {
+                  _pointerCount++;
+                  if (_pointerCount >= 2 || _zoomed) {
+                    _setLocked(true);
+                  }
+                },
+                onPointerUp: (_) => _releasePointer(),
+                onPointerCancel: (_) => _releasePointer(),
+                child: GestureDetector(
+                  behavior: HitTestBehavior.opaque,
+                  onDoubleTapDown: (details) => _doubleTapDetails = details,
+                  onDoubleTap: _toggleZoom,
+                  child: InteractiveViewer(
+                    transformationController: _controller,
+                    minScale: 1,
+                    maxScale: 6,
+                    scaleFactor: 1000000.0,
+                    boundaryMargin: const EdgeInsets.all(160),
+                    panEnabled: _zoomed,
+                    scaleEnabled: true,
+                    clipBehavior: Clip.none,
+                    onInteractionStart: (_) {
+                      if (_pointerCount >= 2 || _zoomed) _setLocked(true);
+                    },
+                    onInteractionEnd: (_) {
+                      final scale = _controller.value.getMaxScaleOnAxis();
+                      final nextZoomed = scale > 1.03;
+                      if (!nextZoomed) {
+                        _controller.value = Matrix4.identity();
+                      }
+                      if (mounted) setState(() => _zoomed = nextZoomed);
+                      _setLocked(nextZoomed || _pointerCount >= 2);
+                    },
+                    child: Listener(
+                      onPointerSignal: (event) {
+                        if (event is PointerScrollEvent) {
+                          GestureBinding.instance.pointerSignalResolver
+                              .register(event, (_) {});
+                        }
+                      },
+                      child: child,
+                    ),
+                  ),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
     );
   }
 
@@ -2441,6 +2714,8 @@ class _VideoControls extends StatefulWidget {
     required this.fullscreen,
     required this.isLocked,
     this.isLandscape,
+    required this.isSoftwareDecoding,
+    required this.onToggleDecoder,
     this.onToggleOrientation,
     required this.onToggleLock,
     required this.onToggleFit,
@@ -2460,6 +2735,8 @@ class _VideoControls extends StatefulWidget {
   final bool fullscreen;
   final bool isLocked;
   final bool? isLandscape;
+  final bool isSoftwareDecoding;
+  final VoidCallback onToggleDecoder;
   final VoidCallback? onToggleOrientation;
   final VoidCallback onToggleLock;
   final VoidCallback onToggleFit;
@@ -2559,6 +2836,17 @@ class _VideoControlsState extends State<_VideoControls> {
                         onPressed: widget.onToggleLock,
                       ),
                       const Spacer(),
+                      _RoundControlButton(
+                        tooltip: widget.isSoftwareDecoding
+                            ? 'Декодер: S/W (программный). Нажмите для переключения на H/W'
+                            : 'Декодер: H/W (аппаратный). Нажмите для переключения на S/W',
+                        selected: !widget.isSoftwareDecoding,
+                        icon: widget.isSoftwareDecoding
+                            ? Icons.memory_rounded
+                            : Icons.speed_rounded,
+                        onPressed: widget.onToggleDecoder,
+                      ),
+                      const SizedBox(width: 8),
                       _SpeedBadgeButton(
                         currentRate: currentRate,
                         onSelected: (newRate) => widget.player.setRate(newRate),

lib/features/settings/presentation/settings_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'dart:ui';
 
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart' hide appBuildNumber;
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -1439,7 +1440,7 @@ class _SettingsIconBadge extends StatelessWidget {
   }
 }
 
-class _CategoryQuickNav extends StatelessWidget {
+class _CategoryQuickNav extends StatefulWidget {
   const _CategoryQuickNav({
     required this.categories,
     required this.onSelect,
@@ -1449,103 +1450,143 @@ class _CategoryQuickNav extends StatelessWidget {
       categories;
   final ValueChanged<GlobalKey> onSelect;
 
+  @override
+  State<_CategoryQuickNav> createState() => _CategoryQuickNavState();
+}
+
+class _CategoryQuickNavState extends State<_CategoryQuickNav> {
+  final ScrollController _scrollController = ScrollController();
+  bool _isHovered = false;
+
+  @override
+  void dispose() {
+    _scrollController.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final isDark = theme.brightness == Brightness.dark;
 
-    return SizedBox(
+    return MouseRegion(
-      height: 44,
+      onEnter: (_) => _isHovered = true,
-      child: ListView.separated(
+      onExit: (_) => _isHovered = false,
-        padding: const EdgeInsets.symmetric(horizontal: 16),
+      child: Listener(
-        scrollDirection: Axis.horizontal,
+        onPointerSignal: (event) {
-        itemCount: categories.length,
+          if (!_isHovered ||
-        separatorBuilder: (_, __) => const SizedBox(width: 8),
+              event is! PointerScrollEvent ||
-        itemBuilder: (context, index) {
+              !_scrollController.hasClients) {
-          final cat = categories[index];
+            return;
-          return Container(
+          }
-            decoration: BoxDecoration(
+          final delta = event.scrollDelta.dy != 0
-              borderRadius: BorderRadius.circular(22),
+              ? event.scrollDelta.dy
-              boxShadow: [
+              : event.scrollDelta.dx;
-                BoxShadow(
+          if (delta == 0) return;
-                  color: isDark
+          final target = (_scrollController.offset + delta * 1.5).clamp(
-                      ? Colors.black.withValues(alpha: 0.25)
+            0.0,
-                      : cat.color.withValues(alpha: 0.12),
+            _scrollController.position.maxScrollExtent,
-                  blurRadius: 8,
+          );
-                  offset: const Offset(0, 2.5),
+          _scrollController.jumpTo(target);
+        },
+        child: SizedBox(
+          height: 44,
+          child: ListView.separated(
+            controller: _scrollController,
+            padding: const EdgeInsets.symmetric(horizontal: 16),
+            scrollDirection: Axis.horizontal,
+            itemCount: widget.categories.length,
+            separatorBuilder: (_, __) => const SizedBox(width: 8),
+            itemBuilder: (context, index) {
+              final cat = widget.categories[index];
+              return Container(
+                decoration: BoxDecoration(
+                  borderRadius: BorderRadius.circular(22),
+                  boxShadow: [
+                    BoxShadow(
+                      color: isDark
+                          ? Colors.black.withValues(alpha: 0.25)
+                          : cat.color.withValues(alpha: 0.12),
+                      blurRadius: 8,
+                      offset: const Offset(0, 2.5),
+                    ),
+                  ],
                 ),
-              ],
+                child: ClipRRect(
-            ),
+                  borderRadius: BorderRadius.circular(22),
-            child: ClipRRect(
+                  child: BackdropFilter(
-              borderRadius: BorderRadius.circular(22),
+                    filter: ImageFilter.blur(sigmaX: 16, sigmaY: 16),
-              child: BackdropFilter(
+                    child: Material(
-                filter: ImageFilter.blur(sigmaX: 16, sigmaY: 16),
+                      color: isDark
-                child: Material(
+                          ? theme.colorScheme.surfaceContainerHigh
-                  color: isDark
+                              .withValues(alpha: 0.60)
-                      ? theme.colorScheme.surfaceContainerHigh.withValues(alpha: 0.60)
+                          : Colors.white.withValues(alpha: 0.82),
-                      : Colors.white.withValues(alpha: 0.82),
+                      child: InkWell(
-                  child: InkWell(
-                    borderRadius: BorderRadius.circular(22),
-                    onTap: () {
-                      HapticFeedback.selectionClick();
-                      onSelect(cat.key);
-                    },
-                    child: Container(
-                      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 7),
-                      decoration: BoxDecoration(
                         borderRadius: BorderRadius.circular(22),
-                        border: Border.all(
+                        onTap: () {
-                          color: isDark
+                          HapticFeedback.selectionClick();
-                              ? Colors.white.withValues(alpha: 0.18)
+                          widget.onSelect(cat.key);
-                              : Colors.white.withValues(alpha: 0.85),
+                        },
-                          width: 1.1,
+                        child: Container(
-                        ),
+                          padding: const EdgeInsets.symmetric(
-                      ),
+                              horizontal: 12, vertical: 7),
-                      child: Row(
+                          decoration: BoxDecoration(
-                        mainAxisSize: MainAxisSize.min,
+                            borderRadius: BorderRadius.circular(22),
-                        children: [
+                            border: Border.all(
-                          Container(
+                              color: isDark
-                            width: 24,
+                                  ? Colors.white.withValues(alpha: 0.18)
-                            height: 24,
+                                  : Colors.white.withValues(alpha: 0.85),
-                            decoration: BoxDecoration(
+                              width: 1.1,
-                              gradient: LinearGradient(
+                            ),
-                                begin: Alignment.topLeft,
+                          ),
-                                end: Alignment.bottomRight,
+                          child: Row(
-                                colors: [
+                            mainAxisSize: MainAxisSize.min,
-                                  cat.color,
+                            children: [
-                                  cat.color.withValues(alpha: 0.82),
+                              Container(
-                                ],
+                                width: 24,
-                              ),
+                                height: 24,
-                              borderRadius: BorderRadius.circular(7),
+                                decoration: BoxDecoration(
-                              boxShadow: [
+                                  gradient: LinearGradient(
-                                BoxShadow(
+                                    begin: Alignment.topLeft,
-                                  color: cat.color.withValues(alpha: 0.35),
+                                    end: Alignment.bottomRight,
-                                  blurRadius: 5,
+                                    colors: [
-                                  offset: const Offset(0, 1.5),
+                                      cat.color,
+                                      cat.color.withValues(alpha: 0.82),
+                                    ],
+                                  ),
+                                  borderRadius: BorderRadius.circular(7),
+                                  boxShadow: [
+                                    BoxShadow(
+                                      color: cat.color.withValues(alpha: 0.35),
+                                      blurRadius: 5,
+                                      offset: const Offset(0, 1.5),
+                                    ),
+                                  ],
                                 ),
-                              ],
+                                child: Center(
-                            ),
+                                  child: Icon(cat.icon,
-                            child: Center(
+                                      size: 14, color: Colors.white),
-                              child: Icon(cat.icon, size: 14, color: Colors.white),
+                                ),
-                            ),
+                              ),
+                              const SizedBox(width: 8),
+                              Text(
+                                cat.label,
+                                style: theme.textTheme.labelLarge?.copyWith(
+                                  fontWeight: FontWeight.w600,
+                                  letterSpacing: -0.2,
+                                ),
+                              ),
+                            ],
                           ),
-                          const SizedBox(width: 8),
+                        ),
-                          Text(
-                            cat.label,
-                            style: theme.textTheme.labelLarge?.copyWith(
-                              fontWeight: FontWeight.w600,
-                              letterSpacing: -0.2,
-                            ),
-                          ),
-                        ],
                       ),
                     ),
                   ),
                 ),
-              ),
+              );
-            ),
+            },
-          );
+          ),
-        },
+        ),
       ),
     );
   }

lib/features/viewed/presentation/viewed_screen.dart

@@ -427,6 +427,8 @@ class _ViewedPostTile extends StatelessWidget {
                                   )
                                 : CachedNetworkImage(
                                     imageUrl: image,
+                                    memCacheWidth: 320,
+                                    memCacheHeight: 320,
                                     fit: BoxFit.cover,
                                     placeholder: (_, __) => Container(
                                       color: scheme.surfaceContainerHighest,

lib/main.dart

@@ -1,9 +1,14 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:media_kit/media_kit.dart';
 
 import 'app/app.dart';
 
 void main() {
   WidgetsFlutterBinding.ensureInitialized();
+  MediaKit.ensureInitialized();
+  // Optimize image cache to prevent memory bloat and OOM crashes
+  PaintingBinding.instance.imageCache.maximumSizeBytes = 180 * 1024 * 1024; // 180 MB
+  PaintingBinding.instance.imageCache.maximumSize = 120; // 120 images
   runApp(const ProviderScope(child: GelRuleApp()));
 }

lib/shared/widgets/app_shell.dart

@@ -5,11 +5,12 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 
 import '../../app/app.dart';
-import '../../app/motion.dart';
 import '../../app/responsive.dart';
 import '../../app/router.dart';
 import '../../backend/backend.dart';
 import '../../core/utils/result.dart';
+import '../../features/feed/presentation/feed_controller.dart';
+import 'desktop_shortcuts_dialog.dart';
 
 class AppShell extends ConsumerStatefulWidget {
   const AppShell({
@@ -249,21 +250,54 @@ class _AppShellState extends ConsumerState<AppShell> {
           LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.keyF):
               const _NavigateIntent('/search'),
           LogicalKeySet(LogicalKeyboardKey.escape): const _BackIntent(),
-          LogicalKeySet(LogicalKeyboardKey.digit1): const _NavigateIntent('/'),
+          // Ctrl + 1..8
-          LogicalKeySet(LogicalKeyboardKey.digit2):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit1):
+              const _NavigateIntent('/'),
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit2):
               const _NavigateIntent('/search'),
-          LogicalKeySet(LogicalKeyboardKey.digit3):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit3):
               const _NavigateIntent('/favorites'),
-          LogicalKeySet(LogicalKeyboardKey.digit4):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit4):
               const _NavigateIntent('/viewed'),
-          LogicalKeySet(LogicalKeyboardKey.digit5):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit5):
               const _NavigateIntent('/collections'),
-          LogicalKeySet(LogicalKeyboardKey.digit6):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit6):
               const _NavigateIntent('/artists'),
-          LogicalKeySet(LogicalKeyboardKey.digit7):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit7):
               const _NavigateIntent('/providers'),
-          LogicalKeySet(LogicalKeyboardKey.digit8):
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.digit8):
               const _NavigateIntent('/settings'),
+          // Alt + 1..8
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit1):
+              const _NavigateIntent('/'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit2):
+              const _NavigateIntent('/search'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit3):
+              const _NavigateIntent('/favorites'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit4):
+              const _NavigateIntent('/viewed'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit5):
+              const _NavigateIntent('/collections'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit6):
+              const _NavigateIntent('/artists'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit7):
+              const _NavigateIntent('/providers'),
+          LogicalKeySet(LogicalKeyboardKey.alt, LogicalKeyboardKey.digit8):
+              const _NavigateIntent('/settings'),
+          // Tab cycling
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.tab):
+              const _CycleTabIntent(forward: true),
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.shift, LogicalKeyboardKey.tab):
+              const _CycleTabIntent(forward: false),
+          // Refresh
+          LogicalKeySet(LogicalKeyboardKey.control, LogicalKeyboardKey.keyR):
+              const _RefreshIntent(),
+          LogicalKeySet(LogicalKeyboardKey.f5): const _RefreshIntent(),
+          // Shortcuts help cheat sheet
+          LogicalKeySet(LogicalKeyboardKey.question): const _HelpIntent(),
+          LogicalKeySet(LogicalKeyboardKey.f1): const _HelpIntent(),
+          LogicalKeySet(LogicalKeyboardKey.shift, LogicalKeyboardKey.slash):
+              const _HelpIntent(),
         },
         child: Actions(
           actions: {
@@ -279,6 +313,33 @@ class _AppShellState extends ConsumerState<AppShell> {
                 return null;
               },
             ),
+            _CycleTabIntent: CallbackAction<_CycleTabIntent>(
+              onInvoke: (intent) {
+                if (destinations.isEmpty) return null;
+                final currentBranch = widget.navigationShell?.currentIndex ?? 0;
+                final currentIdx = destinations.indexWhere(
+                  (d) => AppShell.branchIndexForLocation(d.location) == currentBranch,
+                );
+                final safeIdx = currentIdx < 0 ? 0 : currentIdx;
+                final nextIdx = intent.forward
+                    ? ((safeIdx + 1) % destinations.length)
+                    : ((safeIdx - 1 + destinations.length) % destinations.length);
+                _onNavigate(destinations[nextIdx].location);
+                return null;
+              },
+            ),
+            _RefreshIntent: CallbackAction<_RefreshIntent>(
+              onInvoke: (_) {
+                ref.read(feedControllerProvider.notifier).refresh();
+                return null;
+              },
+            ),
+            _HelpIntent: CallbackAction<_HelpIntent>(
+              onInvoke: (_) {
+                DesktopShortcutsDialog.show(context);
+                return null;
+              },
+            ),
           },
           child: Focus(
             autofocus: true,
@@ -312,6 +373,7 @@ class _DesktopShell extends StatefulWidget {
     required this.onNavigate,
     this.currentBranchIndex,
   });
+
   final Widget child;
   final List<_Destination> destinations;
   final bool ru;
@@ -322,54 +384,416 @@ class _DesktopShell extends StatefulWidget {
   State<_DesktopShell> createState() => _DesktopShellState();
 }
 
-class _DesktopShellState extends State<_DesktopShell> {
+class _DesktopShellState extends State<_DesktopShell>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController _controller;
+  late final Animation<double> _animation;
   bool _hovered = false;
+  bool _pinned = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 220),
+    );
+    _animation = CurvedAnimation(
+      parent: _controller,
+      curve: Curves.easeOutCubic,
+      reverseCurve: Curves.easeInCubic,
+    );
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  void _handleHover(bool hovered) {
+    if (_hovered == hovered) return;
+    setState(() => _hovered = hovered);
+    if (_pinned) return;
+    if (hovered) {
+      _controller.forward();
+    } else {
+      _controller.reverse();
+    }
+  }
+
+  void _togglePinned() {
+    setState(() {
+      _pinned = !_pinned;
+      if (_pinned) {
+        _controller.forward();
+      } else if (!_hovered) {
+        _controller.reverse();
+      }
+    });
+  }
 
   @override
   Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
     final location = GoRouterState.of(context).uri.path;
     final activeBranch = widget.currentBranchIndex ??
         AppShell.branchIndexForLocation(location);
     final selected = widget.destinations.indexWhere(
       (item) => AppShell.branchIndexForLocation(item.location) == activeBranch,
     );
+
     return Scaffold(
       body: Row(
         children: [
           MouseRegion(
-            onEnter: (_) => setState(() => _hovered = true),
+            onEnter: (_) => _handleHover(true),
-            onExit: (_) => setState(() => _hovered = false),
+            onExit: (_) => _handleHover(false),
-            child: AnimatedContainer(
+            child: AnimatedBuilder(
-              duration: AppMotion.duration(context, 180),
+              animation: _animation,
-              curve: Curves.easeOutCubic,
+              builder: (context, _) {
-              width: _hovered ? 256 : 72,
+                final progress = _animation.value;
-              color: Theme.of(context).navigationRailTheme.backgroundColor,
+                final width = lerpDouble(74.0, 260.0, progress)!;
-              child: SafeArea(
+                final contentOpacity =
-                child: Padding(
+                    (progress - 0.25).clamp(0.0, 0.75) / 0.75;
-                  padding:
+                final isFullyExpanded = progress > 0.85;
-                      const EdgeInsets.symmetric(vertical: 12, horizontal: 8),
+
-                  child: Column(
+                return Container(
-                    children: [
+                  width: width,
-                      for (var index = 0;
+                  decoration: BoxDecoration(
-                          index < widget.destinations.length;
+                    color: isDark
-                          index++)
+                        ? scheme.surfaceContainerHigh
-                        _RailButton(
+                        : scheme.surface,
-                          destination: widget.destinations[index],
+                    border: Border(
-                          ru: widget.ru,
+                      right: BorderSide(
-                          selected: (selected < 0 ? 0 : selected) == index,
+                        color: isDark
-                          expanded: _hovered,
+                            ? Colors.white.withValues(alpha: 0.1)
-                          onTap: () {
+                            : scheme.outlineVariant.withValues(alpha: 0.35),
-                            widget.onNavigate(widget.destinations[index].location);
+                        width: 1,
-                          },
+                      ),
-                        ),
+                    ),
-                      const Spacer(),
+                    boxShadow: [
+                      BoxShadow(
+                        color:
+                            Colors.black.withValues(alpha: isDark ? 0.3 : 0.05),
+                        blurRadius: 16,
+                        offset: const Offset(3, 0),
+                      ),
                     ],
                   ),
-                ),
+                  child: ClipRect(
-              ),
+                    child: OverflowBox(
+                      minWidth: 260,
+                      maxWidth: 260,
+                      alignment: Alignment.topLeft,
+                      child: SizedBox(
+                        width: 260,
+                        child: SafeArea(
+                          child: Column(
+                            children: [
+                              // App Brand Header
+                              Padding(
+                                padding:
+                                    const EdgeInsets.fromLTRB(15, 16, 12, 14),
+                                child: SizedBox(
+                                  height: 44,
+                                  child: Row(
+                                    children: [
+                                      Container(
+                                        width: 44,
+                                        height: 44,
+                                        decoration: BoxDecoration(
+                                          gradient: LinearGradient(
+                                            begin: Alignment.topLeft,
+                                            end: Alignment.bottomRight,
+                                            colors: [
+                                              scheme.primary,
+                                              scheme.tertiary,
+                                            ],
+                                          ),
+                                          borderRadius:
+                                              BorderRadius.circular(14),
+                                          boxShadow: [
+                                            BoxShadow(
+                                              color: scheme.primary
+                                                  .withValues(alpha: 0.35),
+                                              blurRadius: 12,
+                                              offset: const Offset(0, 3),
+                                            ),
+                                          ],
+                                        ),
+                                        child: const Center(
+                                          child: Icon(
+                                            Icons.auto_awesome_rounded,
+                                            color: Colors.white,
+                                            size: 24,
+                                          ),
+                                        ),
+                                      ),
+                                      const SizedBox(width: 12),
+                                      Expanded(
+                                        child: Opacity(
+                                          opacity: contentOpacity,
+                                          child: Row(
+                                            children: [
+                                              Expanded(
+                                                child: Column(
+                                                  crossAxisAlignment:
+                                                      CrossAxisAlignment.start,
+                                                  mainAxisAlignment:
+                                                      MainAxisAlignment.center,
+                                                  children: [
+                                                    Text(
+                                                      'Lunaris',
+                                                      maxLines: 1,
+                                                      softWrap: false,
+                                                      style: theme
+                                                          .textTheme
+                                                          .titleMedium
+                                                          ?.copyWith(
+                                                        fontWeight:
+                                                            FontWeight.w800,
+                                                        letterSpacing: 0.2,
+                                                      ),
+                                                    ),
+                                                    const SizedBox(height: 2),
+                                                    Container(
+                                                      padding: const EdgeInsets
+                                                          .symmetric(
+                                                        horizontal: 6,
+                                                        vertical: 1.5,
+                                                      ),
+                                                      decoration: BoxDecoration(
+                                                        color: scheme.primary
+                                                            .withValues(
+                                                                alpha: 0.15),
+                                                        borderRadius:
+                                                            BorderRadius
+                                                                .circular(6),
+                                                        border: Border.all(
+                                                          color: scheme.primary
+                                                              .withValues(
+                                                                  alpha: 0.3),
+                                                          width: 0.8,
+                                                        ),
+                                                      ),
+                                                      child: Text(
+                                                        'v3.6.4',
+                                                        style: TextStyle(
+                                                          fontSize: 10,
+                                                          fontWeight:
+                                                              FontWeight.bold,
+                                                          color: scheme.primary,
+                                                          letterSpacing: 0.4,
+                                                        ),
+                                                      ),
+                                                    ),
+                                                  ],
+                                                ),
+                                              ),
+                                              IconButton(
+                                                visualDensity:
+                                                    VisualDensity.compact,
+                                                tooltip: _pinned
+                                                    ? (widget.ru
+                                                        ? 'Открепить панель'
+                                                        : 'Unpin panel')
+                                                    : (widget.ru
+                                                        ? 'Закрепить панель'
+                                                        : 'Pin panel'),
+                                                onPressed: _togglePinned,
+                                                icon: Icon(
+                                                  _pinned
+                                                      ? Icons.push_pin_rounded
+                                                      : Icons.push_pin_outlined,
+                                                  size: 19,
+                                                  color: _pinned
+                                                      ? scheme.primary
+                                                      : scheme
+                                                          .onSurfaceVariant,
+                                                ),
+                                              ),
+                                            ],
+                                          ),
+                                        ),
+                                      ),
+                                    ],
+                                  ),
+                                ),
+                              ),
+                              const Divider(height: 1),
+                              const SizedBox(height: 8),
+
+                              // Destinations List
+                              Expanded(
+                                child: ListView(
+                                  padding:
+                                      const EdgeInsets.symmetric(horizontal: 8),
+                                  children: [
+                                    for (var index = 0;
+                                        index < widget.destinations.length;
+                                        index++)
+                                      _RailButton(
+                                        destination: widget.destinations[index],
+                                        ru: widget.ru,
+                                        selected: (selected < 0 ? 0 : selected) ==
+                                            index,
+                                        contentOpacity: contentOpacity,
+                                        isFullyExpanded: isFullyExpanded,
+                                        shortcutKey: 'Ctrl+${index + 1}',
+                                        onTap: () {
+                                          widget.onNavigate(
+                                              widget.destinations[index]
+                                                  .location);
+                                        },
+                                      ),
+                                  ],
+                                ),
+                              ),
+
+                              // Bottom Actions
+                              const Divider(height: 1),
+                              Padding(
+                                padding: const EdgeInsets.symmetric(
+                                    horizontal: 8, vertical: 8),
+                                child: SizedBox(
+                                  width: 244,
+                                  child: Row(
+                                    children: [
+                                      Expanded(
+                                        child: Tooltip(
+                                          message: isFullyExpanded
+                                              ? ''
+                                              : (widget.ru
+                                                  ? 'Горячие клавиши (F1 / ?)'
+                                                  : 'Keyboard Shortcuts (F1 / ?)'),
+                                          waitDuration: const Duration(
+                                              milliseconds: 350),
+                                          child: Material(
+                                            color: Colors.transparent,
+                                            borderRadius:
+                                                BorderRadius.circular(14),
+                                            clipBehavior: Clip.antiAlias,
+                                            child: InkWell(
+                                              onTap: () =>
+                                                  DesktopShortcutsDialog.show(
+                                                      context),
+                                              child: SizedBox(
+                                                height: 44,
+                                                child: Row(
+                                                  children: [
+                                                    SizedBox(
+                                                      width: 58,
+                                                      child: Icon(
+                                                        Icons.keyboard_rounded,
+                                                        size: 22,
+                                                        color: scheme
+                                                            .onSurfaceVariant,
+                                                      ),
+                                                    ),
+                                                    Expanded(
+                                                      child: Opacity(
+                                                        opacity: contentOpacity,
+                                                        child: Row(
+                                                          children: [
+                                                            Expanded(
+                                                              child: Text(
+                                                                widget.ru
+                                                                    ? 'Горячие клавиши'
+                                                                    : 'Shortcuts',
+                                                                maxLines: 1,
+                                                                softWrap: false,
+                                                                overflow:
+                                                                    TextOverflow
+                                                                        .ellipsis,
+                                                                style:
+                                                                    TextStyle(
+                                                                  fontWeight:
+                                                                      FontWeight
+                                                                          .w600,
+                                                                  fontSize: 13,
+                                                                  color: scheme
+                                                                      .onSurface,
+                                                                ),
+                                                              ),
+                                                            ),
+                                                            Container(
+                                                              padding:
+                                                                  const EdgeInsets
+                                                                      .symmetric(
+                                                                horizontal: 6,
+                                                                vertical: 2,
+                                                              ),
+                                                              decoration:
+                                                                  BoxDecoration(
+                                                                color: isDark
+                                                                    ? Colors
+                                                                        .white
+                                                                        .withValues(
+                                                                            alpha:
+                                                                                0.1)
+                                                                    : Colors
+                                                                        .black
+                                                                        .withValues(
+                                                                            alpha:
+                                                                                0.06),
+                                                                borderRadius:
+                                                                    BorderRadius
+                                                                        .circular(
+                                                                            6),
+                                                              ),
+                                                              child: const Text(
+                                                                '?',
+                                                                style:
+                                                                    TextStyle(
+                                                                  fontSize: 11,
+                                                                  fontWeight:
+                                                                      FontWeight
+                                                                          .bold,
+                                                                  fontFamily:
+                                                                      'monospace',
+                                                                ),
+                                                              ),
+                                                            ),
+                                                            const SizedBox(
+                                                                width: 8),
+                                                          ],
+                                                        ),
+                                                      ),
+                                                    ),
+                                                  ],
+                                                ),
+                                              ),
+                                            ),
+                                          ),
+                                        ),
+                                      ),
+                                      if (!_pinned && progress < 0.4)
+                                        IconButton(
+                                          tooltip: widget.ru
+                                              ? 'Закрепить панель'
+                                              : 'Pin sidebar',
+                                          onPressed: _togglePinned,
+                                          icon: const Icon(
+                                              Icons.chevron_right_rounded,
+                                              size: 20),
+                                        ),
+                                    ],
+                                  ),
+                                ),
+                              ),
+                            ],
+                          ),
+                        ),
+                      ),
+                    ),
+                  ),
+                );
+              },
             ),
           ),
-          const VerticalDivider(width: 1),
           Expanded(child: widget.child),
         ],
       ),
@@ -381,75 +805,148 @@ class _RailButton extends StatelessWidget {
   const _RailButton({
     required this.destination,
     required this.selected,
-    required this.expanded,
+    required this.contentOpacity,
+    required this.isFullyExpanded,
     required this.ru,
+    required this.shortcutKey,
     required this.onTap,
   });
 
   final _Destination destination;
   final bool selected;
-  final bool expanded;
+  final double contentOpacity;
+  final bool isFullyExpanded;
   final bool ru;
+  final String shortcutKey;
   final VoidCallback onTap;
 
   @override
   Widget build(BuildContext context) {
-    final colors = Theme.of(context).colorScheme;
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
+    final label = destination.labelFor(ru);
+
     return Padding(
-      padding: const EdgeInsets.only(bottom: 8),
+      padding: const EdgeInsets.symmetric(vertical: 2),
       child: Tooltip(
-        message: expanded ? '' : destination.labelFor(ru),
+        message: isFullyExpanded ? '' : '$label ($shortcutKey)',
-        waitDuration: const Duration(milliseconds: 450),
+        waitDuration: const Duration(milliseconds: 350),
         child: Material(
-          color: selected ? colors.primaryContainer : Colors.transparent,
+          color: selected
-          borderRadius: BorderRadius.circular(28),
+              ? scheme.primary.withValues(alpha: isDark ? 0.22 : 0.12)
+              : Colors.transparent,
+          borderRadius: BorderRadius.circular(14),
           clipBehavior: Clip.antiAlias,
           child: InkWell(
             onTap: onTap,
             child: SizedBox(
-              height: 48,
+              width: 244,
-              child: Row(
+              height: 46,
-                children: [
+              child: DecoratedBox(
-                  SizedBox(
+                decoration: BoxDecoration(
-                    width: 56,
+                  borderRadius: BorderRadius.circular(14),
-                    child: Icon(
+                  border: selected
-                      destination.icon,
+                      ? Border.all(
-                      color: selected
+                          color: scheme.primary
-                          ? colors.onPrimaryContainer
+                              .withValues(alpha: isDark ? 0.45 : 0.28),
-                          : colors.onSurfaceVariant,
+                          width: 1.1,
+                        )
+                      : null,
+                ),
+                child: Row(
+                  children: [
+                    // Active left indicator bar
+                    Container(
+                      width: 3.5,
+                      height: 22,
+                      decoration: BoxDecoration(
+                        color: selected ? scheme.primary : Colors.transparent,
+                        borderRadius: BorderRadius.circular(2),
+                        boxShadow: selected
+                            ? [
+                                BoxShadow(
+                                  color: scheme.primary.withValues(alpha: 0.6),
+                                  blurRadius: 6,
+                                ),
+                              ]
+                            : null,
+                      ),
                     ),
-                  ),
+                    SizedBox(
-                  if (expanded)
+                      width: 54.5,
-                    Expanded(
+                      child: Center(
-                      child: ClipRect(
+                        child: Icon(
-                        child: AnimatedOpacity(
+                          destination.icon,
-                          opacity: 1,
+                          size: 22,
-                          duration: AppMotion.duration(context, 120),
+                          color: selected
-                          curve: Curves.easeOut,
+                              ? scheme.primary
-                          child: Align(
+                              : (isDark
-                            alignment: Alignment.centerLeft,
+                                  ? scheme.onSurfaceVariant
-                            child: Text(
+                                      .withValues(alpha: 0.85)
-                              destination.labelFor(ru),
+                                  : scheme.onSurfaceVariant),
-                              maxLines: 1,
-                              overflow: TextOverflow.clip,
-                              softWrap: false,
-                              style: TextStyle(
-                                fontWeight: selected
-                                    ? FontWeight.w700
-                                    : FontWeight.w600,
-                                color: selected
-                                    ? colors.onPrimaryContainer
-                                    : colors.onSurface,
-                              ),
-                            ),
-                          ),
                         ),
                       ),
-                    )
+                    ),
-                  else
+                    Expanded(
-                    const SizedBox.shrink(),
+                      child: Opacity(
-                  if (expanded) const SizedBox(width: 12),
+                        opacity: contentOpacity,
-                ],
+                        child: Row(
+                          children: [
+                            Expanded(
+                              child: Text(
+                                label,
+                                maxLines: 1,
+                                softWrap: false,
+                                overflow: TextOverflow.ellipsis,
+                                style: TextStyle(
+                                  fontSize: 13.5,
+                                  fontWeight: selected
+                                      ? FontWeight.w700
+                                      : FontWeight.w500,
+                                  color: selected
+                                      ? scheme.primary
+                                      : scheme.onSurface,
+                                ),
+                              ),
+                            ),
+                            Container(
+                              padding: const EdgeInsets.symmetric(
+                                horizontal: 5.5,
+                                vertical: 2,
+                              ),
+                              decoration: BoxDecoration(
+                                color: isDark
+                                    ? Colors.white.withValues(alpha: 0.08)
+                                    : Colors.black.withValues(alpha: 0.05),
+                                borderRadius: BorderRadius.circular(6),
+                                border: Border.all(
+                                  color: isDark
+                                      ? Colors.white.withValues(alpha: 0.12)
+                                      : Colors.black.withValues(alpha: 0.08),
+                                  width: 0.8,
+                                ),
+                              ),
+                              child: Text(
+                                shortcutKey,
+                                style: TextStyle(
+                                  fontSize: 10,
+                                  fontWeight: FontWeight.bold,
+                                  fontFamily: 'monospace',
+                                  color: selected
+                                      ? scheme.primary
+                                      : scheme.onSurfaceVariant
+                                          .withValues(alpha: 0.8),
+                                ),
+                              ),
+                            ),
+                            const SizedBox(width: 8),
+                          ],
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
               ),
             ),
           ),
@@ -945,3 +1442,16 @@ class _NavigateIntent extends Intent {
 class _BackIntent extends Intent {
   const _BackIntent();
 }
+
+class _CycleTabIntent extends Intent {
+  const _CycleTabIntent({required this.forward});
+  final bool forward;
+}
+
+class _RefreshIntent extends Intent {
+  const _RefreshIntent();
+}
+
+class _HelpIntent extends Intent {
+  const _HelpIntent();
+}

lib/shared/widgets/desktop_shortcuts_dialog.dart

@@ -0,0 +1,321 @@
+import 'dart:ui';
+import 'package:flutter/material.dart';
+
+class DesktopShortcutsDialog extends StatelessWidget {
+  const DesktopShortcutsDialog({super.key});
+
+  static Future<void> show(BuildContext context) {
+    return showDialog(
+      context: context,
+      barrierColor: Colors.black54,
+      builder: (_) => const DesktopShortcutsDialog(),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
+
+    return Dialog(
+      backgroundColor: Colors.transparent,
+      insetPadding: const EdgeInsets.symmetric(horizontal: 24, vertical: 32),
+      child: ConstrainedBox(
+        constraints: const BoxConstraints(maxWidth: 720, maxHeight: 680),
+        child: ClipRRect(
+          borderRadius: BorderRadius.circular(24),
+          child: BackdropFilter(
+            filter: ImageFilter.blur(sigmaX: 20, sigmaY: 20),
+            child: Container(
+              decoration: BoxDecoration(
+                color: isDark
+                    ? scheme.surfaceContainerHigh.withValues(alpha: 0.88)
+                    : Colors.white.withValues(alpha: 0.94),
+                borderRadius: BorderRadius.circular(24),
+                border: Border.all(
+                  color: isDark
+                      ? Colors.white.withValues(alpha: 0.16)
+                      : scheme.outlineVariant.withValues(alpha: 0.4),
+                  width: 1.2,
+                ),
+                boxShadow: [
+                  BoxShadow(
+                    color: Colors.black.withValues(alpha: isDark ? 0.45 : 0.12),
+                    blurRadius: 32,
+                    offset: const Offset(0, 12),
+                  ),
+                ],
+              ),
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                crossAxisAlignment: CrossAxisAlignment.stretch,
+                children: [
+                  // Header
+                  Padding(
+                    padding: const EdgeInsets.fromLTRB(24, 20, 16, 16),
+                    child: Row(
+                      children: [
+                        Container(
+                          padding: const EdgeInsets.all(10),
+                          decoration: BoxDecoration(
+                            color: scheme.primaryContainer.withValues(alpha: 0.7),
+                            borderRadius: BorderRadius.circular(14),
+                          ),
+                          child: Icon(
+                            Icons.keyboard_rounded,
+                            color: scheme.primary,
+                            size: 24,
+                          ),
+                        ),
+                        const SizedBox(width: 16),
+                        Expanded(
+                          child: Column(
+                            crossAxisAlignment: CrossAxisAlignment.start,
+                            children: [
+                              Text(
+                                'Горячие клавиши',
+                                style: theme.textTheme.titleLarge?.copyWith(
+                                  fontWeight: FontWeight.bold,
+                                ),
+                              ),
+                              const SizedBox(height: 2),
+                              Text(
+                                'Быстрое управление с клавиатуры для ПК',
+                                style: theme.textTheme.bodyMedium?.copyWith(
+                                  color: scheme.onSurfaceVariant,
+                                ),
+                              ),
+                            ],
+                          ),
+                        ),
+                        IconButton(
+                          onPressed: () => Navigator.of(context).pop(),
+                          icon: const Icon(Icons.close_rounded),
+                          tooltip: 'Закрыть (Esc)',
+                        ),
+                      ],
+                    ),
+                  ),
+                  const Divider(height: 1),
+
+                  // Shortcuts list
+                  Flexible(
+                    child: ListView(
+                      padding: const EdgeInsets.fromLTRB(24, 16, 24, 24),
+                      children: const [
+                        _ShortcutSection(
+                          icon: Icons.navigation_rounded,
+                          title: 'Общие и навигация',
+                          items: [
+                            _ShortcutRow(['Ctrl', '1…8'], 'Переключение между вкладками'),
+                            _ShortcutRow(['Ctrl', 'Tab'], 'Следующая вкладка'),
+                            _ShortcutRow(['Ctrl', 'Shift', 'Tab'], 'Предыдущая вкладка'),
+                            _ShortcutRow(['Ctrl', 'F'], 'Перейти к поиску / строка поиска'),
+                            _ShortcutRow(['Ctrl', 'R'], 'Обновить ленту / страницу'),
+                            _ShortcutRow(['F5'], 'Обновить страницу'),
+                            _ShortcutRow(['Esc'], 'Закрыть окно / назад / сбросить выбор'),
+                            _ShortcutRow(['?'], 'Открыть это окно горячих клавиш'),
+                          ],
+                        ),
+                        SizedBox(height: 20),
+                        _ShortcutSection(
+                          icon: Icons.smart_display_rounded,
+                          title: 'Видеоплеер',
+                          items: [
+                            _ShortcutRow(['Пробел'], 'Воспроизведение / Пауза'),
+                            _ShortcutRow(['←', '→'], 'Перемотка на 5 секунд назад / вперед'),
+                            _ShortcutRow(['Shift', '← / →'], 'Перемотка на 15 секунд'),
+                            _ShortcutRow(['↑', '↓'], 'Регулировка громкости (±5%)'),
+                            _ShortcutRow(['M'], 'Включить / выключить звук'),
+                            _ShortcutRow(['F'], 'Полноэкранный режим (Full Screen)'),
+                            _ShortcutRow(['L'], 'Повтор видео (Loop on/off)'),
+                            _ShortcutRow(['Esc'], 'Выйти из полноэкранного режима'),
+                          ],
+                        ),
+                        SizedBox(height: 20),
+                        _ShortcutSection(
+                          icon: Icons.photo_library_rounded,
+                          title: 'Фото и просмотр постов',
+                          items: [
+                            _ShortcutRow(['←', '→'], 'Предыдущее / следующее фото или пост'),
+                            _ShortcutRow(['+'], 'Увеличить масштаб (Zoom In)'),
+                            _ShortcutRow(['-'], 'Уменьшить масштаб (Zoom Out)'),
+                            _ShortcutRow(['0'], 'Сбросить масштаб (100%)'),
+                            _ShortcutRow(['F'], 'Подгонка по экрану / на весь экран'),
+                            _ShortcutRow(['D'], 'Скачать текущее изображение'),
+                            _ShortcutRow(['Ctrl', 'S'], 'Сохранить / Скачать файл'),
+                            _ShortcutRow(['Esc'], 'Сброс зума / назад'),
+                          ],
+                        ),
+                        SizedBox(height: 20),
+                        _ShortcutSection(
+                          icon: Icons.grid_view_rounded,
+                          title: 'Лента и посты',
+                          items: [
+                            _ShortcutRow(['R'], 'Открыть случайный пост'),
+                            _ShortcutRow(['V'], 'Включить/выключить режим выбора постов'),
+                          ],
+                        ),
+                      ],
+                    ),
+                  ),
+                ],
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _ShortcutSection extends StatelessWidget {
+  const _ShortcutSection({
+    required this.icon,
+    required this.title,
+    required this.items,
+  });
+
+  final IconData icon;
+  final String title;
+  final List<_ShortcutRow> items;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final isDark = theme.brightness == Brightness.dark;
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Row(
+          children: [
+            Icon(icon, size: 18, color: scheme.primary),
+            const SizedBox(width: 8),
+            Text(
+              title,
+              style: theme.textTheme.titleSmall?.copyWith(
+                fontWeight: FontWeight.bold,
+                color: scheme.primary,
+                letterSpacing: 0.3,
+              ),
+            ),
+          ],
+        ),
+        const SizedBox(height: 8),
+        Container(
+          decoration: BoxDecoration(
+            color: isDark
+                ? scheme.surface.withValues(alpha: 0.6)
+                : scheme.surfaceContainerHighest.withValues(alpha: 0.4),
+            borderRadius: BorderRadius.circular(16),
+            border: Border.all(
+              color: isDark
+                  ? Colors.white.withValues(alpha: 0.08)
+                  : Colors.black.withValues(alpha: 0.04),
+            ),
+          ),
+          child: Column(
+            children: [
+              for (var i = 0; i < items.length; i++) ...[
+                if (i > 0)
+                  Divider(
+                    height: 1,
+                    thickness: 1,
+                    color: isDark
+                        ? Colors.white.withValues(alpha: 0.05)
+                        : Colors.black.withValues(alpha: 0.04),
+                  ),
+                items[i],
+              ],
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+}
+
+class _ShortcutRow extends StatelessWidget {
+  const _ShortcutRow(this.keys, this.description);
+
+  final List<String> keys;
+  final String description;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
+      child: Row(
+        children: [
+          Expanded(
+            child: Text(
+              description,
+              style: theme.textTheme.bodyMedium?.copyWith(
+                color: scheme.onSurface,
+                fontWeight: FontWeight.w500,
+              ),
+            ),
+          ),
+          const SizedBox(width: 12),
+          Wrap(
+            spacing: 4,
+            runSpacing: 4,
+            children: keys.map((key) => _KeyCap(key)).toList(growable: false),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _KeyCap extends StatelessWidget {
+  const _KeyCap(this.text);
+
+  final String text;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final isDark = theme.brightness == Brightness.dark;
+    final scheme = theme.colorScheme;
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+      decoration: BoxDecoration(
+        color: isDark
+            ? scheme.surfaceContainerHighest.withValues(alpha: 0.9)
+            : Colors.white,
+        borderRadius: BorderRadius.circular(8),
+        border: Border.all(
+          color: isDark
+              ? Colors.white.withValues(alpha: 0.2)
+              : Colors.black.withValues(alpha: 0.15),
+          width: 1,
+        ),
+        boxShadow: [
+          BoxShadow(
+            color: Colors.black.withValues(alpha: isDark ? 0.4 : 0.08),
+            offset: const Offset(0, 1.5),
+            blurRadius: 1,
+          ),
+        ],
+      ),
+      child: Text(
+        text,
+        style: TextStyle(
+          fontFamily: 'monospace',
+          fontSize: 12,
+          fontWeight: FontWeight.bold,
+          color: scheme.onSurface,
+          letterSpacing: 0.2,
+        ),
+      ),
+    );
+  }
+}

lib/shared/widgets/post_card.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:collection';
+import 'dart:io';
 
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:flutter/material.dart';
@@ -232,7 +233,7 @@ class _PostCardState extends ConsumerState<PostCard>
                         }
                         final dpr = MediaQuery.devicePixelRatioOf(context);
                         final cacheWidth =
-                            (constraints.maxWidth * dpr).round().clamp(320, 1800);
+                            (constraints.maxWidth * dpr).round().clamp(280, 960);
                         final headers = _headersFor(post);
                         final videoUrls = MediaUrlSelector.video(post);
                         if (!mobile &&
@@ -590,7 +591,15 @@ class _FeedVideoPreviewState extends State<_FeedVideoPreview> {
     super.initState();
     MediaKit.ensureInitialized();
     _player = Player();
-    _controller = VideoController(_player);
+    final isDesktop =
+        Platform.isLinux || Platform.isWindows || Platform.isMacOS;
+    _controller = VideoController(
+      _player,
+      configuration: VideoControllerConfiguration(
+        enableHardwareAcceleration: !isDesktop,
+        hwdec: isDesktop ? 'no' : 'auto-safe',
+      ),
+    );
     _player.stream.error.listen((_) {
       if (mounted) setState(() => _failed = true);
     });
@@ -633,15 +642,13 @@ class _FeedVideoPreviewState extends State<_FeedVideoPreview> {
         AnimatedOpacity(
           opacity: _ready ? 1 : 0,
           duration: AppMotion.duration(context, 180),
-          child: ColoredBox(
+          child: Video(
-            color: Colors.black,
+            controller: _controller,
-            child: Video(
+            fit: BoxFit.cover,
-              controller: _controller,
+            fill: Colors.transparent,
-              fit: BoxFit.cover,
+            controls: null,
-              controls: null,
+            pauseUponEnteringBackgroundMode: false,
-              pauseUponEnteringBackgroundMode: false,
+            resumeUponEnteringForegroundMode: false,
-              resumeUponEnteringForegroundMode: false,
-            ),
           ),
         ),
       ],

lib/shared/widgets/post_masonry_grid.dart

@@ -68,24 +68,26 @@ class PostMasonryGrid extends StatelessWidget {
     final spacing = mobile ? 8.0 : 12.0;
 
     Widget buildCard(Post post) {
-      return PostCard(
+      return RepaintBoundary(
-        post: post,
+        child: PostCard(
-        blurExplicit: blurExplicit && !nsfwEnabled,
+          post: post,
-        showBadges: showBadges,
+          blurExplicit: blurExplicit && !nsfwEnabled,
-        isFavorite: favoriteKeys.contains(post.cacheKey),
+          showBadges: showBadges,
-        isViewed: viewedKeys.contains(post.cacheKey),
+          isFavorite: favoriteKeys.contains(post.cacheKey),
-        isDownloaded: downloadedKeys.contains(post.cacheKey),
+          isViewed: viewedKeys.contains(post.cacheKey),
-        mediaQualityMode: mediaQualityMode,
+          isDownloaded: downloadedKeys.contains(post.cacheKey),
-        onOpen: () => onOpen(post),
+          mediaQualityMode: mediaQualityMode,
-        onFavorite: () => onFavorite(post),
+          onOpen: () => onOpen(post),
-        onPreview: onPreview == null ? null : () => onPreview!(post),
+          onFavorite: () => onFavorite(post),
-        onHide: onHide == null ? null : () => onHide!(post),
+          onPreview: onPreview == null ? null : () => onPreview!(post),
-        selectionMode: selectionMode,
+          onHide: onHide == null ? null : () => onHide!(post),
-        selected: selectedKeys.contains(post.cacheKey),
+          selectionMode: selectionMode,
-        onToggleSelected:
+          selected: selectedKeys.contains(post.cacheKey),
-            onToggleSelected == null ? null : () => onToggleSelected!(post),
+          onToggleSelected:
-        onAddToCollection:
+              onToggleSelected == null ? null : () => onToggleSelected!(post),
-            onAddToCollection == null ? null : () => onAddToCollection!(post),
+          onAddToCollection:
+              onAddToCollection == null ? null : () => onAddToCollection!(post),
+        ),
       );
     }
 

pubspec.yaml

@@ -1,7 +1,7 @@
 name: gel_rule_app
 description: Local backend/core layer for a Flutter booru browser app.
 publish_to: "none"
-version: 3.5.5+81
+version: 3.6.4+86
 
 environment:
   sdk: ">=3.3.0 <4.0.0"