fix: preserve AND tag operator during search and suggestion draft completions (v2.0.10)

README.md

@@ -10,7 +10,7 @@
 </p>
 
 <p align="center">
-  <img src="https://img.shields.io/badge/Version-2.0.5-blueviolet?style=for-the-badge" alt="Version 2.0.5" />
+  <img src="https://img.shields.io/badge/Version-2.0.10-blueviolet?style=for-the-badge" alt="Version 2.0.10" />
   <img src="https://img.shields.io/badge/Flutter-3.47+-02569B?style=for-the-badge&logo=flutter&logoColor=white" alt="Flutter" />
   <img src="https://img.shields.io/badge/Platform-Android%20%7C%20Linux%20%7C%20Windows-brightgreen?style=for-the-badge" alt="Platforms" />
   <img src="https://img.shields.io/badge/Gitea-RarDog%2FLunaris-orange?style=for-the-badge&logo=gitea&logoColor=white" alt="Gitea" />
@@ -20,26 +20,33 @@
 
 ## ✨ Основные возможности
 
+- **⚡ Мгновенные подсказки тегов (0 мс) и постоянный файловый кэш**: Локальный JSON-кэш на телефоне и ПК обеспечивает мгновенный отклик при наборе, а Danbooru, Gelbooru, Moebooru и e621 динамически дополняют базу тегов.
+- **🎨 Цветные бейджи категорий и подсветка совпадений**: Выделение введенных букв жирным цветом акцента и четкая цветовая палитра категорий (художник — красный, персонаж — зеленый, копирайт — фиолетовый, вид — голубой).
+- **📚 Расширенная история поиска и гибкие настройки**: До 2000 записей истории и до 20000 закэшированных тегов с ручным управлением и кнопками очистки в Настройках.
+- **🎯 Общие модификаторы в мультипоиске**: При вводе `cat and dog anthro` модификатор `anthro` автоматически применится к обоим тегам (`cat anthro` + `dog anthro`).
+- **🔀 Раздельный мульти-поиск по тегам через `and`**: Оператор `and` опрашивает серверную базу по каждому тегу независимо и плавно чередует посты обоих тегов в общей ленте.
+- **🌐 Pawchive в главной ленте**: Глобальная лента недавних постов с Pawchive подключена прямо в общий Feed наравне с Rule34, Gelbooru, e621 и Realbooru.
+- **🏷️ Интерактивные теги автора**: Быстрая фильтрация по темам с живыми счётчиками постов (`#tag (count)`).
+- **📢 Анонсы и новости авторов**: Всплывающее окно анонсов автора с датами и текстом обращений к аудитории.
+- **⚡ Мгновенный фильтр фото, видео и GIF**: Локальная быстрая фильтрация постов автора без задержек.
 - **📱 Плавная лента в стиле Pinterest**: Masonry-сетка с переключением режима (Masonry, 1:1 Сетка, Список) в шапке ленты.
 - **⚡ Сверхбыстрые видео-превью**: Мгновенная загрузка превью без фризов и лишней нагрузки на процессор и память смартфона.
-- **↔️ Листание постов влево и вправо**: Полноэкранный пейджер с плавными свайпами между фото и видео во всех разделах (Лента, Авторы, Избранное, Коллекции, История просмотров).
+- **↔️ Листание постов влево и вправо**: Полноэкранный пейджер с плавными свайпами между фото и видео во всех разделах.
 - **❤️ Двойной тап для лайка и свайп вниз для закрытия**: Анимированное сердечко по двойному тапу и закрытие экрана просмотра свайпом вниз.
 - **📤 Прямая отправка файла (Share)**: Мгновенный экспорт оригинальных медиафайлов через системное меню «Поделиться».
-- **🔖 Сохраненные поисковые пресеты**: Быстрое сохранение комбинаций тегов и фильтров в закладки с мгновенным переключением в один клик.
+- **🔖 Сохраненные поисковые пресеты**: Быстрое сохранение комбинаций тегов и фильтров в закладки.
 - **📁 Умная структура папок скачивания**: Настраиваемые шаблоны поддиректорий (`{Artist}`, `{Provider}`, `{Service}`, `{ID}`, `{Date}`).
-- **🗑️ Менеджер кэша**: Детальная визуализация занятой памяти (база данных, ОЗУ, временные файлы) и выборочная очистка.
+- **🗑️ Менеджер кэша**: Детальная визуализация занятой памяти и выборочная очистка.
 - **📦 Бэкап и синхронизация**: Экспорт и импорт полной конфигурации в JSON-файл для переноса на другие устройства.
 - **🌑 AMOLED Pure Black тема**: Истинно черный фон (`#000000`) для экономии батареи на OLED дисплеях.
 - **🎨 Динамические цвета Material You**: Поддержка системной палитры Android из обоев устройства.
-- **⭐ Любимые авторы**: Компактная кнопка-звёздочка сверху справа для быстрого доступа ко всем любимым авторам и их свежему медиапотоку.
-- **🏷️ Мультивыбор платформ**: Быстрый выбор одной или нескольких платформ авторов (Patreon, Fanbox, Fantia, Boosty, Discord).
-- **🎬 Фильтр фото, видео и GIF у автора**: Удобные чипсы с мультивыбором типа контента и количеством найденных медиа.
-- **📜 Бесконечная подгрузка постов автора**: Умная пагинация при прокрутке вниз загружает всю историю работ без ограничений.
-- **🐾 Поддержка Pawchive**: Интеграция с `pawchive.pw` для просмотра профилей авторов, связанных аккаунтов, тегов и работ.
-- **🔍 Умный поиск и автодополнение**: Интерактивные чипсы тегов с подсказками от активных API. Быстрое исключение (`-tag`), добавление (`+tag`) или отправка в черный список по долгому тапу.
-- **🛡️ Продвинутый Blacklist / Whitelist**: Фильтрация по тегам, категориям, рейтингу контента (safe/questionable/explicit), провайдерам и минимальному score.
-- **🎬 Встроенный плеер**: Удобное воспроизведение WebM / MP4, запоминание настроек звука, fullscreen и повтор.
-- **💾 Менеджер загрузок и коллекции**: Скачивание оригиналов в высоком качестве, тематические папки-коллекции и автозагрузка избранного.
+- **⭐ Любимые авторы**: Компактная кнопка-звёздочка сверху справа для быстрого доступа ко всем любимым авторам.
+- **🏷️ Мультивыбор платформ**: Выбор нескольких платформ (Patreon, Fanbox, Fantia, Boosty, Discord).
+- **📜 Бесконечная подгрузка постов автора**: Умная пагинация при прокрутке вниз загружает всю историю работ.
+- **🔍 Умный поиск и автодополнение**: Интерактивные чипсы тегов с подсказками от активных API.
+- **🛡️ Продвинутый Blacklist / Whitelist**: Фильтрация по тегам, категориям, рейтингу контента и минимальному score.
+- **🎬 Встроенный плеер**: Удобное воспроизведение WebM / MP4, запоминание звука, fullscreen и повтор.
+- **💾 Менеджер загрузок и коллекции**: Скачивание оригиналов в высоком качестве и тематические папки-коллекции.
 - **🔄 Встроенное автообновление**: Проверка и скачивание свежих релизов напрямую из личного репозитория Gitea.
 
 ---
@@ -62,9 +69,9 @@
 
 🔗 **[Gitea Releases (RarDog/Lunaris)](https://gitea.rardogsynapse.online/RarDog/Lunaris/releases)**
 
-- **Android**: `Lunaris-v2.0.5.apk`
-- **Linux (x64)**: `Lunaris-v2.0.5-linux-x64.tar.gz`
-- **Windows**: `LunarisSetup-v2.0.5.exe` / `LunarisPortable-v2.0.5.zip`
+- **Android**: `Lunaris-v2.0.10.apk`
+- **Linux (x64)**: `Lunaris-v2.0.10-linux-x64.tar.gz`
+- **Windows**: `LunarisSetup-v2.0.10.exe` / `LunarisPortable-v2.0.10.zip`
 
 ---
 

lib/app/app_version.dart

@@ -1,3 +1,3 @@
-const appDisplayVersion = '2.0.5';
-const appBuildNumber = 27;
+const appDisplayVersion = '2.0.10';
+const appBuildNumber = 32;
 const appReleaseChannel = 'Stable';

lib/app/changelog.dart

@@ -1,4 +1,59 @@
 const lunarisChangelog = [
+  LunarisChange(
+    version: '2.0.10',
+    title: 'Fix "and" Tag Operator Retention, Suggestion Preceding Drafts & AND Chip Styling',
+    bullets: [
+      'Fixed "and" operator disappearing when submitting search or applying autocompletions.',
+      'Preserved preceding draft tokens (e.g. typing "cat and d" then picking "dog" now retains "cat", "AND", and "dog").',
+      'Supported multiple "and" separators without accidental deduplication.',
+      'Distinct visual styling for AND separator chips with secondary theme container and alt-route icon.',
+    ],
+  ),
+  LunarisChange(
+    version: '2.0.9',
+    title: 'Instant Tag Suggestions, Persistent Disk Cache, Expanded History & Match Highlighting',
+    bullets: [
+      'Instant 0ms tag suggestions: cached tags and search history are served immediately without network delay.',
+      'Persistent disk cache: tag suggestions are preserved in lunaris_tag_cache.json across app restarts on Android and PC.',
+      'Debounce reduced from 530ms to 100ms+160ms for ultra-responsive typing.',
+      'Match highlighting: matched characters are bolded and highlighted with the primary theme color in the dropdown.',
+      'Vibrant category badges: distinct colors for Artist (red), Character (green), Copyright (purple), Species (blue), and Meta (grey).',
+      'Danbooru tag autocomplete support connected (/tags/autocomplete.json).',
+      'Configurable search history limit (up to 2000 items) and tag cache limit (up to 20000 tags) in Settings.',
+      'Dedicated Clear Tag Cache actions in Settings and Cache Manager.',
+    ],
+  ),
+  LunarisChange(
+    version: '2.0.8',
+    title: 'Shared Context Modifiers for Multi-Tag Search & Clean Tag Filtering',
+    bullets: [
+      'Trailing context modifiers: typing "cat and dog anthro" automatically distributes "anthro" to all "and" branches (cat anthro + dog anthro).',
+      'Optional grouping parenthesis support: e.g. "(cat and dog) anthro".',
+      'Resolved "No posts yet" bug by adapting client post validation to multi-tag stream groups and stripping operator keywords from booru queries.',
+    ],
+  ),
+  LunarisChange(
+    version: '2.0.7',
+    title: 'Independent Multi-Tag Search Streams, Local "and" Connector, Pawchive in Main Feed & Reverts',
+    bullets: [
+      'Independent multi-tag search: separate tags query providers individually and interleave results so each tag brings its own content without mutual exclusion.',
+      'Local "and" tag connector: typing "and" between tags groups them into a strict intersection query (e.g. "genshin and raiden").',
+      'Enabled Pawchive in the main feed alongside Rule34, Gelbooru, e621, and Realbooru.',
+      'Restored instantaneous client-side media type filtering in artist posts.',
+      'Removed external linked accounts bar from artist posts screen.',
+    ],
+  ),
+  LunarisChange(
+    version: '2.0.6',
+    title: 'Pawchive Deep Integration: Global Posts Feed, Artist Tags, Announcements, Links & Server Media Filter',
+    bullets: [
+      'Connected Pawchive global recent posts (/api/v1/posts) to the main Feed screen with search.',
+      'Interactive artist tags bar (/tags) with live post counts (#tag (N)) and instant topic filtering.',
+      'Linked accounts bar (/links) with direct navigation to author profiles across platforms.',
+      'Artist announcements modal (/announcements) showing creator news, dates and status updates.',
+      'Server-side media filtering (Photos, Videos, GIFs) querying the entire author archive through the API.',
+    ],
+  ),
   LunarisChange(
     version: '2.0.5',
     title: '10 QoL Super-Update: AMOLED, Dynamic Colors, Grid switch, Share, Presets, Cache & Backup',

lib/backend/backend.dart

@@ -4,6 +4,9 @@ export 'models/content_provider_config.dart';
 export 'models/app_update_info.dart';
 export 'models/artist_profile.dart';
 export 'models/artist_work_query.dart';
+export 'models/artist_tag.dart';
+export 'models/artist_link.dart';
+export 'models/artist_announcement.dart';
 export 'models/download_task.dart';
 export 'models/downloaded_media.dart';
 export 'models/favorite.dart';
@@ -25,6 +28,7 @@ export 'services/favorite_service.dart';
 export 'services/feed_service.dart';
 export 'services/provider_check_service.dart';
 export 'services/search_service.dart';
+export 'services/tag_cache_service.dart';
 export 'services/settings_service.dart';
 export 'services/update_service.dart';
 export 'services/viewed_history_service.dart';

lib/backend/di/backend_providers.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:dio/dio.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -28,6 +30,7 @@ import '../services/favorite_service.dart';
 import '../services/feed_service.dart';
 import '../services/provider_check_service.dart';
 import '../services/search_service.dart';
+import '../services/tag_cache_service.dart';
 import '../services/settings_service.dart';
 import '../services/update_service.dart';
 import '../services/viewed_history_service.dart';
@@ -125,10 +128,17 @@ final viewedKeysProvider = FutureProvider<Set<String>>((ref) async {
   return result is Success<Set<String>> ? result.data : <String>{};
 });
 
+final tagCacheServiceProvider = Provider<TagCacheService>((ref) {
+  final service = TagCacheService();
+  unawaited(service.init());
+  return service;
+});
+
 final searchServiceProvider = Provider<SearchService>((ref) {
   return SearchService(
     ref.watch(searchRepositoryProvider),
     ref.watch(providerManagerProvider),
+    ref.watch(tagCacheServiceProvider),
   );
 });
 

lib/backend/models/artist_announcement.dart

@@ -0,0 +1,35 @@
+class ArtistAnnouncement {
+  const ArtistAnnouncement({
+    required this.service,
+    required this.userId,
+    required this.content,
+    this.hash,
+    this.added,
+  });
+
+  final String service;
+  final String userId;
+  final String content;
+  final String? hash;
+  final DateTime? added;
+
+  factory ArtistAnnouncement.fromJson(Map<String, dynamic> json) {
+    return ArtistAnnouncement(
+      service: (json['service'] ?? '').toString(),
+      userId: (json['user_id'] ?? '').toString(),
+      content: (json['content'] ?? '').toString(),
+      hash: json['hash']?.toString(),
+      added: json['added'] != null
+          ? DateTime.tryParse(json['added'].toString())
+          : null,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'service': service,
+        'user_id': userId,
+        'content': content,
+        if (hash != null) 'hash': hash,
+        if (added != null) 'added': added?.toIso8601String(),
+      };
+}

lib/backend/models/artist_link.dart

@@ -0,0 +1,39 @@
+class ArtistLink {
+  const ArtistLink({
+    required this.id,
+    required this.service,
+    required this.name,
+    this.publicId,
+    this.indexed,
+    this.updated,
+  });
+
+  final String id;
+  final String service;
+  final String name;
+  final String? publicId;
+  final DateTime? indexed;
+  final DateTime? updated;
+
+  factory ArtistLink.fromJson(Map<String, dynamic> json) {
+    return ArtistLink(
+      id: (json['id'] ?? '').toString(),
+      service: (json['service'] ?? '').toString(),
+      name: (json['name'] ?? '').toString(),
+      publicId: json['public_id']?.toString(),
+      indexed: json['indexed'] != null
+          ? DateTime.tryParse(json['indexed'].toString())
+          : null,
+      updated: json['updated'] != null
+          ? DateTime.tryParse(json['updated'].toString())
+          : null,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'service': service,
+        'name': name,
+        if (publicId != null) 'public_id': publicId,
+      };
+}

lib/backend/models/artist_tag.dart

@@ -0,0 +1,21 @@
+class ArtistTag {
+  const ArtistTag({
+    required this.tag,
+    required this.postCount,
+  });
+
+  final String tag;
+  final int postCount;
+
+  factory ArtistTag.fromJson(Map<String, dynamic> json) {
+    return ArtistTag(
+      tag: (json['tag'] ?? '').toString(),
+      postCount: (json['post_count'] as num?)?.toInt() ?? 0,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'tag': tag,
+        'post_count': postCount,
+      };
+}

lib/backend/models/artist_work_query.dart

@@ -4,12 +4,34 @@ class ArtistWorkQuery {
     required this.service,
     required this.artistId,
     required this.artistName,
+    this.queryText,
+    this.tagFilter,
   });
 
   final String providerId;
   final String service;
   final String artistId;
   final String artistName;
+  final String? queryText;
+  final String? tagFilter;
+
+  ArtistWorkQuery copyWith({
+    String? providerId,
+    String? service,
+    String? artistId,
+    String? artistName,
+    String? queryText,
+    String? tagFilter,
+  }) {
+    return ArtistWorkQuery(
+      providerId: providerId ?? this.providerId,
+      service: service ?? this.service,
+      artistId: artistId ?? this.artistId,
+      artistName: artistName ?? this.artistName,
+      queryText: queryText ?? this.queryText,
+      tagFilter: tagFilter ?? this.tagFilter,
+    );
+  }
 
   @override
   bool operator ==(Object other) {
@@ -17,9 +39,18 @@ class ArtistWorkQuery {
         other.providerId == providerId &&
         other.service == service &&
         other.artistId == artistId &&
-        other.artistName == artistName;
+        other.artistName == artistName &&
+        other.queryText == queryText &&
+        other.tagFilter == tagFilter;
   }
 
   @override
-  int get hashCode => Object.hash(providerId, service, artistId, artistName);
+  int get hashCode => Object.hash(
+        providerId,
+        service,
+        artistId,
+        artistName,
+        queryText,
+        tagFilter,
+      );
 }

lib/backend/models/tag_suggestion.dart

@@ -22,6 +22,30 @@ class TagSuggestion {
   final String providerId;
 
   String get categoryLabel => category.name;
+
+  Map<String, dynamic> toJson() => {
+        'name': name,
+        'category': category.name,
+        'postCount': postCount,
+        'providerId': providerId,
+      };
+
+  factory TagSuggestion.fromJson(Map<String, dynamic> json) => TagSuggestion(
+        name: (json['name'] ?? '').toString(),
+        category: tagCategoryFromString((json['category'] ?? '').toString()),
+        postCount: (json['postCount'] as num?)?.toInt() ?? 0,
+        providerId: (json['providerId'] ?? '').toString(),
+      );
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is TagSuggestion &&
+          runtimeType == other.runtimeType &&
+          name.toLowerCase() == other.name.toLowerCase();
+
+  @override
+  int get hashCode => name.toLowerCase().hashCode;
 }
 
 TagCategory tagCategoryFromString(String? value) {

lib/backend/providers/content_provider.dart

@@ -1,10 +1,13 @@
+import '../models/artist_announcement.dart';
+import '../models/artist_link.dart';
+import '../models/artist_profile.dart';
+import '../models/artist_tag.dart';
+import '../models/artist_work_query.dart';
 import '../models/post.dart';
 import '../models/post_comment.dart';
 import '../models/provider_health.dart';
 import '../models/tag_suggestion.dart';
 import '../models/top_period_filter.dart';
-import '../models/artist_profile.dart';
-import '../models/artist_work_query.dart';
 
 abstract class ContentProvider {
   String get id;
@@ -72,4 +75,15 @@ abstract class ArtistProvider {
     String artistId,
     String postId,
   );
+
+  Future<List<ArtistTag>> getArtistTags(String service, String artistId) async =>
+      const [];
+
+  Future<List<ArtistLink>> getArtistLinks(
+          String service, String artistId) async =>
+      const [];
+
+  Future<List<ArtistAnnouncement>> getArtistAnnouncements(
+          String service, String artistId) async =>
+      const [];
 }

lib/backend/providers/danbooru_provider.dart

@@ -5,11 +5,16 @@ import '../mappers/danbooru_mapper.dart';
 import '../models/post.dart';
 import '../models/post_comment.dart';
 import '../models/provider_health.dart';
+import '../models/tag_suggestion.dart';
 import '../models/top_period_filter.dart';
 import 'content_provider.dart';
 
 class DanbooruProvider
-    implements ContentProvider, CommentProvider, PostPageProvider {
+    implements
+        ContentProvider,
+        CommentProvider,
+        PostPageProvider,
+        TagSuggestionProvider {
   DanbooruProvider({
     required this.id,
     required this.name,
@@ -171,4 +176,49 @@ class DanbooruProvider
         '${value.month.toString().padLeft(2, '0')}-'
         '${value.day.toString().padLeft(2, '0')}';
   }
+
+  @override
+  Future<List<TagSuggestion>> suggestTags(
+    String query, {
+    int limit = 20,
+  }) async {
+    final cleanQuery = query
+        .replaceAll(RegExp(r'^[\(\)]+|[\(\)]+$'), '')
+        .trim()
+        .toLowerCase();
+    if (cleanQuery.isEmpty) return const [];
+    try {
+      final response = await _dio.get<dynamic>(
+        '/tags/autocomplete.json',
+        queryParameters: {
+          'search[name_matches]': cleanQuery,
+          'limit': limit.clamp(1, 50),
+          ..._queryParameters,
+        },
+      );
+      final items = response.data is List ? response.data as List : const [];
+      return items
+          .whereType<Map>()
+          .map((item) {
+            final json = Map<String, dynamic>.from(item);
+            final name = (json['value'] ?? json['name'] ?? '').toString();
+            return TagSuggestion(
+              name: name,
+              category: tagCategoryFromString(json['category']?.toString()),
+              postCount: _int(json['post_count']),
+              providerId: id,
+            );
+          })
+          .where((tag) => tag.name.isNotEmpty)
+          .toList(growable: false);
+    } catch (_) {
+      return const [];
+    }
+  }
+
+  int _int(dynamic value) {
+    if (value is int) return value;
+    if (value is num) return value.toInt();
+    return int.tryParse(value?.toString() ?? '') ?? 0;
+  }
 }

lib/backend/providers/kemono_provider.dart

@@ -1,7 +1,10 @@
 import 'package:dio/dio.dart';
 
 import '../../core/http/dio_client.dart';
+import '../models/artist_announcement.dart';
+import '../models/artist_link.dart';
 import '../models/artist_profile.dart';
+import '../models/artist_tag.dart';
 import '../models/artist_work_query.dart';
 import '../models/post.dart';
 import '../models/post_comment.dart';
@@ -214,6 +217,21 @@ class KemonoProvider
     return getArtistPostComments(parts[0], parts[1], parts[2]);
   }
 
+  @override
+  Future<List<ArtistTag>> getArtistTags(
+          String service, String artistId) async =>
+      const [];
+
+  @override
+  Future<List<ArtistLink>> getArtistLinks(
+          String service, String artistId) async =>
+      const [];
+
+  @override
+  Future<List<ArtistAnnouncement>> getArtistAnnouncements(
+          String service, String artistId) async =>
+      const [];
+
   String _creatorPath() => _isCoomer ? '/coomer' : '/kemono';
 
   List<ArtistProfile> _artistsFromResponse(dynamic data) {

lib/backend/providers/pawchive_provider.dart

@@ -3,7 +3,10 @@ import 'dart:async';
 import 'package:dio/dio.dart';
 
 import '../../core/http/dio_client.dart';
+import '../models/artist_announcement.dart';
+import '../models/artist_link.dart';
 import '../models/artist_profile.dart';
+import '../models/artist_tag.dart';
 import '../models/artist_work_query.dart';
 import '../models/post.dart';
 import '../models/post_comment.dart';
@@ -42,8 +45,35 @@ class PawchiveProvider
     String? rating,
     TopPeriodFilter topPeriod = TopPeriodFilter.none,
   }) async {
+    final offset = (page - 1).clamp(0, 999999) * 50;
+    final queryText = tags.join(' ').trim();
+    try {
+      final response = await _dio.get<dynamic>(
+        '/api/v1/posts',
+        queryParameters: {
+          if (queryText.isNotEmpty) 'q': queryText,
+          'o': offset,
+        },
+      );
+      final posts = _postItems(response.data);
+      final mapped = <Post>[];
+      for (final post in posts.whereType<Map>()) {
+        final json = Map<String, dynamic>.from(post);
+        final service = (json['service'] ?? 'fanbox').toString();
+        final userId = (json['user'] ?? '').toString();
+        final dummyQuery = ArtistWorkQuery(
+          providerId: id,
+          service: service,
+          artistId: userId,
+          artistName: userId,
+        );
+        mapped.addAll(_postsFromArtistPost(json, query: dummyQuery));
+      }
+      return mapped;
+    } catch (_) {
       return const [];
     }
+  }
 
   @override
   Future<Post?> getPost(String id) async {
@@ -178,7 +208,13 @@ class PawchiveProvider
     try {
       final response = await _dio.get<dynamic>(
         path,
-        queryParameters: {'o': offset},
+        queryParameters: {
+          'o': offset,
+          if (query.tagFilter != null && query.tagFilter!.isNotEmpty)
+            'tag': query.tagFilter,
+          if (query.queryText != null && query.queryText!.isNotEmpty)
+            'q': query.queryText,
+        },
       );
       final posts = _postItems(response.data);
       final mapped = <Post>[];
@@ -216,6 +252,72 @@ class PawchiveProvider
     }
   }
 
+  @override
+  Future<List<ArtistTag>> getArtistTags(String service, String artistId) async {
+    try {
+      final response = await _dio.get<dynamic>(
+        '/api/v1/$service/user/$artistId/tags',
+        options: Options(
+          receiveTimeout: const Duration(seconds: 15),
+          sendTimeout: const Duration(seconds: 10),
+        ),
+      );
+      final items = response.data;
+      if (items is List) {
+        return items
+            .whereType<Map>()
+            .map((item) => ArtistTag.fromJson(Map<String, dynamic>.from(item)))
+            .toList(growable: false);
+      }
+    } catch (_) {}
+    return const [];
+  }
+
+  @override
+  Future<List<ArtistLink>> getArtistLinks(
+      String service, String artistId) async {
+    try {
+      final response = await _dio.get<dynamic>(
+        '/api/v1/$service/user/$artistId/links',
+        options: Options(
+          receiveTimeout: const Duration(seconds: 15),
+          sendTimeout: const Duration(seconds: 10),
+        ),
+      );
+      final items = response.data;
+      if (items is List) {
+        return items
+            .whereType<Map>()
+            .map((item) => ArtistLink.fromJson(Map<String, dynamic>.from(item)))
+            .toList(growable: false);
+      }
+    } catch (_) {}
+    return const [];
+  }
+
+  @override
+  Future<List<ArtistAnnouncement>> getArtistAnnouncements(
+      String service, String artistId) async {
+    try {
+      final response = await _dio.get<dynamic>(
+        '/api/v1/$service/user/$artistId/announcements',
+        options: Options(
+          receiveTimeout: const Duration(seconds: 15),
+          sendTimeout: const Duration(seconds: 10),
+        ),
+      );
+      final items = response.data;
+      if (items is List) {
+        return items
+            .whereType<Map>()
+            .map((item) =>
+                ArtistAnnouncement.fromJson(Map<String, dynamic>.from(item)))
+            .toList(growable: false);
+      }
+    } catch (_) {}
+    return const [];
+  }
+
   @override
   Future<List<PostComment>> getComments(String postId) async {
     final parts = postId.split(':');

lib/backend/providers/provider_manager.dart

@@ -163,6 +163,68 @@ class ProviderManager {
     return Success(results);
   }
 
+  static List<List<String>> splitTagGroups(List<String> rawTags) {
+    final segments = <List<String>>[];
+    List<String> current = [];
+
+    for (final raw in rawTags) {
+      var token = raw.trim();
+      token = token.replaceAll(RegExp(r'^[\(\)]+|[\(\)]+$'), '').trim();
+      if (token.isEmpty) continue;
+
+      if (token.toLowerCase() == 'and') {
+        if (current.isNotEmpty) {
+          segments.add(current);
+          current = [];
+        }
+      } else {
+        current.add(token);
+      }
+    }
+
+    if (current.isNotEmpty) {
+      segments.add(current);
+    }
+
+    if (segments.isEmpty) {
+      return [const []];
+    }
+
+    if (segments.length == 1) {
+      return segments;
+    }
+
+    // Multiple segments separated by 'and'
+    // If the last segment has trailing tags after the branch tag (e.g. 'cat and dog anthro'):
+    // The trailing tags apply as common modifier tags to ALL branches!
+    final lastSegment = segments.last;
+    final prevSegment = segments[segments.length - 2];
+    final branchLen = prevSegment.length.clamp(1, lastSegment.length);
+
+    if (lastSegment.length > branchLen) {
+      final commonTail = lastSegment.sublist(branchLen);
+      final adjustedSegments = <List<String>>[];
+
+      for (int i = 0; i < segments.length; i++) {
+        final seg = i == segments.length - 1
+            ? lastSegment
+            : [...segments[i], ...commonTail];
+
+        final seen = <String>{};
+        final deduped = <String>[];
+        for (final t in seg) {
+          if (seen.add(t.toLowerCase())) {
+            deduped.add(t);
+          }
+        }
+        adjustedSegments.add(deduped);
+      }
+      return adjustedSegments;
+    }
+
+    return segments;
+  }
+
   Future<Result<List<Post>>> searchAcrossProviders({
     required List<String> tags,
     required int page,
@@ -181,12 +243,68 @@ class ProviderManager {
           providers.where((provider) => provider.id == providerId).toList();
     }
 
+    final tagGroups = splitTagGroups(tags);
+
+    if (tagGroups.length <= 1) {
+      final effectiveTags = tagGroups.isEmpty ? tags : tagGroups.first;
+      return _searchForTagGroup(
+        providers: providers,
+        tags: effectiveTags,
+        page: page,
+        limit: limit,
+        rating: rating,
+        providerId: providerId,
+        topPeriod: topPeriod,
+      );
+    }
+
+    // Multiple independent tag groups: query each tag group as if other tags are not present, then interleave
+    final seen = <String>{};
+    final groupPerLimit = (limit / tagGroups.length).ceil().clamp(10, 50);
+    final groupFutures = tagGroups.map((groupTags) {
+      return _searchForTagGroup(
+        providers: providers,
+        tags: groupTags,
+        page: page,
+        limit: groupPerLimit,
+        rating: rating,
+        providerId: providerId,
+        topPeriod: topPeriod,
+      );
+    }).toList(growable: false);
+
+    final results = await Future.wait(groupFutures);
+    final validGroupPosts = <List<Post>>[];
+    for (final res in results) {
+      if (res is Success<List<Post>>) {
+        validGroupPosts.add(res.data);
+      }
+    }
+
+    final interleaved = _interleaveTagGroupResults(validGroupPosts, seen);
+    return Success(interleaved);
+  }
+
+  Future<Result<List<Post>>> _searchForTagGroup({
+    required List<ContentProvider> providers,
+    required List<String> tags,
+    required int page,
+    required int limit,
+    required String? rating,
+    required String? providerId,
+    required TopPeriodFilter topPeriod,
+  }) async {
+    final cleanTags = tags
+        .map((t) => t.trim())
+        .where((t) => t.isNotEmpty && t.toLowerCase() != 'and')
+        .toList(growable: false);
+
     final seen = <String>{};
     final providerResults = <List<Post>>[];
     for (final provider in providers) {
       try {
         final providerPosts = await provider.searchPosts(
-          tags: tags,
+          tags: cleanTags,
           page: page,
           limit: limit,
           rating: rating,
@@ -234,6 +352,29 @@ class ProviderManager {
     return Success(posts);
   }
 
+  List<Post> _interleaveTagGroupResults(
+      List<List<Post>> groupResults, Set<String> seen) {
+    final combined = <Post>[];
+    var hasMore = true;
+    var index = 0;
+
+    while (hasMore) {
+      hasMore = false;
+      for (final group in groupResults) {
+        if (index < group.length) {
+          hasMore = true;
+          final post = group[index];
+          if (seen.add(post.cacheKey)) {
+            combined.add(post);
+          }
+        }
+      }
+      index++;
+    }
+
+    return combined;
+  }
+
   List<Post> _flattenProviderResults(
       List<List<Post>> results, Set<String> seen) {
     final posts = <Post>[];
@@ -584,7 +725,8 @@ class ProviderManager {
   }
 
   static bool _isFeedConfig(ContentProviderConfig config) {
-    return !_isArtistConfig(config);
+    final type = config.apiType.toLowerCase();
+    return type != 'kemono' && type != 'coomer';
   }
 
   static bool _isLegacyRemovedConfig(ContentProviderConfig config) {

lib/backend/repositories/search_repository.dart

@@ -10,7 +10,7 @@ class SearchRepository {
 
   final DatabaseService _databaseService;
 
-  Future<Result<void>> save(SearchHistory history) {
+  Future<Result<void>> save(SearchHistory history, {int maxItems = 500}) {
     return _databaseService.safeWrite((isar) async {
       await isar.searchHistoryEntitys.put(
         SearchHistoryEntity()
@@ -20,6 +20,21 @@ class SearchRepository {
           ..searchedAt = history.searchedAt
           ..resultCount = history.resultCount,
       );
+      final count = await isar.searchHistoryEntitys.count();
+      if (count > maxItems) {
+        final items = await isar.searchHistoryEntitys.where().findAll();
+        items.sort((a, b) => b.searchedAt.compareTo(a.searchedAt));
+        final toRemove = items.skip(maxItems);
+        for (final item in toRemove) {
+          await isar.searchHistoryEntitys.delete(item.isarId);
+        }
+      }
+    });
+  }
+
+  Future<Result<int>> count() {
+    return _databaseService.safeRead((isar) async {
+      return await isar.searchHistoryEntitys.count();
     });
   }
 

lib/backend/services/feed_service.dart

@@ -112,13 +112,21 @@ class FeedService {
 }
 
 bool postMatchesRequestedTags(Post post, List<String> requestedTags) {
-  final requested = requestedTags
-      .map((tag) => tag.trim().toLowerCase())
-      .where((tag) => tag.isNotEmpty && !tag.startsWith('-'))
-      .toList(growable: false);
-  if (requested.isEmpty) return true;
+  if (post.providerId == 'pawchive') return true;
+
+  final groups = ProviderManager.splitTagGroups(requestedTags);
+  if (groups.isEmpty) return true;
+
   final postTags = _postTagSet(post);
-  return requested.every(
+  if (postTags.isEmpty) return true;
+
+  return groups.any((group) {
+    final cleanGroup = group
+        .map((tag) => tag.trim().toLowerCase())
+        .where((tag) => tag.isNotEmpty && !tag.startsWith('-') && tag != 'and')
+        .toList(growable: false);
+    if (cleanGroup.isEmpty) return true;
+    return cleanGroup.every(
       (requestedTag) => postTags.any(
         (postTag) =>
             postTag == requestedTag ||
@@ -126,6 +134,7 @@ bool postMatchesRequestedTags(Post post, List<String> requestedTags) {
             postTag.startsWith('$requestedTag-'),
       ),
     );
+  });
 }
 
 bool postPassesTagFilters(Post post, AppSettings settings) {

lib/backend/services/search_service.dart

@@ -1,43 +1,101 @@
+import 'dart:async';
+
 import '../../core/utils/result.dart';
 import '../models/search_history.dart';
 import '../models/tag_suggestion.dart';
 import '../providers/provider_manager.dart';
 import '../repositories/search_repository.dart';
+import 'tag_cache_service.dart';
 
 class SearchService {
-  SearchService(this._repository, [this._providerManager]);
+  SearchService(
+    this._repository, [
+    this._providerManager,
+    this._tagCacheService,
+  ]);
 
   final SearchRepository _repository;
   final ProviderManager? _providerManager;
+  final TagCacheService? _tagCacheService;
 
-  List<String> parseTags(String query) {
-    return query
+  TagCacheService? get tagCacheService => _tagCacheService;
+
+  static String sanitizeToken(String raw) {
+    return raw
+        .replaceAll(RegExp(r'^[\(\)]+|[\(\)]+$'), '')
         .trim()
-        .split(RegExp(r'\s+'))
-        .where((tag) => tag.isNotEmpty)
-        .toSet()
-        .toList();
+        .toLowerCase();
   }
 
-  Future<Result<void>> saveSearch(String query, int resultCount) {
+  List<String> parseTags(String query) {
+    final seen = <String>{};
+    final result = <String>[];
+    for (final raw in query.trim().split(RegExp(r'\s+'))) {
+      final tag = raw.trim();
+      if (tag.isEmpty) continue;
+      if (tag.toLowerCase() != 'and' && !seen.add(tag.toLowerCase())) continue;
+      result.add(tag);
+    }
+    return result;
+  }
+
+  Future<Result<void>> saveSearch(
+    String query,
+    int resultCount, {
+    int maxHistory = 500,
+  }) async {
     final tags = parseTags(query);
-    return _repository.save(
-      SearchHistory(
+    final history = SearchHistory(
       id: '${DateTime.now().microsecondsSinceEpoch}:${tags.join(',')}',
       query: query.trim(),
       tags: tags,
       searchedAt: DateTime.now(),
       resultCount: resultCount,
+    );
+
+    // Also register user-searched tags in persistent tag cache
+    if (_tagCacheService != null && tags.isNotEmpty) {
+      unawaited(
+        _tagCacheService.cacheTags(
+          tags.map(
+            (tag) => TagSuggestion(
+              name: tag,
+              category: TagCategory.general,
+              postCount: resultCount,
+              providerId: 'history',
+            ),
+          ),
         ),
       );
     }
 
+    return _repository.save(history, maxItems: maxHistory);
+  }
+
   Future<Result<List<SearchHistory>>> recentSearches({int? limit}) {
     return _repository.recent(limit: limit);
   }
 
-  Future<Result<List<String>>> autocomplete(String prefix,
-      {int limit = 10}) async {
+  /// Instant local tag suggestions (0 ms) from disk cache & recent search history.
+  List<TagSuggestion> instantSuggestions(
+    String prefix, {
+    int limit = 16,
+    Iterable<String>? priorityTags,
+  }) {
+    final clean = sanitizeToken(prefix);
+    if (clean.isEmpty || clean == 'and') return const [];
+    return _tagCacheService?.findLocal(
+          clean,
+          limit: limit,
+          priorityTags: priorityTags,
+        ) ??
+        const [];
+  }
+
+  Future<Result<List<String>>> autocomplete(
+    String prefix, {
+    int limit = 10,
+  }) async {
     final result = await autocompleteDetailed(prefix, limit: limit);
     return result.fold(
       onSuccess: (items) => Success(items.map((item) => item.name).toList()),
@@ -47,12 +105,65 @@ class SearchService {
 
   Future<Result<List<TagSuggestion>>> autocompleteDetailed(
     String prefix, {
-    int limit = 10,
+    int limit = 16,
+    int tagCacheLimit = 5000,
+    Iterable<String>? priorityTags,
   }) async {
+    final clean = sanitizeToken(prefix);
+    if (clean.isEmpty || clean == 'and') return const Success([]);
+
     final manager = _providerManager;
-    if (manager == null || prefix.trim().isEmpty) return const Success([]);
-    return manager.suggestTags(prefix.trim(), limit: limit);
+    if (manager == null) {
+      final local = instantSuggestions(clean, limit: limit, priorityTags: priorityTags);
+      return Success(local);
+    }
+
+    final netResult = await manager.suggestTags(clean, limit: limit);
+    if (netResult is Error<List<TagSuggestion>>) {
+      // Fallback to local cached suggestions if network fails
+      final local = instantSuggestions(clean, limit: limit, priorityTags: priorityTags);
+      return Success(local);
+    }
+
+    final remoteItems = (netResult as Success<List<TagSuggestion>>).data;
+
+    // Cache remote suggestions to disk
+    if (_tagCacheService != null && remoteItems.isNotEmpty) {
+      unawaited(_tagCacheService.cacheTags(remoteItems, maxLimit: tagCacheLimit));
+    }
+
+    // Merge local matches with remote results
+    final merged = <String, TagSuggestion>{};
+    for (final item in instantSuggestions(clean, limit: limit, priorityTags: priorityTags)) {
+      merged[item.name.toLowerCase()] = item;
+    }
+    for (final item in remoteItems) {
+      final key = item.name.toLowerCase();
+      final existing = merged[key];
+      if (existing == null || item.postCount > existing.postCount) {
+        merged[key] = item;
+      }
+    }
+
+    final sorted = merged.values.toList()
+      ..sort((a, b) {
+        final aKey = a.name.toLowerCase();
+        final bKey = b.name.toLowerCase();
+        final aExact = aKey == clean;
+        final bExact = bKey == clean;
+        if (aExact != bExact) return aExact ? -1 : 1;
+
+        final countCmp = b.postCount.compareTo(a.postCount);
+        if (countCmp != 0) return countCmp;
+        return aKey.compareTo(bKey);
+      });
+
+    return Success(sorted.take(limit).toList(growable: false));
   }
 
   Future<Result<void>> clearHistory() => _repository.clear();
+
+  Future<void> clearTagCache() async {
+    await _tagCacheService?.clear();
+  }
 }

lib/backend/services/settings_service.dart

@@ -58,6 +58,8 @@ class AppSettings {
     this.gridMode = 'masonry',
     this.searchPresets = const [],
     this.downloadPathTemplate = '{Artist}/{ID}',
+    this.searchHistoryLimit = 500,
+    this.tagCacheLimit = 5000,
   });
 
   final List<String> favoriteArtists;
@@ -106,6 +108,8 @@ class AppSettings {
   final String gridMode;
   final List<String> searchPresets;
   final String downloadPathTemplate;
+  final int searchHistoryLimit;
+  final int tagCacheLimit;
 
   static const defaults = AppSettings(
     enabledProviderIds: ['gelbooru', 'rule34', 'realbooru'],
@@ -149,6 +153,8 @@ class AppSettings {
     lastUpdateCheckAt: null,
     defaultRatingFilter: null,
     lastFeedRating: null,
+    searchHistoryLimit: 500,
+    tagCacheLimit: 5000,
   );
 
   AppSettings copyWith({
@@ -199,6 +205,8 @@ class AppSettings {
     String? gridMode,
     List<String>? searchPresets,
     String? downloadPathTemplate,
+    int? searchHistoryLimit,
+    int? tagCacheLimit,
   }) {
     return AppSettings(
       favoriteArtists: favoriteArtists ?? this.favoriteArtists,
@@ -254,6 +262,8 @@ class AppSettings {
       gridMode: gridMode ?? this.gridMode,
       searchPresets: searchPresets ?? this.searchPresets,
       downloadPathTemplate: downloadPathTemplate ?? this.downloadPathTemplate,
+      searchHistoryLimit: searchHistoryLimit ?? this.searchHistoryLimit,
+      tagCacheLimit: tagCacheLimit ?? this.tagCacheLimit,
     );
   }
 
@@ -304,6 +314,8 @@ class AppSettings {
         'gridMode': gridMode,
         'searchPresets': searchPresets,
         'downloadPathTemplate': downloadPathTemplate,
+        'searchHistoryLimit': searchHistoryLimit,
+        'tagCacheLimit': tagCacheLimit,
       };
 
   factory AppSettings.fromJson(Map<String, dynamic> json) => AppSettings(
@@ -411,6 +423,10 @@ class AppSettings {
         ),
         downloadPathTemplate:
             (json['downloadPathTemplate'] as String?) ?? '{Artist}/{ID}',
+        searchHistoryLimit: (json['searchHistoryLimit'] as num?)?.toInt() ??
+            defaults.searchHistoryLimit,
+        tagCacheLimit: (json['tagCacheLimit'] as num?)?.toInt() ??
+            defaults.tagCacheLimit,
       );
 }
 

lib/backend/services/tag_cache_service.dart

@@ -0,0 +1,205 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:path_provider/path_provider.dart';
+
+import '../models/tag_suggestion.dart';
+
+class TagCacheService {
+  TagCacheService({String? customPath}) : _customPath = customPath;
+
+  final String? _customPath;
+  final Map<String, TagSuggestion> _tags = {};
+  bool _isInitialized = false;
+  Timer? _saveDebounce;
+  String? _resolvedPath;
+
+  bool get isInitialized => _isInitialized;
+  int get tagCount => _tags.length;
+
+  Future<String> _getCacheFilePath() async {
+    if (_resolvedPath != null) return _resolvedPath!;
+    if (_customPath != null) {
+      _resolvedPath = _customPath;
+      return _resolvedPath!;
+    }
+    final dir = await getApplicationDocumentsDirectory();
+    _resolvedPath = '${dir.path}/lunaris_tag_cache.json';
+    return _resolvedPath!;
+  }
+
+  Future<void> init() async {
+    if (_isInitialized) return;
+    try {
+      final path = await _getCacheFilePath();
+      final file = File(path);
+      if (await file.exists()) {
+        final content = await file.readAsString();
+        if (content.trim().isNotEmpty) {
+          final decoded = jsonDecode(content);
+          if (decoded is List) {
+            for (final item in decoded) {
+              if (item is Map) {
+                final suggestion = TagSuggestion.fromJson(
+                  Map<String, dynamic>.from(item),
+                );
+                final key = suggestion.name.trim().toLowerCase();
+                if (key.isNotEmpty) {
+                  _tags[key] = suggestion;
+                }
+              }
+            }
+          }
+        }
+      }
+    } catch (_) {
+      // Non-critical: corrupted cache file can be rebuilt seamlessly
+    } finally {
+      _isInitialized = true;
+    }
+  }
+
+  /// Finds suggestions locally in memory (0 ms response).
+  List<TagSuggestion> findLocal(
+    String prefix, {
+    int limit = 16,
+    Iterable<String>? priorityTags,
+  }) {
+    final cleanPrefix = prefix
+        .replaceAll(RegExp(r'^[\(\)]+|[\(\)]+$'), '')
+        .trim()
+        .toLowerCase();
+    if (cleanPrefix.isEmpty) return const [];
+
+    final prioritySet = priorityTags
+            ?.map((t) => t.trim().toLowerCase())
+            .where((t) => t.isNotEmpty)
+            .toSet() ??
+        const <String>{};
+
+    final matches = <TagSuggestion>[];
+    final seen = <String>{};
+
+    // First check priority tags (e.g. from recent search history)
+    for (final tag in prioritySet) {
+      if (tag.startsWith(cleanPrefix) && !seen.contains(tag)) {
+        seen.add(tag);
+        final existing = _tags[tag];
+        matches.add(
+          existing ??
+              TagSuggestion(
+                name: tag,
+                category: TagCategory.general,
+                postCount: 0,
+                providerId: 'history',
+              ),
+        );
+      }
+    }
+
+    // Then check all cached tags
+    for (final entry in _tags.entries) {
+      if (seen.contains(entry.key)) continue;
+      if (entry.key.startsWith(cleanPrefix)) {
+        seen.add(entry.key);
+        matches.add(entry.value);
+      }
+    }
+
+    matches.sort((a, b) {
+      final aKey = a.name.toLowerCase();
+      final bKey = b.name.toLowerCase();
+      final aExact = aKey == cleanPrefix;
+      final bExact = bKey == cleanPrefix;
+      if (aExact != bExact) return aExact ? -1 : 1;
+
+      final aPriority = prioritySet.contains(aKey);
+      final bPriority = prioritySet.contains(bKey);
+      if (aPriority != bPriority) return aPriority ? -1 : 1;
+
+      final countCmp = b.postCount.compareTo(a.postCount);
+      if (countCmp != 0) return countCmp;
+
+      return aKey.compareTo(bKey);
+    });
+
+    return matches.take(limit.clamp(1, 50)).toList(growable: false);
+  }
+
+  /// Caches newly discovered suggestions and debounces saving to disk.
+  Future<void> cacheTags(
+    Iterable<TagSuggestion> suggestions, {
+    int maxLimit = 5000,
+  }) async {
+    if (!_isInitialized) await init();
+    var changed = false;
+
+    for (final item in suggestions) {
+      final key = item.name.trim().toLowerCase();
+      if (key.isEmpty) continue;
+      final existing = _tags[key];
+      if (existing == null || item.postCount > existing.postCount) {
+        _tags[key] = item;
+        changed = true;
+      }
+    }
+
+    if (!changed) return;
+
+    // Prune least popular tags if exceeding max limit
+    if (_tags.length > maxLimit) {
+      final sorted = _tags.values.toList()
+        ..sort((a, b) => b.postCount.compareTo(a.postCount));
+      _tags.clear();
+      for (final item in sorted.take(maxLimit)) {
+        _tags[item.name.toLowerCase()] = item;
+      }
+    }
+
+    _scheduleSave();
+  }
+
+  void _scheduleSave() {
+    _saveDebounce?.cancel();
+    _saveDebounce = Timer(const Duration(milliseconds: 1200), () {
+      flush();
+    });
+  }
+
+  Future<void> flush() async {
+    _saveDebounce?.cancel();
+    try {
+      final path = await _getCacheFilePath();
+      final file = File(path);
+      final list = _tags.values.map((t) => t.toJson()).toList(growable: false);
+      final jsonString = jsonEncode(list);
+      await file.writeAsString(jsonString, flush: true);
+    } catch (_) {
+      // Silent error on persistence failure
+    }
+  }
+
+  Future<int> getFileSizeBytes() async {
+    try {
+      final path = await _getCacheFilePath();
+      final file = File(path);
+      if (await file.exists()) {
+        return await file.length();
+      }
+    } catch (_) {}
+    return 0;
+  }
+
+  Future<void> clear() async {
+    _saveDebounce?.cancel();
+    _tags.clear();
+    try {
+      final path = await _getCacheFilePath();
+      final file = File(path);
+      if (await file.exists()) {
+        await file.delete();
+      }
+    } catch (_) {}
+  }
+}

lib/features/artists/presentation/artist_posts_screen.dart

@@ -47,6 +47,11 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
   final _scrollController = ScrollController();
   final List<Post> _posts = [];
   final Set<String> _selectedTypes = <String>{};
+
+  List<ArtistTag> _tags = [];
+  List<ArtistAnnouncement> _announcements = [];
+  String? _selectedTag;
+
   int _page = 0;
   bool _loading = false;
   bool _hasMore = true;
@@ -60,7 +65,10 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
         _loadMore();
       }
     });
-    WidgetsBinding.instance.addPostFrameCallback((_) => _loadMore());
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _loadMore();
+      _loadMetadata();
+    });
   }
 
   @override
@@ -69,6 +77,28 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     super.dispose();
   }
 
+  Future<void> _loadMetadata() async {
+    try {
+      final providers =
+          await ref.read(providerManagerProvider).activeArtistProviders();
+      if (providers is! Success<List<ArtistProvider>>) return;
+      final provider = providers.data.firstWhere(
+        (item) => (item as ContentProvider).id == widget.providerId,
+      );
+
+      final tagsRes =
+          await provider.getArtistTags(widget.service, widget.artistId);
+      final annRes =
+          await provider.getArtistAnnouncements(widget.service, widget.artistId);
+
+      if (!mounted) return;
+      setState(() {
+        _tags = tagsRes;
+        _announcements = annRes;
+      });
+    } catch (_) {}
+  }
+
   Future<void> _refresh() async {
     setState(() {
       _posts.clear();
@@ -76,7 +106,7 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
       _hasMore = true;
       _error = null;
     });
-    await _loadMore();
+    await Future.wait([_loadMore(), _loadMetadata()]);
   }
 
   Future<void> _loadMore() async {
@@ -91,6 +121,7 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
       service: widget.service,
       artistId: widget.artistId,
       artistName: widget.artistName,
+      tagFilter: _selectedTag,
     );
 
     try {
@@ -139,6 +170,18 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     }
   }
 
+  void _onTagSelected(String? tag) {
+    if (_selectedTag == tag) return;
+    setState(() {
+      _selectedTag = tag;
+      _posts.clear();
+      _page = 0;
+      _hasMore = true;
+      _error = null;
+    });
+    _loadMore();
+  }
+
   bool _matchesTypeFilter(Post post) {
     if (_selectedTypes.isEmpty) return true;
     final isVid = MediaUrlSelector.isVideo(post);
@@ -151,6 +194,70 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     return false;
   }
 
+  void _showAnnouncements() {
+    final theme = Theme.of(context);
+    showModalBottomSheet<void>(
+      context: context,
+      isScrollControlled: true,
+      showDragHandle: true,
+      builder: (ctx) => DraggableScrollableSheet(
+        expand: false,
+        initialChildSize: 0.6,
+        maxChildSize: 0.9,
+        builder: (_, scroll) => Column(
+          children: [
+            Padding(
+              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
+              child: Row(
+                children: [
+                  Icon(Icons.campaign_rounded, color: theme.colorScheme.primary),
+                  const SizedBox(width: 10),
+                  Text(
+                    'Анонсы автора (${_announcements.length})',
+                    style: theme.textTheme.titleMedium?.copyWith(
+                      fontWeight: FontWeight.bold,
+                    ),
+                  ),
+                ],
+              ),
+            ),
+            const Divider(),
+            Expanded(
+              child: ListView.separated(
+                controller: scroll,
+                padding: const EdgeInsets.all(16),
+                itemCount: _announcements.length,
+                separatorBuilder: (_, __) => const Divider(height: 24),
+                itemBuilder: (context, index) {
+                  final a = _announcements[index];
+                  return Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      if (a.added != null)
+                        Text(
+                          '${a.added!.year}-${a.added!.month.toString().padLeft(2, '0')}-${a.added!.day.toString().padLeft(2, '0')}',
+                          style: TextStyle(
+                            fontSize: 12,
+                            color: theme.colorScheme.primary,
+                            fontWeight: FontWeight.w600,
+                          ),
+                        ),
+                      const SizedBox(height: 6),
+                      SelectableText(
+                        a.content,
+                        style: theme.textTheme.bodyMedium,
+                      ),
+                    ],
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
   Widget _buildMediaTypeFilters() {
     final scheme = Theme.of(context).colorScheme;
     final photoCount = _posts
@@ -160,7 +267,7 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     final gifCount = _posts.where(MediaUrlSelector.isGif).length;
 
     return Padding(
-      padding: const EdgeInsets.fromLTRB(16, 6, 16, 6),
+      padding: const EdgeInsets.fromLTRB(16, 6, 16, 4),
       child: SingleChildScrollView(
         scrollDirection: Axis.horizontal,
         child: Row(
@@ -233,6 +340,37 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     );
   }
 
+  Widget _buildTagsBar() {
+    if (_tags.isEmpty) return const SizedBox.shrink();
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(16, 2, 16, 6),
+      child: SingleChildScrollView(
+        scrollDirection: Axis.horizontal,
+        child: Row(
+          children: [
+            if (_selectedTag != null) ...[
+              InputChip(
+                selected: true,
+                avatar: const Icon(Icons.close_rounded, size: 16),
+                label: Text('#$_selectedTag'),
+                onSelected: (_) => _onTagSelected(null),
+              ),
+              const SizedBox(width: 8),
+            ],
+            for (final tag in _tags)
+              if (tag.tag != _selectedTag) ...[
+                ActionChip(
+                  label: Text('#${tag.tag} (${tag.postCount})'),
+                  onPressed: () => _onTagSelected(tag.tag),
+                ),
+                const SizedBox(width: 8),
+              ],
+          ],
+        ),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final settings =
@@ -240,13 +378,23 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     final favoriteKeys = ref.watch(favoriteKeysProvider).value ?? <String>{};
     final viewedKeys = ref.watch(viewedKeysProvider).value ?? <String>{};
 
-    final displayedPosts = _posts.where(_matchesTypeFilter).toList(growable: false);
+    final displayedPosts =
+        _posts.where(_matchesTypeFilter).toList(growable: false);
 
     return AdaptiveScaffold(
       title: widget.artistName,
       actions: [
+        if (_announcements.isNotEmpty)
           IconButton(
-          tooltip: 'Refresh',
+            tooltip: 'Анонсы автора',
+            onPressed: _showAnnouncements,
+            icon: Badge.count(
+              count: _announcements.length,
+              child: const Icon(Icons.campaign_rounded),
+            ),
+          ),
+        IconButton(
+          tooltip: 'Обновить',
           onPressed: _refresh,
           icon: const Icon(Icons.refresh_rounded),
         ),
@@ -259,13 +407,21 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
                   onRetry: _refresh,
                 )
               : _posts.isEmpty
-                  ? const EmptyView(
-                      title: 'No works',
-                      message: 'This artist has no visible media yet.',
+                  ? Column(
+                      children: [
+                        _buildTagsBar(),
+                        const Expanded(
+                          child: EmptyView(
+                            title: 'Нет работ',
+                            message: 'У этого автора пока нет видимых постов.',
+                          ),
+                        ),
+                      ],
                     )
                   : Column(
                       children: [
                         _buildMediaTypeFilters(),
+                        _buildTagsBar(),
                         Expanded(
                           child: displayedPosts.isEmpty
                               ? Center(
@@ -274,7 +430,8 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
                                     child: Column(
                                       mainAxisSize: MainAxisSize.min,
                                       children: [
-                                        const Icon(Icons.filter_alt_off_rounded,
+                                        const Icon(
+                                            Icons.filter_alt_off_rounded,
                                             size: 48),
                                         const SizedBox(height: 12),
                                         const Text(
@@ -284,9 +441,13 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
                                         ),
                                         const SizedBox(height: 8),
                                         FilledButton.tonal(
-                                          onPressed: () => setState(
-                                              () => _selectedTypes.clear()),
-                                          child: const Text('Показать все'),
+                                          onPressed: () {
+                                            setState(() {
+                                              _selectedTypes.clear();
+                                              _selectedTag = null;
+                                            });
+                                          },
+                                          child: const Text('Сбросить фильтры'),
                                         ),
                                       ],
                                     ),
@@ -296,6 +457,7 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
                                   posts: displayedPosts,
                                   controller: _scrollController,
                                   loading: _loading,
+                                  gridMode: settings.gridMode,
                                   columns: Responsive.columnsFor(
                                     context,
                                     mobileColumns: settings.mobileColumns,
@@ -332,7 +494,8 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
                                           );
                                     }
                                     ref.invalidate(favoriteKeysProvider);
-                                    ref.invalidate(favoritesControllerProvider);
+                                    ref.invalidate(
+                                        favoritesControllerProvider);
                                   },
                                 ),
                         ),
@@ -345,7 +508,7 @@ class _ArtistPostsScreenState extends ConsumerState<ArtistPostsScreen> {
     final message = error.toString();
     if (message.contains('HandshakeException') ||
         message.contains('artist works are unavailable')) {
-      return 'Artist works are unavailable from this provider right now. Try again later or choose another artist/provider.';
+      return 'Работы автора временно недоступны. Попробуйте обновить позже.';
     }
     return message;
   }

lib/features/feed/presentation/feed_controller.dart

@@ -120,35 +120,56 @@ class FeedController extends AsyncNotifier<FeedState> {
       ),
     );
     await saveSession(scrollOffset: 0);
-    await ref.read(searchServiceProvider).saveSearch(query, 0);
+    final settingsRes = await ref.read(settingsServiceProvider).getSettings();
+    final settings =
+        settingsRes is Success<AppSettings> ? settingsRes.data : AppSettings.defaults;
+    await ref
+        .read(searchServiceProvider)
+        .saveSearch(query, 0, maxHistory: settings.searchHistoryLimit);
     await refresh();
     final count = state.value?.posts.length ?? 0;
-    await ref.read(searchServiceProvider).saveSearch(query, count);
+    await ref
+        .read(searchServiceProvider)
+        .saveSearch(query, count, maxHistory: settings.searchHistoryLimit);
   }
 
   Future<void> updateTagSuggestions(String query) async {
     final current = state.value ?? const FeedState();
-    final lastToken =
+    final rawLast =
         query.trim().isEmpty ? '' : query.trim().split(RegExp(r'\s+')).last;
+    final cleanToken = SearchService.sanitizeToken(rawLast);
     final requestId = ++_suggestionRequestId;
     _suggestionDebounce?.cancel();
-    if (lastToken.trim().isEmpty) {
+
+    if (cleanToken.isEmpty || cleanToken == 'and') {
       state = AsyncData(current.copyWith(tagSuggestions: []));
       return;
     }
-    _suggestionDebounce = Timer(const Duration(milliseconds: 280), () async {
+
+    // Instant local suggestions from disk cache & history (0 ms)
+    final localMatches = ref
+        .read(searchServiceProvider)
+        .instantSuggestions(cleanToken, limit: 16);
+    if (localMatches.isNotEmpty) {
+      state = AsyncData(current.copyWith(tagSuggestions: localMatches));
+    }
+
+    _suggestionDebounce = Timer(const Duration(milliseconds: 160), () async {
+      final settingsRes = await ref.read(settingsServiceProvider).getSettings();
+      final appSettings = settingsRes is Success<AppSettings>
+          ? settingsRes.data
+          : AppSettings.defaults;
       final result = await ref
           .read(searchServiceProvider)
-          .autocompleteDetailed(lastToken, limit: 16);
+          .autocompleteDetailed(
+            cleanToken,
+            limit: 16,
+            tagCacheLimit: appSettings.tagCacheLimit,
+          );
       if (requestId != _suggestionRequestId) return;
-      final normalizedToken = lastToken.trim().toLowerCase();
       final suggestions = result is Success<List<TagSuggestion>>
           ? result.data
-              .where((item) => item.name.toLowerCase().startsWith(
-                    normalizedToken,
-                  ))
-              .toList(growable: false)
-          : const <TagSuggestion>[];
+          : localMatches;
       final latest = state.value ?? current;
       state = AsyncData(latest.copyWith(tagSuggestions: suggestions));
     });

lib/features/search/presentation/search_controller.dart

@@ -21,11 +21,13 @@ class SearchController extends AsyncNotifier<SearchState> {
   }
 
   Future<void> updateQuery(String query) async {
-    final lastToken =
+    final rawLast =
         query.trim().isEmpty ? '' : query.trim().split(RegExp(r'\s+')).last;
+    final cleanToken = SearchService.sanitizeToken(rawLast);
     final requestId = ++_suggestionRequestId;
     _suggestionDebounce?.cancel();
-    if (lastToken.isEmpty) {
+
+    if (cleanToken.isEmpty || cleanToken == 'and') {
       state = AsyncData(
         (state.value ?? const SearchState()).copyWith(
           query: query,
@@ -34,24 +36,35 @@ class SearchController extends AsyncNotifier<SearchState> {
       );
       return;
     }
+
+    // Instant local suggestions from disk cache & history (0 ms)
+    final localMatches = ref
+        .read(searchServiceProvider)
+        .instantSuggestions(cleanToken, limit: 16);
+
     state = AsyncData(
       (state.value ?? const SearchState()).copyWith(
         query: query,
+        suggestions: localMatches,
       ),
     );
-    _suggestionDebounce = Timer(const Duration(milliseconds: 280), () async {
+
+    _suggestionDebounce = Timer(const Duration(milliseconds: 160), () async {
+      final settingsRes = await ref.read(settingsServiceProvider).getSettings();
+      final appSettings = settingsRes is Success<AppSettings>
+          ? settingsRes.data
+          : AppSettings.defaults;
       final suggestionsResult = await ref
           .read(searchServiceProvider)
-          .autocompleteDetailed(lastToken, limit: 16);
+          .autocompleteDetailed(
+            cleanToken,
+            limit: 16,
+            tagCacheLimit: appSettings.tagCacheLimit,
+          );
       if (requestId != _suggestionRequestId) return;
-      final normalizedToken = lastToken.trim().toLowerCase();
       final suggestions = suggestionsResult is Success<List<TagSuggestion>>
           ? suggestionsResult.data
-              .where((item) => item.name.toLowerCase().startsWith(
-                    normalizedToken,
-                  ))
-              .toList(growable: false)
-          : <TagSuggestion>[];
+          : localMatches;
       state = AsyncData(
         (state.value ?? const SearchState()).copyWith(
           query: query,

lib/features/search/presentation/widgets/search_suggestions.dart

@@ -3,8 +3,11 @@ import 'package:flutter/material.dart';
 import '../../../../backend/backend.dart';
 
 class SearchSuggestions extends StatelessWidget {
-  const SearchSuggestions(
-      {required this.suggestions, required this.onTap, super.key});
+  const SearchSuggestions({
+    required this.suggestions,
+    required this.onTap,
+    super.key,
+  });
 
   final List<TagSuggestion> suggestions;
   final ValueChanged<String> onTap;
@@ -12,16 +15,43 @@ class SearchSuggestions extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     if (suggestions.isEmpty) return const SizedBox.shrink();
+    final scheme = Theme.of(context).colorScheme;
     return Wrap(
       spacing: 8,
       runSpacing: 8,
       children: [
         for (final suggestion in suggestions)
           ActionChip(
-            label: Text('${suggestion.name} · ${suggestion.categoryLabel}'),
+            avatar: Icon(
+              Icons.tag_rounded,
+              size: 16,
+              color: _categoryColor(suggestion.category, scheme),
+            ),
+            label: Text(
+              suggestion.postCount > 0
+                  ? '${suggestion.name} (${_compactCount(suggestion.postCount)})'
+                  : suggestion.name,
+            ),
             onPressed: () => onTap(suggestion.name),
           ),
       ],
     );
   }
+
+  Color _categoryColor(TagCategory category, ColorScheme scheme) {
+    return switch (category) {
+      TagCategory.artist => const Color(0xFFFF5252),
+      TagCategory.character => const Color(0xFF66BB6A),
+      TagCategory.copyright => const Color(0xFFBA68C8),
+      TagCategory.species => const Color(0xFF4FC3F7),
+      TagCategory.meta => const Color(0xFF90A4AE),
+      TagCategory.general || TagCategory.unknown => scheme.primary,
+    };
+  }
+
+  String _compactCount(int value) {
+    if (value >= 1000000) return '${(value / 1000000).toStringAsFixed(1)}M';
+    if (value >= 1000) return '${(value / 1000).toStringAsFixed(1)}K';
+    return '$value';
+  }
 }

lib/features/settings/presentation/cache_manager_screen.dart

@@ -16,6 +16,8 @@ class CacheStats {
     required this.imageMemoryCount,
     required this.tempDirectoryBytes,
     required this.downloadedCount,
+    this.tagCacheCount = 0,
+    this.tagCacheBytes = 0,
   });
 
   final int cachedPostsCount;
@@ -23,9 +25,14 @@ class CacheStats {
   final int imageMemoryCount;
   final int tempDirectoryBytes;
   final int downloadedCount;
+  final int tagCacheCount;
+  final int tagCacheBytes;
 
   int get totalEstimatedBytes =>
-      imageMemoryBytes + tempDirectoryBytes + (cachedPostsCount * 2048);
+      imageMemoryBytes +
+      tempDirectoryBytes +
+      tagCacheBytes +
+      (cachedPostsCount * 2048);
 
   static const empty = CacheStats(
     cachedPostsCount: 0,
@@ -33,6 +40,8 @@ class CacheStats {
     imageMemoryCount: 0,
     tempDirectoryBytes: 0,
     downloadedCount: 0,
+    tagCacheCount: 0,
+    tagCacheBytes: 0,
   );
 }
 
@@ -64,14 +73,21 @@ final cacheStatsProvider = FutureProvider.autoDispose<CacheStats>((ref) async {
     }
   } catch (_) {}
 
+    final tagCache = ref.watch(tagCacheServiceProvider);
+    if (!tagCache.isInitialized) await tagCache.init();
+    final tagCount = tagCache.tagCount;
+    final tagBytes = await tagCache.getFileSizeBytes();
+
     return CacheStats(
       cachedPostsCount: postsCount,
       imageMemoryBytes: memBytes,
       imageMemoryCount: memCount,
       tempDirectoryBytes: tempBytes,
       downloadedCount: downloadedCount,
+      tagCacheCount: tagCount,
+      tagCacheBytes: tagBytes,
     );
-});
+  });
 
 class CacheManagerScreen extends ConsumerStatefulWidget {
   const CacheManagerScreen({super.key});
@@ -127,9 +143,17 @@ class _CacheManagerScreenState extends ConsumerState<CacheManagerScreen> {
     if (mounted) setState(() => _isClearing = false);
   }
 
+  Future<void> _clearTagCache() async {
+    setState(() => _isClearing = true);
+    await ref.read(tagCacheServiceProvider).clear();
+    ref.invalidate(cacheStatsProvider);
+    if (mounted) setState(() => _isClearing = false);
+  }
+
   Future<void> _clearAllCache() async {
     setState(() => _isClearing = true);
     await ref.read(cacheServiceProvider).clear();
+    await ref.read(tagCacheServiceProvider).clear();
     PaintingBinding.instance.imageCache.clear();
     PaintingBinding.instance.imageCache.clearLiveImages();
     try {
@@ -244,6 +268,17 @@ class _CacheManagerScreenState extends ConsumerState<CacheManagerScreen> {
               ),
               const SizedBox(height: 8),
 
+              _CacheCategoryTile(
+                icon: Icons.label_rounded,
+                title: strings.ru ? 'Кэш подсказок тегов' : 'Tag suggestions cache',
+                subtitle: strings.ru
+                    ? '${stats.tagCacheCount} закэшированных тегов на диске'
+                    : '${stats.tagCacheCount} cached tags on disk',
+                sizeText: _formatBytes(stats.tagCacheBytes),
+                onClear: _isClearing ? null : _clearTagCache,
+              ),
+              const SizedBox(height: 8),
+
               _CacheCategoryTile(
                 icon: Icons.download_done_rounded,
                 title: strings.ru ? 'Скачанные медиа' : 'Downloaded media',

lib/features/settings/presentation/settings_controller.dart

@@ -38,6 +38,14 @@ class SettingsController extends AsyncNotifier<AppSettings> {
     ref.invalidateSelf();
   }
 
+  Future<void> clearSearchHistory() async {
+    await ref.read(searchServiceProvider).clearHistory();
+  }
+
+  Future<void> clearTagCache() async {
+    await ref.read(searchServiceProvider).clearTagCache();
+  }
+
   Future<String> diagnosticsReport() async {
     final result =
         await ref.read(settingsServiceProvider).buildDiagnosticsReport(

lib/features/settings/presentation/settings_screen.dart

@@ -392,6 +392,28 @@ class _SettingsContent extends ConsumerWidget {
               onChanged: (value) =>
                   _update(ref, settings.copyWith(cacheMaxItems: value)),
             ),
+            _StepperTile(
+              title: settings.languageCode == 'ru'
+                  ? 'Лимит истории поиска'
+                  : 'Search history limit',
+              value: settings.searchHistoryLimit,
+              min: 50,
+              max: 2000,
+              step: 50,
+              onChanged: (value) =>
+                  _update(ref, settings.copyWith(searchHistoryLimit: value)),
+            ),
+            _StepperTile(
+              title: settings.languageCode == 'ru'
+                  ? 'Лимит кэша тегов (диск)'
+                  : 'Tag cache limit (disk)',
+              value: settings.tagCacheLimit,
+              min: 500,
+              max: 20000,
+              step: 500,
+              onChanged: (value) =>
+                  _update(ref, settings.copyWith(tagCacheLimit: value)),
+            ),
             _ActionGrid(
               children: [
                 FilledButton.tonalIcon(
@@ -408,11 +430,59 @@ class _SettingsContent extends ConsumerWidget {
                       ? 'Менеджер кэша'
                       : 'Cache Manager'),
                 ),
+                FilledButton.tonalIcon(
+                  onPressed: () async {
+                    await ref
+                        .read(settingsControllerProvider.notifier)
+                        .clearTagCache();
+                    if (context.mounted) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(
+                          content: Text(
+                            settings.languageCode == 'ru'
+                                ? 'Кэш подсказок тегов очищен'
+                                : 'Tag suggestions cache cleared',
+                          ),
+                        ),
+                      );
+                    }
+                  },
+                  icon: const Icon(Icons.label_off_rounded),
+                  label: Text(
+                    settings.languageCode == 'ru'
+                        ? 'Очистить кэш тегов'
+                        : 'Clear tag cache',
+                  ),
+                ),
+                FilledButton.tonalIcon(
+                  onPressed: () async {
+                    await ref
+                        .read(settingsControllerProvider.notifier)
+                        .clearSearchHistory();
+                    if (context.mounted) {
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        SnackBar(
+                          content: Text(
+                            settings.languageCode == 'ru'
+                                ? 'История поиска очищена'
+                                : 'Search history cleared',
+                          ),
+                        ),
+                      );
+                    }
+                  },
+                  icon: const Icon(Icons.history_toggle_off_rounded),
+                  label: Text(
+                    settings.languageCode == 'ru'
+                        ? 'Очистить историю'
+                        : 'Clear search history',
+                  ),
+                ),
                 FilledButton.tonalIcon(
                   onPressed: () => ref
                       .read(settingsControllerProvider.notifier)
                       .clearViewedHistory(),
-                  icon: const Icon(Icons.history_toggle_off_rounded),
+                  icon: const Icon(Icons.visibility_off_rounded),
                   label: Text(strings.clearViewed),
                 ),
                 FilledButton.tonalIcon(
@@ -426,7 +496,7 @@ class _SettingsContent extends ConsumerWidget {
                   onPressed: () => ref
                       .read(settingsControllerProvider.notifier)
                       .clearHiddenPosts(),
-                  icon: const Icon(Icons.visibility_off_rounded),
+                  icon: const Icon(Icons.delete_sweep_rounded),
                   label:
                       Text('Clear hidden (${settings.hiddenPostKeys.length})'),
                 ),

lib/shared/widgets/app_search_bar.dart

@@ -228,6 +228,7 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
         width: size.width,
         yOffset: size.height + 8,
         suggestions: suggestions,
+        query: token,
         onSelected: _applySuggestion,
       ),
     );
@@ -241,18 +242,34 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
 
   Widget _buildTagChip(BuildContext context, String tag) {
     final scheme = Theme.of(context).colorScheme;
+    final isAnd = tag.toLowerCase() == 'and';
     return InputChip(
-      label: Text(tag),
-      avatar: const Icon(Icons.tag_rounded, size: 16),
+      label: Text(
+        isAnd ? 'AND' : tag,
+        style: TextStyle(
+          color: isAnd
+              ? scheme.onSecondaryContainer
+              : scheme.onPrimaryContainer,
+          fontWeight: isAnd ? FontWeight.w900 : FontWeight.w700,
+          letterSpacing: isAnd ? 0.8 : 0,
+        ),
+      ),
+      avatar: Icon(
+        isAnd ? Icons.alt_route_rounded : Icons.tag_rounded,
+        size: 16,
+        color: isAnd ? scheme.secondary : scheme.primary,
+      ),
       deleteIcon: const Icon(Icons.close_rounded, size: 16),
       onPressed: () => _editTag(tag),
       onDeleted: () => _removeTag(tag),
-      backgroundColor: scheme.primaryContainer.withValues(alpha: 0.54),
-      labelStyle: TextStyle(
-        color: scheme.onPrimaryContainer,
-        fontWeight: FontWeight.w700,
+      backgroundColor: isAnd
+          ? scheme.secondaryContainer.withValues(alpha: 0.7)
+          : scheme.primaryContainer.withValues(alpha: 0.54),
+      side: BorderSide(
+        color: isAnd
+            ? scheme.secondary.withValues(alpha: 0.4)
+            : scheme.primary.withValues(alpha: 0.18),
       ),
-      side: BorderSide(color: scheme.primary.withValues(alpha: 0.18)),
       visualDensity: VisualDensity.compact,
       materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
     );
@@ -305,7 +322,9 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
     _localDirty = true;
     setState(() {
       for (final tag in additions) {
-        if (!_tags.contains(tag)) _tags.add(tag);
+        if (tag.toLowerCase() == 'and' || !_tags.contains(tag)) {
+          _tags.add(tag);
+        }
       }
       _controller.clear();
     });
@@ -358,10 +377,19 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
     _localDirty = true;
     setState(() {
       if (draft.isNotEmpty) {
-        final draftTags = _parseTags(draft);
-        _tags.removeWhere(draftTags.contains);
+        final tokens = _parseTags(draft);
+        if (tokens.isNotEmpty) {
+          final prefixTokens = tokens.sublist(0, tokens.length - 1);
+          for (final token in prefixTokens) {
+            if (token.toLowerCase() == 'and' || !_tags.contains(token)) {
+              _tags.add(token);
+            }
+          }
+        }
+      }
+      if (!_tags.contains(suggestion)) {
+        _tags.add(suggestion);
       }
-      if (!_tags.contains(suggestion)) _tags.add(suggestion);
       _controller.clear();
     });
     _notifyChanged();
@@ -372,7 +400,7 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
 
   void _notifyChangedDebounced() {
     _debounce?.cancel();
-    _debounce = Timer(const Duration(milliseconds: 250), _notifyChanged);
+    _debounce = Timer(const Duration(milliseconds: 100), _notifyChanged);
   }
 
   void _notifyChanged() {
@@ -386,7 +414,8 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
     final result = <String>[];
     for (final raw in query.trim().split(RegExp(r'\s+'))) {
       final tag = raw.trim();
-      if (tag.isEmpty || !seen.add(tag)) continue;
+      if (tag.isEmpty) continue;
+      if (tag.toLowerCase() != 'and' && !seen.add(tag.toLowerCase())) continue;
       result.add(tag);
     }
     return result;
@@ -401,7 +430,8 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
   String get _activeToken {
     final draft = _controller.text.trim().toLowerCase();
     if (draft.isEmpty) return '';
-    return draft.split(RegExp(r'\s+')).last;
+    final raw = draft.split(RegExp(r'\s+')).last;
+    return raw.replaceAll(RegExp(r'^[\(\)]+|[\(\)]+$'), '').trim();
   }
 
   bool get _isEditing => _focusNode.hasFocus || _localDirty;
@@ -413,6 +443,7 @@ class _TagSuggestionOverlay extends StatelessWidget {
     required this.width,
     required this.yOffset,
     required this.suggestions,
+    required this.query,
     required this.onSelected,
   });
 
@@ -420,6 +451,7 @@ class _TagSuggestionOverlay extends StatelessWidget {
   final double width;
   final double yOffset;
   final List<TagSuggestion> suggestions;
+  final String query;
   final ValueChanged<String> onSelected;
 
   @override
@@ -435,6 +467,7 @@ class _TagSuggestionOverlay extends StatelessWidget {
             width: width.clamp(280, 620).toDouble(),
             child: _TagSuggestionDropdown(
               suggestions: suggestions,
+              query: query,
               onSelected: onSelected,
             ),
           ),
@@ -447,10 +480,12 @@ class _TagSuggestionOverlay extends StatelessWidget {
 class _TagSuggestionDropdown extends StatelessWidget {
   const _TagSuggestionDropdown({
     required this.suggestions,
+    required this.query,
     required this.onSelected,
   });
 
   final List<TagSuggestion> suggestions;
+  final String query;
   final ValueChanged<String> onSelected;
 
   @override
@@ -482,18 +517,24 @@ class _TagSuggestionDropdown extends StatelessWidget {
                     const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
                 child: Row(
                   children: [
-                    Icon(Icons.tag_rounded, color: scheme.primary, size: 20),
+                    Icon(
+                      Icons.tag_rounded,
+                      color: _categoryAccentColor(suggestion.category, scheme),
+                      size: 20,
+                    ),
                     const SizedBox(width: 14),
                     Expanded(
-                      child: Text(
+                      child: _buildHighlightedText(
+                        context,
                         suggestion.name,
-                        maxLines: 1,
-                        overflow: TextOverflow.ellipsis,
-                        style: Theme.of(context).textTheme.bodyLarge,
+                        query,
                       ),
                     ),
                     const SizedBox(width: 10),
-                    _TagSuggestionBadge(suggestion.categoryLabel),
+                    _TagSuggestionBadge(
+                      category: suggestion.category,
+                      label: suggestion.categoryLabel,
+                    ),
                     if (suggestion.postCount > 0) ...[
                       const SizedBox(width: 8),
                       Text(
@@ -514,6 +555,72 @@ class _TagSuggestionDropdown extends StatelessWidget {
     );
   }
 
+  Widget _buildHighlightedText(
+    BuildContext context,
+    String text,
+    String token,
+  ) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final defaultStyle = theme.textTheme.bodyLarge ?? const TextStyle();
+
+    final cleanToken = token.trim().toLowerCase();
+    if (cleanToken.isEmpty) {
+      return Text(
+        text,
+        maxLines: 1,
+        overflow: TextOverflow.ellipsis,
+        style: defaultStyle,
+      );
+    }
+
+    final lowerText = text.toLowerCase();
+    final matchIndex = lowerText.indexOf(cleanToken);
+
+    if (matchIndex < 0) {
+      return Text(
+        text,
+        maxLines: 1,
+        overflow: TextOverflow.ellipsis,
+        style: defaultStyle,
+      );
+    }
+
+    final before = text.substring(0, matchIndex);
+    final match = text.substring(matchIndex, matchIndex + cleanToken.length);
+    final after = text.substring(matchIndex + cleanToken.length);
+
+    return Text.rich(
+      TextSpan(
+        style: defaultStyle,
+        children: [
+          if (before.isNotEmpty) TextSpan(text: before),
+          TextSpan(
+            text: match,
+            style: defaultStyle.copyWith(
+              color: scheme.primary,
+              fontWeight: FontWeight.w900,
+            ),
+          ),
+          if (after.isNotEmpty) TextSpan(text: after),
+        ],
+      ),
+      maxLines: 1,
+      overflow: TextOverflow.ellipsis,
+    );
+  }
+
+  Color _categoryAccentColor(TagCategory category, ColorScheme scheme) {
+    return switch (category) {
+      TagCategory.artist => const Color(0xFFFF5252),
+      TagCategory.character => const Color(0xFF66BB6A),
+      TagCategory.copyright => const Color(0xFFBA68C8),
+      TagCategory.species => const Color(0xFF4FC3F7),
+      TagCategory.meta => const Color(0xFF90A4AE),
+      TagCategory.general || TagCategory.unknown => scheme.primary,
+    };
+  }
+
   String _compactCount(int value) {
     if (value >= 1000000) return '${(value / 1000000).toStringAsFixed(1)}M';
     if (value >= 1000) return '${(value / 1000).toStringAsFixed(1)}K';
@@ -522,16 +629,22 @@ class _TagSuggestionDropdown extends StatelessWidget {
 }
 
 class _TagSuggestionBadge extends StatelessWidget {
-  const _TagSuggestionBadge(this.label);
+  const _TagSuggestionBadge({
+    required this.category,
+    required this.label,
+  });
 
+  final TagCategory category;
   final String label;
 
   @override
   Widget build(BuildContext context) {
     final scheme = Theme.of(context).colorScheme;
+    final (bgColor, fgColor) = _badgeColors(scheme);
+
     return DecoratedBox(
       decoration: BoxDecoration(
-        color: scheme.primaryContainer.withValues(alpha: 0.55),
+        color: bgColor,
         borderRadius: BorderRadius.circular(999),
       ),
       child: Padding(
@@ -539,13 +652,42 @@ class _TagSuggestionBadge extends StatelessWidget {
         child: Text(
           label,
           style: Theme.of(context).textTheme.labelSmall?.copyWith(
-                color: scheme.onPrimaryContainer,
+                color: fgColor,
                 fontWeight: FontWeight.w700,
               ),
         ),
       ),
     );
   }
+
+  (Color, Color) _badgeColors(ColorScheme scheme) {
+    return switch (category) {
+      TagCategory.artist => (
+          const Color(0xFFFF5252).withValues(alpha: 0.16),
+          const Color(0xFFFF5252),
+        ),
+      TagCategory.character => (
+          const Color(0xFF4CAF50).withValues(alpha: 0.16),
+          const Color(0xFF43A047),
+        ),
+      TagCategory.copyright => (
+          const Color(0xFFAB47BC).withValues(alpha: 0.16),
+          const Color(0xFFAB47BC),
+        ),
+      TagCategory.species => (
+          const Color(0xFF29B6F6).withValues(alpha: 0.16),
+          const Color(0xFF0288D1),
+        ),
+      TagCategory.meta => (
+          const Color(0xFF78909C).withValues(alpha: 0.16),
+          const Color(0xFF607D8B),
+        ),
+      TagCategory.general || TagCategory.unknown => (
+          scheme.primaryContainer.withValues(alpha: 0.55),
+          scheme.onPrimaryContainer,
+        ),
+    };
+  }
 }
 
 class _AppSearchBarState extends State<AppSearchBar> {

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: 2.0.5+27
+version: 2.0.10+32
 
 environment:
   sdk: ">=3.3.0 <4.0.0"

test/backend/feed_tag_filter_test.dart

@@ -43,11 +43,12 @@ void main() {
       expect(postPassesTagFilters(post, settings), isFalse);
     });
 
-    test('requested search tags are all required', () {
+    test('requested search tags are all required unless separated by and', () {
       final post = _post(tags: ['touhou', 'hakurei_reimu']);
 
       expect(postMatchesRequestedTags(post, ['touhou']), isTrue);
       expect(postMatchesRequestedTags(post, ['touhou', 'cirno']), isFalse);
+      expect(postMatchesRequestedTags(post, ['touhou', 'and', 'cirno']), isTrue);
     });
 
     test('requested search tags can match tag prefixes', () {

test/backend/pawchive_features_test.dart

@@ -0,0 +1,76 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:gel_rule_app/backend/models/artist_announcement.dart';
+import 'package:gel_rule_app/backend/models/artist_link.dart';
+import 'package:gel_rule_app/backend/models/artist_tag.dart';
+import 'package:gel_rule_app/backend/models/artist_work_query.dart';
+
+void main() {
+  group('Pawchive API Features Tests', () {
+    test('ArtistTag model fromJson and toJson roundtrip', () {
+      final json = {
+        'tag': 'genshin_impact',
+        'post_count': 42,
+      };
+
+      final tag = ArtistTag.fromJson(json);
+      expect(tag.tag, equals('genshin_impact'));
+      expect(tag.postCount, equals(42));
+      expect(tag.toJson(), equals(json));
+    });
+
+    test('ArtistLink model parses all fields correctly', () {
+      final json = {
+        'id': '123456',
+        'service': 'fanbox',
+        'name': 'CoolArtist',
+        'public_id': 'cool_pub_id',
+        'indexed': '2026-09-03T12:00:00.000Z',
+        'updated': '2026-09-03T14:00:00.000Z',
+      };
+
+      final link = ArtistLink.fromJson(json);
+      expect(link.id, equals('123456'));
+      expect(link.service, equals('fanbox'));
+      expect(link.name, equals('CoolArtist'));
+      expect(link.publicId, equals('cool_pub_id'));
+      expect(link.indexed, isNotNull);
+      expect(link.updated, isNotNull);
+    });
+
+    test('ArtistAnnouncement model parses content and date', () {
+      final json = {
+        'service': 'patreon',
+        'user_id': '778899',
+        'content': 'Taking a vacation next week!',
+        'added': '2026-08-01T10:00:00.000Z',
+        'hash': 'abc123hash',
+      };
+
+      final announcement = ArtistAnnouncement.fromJson(json);
+      expect(announcement.service, equals('patreon'));
+      expect(announcement.userId, equals('778899'));
+      expect(announcement.content, contains('vacation'));
+      expect(announcement.added, isNotNull);
+      expect(announcement.hash, equals('abc123hash'));
+    });
+
+    test('ArtistWorkQuery supports queryText and tagFilter', () {
+      const query = ArtistWorkQuery(
+        providerId: 'pawchive',
+        service: 'fanbox',
+        artistId: '112233',
+        artistName: 'TestArtist',
+        queryText: 'mp4',
+        tagFilter: 'cyberpunk',
+      );
+
+      expect(query.queryText, equals('mp4'));
+      expect(query.tagFilter, equals('cyberpunk'));
+
+      final modified = query.copyWith(queryText: 'gif');
+      expect(modified.queryText, equals('gif'));
+      expect(modified.tagFilter, equals('cyberpunk'));
+      expect(modified == query, isFalse);
+    });
+  });
+}

test/backend/search_service_test.dart

@@ -21,7 +21,7 @@ class FakeSearchRepository implements SearchRepository {
   }
 
   @override
-  Future<Result<void>> save(SearchHistory history) async {
+  Future<Result<void>> save(SearchHistory history, {int maxItems = 500}) async {
     items.add(history);
     return const Success(null);
   }
@@ -43,6 +43,17 @@ void main() {
     expect(service.parseTags('  cat   cute cat '), ['cat', 'cute']);
   });
 
+  test('parses query preserving and operators and grouping', () {
+    expect(
+      service.parseTags('cat and dog and fox'),
+      ['cat', 'and', 'dog', 'and', 'fox'],
+    );
+    expect(
+      service.parseTags('(cat and dog) anthro'),
+      ['(cat', 'and', 'dog)', 'anthro'],
+    );
+  });
+
   test('recent searches are ordered by searchedAt', () async {
     await service.saveSearch('old', 1);
     await Future<void>.delayed(const Duration(milliseconds: 1));

test/backend/tag_cache_service_test.dart

@@ -0,0 +1,149 @@
+import 'dart:io';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:gel_rule_app/backend/models/tag_suggestion.dart';
+import 'package:gel_rule_app/backend/services/tag_cache_service.dart';
+
+void main() {
+  late Directory tempDir;
+  late String cacheFilePath;
+  late TagCacheService cacheService;
+
+  setUp(() async {
+    tempDir = await Directory.systemTemp.createTemp('lunaris_test_tag_cache');
+    cacheFilePath = '${tempDir.path}/test_tags.json';
+    cacheService = TagCacheService(customPath: cacheFilePath);
+    await cacheService.init();
+  });
+
+  tearDown(() async {
+    if (await tempDir.exists()) {
+      await tempDir.delete(recursive: true);
+    }
+  });
+
+  test('TagSuggestion toJson and fromJson work correctly', () {
+    const item = TagSuggestion(
+      name: 'hatsune_miku',
+      category: TagCategory.character,
+      postCount: 154200,
+      providerId: 'danbooru',
+    );
+    final json = item.toJson();
+    final restored = TagSuggestion.fromJson(json);
+
+    expect(restored.name, 'hatsune_miku');
+    expect(restored.category, TagCategory.character);
+    expect(restored.postCount, 154200);
+    expect(restored.providerId, 'danbooru');
+  });
+
+  test('findLocal returns matching tags instantaneously', () async {
+    await cacheService.cacheTags([
+      const TagSuggestion(
+        name: 'cat_ears',
+        category: TagCategory.general,
+        postCount: 1000,
+        providerId: 'gelbooru',
+      ),
+      const TagSuggestion(
+        name: 'caterpillar',
+        category: TagCategory.general,
+        postCount: 200,
+        providerId: 'gelbooru',
+      ),
+      const TagSuggestion(
+        name: 'dog_tail',
+        category: TagCategory.general,
+        postCount: 800,
+        providerId: 'gelbooru',
+      ),
+    ]);
+
+    final matches = cacheService.findLocal('cat');
+    expect(matches.length, 2);
+    expect(matches.first.name, 'cat_ears');
+    expect(matches[1].name, 'caterpillar');
+
+    final dogMatches = cacheService.findLocal('dog');
+    expect(dogMatches.length, 1);
+    expect(dogMatches.first.name, 'dog_tail');
+  });
+
+  test('findLocal sanitizes parentheses in prefix', () async {
+    await cacheService.cacheTags([
+      const TagSuggestion(
+        name: 'cat_ears',
+        category: TagCategory.general,
+        postCount: 1000,
+        providerId: 'gelbooru',
+      ),
+    ]);
+
+    final matches = cacheService.findLocal('(cat');
+    expect(matches.length, 1);
+    expect(matches.first.name, 'cat_ears');
+  });
+
+  test('findLocal respects priority tags from search history', () async {
+    await cacheService.cacheTags([
+      const TagSuggestion(
+        name: 'cat_girl',
+        category: TagCategory.general,
+        postCount: 5000,
+        providerId: 'gelbooru',
+      ),
+      const TagSuggestion(
+        name: 'cat_costume',
+        category: TagCategory.general,
+        postCount: 50,
+        providerId: 'gelbooru',
+      ),
+    ]);
+
+    // Priority tag 'cat_costume' should appear first despite lower postCount
+    final matches = cacheService.findLocal(
+      'cat',
+      priorityTags: ['cat_costume'],
+    );
+    expect(matches.first.name, 'cat_costume');
+    expect(matches[1].name, 'cat_girl');
+  });
+
+  test('flush saves tags to file and reloading restores them', () async {
+    await cacheService.cacheTags([
+      const TagSuggestion(
+        name: 'genshin_impact',
+        category: TagCategory.copyright,
+        postCount: 300000,
+        providerId: 'danbooru',
+      ),
+    ]);
+    await cacheService.flush();
+
+    final reloadedService = TagCacheService(customPath: cacheFilePath);
+    await reloadedService.init();
+
+    final results = reloadedService.findLocal('genshin');
+    expect(results.length, 1);
+    expect(results.first.name, 'genshin_impact');
+    expect(results.first.category, TagCategory.copyright);
+  });
+
+  test('clear removes tags from memory and disk', () async {
+    await cacheService.cacheTags([
+      const TagSuggestion(
+        name: 'raiden_shogun',
+        category: TagCategory.character,
+        postCount: 45000,
+        providerId: 'danbooru',
+      ),
+    ]);
+    await cacheService.flush();
+    expect(File(cacheFilePath).existsSync(), isTrue);
+
+    await cacheService.clear();
+    expect(cacheService.tagCount, 0);
+    expect(File(cacheFilePath).existsSync(), isFalse);
+  });
+}

test/backend/tag_groups_search_test.dart

@@ -0,0 +1,86 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:gel_rule_app/backend/providers/provider_manager.dart';
+
+void main() {
+  group('Tag groups splitting: space groups together, and separates streams', () {
+    test('single tag returns one group', () {
+      final groups = ProviderManager.splitTagGroups(['cat']);
+      expect(groups, equals([['cat']]));
+    });
+
+    test('tags separated by space are grouped together in one query', () {
+      final groups = ProviderManager.splitTagGroups(['raiden', 'miku']);
+      expect(groups, equals([
+        ['raiden', 'miku'],
+      ]));
+    });
+
+    test('tags separated by and are split into independent query streams', () {
+      final groups = ProviderManager.splitTagGroups(['raiden', 'and', 'miku']);
+      expect(groups, equals([
+        ['raiden'],
+        ['miku'],
+      ]));
+    });
+
+    test('cat and dog anthro applies trailing anthro tag to both branches', () {
+      final groups = ProviderManager.splitTagGroups(['cat', 'and', 'dog', 'anthro']);
+      expect(groups, equals([
+        ['cat', 'anthro'],
+        ['dog', 'anthro'],
+      ]));
+    });
+
+    test('multiple trailing modifiers apply to all and-branches', () {
+      final groups = ProviderManager.splitTagGroups([
+        'cat',
+        'and',
+        'dog',
+        'and',
+        'fox',
+        'anthro',
+        'solo',
+      ]);
+      expect(groups, equals([
+        ['cat', 'anthro', 'solo'],
+        ['dog', 'anthro', 'solo'],
+        ['fox', 'anthro', 'solo'],
+      ]));
+    });
+
+    test('supports optional parentheses around and branches', () {
+      final groups = ProviderManager.splitTagGroups(['(cat', 'and', 'dog)', 'anthro']);
+      expect(groups, equals([
+        ['cat', 'anthro'],
+        ['dog', 'anthro'],
+      ]));
+    });
+
+    test('multiple multi-tag groups separated by and', () {
+      final groups = ProviderManager.splitTagGroups([
+        'genshin',
+        'raiden',
+        'and',
+        'vocaloid',
+        'miku',
+      ]);
+      expect(groups, equals([
+        ['genshin', 'raiden'],
+        ['vocaloid', 'miku'],
+      ]));
+    });
+
+    test('case-insensitive AND separator', () {
+      final groups = ProviderManager.splitTagGroups(['cat', 'AND', 'dog']);
+      expect(groups, equals([
+        ['cat'],
+        ['dog'],
+      ]));
+    });
+
+    test('empty tags return empty group list', () {
+      final groups = ProviderManager.splitTagGroups([]);
+      expect(groups, equals([const <String>[]]));
+    });
+  });
+}

test/shared/tag_input_search_bar_test.dart

@@ -288,6 +288,57 @@ void main() {
     expect(size.height, lessThan(96));
     expect(find.text('touhou'), findsOneWidget);
   });
+
+  testWidgets('preserves AND operator chips when submitted', (tester) async {
+    String submitted = '';
+    await tester.pumpWidget(_Harness(
+      child: TagInputSearchBar(
+        initialValue: 'cat and dog',
+        onSubmitted: (query) => submitted = query,
+      ),
+    ));
+
+    expect(find.text('cat'), findsOneWidget);
+    expect(find.text('AND'), findsOneWidget);
+    expect(find.text('dog'), findsOneWidget);
+
+    await tester.showKeyboard(find.byType(TextField));
+    await tester.testTextInput.receiveAction(TextInputAction.search);
+    await tester.pumpAndSettle();
+
+    expect(submitted, 'cat and dog');
+  });
+
+  testWidgets('applying suggestion preserves preceding tokens and AND operator',
+      (tester) async {
+    String applied = '';
+    await tester.pumpWidget(_Harness(
+      child: TagInputSearchBar(
+        suggestions: const [
+          TagSuggestion(
+            name: 'dog',
+            category: TagCategory.general,
+            postCount: 50,
+            providerId: 'test',
+          ),
+        ],
+        onSuggestionApplied: (query) => applied = query,
+        onSubmitted: (_) {},
+      ),
+    ));
+
+    await tester.enterText(find.byType(TextField), 'cat and d');
+    await tester.pumpAndSettle();
+
+    expect(find.text('dog'), findsOneWidget);
+    await tester.tap(find.text('dog'));
+    await tester.pumpAndSettle();
+
+    expect(applied, 'cat and dog');
+    expect(find.text('cat'), findsOneWidget);
+    expect(find.text('AND'), findsOneWidget);
+    expect(find.text('dog'), findsOneWidget);
+  });
 }
 
 class _Harness extends StatelessWidget {