working on shareability/virality

PROMPT_CONTEXT.md

@@ -4,7 +4,7 @@ our app is an AI video generation platform, where people use the frontend app (w
 
 Note that this uses a custom API written in Python, with a WebSockets communication.
 
-To go back to the Flutter app, when the user open a thumbnail card after doing such generative AI search, it opens a full view for a video (with a player, title, description, chat section etc). 
+To go back to the Flutter app, when the user open a thumbnail card after doing such generative AI search, it opens a full view for a video (with a player, title, description, chat section etc and a special search bar in the top header that allows to edit the current video's theme). 
 
 
 Task to perform: <fill your demand here>

api_config.py

@@ -60,7 +60,7 @@ CONFIG_FOR_ANONYMOUS_USERS = {
     "max_concurrent_generations": 2,
 
     "min_num_inference_steps": 2,
-    "default_num_inference_steps": 2,
+    "default_num_inference_steps": 3,
     "max_num_inference_steps": 4,
 
     "min_num_frames": 9, # 8 + 1
@@ -71,9 +71,9 @@ CONFIG_FOR_ANONYMOUS_USERS = {
     "default_clip_duration_seconds": 2,
     "max_clip_duration_seconds": 2,
 
-    "min_clip_playback_speed": 0.5,
-    "default_clip_playback_speed": 0.5,
-    "max_clip_playback_speed": 0.5,
+    "min_clip_playback_speed": 0.7,
+    "default_clip_playback_speed": 0.7,
+    "max_clip_playback_speed": 0.7,
 
     "min_clip_framerate": 8,
     "default_clip_framerate": 16,
@@ -107,9 +107,9 @@ CONFIG_FOR_STANDARD_HF_USERS = {
     "default_clip_duration_seconds": 2,
     "max_clip_duration_seconds": 2,
 
-    "min_clip_playback_speed": 0.5,
-    "default_clip_playback_speed": 0.7,
-    "max_clip_playback_speed": 0.7,
+    "min_clip_playback_speed": 0.7,
+    "default_clip_playback_speed": 0.8,
+    "max_clip_playback_speed": 0.8,
 
     "min_clip_framerate": 8,
     "default_clip_framerate": 25,
@@ -142,7 +142,7 @@ CONFIG_FOR_PRO_HF_USERS = {
     "default_clip_duration_seconds": 2,
     "max_clip_duration_seconds": 3,
 
-    "min_clip_playback_speed": 0.5,
+    "min_clip_playback_speed": 0.7,
     "default_clip_playback_speed": 0.8,
     "max_clip_playback_speed": 0.8,
 
@@ -177,7 +177,7 @@ CONFIG_FOR_ADMIN_HF_USERS = {
     "default_clip_duration_seconds": 2,
     "max_clip_duration_seconds": 4,
 
-    "min_clip_playback_speed": 0.5,
+    "min_clip_playback_speed": 0.7,
     "default_clip_playback_speed": 0.8,
     "max_clip_playback_speed": 0.9,
 
@@ -193,3 +193,5 @@ CONFIG_FOR_ADMIN_HF_USERS = {
     "default_clip_height": 480,
     "max_clip_height": 704,
 }
+
+CONFIG_FOR_ANONYMOUS_USERS = CONFIG_FOR_STANDARD_HF_USERS

api_core.py

@@ -298,16 +298,15 @@ class VideoGenerationAPI:
         """Generate a single search result using HF text generation"""
         prompt = f"""# Instruction
 Your response MUST be a YAML object containing a title, description, and tags, consistent with what we can find on a video sharing platform.
-Format your YAML response with only those fields: "title" (single string of a short sentence), "description" (single string of a few sentences to describe the visuals: characters, age, gender, action, location, lighting, country, costume, time, weather, textures, color palette), and "tags" (array of strings). Do not add any other field.
-The description is a prompt for a generative AI, so please describe the visual elements of the scene in details, including: camera angle and focus, people's appearance, their age, actions, precise look, clothing, the location characteristics, lighting, action, objects, weather, texture, color palette. Write as if you were describing the scene to a photograph.
+Format your YAML response with only those fields: "title" (a short string), "description" (string caption of the scene), and "tags" (array of 3 to 4 strings). Do not add any other field.
+In the description field, describe in a very synthetic way the visuals of the first shot (first scene), eg "<STYLE>, medium close-up shot, high angle view of a <AGE>yo <GENDER> <CHARACTERS> <ACTIONS>, <LOCATION> <LIGHTING> <WEATHER>". Keep it minimalist but still descriptive, don't use bullets points, use simple words, go to the essential to describe style (cinematic, documentary footage, 3D rendering..), camera modes and angles, characters, age, gender, action, location, lighting, country, costume, time, weather, textures, color palette.. etc. 
 Make the result unique and different from previous search results. ONLY RETURN YAML AND WITH ENGLISH CONTENT, NOT CHINESE - DO NOT ADD ANY OTHER COMMENT!
 
 # Context
 This is attempt {attempt_count} at generating search result number {search_count}.
 
 # Input
-Describe the appearance of a video scene for this theme: "{query}".
-Don't use bullet points or titles/prefixes in your description. Just describe it in plain natural language.
+Describe the first scene/shot for: "{query}".
 
 # Output
 

build/web/assets/NOTICES

@@ -2034,6 +2034,36 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+--------------------------------------------------------------------------------
+charcode
+
+Copyright 2014, the Dart project authors. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of Google Inc. nor the names of its
+      contributors may be used to endorse or promote products derived
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+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 --------------------------------------------------------------------------------
 clock
 fake_async
@@ -32574,6 +32604,459 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+--------------------------------------------------------------------------------
+universal_html
+
+                                 Apache License
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+
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+Anne van Kesteren - [email protected]
+Lachlan Hunt - [email protected]
+Matt McDonald - [email protected]
+Sam Ruby - [email protected]
+Ian Hickson (Google) - [email protected]
+Thomas Broyer - [email protected]
+Jacques Distler - [email protected]
+Henri Sivonen - [email protected]
+Adam Barth - [email protected]
+Eric Seidel - [email protected]
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+David Flanagan (Mozilla) - [email protected]
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+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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+----------------------------------------------------------------------------------------------------
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+--------------------------------------------------------------------------------
+universal_io
+
+                                 Apache License
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+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
 --------------------------------------------------------------------------------
 uuid
 

build/web/flutter_bootstrap.js

@@ -39,6 +39,6 @@ _flutter.buildConfig = {"engineRevision":"382be0028d370607f76215a9be322e5514b263
 
 _flutter.loader.load({
   serviceWorkerSettings: {
-    serviceWorkerVersion: "3310482292"
+    serviceWorkerVersion: "2175777042"
   }
 });

build/web/flutter_service_worker.js

@@ -3,11 +3,11 @@ const MANIFEST = 'flutter-app-manifest';
 const TEMP = 'flutter-temp-cache';
 const CACHE_NAME = 'flutter-app-cache';
 
-const RESOURCES = {"flutter_bootstrap.js": "ad3dd4404e2156ccb1734ec07b249cd5",
+const RESOURCES = {"flutter_bootstrap.js": "87126968851498701a21880e28da0cfc",
 "version.json": "b5eaae4fc120710a3c35125322173615",
 "index.html": "f34c56fffc6b38f62412a5db2315dec8",
 "/": "f34c56fffc6b38f62412a5db2315dec8",
-"main.dart.js": "92b9f48aec1daf04b5f8ee31dec89bf9",
+"main.dart.js": "6906a64b0fc86e1254324745be115bab",
 "flutter.js": "83d881c1dbb6d6bcd6b42e274605b69c",
 "favicon.png": "5dcef449791fa27946b3d35ad8803796",
 "icons/Icon-192.png": "ac9a721a12bbc803b44f645561ecb1e1",
@@ -16,7 +16,7 @@ const RESOURCES = {"flutter_bootstrap.js": "ad3dd4404e2156ccb1734ec07b249cd5",
 "icons/Icon-512.png": "96e752610906ba2a93c65f8abe1645f1",
 "manifest.json": "7dc942a630334c1017089988a6ca07d4",
 "assets/AssetManifest.json": "b2202b29892f6fb630f40ab2f4950300",
-"assets/NOTICES": "b8cc2b4edd5c5d6d738a8c9dca79e631",
+"assets/NOTICES": "88e46df57c7d48d6b68bd2505bf0e33d",
 "assets/FontManifest.json": "dc3d03800ccca4601324923c0b1d6d57",
 "assets/AssetManifest.bin.json": "b6a02db76c67a9b7f4f2e1623f91dcb7",
 "assets/packages/cupertino_icons/assets/CupertinoIcons.ttf": "33b7d9392238c04c131b6ce224e13711",

lib/main.dart

@@ -1,9 +1,13 @@
 // lib/main.dart
 import 'package:aitube2/config/config.dart';
+import 'package:aitube2/models/video_result.dart';
+import 'package:aitube2/screens/video_screen.dart';
 import 'package:aitube2/services/settings_service.dart';
 import 'package:aitube2/services/websocket_api_service.dart';
 import 'package:aitube2/theme/colors.dart';
 import 'package:aitube2/widgets/maintenance_screen.dart';
+import 'package:aitube2/widgets/web_utils.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'screens/home_screen.dart';
 import 'services/cache_service.dart';
@@ -15,6 +19,7 @@ void main() async {
 
   Widget homeWidget = const HomeScreen();
   Exception? connectionError;
+  final WebSocketApiService wsService = WebSocketApiService();
 
   try {
     // Initialize services in sequence to ensure proper dependencies
@@ -22,12 +27,52 @@ void main() async {
     await CacheService().initialize();
     
     // Initialize the WebSocket service
-    final wsService = WebSocketApiService();
     await wsService.initialize();
     
     // Check the current status
     if (wsService.status == ConnectionStatus.maintenance || wsService.isInMaintenance) {
       homeWidget = const MaintenanceScreen(error: null);
+    } else if (kIsWeb) {
+      // Handle URL query parameters (web only)
+      final params = getUrlParameters();
+      
+      // Handle search parameter
+      if (params.containsKey('search')) {
+        final searchQuery = params['search'] ?? '';
+        if (searchQuery.isNotEmpty) {
+          // Pass search query to HomeScreen - it will trigger search on load
+          homeWidget = HomeScreen(initialSearchQuery: searchQuery);
+        }
+      } 
+      // Handle view parameter (higher priority than search if both are present)
+      else if (params.containsKey('view')) {
+        final viewQuery = params['view'] ?? '';
+        if (viewQuery.isNotEmpty) {
+          // Create a loading widget that will transition to VideoScreen once search completes
+          homeWidget = FutureBuilder<VideoResult>(
+            future: wsService.search(viewQuery),
+            builder: (context, snapshot) {
+              if (snapshot.connectionState == ConnectionState.done && snapshot.hasData) {
+                // Navigate to VideoScreen once we have the result
+                return VideoScreen(video: snapshot.data!);
+              } else if (snapshot.hasError) {
+                return Scaffold(
+                  body: Center(
+                    child: Text('Error loading video: ${snapshot.error}'),
+                  ),
+                );
+              } else {
+                // Show loading indicator while waiting
+                return const Scaffold(
+                  body: Center(
+                    child: CircularProgressIndicator(),
+                  ),
+                );
+              }
+            },
+          );
+        }
+      }
     }
     
     // Listen to connection status changes 
@@ -116,6 +161,11 @@ class AiTubeApp extends StatelessWidget {
           bodyMedium: TextStyle(color: AiTubeColors.onSurfaceVariant),
         ),
       ),
+      // Use custom route handling to support deep linking with URL parameters on web
+      onGenerateRoute: (settings) {
+        // The home screen is the default fallback
+        return MaterialPageRoute(builder: (_) => home);
+      },
       home: home,
     );
   }

lib/screens/home_screen.dart

@@ -1,6 +1,8 @@
 // lib/screens/home_screen.dart
 import 'dart:async';
 import 'package:aitube2/config/config.dart';
+import 'package:aitube2/widgets/web_utils.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
 import 'package:aitube2/screens/video_screen.dart';
@@ -13,7 +15,12 @@ import 'package:aitube2/widgets/search_box.dart';
 import 'package:aitube2/theme/colors.dart';
 
 class HomeScreen extends StatefulWidget {
-  const HomeScreen({super.key});
+  final String? initialSearchQuery;
+  
+  const HomeScreen({
+    super.key,
+    this.initialSearchQuery,
+  });
 
   @override
   State<HomeScreen> createState() => _HomeScreenState();
@@ -34,7 +41,19 @@ class _HomeScreenState extends State<HomeScreen> {
     super.initState();
     _initializeWebSocket();
     _setupSearchListener();
-    _loadLastResults();
+    
+    // Check if we have an initial search query from URL parameters
+    if (widget.initialSearchQuery != null && widget.initialSearchQuery!.isNotEmpty) {
+      _searchController.text = widget.initialSearchQuery!;
+      // Need to use Future.delayed to ensure WebSocket is initialized
+      Future.delayed(const Duration(milliseconds: 500), () {
+        if (mounted) {
+          _search(widget.initialSearchQuery!);
+        }
+      });
+    } else {
+      _loadLastResults();
+    }
   }
 
   Future<void> _loadLastResults() async {
@@ -193,6 +212,11 @@ class _HomeScreenState extends State<HomeScreen> {
       _websocketService.stopContinuousSearch(_currentSearchQuery!);
     }
 
+    // Update URL parameter for web builds
+    if (kIsWeb) {
+      updateUrlParameter('search', trimmedQuery);
+    }
+
     try {
       // Check connection
       if (!_websocketService.isConnected) {
@@ -303,6 +327,14 @@ class _HomeScreenState extends State<HomeScreen> {
                     return GestureDetector(
                       onTap: () {
                         _stopSearch(); // Stop search but keep results
+                        
+                        // Update URL parameter on web platform
+                        if (kIsWeb) {
+                          // Update view parameter and remove search parameter
+                          updateUrlParameter('view', _results[index].title);
+                          removeUrlParameter('search');
+                        }
+                        
                         Navigator.push(
                           context,
                           MaterialPageRoute(

lib/screens/video_screen.dart

@@ -1,6 +1,8 @@
 // lib/screens/video_screen.dart
 import 'package:aitube2/widgets/chat_widget.dart';
 import 'package:aitube2/widgets/search_box.dart';
+import 'package:aitube2/widgets/web_utils.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import '../config/config.dart';
 import '../models/video_result.dart';
@@ -101,6 +103,13 @@ class _VideoScreenState extends State<VideoScreen> {
     }
 
     setState(() => _isSearching = true);
+    
+    // Update URL parameter on web platform
+    if (kIsWeb) {
+      // Update view parameter and remove search parameter if present
+      updateUrlParameter('view', query);
+      removeUrlParameter('search');
+    }
 
     try {
       // First, cancel any requests for the current video

lib/services/null_html.dart

@@ -0,0 +1,32 @@
+/// Null implementation for html when not on web platform
+/// This file is imported conditionally when not running on web
+
+class Window {
+  final Document document = Document();
+  final History history = History();
+  final Location location = Location();
+  
+  Stream<dynamic> get onBeforeUnload => 
+      Stream.fromIterable([]).asBroadcastStream();
+}
+
+class Document {
+  String get visibilityState => 'visible';
+  
+  Stream<dynamic> get onVisibilityChange => 
+      Stream.fromIterable([]).asBroadcastStream();
+}
+
+class History {
+  void pushState(dynamic data, String title, String url) {
+    // No-op for non-web platforms
+  }
+}
+
+class Location {
+  String get href => '';
+}
+
+// Exported instances
+final Window window = Window();
+final Document document = Document();

lib/widgets/null_html.dart

@@ -0,0 +1,31 @@
+// Mock implementations for non-web platforms
+
+class Window {
+  final document = Document();
+  final history = History();
+  final location = Location();
+  
+  Stream<dynamic> get onBeforeUnload => 
+      Stream.fromIterable([]).asBroadcastStream();
+}
+
+class Document {
+  String get visibilityState => 'visible';
+  
+  Stream<dynamic> get onVisibilityChange => 
+      Stream.fromIterable([]).asBroadcastStream();
+}
+
+class History {
+  void pushState(dynamic data, String title, String url) {
+    // No-op for non-web platforms
+  }
+}
+
+class Location {
+  String get href => '';
+}
+
+// Exported instances
+final window = Window();
+final document = Document();

lib/widgets/search_box.dart

@@ -30,7 +30,7 @@ class _SearchBoxState extends State<SearchBox> {
   List<String> _suggestions = [];
   OverlayEntry? _overlayEntry;
   final _layerLink = LayerLink();
-  final bool _isComposing = false;
+  bool _isComposing = false;
 
   @override
   void initState() {
@@ -51,7 +51,10 @@ class _SearchBoxState extends State<SearchBox> {
   }
 
   void _onSearchTextChanged() {
-    if (_focusNode.hasFocus && !_isComposing) {
+    if (_focusNode.hasFocus) {
+      setState(() {
+        _isComposing = widget.controller.text.isNotEmpty;
+      });
       _updateSuggestions();
     }
   }
@@ -154,6 +157,10 @@ class _SearchBoxState extends State<SearchBox> {
       _hideSuggestions();
       FocusScope.of(context).unfocus();
       widget.onSearch(trimmedValue);
+      // Reset _isComposing to ensure the field can be edited again
+      setState(() {
+        _isComposing = false;
+      });
     }
   }
 

lib/widgets/video_player_widget.dart

@@ -3,12 +3,15 @@
 import 'dart:async';
 import 'package:aitube2/config/config.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/foundation.dart' show kDebugMode;
+import 'package:flutter/foundation.dart' show kDebugMode, kIsWeb;
 import 'package:video_player/video_player.dart';
 import '../models/video_result.dart';
 import '../services/clip_queue_manager.dart';
 import '../theme/colors.dart';
 
+// Conditionally import dart:html for web platform
+import 'web_utils.dart' if (dart.library.html) 'dart:html' as html;
+
 class VideoPlayerWidget extends StatefulWidget {
   final VideoResult video;
   final String? initialThumbnailUrl;
@@ -29,7 +32,7 @@ class VideoPlayerWidget extends StatefulWidget {
   State<VideoPlayerWidget> createState() => _VideoPlayerWidgetState();
 }
 
-class _VideoPlayerWidgetState extends State<VideoPlayerWidget> {
+class _VideoPlayerWidgetState extends State<VideoPlayerWidget> with WidgetsBindingObserver {
   late final ClipQueueManager _queueManager;
   VideoPlayerController? _currentController;
   VideoPlayerController? _nextController;
@@ -37,8 +40,8 @@ class _VideoPlayerWidgetState extends State<VideoPlayerWidget> {
   bool _isPlaying = false;
   bool _isLoading = false;
   bool _isInitialLoad = true;
+  bool _wasPlayingBeforeBackground = false;
     
-
   double _loadingProgress = 0.0;
   Timer? _progressTimer;
   Timer? _debugTimer;
@@ -54,9 +57,61 @@ class _VideoPlayerWidgetState extends State<VideoPlayerWidget> {
   @override
   void initState() {
     super.initState();
+    
+    // Register as an observer to detect app lifecycle changes
+    WidgetsBinding.instance.addObserver(this);
+    
+    // Add web-specific visibility change listener
+    if (kIsWeb) {
+      // These handlers only run on web platforms
+      try {
+        // Add document visibility change listener
+        html.document.onVisibilityChange.listen((_) {
+          _handleVisibilityChange();
+        });
+        
+        // Add before unload listener
+        html.window.onBeforeUnload.listen((_) {
+          // Pause video when navigating away from the page
+          _pauseVideo();
+        });
+      } catch (e) {
+        debugPrint('Error setting up web visibility listeners: $e');
+      }
+    }
+    
     _initializePlayer();
     // if (kDebugMode) { _startDebugPrinting(); }
   }
+  
+  void _handleVisibilityChange() {
+    if (!kIsWeb) return;
+    
+    try {
+      final visibilityState = html.window.document.visibilityState;
+      if (visibilityState == 'hidden') {
+        _pauseVideo();
+      } else if (visibilityState == 'visible' && _wasPlayingBeforeBackground) {
+        _resumeVideo();
+      }
+    } catch (e) {
+      debugPrint('Error handling visibility change: $e');
+    }
+  }
+  
+  void _pauseVideo() {
+    if (_isPlaying) {
+      _wasPlayingBeforeBackground = true;
+      _togglePlayback();
+    }
+  }
+  
+  void _resumeVideo() {
+    if (!_isPlaying && _wasPlayingBeforeBackground) {
+      _wasPlayingBeforeBackground = false;
+      _togglePlayback();
+    }
+  }
 
   void _startNextClipCheck() {
     _nextClipCheckTimer?.cancel();
@@ -223,14 +278,34 @@ class _VideoPlayerWidgetState extends State<VideoPlayerWidget> {
     }
   }
 
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    super.didChangeAppLifecycleState(state);
+    
+    // Handle app lifecycle changes for native platforms
+    if (!kIsWeb) {
+      if (state == AppLifecycleState.paused || 
+          state == AppLifecycleState.inactive || 
+          state == AppLifecycleState.detached) {
+        _pauseVideo();
+      } else if (state == AppLifecycleState.resumed && _wasPlayingBeforeBackground) {
+        _resumeVideo();
+      }
+    }
+  }
+
   @override
   void dispose() {
     _isDisposed = true;
+    
+    // Unregister the observer
+    WidgetsBinding.instance.removeObserver(this);
+    
     _currentController?.dispose();
     _nextController?.dispose();
     _progressTimer?.cancel();
     _debugTimer?.cancel();
-   _playbackTimer?.cancel();
+    _playbackTimer?.cancel();
     _nextClipCheckTimer?.cancel();
     _positionTrackingTimer?.cancel();
     _queueManager.dispose();

lib/widgets/web_utils.dart

@@ -0,0 +1,80 @@
+import 'dart:async';
+import 'package:flutter/foundation.dart';
+
+// Platform-specific imports handling
+import 'package:universal_html/html.dart' if (dart.library.io) 'package:aitube2/widgets/null_html.dart' as html;
+
+/// Get URL parameters from the current URL (web only)
+Map<String, String> getUrlParameters() {
+  if (!kIsWeb) return {};
+  
+  final uri = Uri.parse(html.window.location.href);
+  return uri.queryParameters;
+}
+
+/// Update URL parameters without page reload (web only)
+void updateUrlParameter(String key, String value) {
+  if (!kIsWeb) return;
+  
+  final uri = Uri.parse(html.window.location.href);
+  final params = Map<String, String>.from(uri.queryParameters);
+  
+  // Update the parameter
+  params[key] = value;
+  
+  // Create a new URL with updated parameters
+  final newUri = uri.replace(queryParameters: params);
+  
+  // Update browser history without reloading the page
+  html.window.history.pushState(null, '', newUri.toString());
+}
+
+/// Remove a URL parameter without page reload (web only)
+void removeUrlParameter(String key) {
+  if (!kIsWeb) return;
+  
+  final uri = Uri.parse(html.window.location.href);
+  final params = Map<String, String>.from(uri.queryParameters);
+  
+  // Remove the parameter
+  params.remove(key);
+  
+  // Create a new URL with updated parameters
+  final newUri = uri.replace(queryParameters: params);
+  
+  // Update browser history without reloading the page
+  html.window.history.pushState(null, '', newUri.toString());
+}
+
+/// Fallback implementation for non-web platforms
+class NullHtml {
+  // Mock objects to prevent build errors
+  final window = Window();
+  final document = Document();
+}
+
+// Mock implementation for html.window
+class Window {
+  final document = Document();
+  final History history = History();
+  
+  Stream<dynamic> get onBeforeUnload => 
+      Stream.fromIterable([]).asBroadcastStream();
+  
+  String get location => '';
+}
+
+// Mock implementation for html.History
+class History {
+  void pushState(dynamic data, String title, String url) {
+    // No-op for non-web platforms
+  }
+}
+
+// Mock implementation for html.document
+class Document {
+  String get visibilityState => 'visible';
+  
+  Stream<dynamic> get onVisibilityChange => 
+      Stream.fromIterable([]).asBroadcastStream();
+}

pubspec.lock

@@ -25,6 +25,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      sha256: fb0f1107cac15a5ea6ef0a6ef71a807b9e4267c713bb93e00e92d737cc8dbd8a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
   clock:
     dependency: transitive
     description:
@@ -501,6 +509,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  universal_html:
+    dependency: "direct main"
+    description:
+      name: universal_html
+      sha256: "56536254004e24d9d8cfdb7dbbf09b74cf8df96729f38a2f5c238163e3d58971"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.4"
+  universal_io:
+    dependency: transitive
+    description:
+      name: universal_io
+      sha256: "1722b2dcc462b4b2f3ee7d188dad008b6eb4c40bbd03a3de451d82c78bba9aad"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.2"
   url_launcher:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -51,6 +51,7 @@ dependencies:
   idb_shim: ^2.6.1+7
   synchronized: ^3.3.0+3
   async: ^2.11.0
+  universal_html: ^2.2.4
 
 dev_dependencies:
   flutter_test: