better tag search

lib/ui/add_recipe/add_recipe_screen.dart

@@ -583,39 +583,20 @@ class _AddRecipeScreenState extends State<AddRecipeScreen> {
     final tagController = TextEditingController();
     
     try {
+      // Get all existing tags from all recipes
+      final allRecipes = await _recipeService?.getAllRecipes() ?? [];
+      final allTags = <String>{};
+      for (final recipe in allRecipes) {
+        allTags.addAll(recipe.tags);
+      }
+      final existingTags = allTags.toList()..sort();
+      
       final result = await showDialog<String>(
         context: context,
-        builder: (context) => AlertDialog(
-          title: const Text('Add Tag'),
-          content: TextField(
-            controller: tagController,
-            autofocus: true,
-            decoration: const InputDecoration(
-              hintText: 'Enter tag name',
-              border: OutlineInputBorder(),
-            ),
-            textCapitalization: TextCapitalization.none,
-            onSubmitted: (value) {
-              if (value.trim().isNotEmpty) {
-                Navigator.pop(context, value.trim());
-              }
-            },
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.pop(context),
-              child: const Text('Cancel'),
-            ),
-            FilledButton(
-              onPressed: () {
-                final text = tagController.text.trim();
-                if (text.isNotEmpty) {
-                  Navigator.pop(context, text);
-                }
-              },
-              child: const Text('Add'),
-            ),
-          ],
+        builder: (context) => _AddTagDialog(
+          tagController: tagController,
+          existingTags: existingTags,
+          currentTags: _recipe?.tags ?? [],
         ),
       );
 
@@ -1778,6 +1759,233 @@ class _AddRecipeScreenState extends State<AddRecipeScreen> {
   }
 }
 
+/// Dialog for adding tags with existing tags selection
+class _AddTagDialog extends StatefulWidget {
+  final TextEditingController tagController;
+  final List<String> existingTags;
+  final List<String> currentTags;
+
+  const _AddTagDialog({
+    required this.tagController,
+    required this.existingTags,
+    required this.currentTags,
+  });
+
+  @override
+  State<_AddTagDialog> createState() => _AddTagDialogState();
+}
+
+class _AddTagDialogState extends State<_AddTagDialog> with SingleTickerProviderStateMixin {
+  late List<String> _filteredTags;
+  late ScrollController _scrollController;
+  late AnimationController _animationController;
+  late Animation<double> _animation;
+  bool _isUserScrolling = false;
+  DateTime? _lastUserScrollTime;
+
+  @override
+  void initState() {
+    super.initState();
+    _filteredTags = List.from(widget.existingTags);
+    widget.tagController.addListener(_filterTags);
+    
+    _scrollController = ScrollController();
+    
+    _animationController = AnimationController(
+      vsync: this,
+      duration: const Duration(seconds: 8), // Slower animation
+    );
+    
+    _animation = Tween<double>(begin: 0, end: 0.3).animate( // Only scroll 30% of the way
+      CurvedAnimation(parent: _animationController, curve: Curves.easeInOut),
+    );
+    
+    _startAutoScroll();
+    _animation.addListener(_animateScroll);
+  }
+
+  @override
+  void dispose() {
+    widget.tagController.removeListener(_filterTags);
+    _animationController.dispose();
+    _scrollController.dispose();
+    super.dispose();
+  }
+
+
+  void _startAutoScroll() {
+    if (!_isUserScrolling && _filteredTags.length > 3) {
+      _animationController.repeat(reverse: true);
+    }
+  }
+
+  void _animateScroll() {
+    if (!_isUserScrolling && _scrollController.hasClients && _filteredTags.length > 3) {
+      final maxScroll = _scrollController.position.maxScrollExtent;
+      if (maxScroll > 0) {
+        // Only scroll a small amount (30% of max scroll) to suggest scrollability
+        final targetScroll = _animation.value * maxScroll;
+        if ((_scrollController.offset - targetScroll).abs() > 1) {
+          _scrollController.jumpTo(targetScroll);
+        }
+      }
+    }
+  }
+
+  void _filterTags() {
+    final query = widget.tagController.text.toLowerCase();
+    setState(() {
+      if (query.isEmpty) {
+        _filteredTags = List.from(widget.existingTags);
+      } else {
+        _filteredTags = widget.existingTags
+            .where((tag) => tag.toLowerCase().contains(query))
+            .toList();
+      }
+      // Reset scroll position when tags change
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (_scrollController.hasClients) {
+          _scrollController.jumpTo(0);
+          _isUserScrolling = false;
+          _lastUserScrollTime = null;
+          _startAutoScroll();
+        }
+      });
+    });
+  }
+
+  void _selectTag(String tag) {
+    Navigator.pop(context, tag);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final isDark = theme.brightness == Brightness.dark;
+    
+    return AlertDialog(
+      title: const Text('Add Tag'),
+      contentPadding: const EdgeInsets.fromLTRB(24, 20, 24, 24),
+      content: SizedBox(
+        width: MediaQuery.of(context).size.width * 0.95,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            // Search field
+            TextField(
+              controller: widget.tagController,
+              autofocus: true,
+              decoration: InputDecoration(
+                hintText: 'Enter tag name or select from existing',
+                border: const OutlineInputBorder(),
+                prefixIcon: const Icon(Icons.search),
+              ),
+              textCapitalization: TextCapitalization.none,
+              onSubmitted: (value) {
+                if (value.trim().isNotEmpty) {
+                  Navigator.pop(context, value.trim());
+                }
+              },
+            ),
+            const SizedBox(height: 16),
+            // Existing tags scrollable list with fade hint
+            if (_filteredTags.isNotEmpty) ...[
+              Text(
+                'Existing Tags',
+                style: theme.textTheme.titleSmall?.copyWith(
+                  fontWeight: FontWeight.bold,
+                ),
+              ),
+              const SizedBox(height: 8),
+              SizedBox(
+                height: 50,
+                child: NotificationListener<ScrollNotification>(
+                  onNotification: (notification) {
+                    // Detect when user manually scrolls
+                    if (notification is ScrollStartNotification && notification.dragDetails != null) {
+                      _isUserScrolling = true;
+                      _lastUserScrollTime = DateTime.now();
+                      _animationController.stop();
+                    } else if (notification is ScrollEndNotification) {
+                      // Resume auto-scroll after user stops scrolling for 3 seconds
+                      _lastUserScrollTime = DateTime.now();
+                      Future.delayed(const Duration(seconds: 3), () {
+                        if (mounted && _lastUserScrollTime != null) {
+                          final timeSinceLastScroll = DateTime.now().difference(_lastUserScrollTime!);
+                          if (timeSinceLastScroll.inSeconds >= 3) {
+                            setState(() {
+                              _isUserScrolling = false;
+                            });
+                            _startAutoScroll();
+                          }
+                        }
+                      });
+                    }
+                    return false;
+                  },
+                  child: ListView.builder(
+                    controller: _scrollController,
+                    scrollDirection: Axis.horizontal,
+                    itemCount: _filteredTags.length,
+                    itemBuilder: (context, index) {
+                      final tag = _filteredTags[index];
+                      final isAlreadyAdded = widget.currentTags.contains(tag);
+                      return Padding(
+                        padding: const EdgeInsets.only(right: 8),
+                        child: FilterChip(
+                          label: Text(tag),
+                          selected: isAlreadyAdded,
+                          onSelected: isAlreadyAdded
+                              ? null
+                              : (selected) {
+                                  _selectTag(tag);
+                                },
+                          selectedColor: theme.primaryColor,
+                          checkmarkColor: Colors.white,
+                          backgroundColor: isDark 
+                              ? Colors.grey[800] 
+                              : Colors.grey[200],
+                          disabledColor: Colors.grey[400],
+                          labelStyle: TextStyle(
+                            color: isAlreadyAdded
+                                ? Colors.white
+                                : (isDark ? Colors.white : Colors.black87),
+                          ),
+                        ),
+                      );
+                    },
+                  ),
+                ),
+              ),
+            ] else if (widget.tagController.text.isNotEmpty)
+              Text(
+                'No tags found',
+                style: theme.textTheme.bodySmall?.copyWith(
+                  color: isDark ? Colors.grey[400] : Colors.grey[600],
+                ),
+              ),
+          ],
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () => Navigator.pop(context),
+          child: const Text('Cancel'),
+        ),
+        FilledButton(
+          onPressed: () {
+            final text = widget.tagController.text.trim();
+            if (text.isNotEmpty) {
+              Navigator.pop(context, text);
+            }
+          },
+          child: const Text('Add'),
+        ),
+      ],
+    );
+  }
+}
 
 /// Widget that displays a video thumbnail preview with a few seconds of playback.
 class _VideoThumbnailPreview extends StatefulWidget {

lib/ui/recipes/recipes_screen.dart

@@ -39,6 +39,7 @@ class _RecipesScreenState extends State<RecipesScreen> with WidgetsBindingObserv
   final TextEditingController _searchController = TextEditingController();
   bool _isSearching = false;
   DateTime? _lastRefreshTime;
+  Set<String> _selectedTags = {}; // Currently selected tags for filtering
 
   @override
   void initState() {
@@ -108,20 +109,82 @@ class _RecipesScreenState extends State<RecipesScreen> with WidgetsBindingObserv
   void _filterRecipes() {
     final query = _searchController.text.toLowerCase();
     setState(() {
-      if (query.isEmpty) {
+      if (query.isEmpty && _selectedTags.isEmpty) {
         _filteredRecipes = List.from(_recipes);
       } else {
         _filteredRecipes = _recipes.where((recipe) {
-          // Search in title, description, and tags
+          // Tag filter - recipe must contain ALL selected tags
+          if (_selectedTags.isNotEmpty) {
+            if (!_selectedTags.every((tag) => recipe.tags.contains(tag))) {
+              return false;
+            }
+          }
+          
+          // Search filter
+          if (query.isNotEmpty) {
             final titleMatch = recipe.title.toLowerCase().contains(query);
             final descriptionMatch = recipe.description?.toLowerCase().contains(query) ?? false;
             final tagsMatch = recipe.tags.any((tag) => tag.toLowerCase().contains(query));
             return titleMatch || descriptionMatch || tagsMatch;
+          }
+          
+          return true;
         }).toList();
       }
     });
   }
 
+  /// Gets all unique tags from all recipes
+  Set<String> _getAllTags() {
+    final tags = <String>{};
+    for (final recipe in _recipes) {
+      tags.addAll(recipe.tags);
+    }
+    return tags;
+  }
+
+  /// Gets tags from recipes that match the current search query
+  Set<String> _getFilteredTags() {
+    final query = _searchController.text.toLowerCase();
+    final tags = <String>{};
+    
+    // If there's a search query, only get tags from matching recipes
+    if (query.isNotEmpty) {
+      for (final recipe in _recipes) {
+        final titleMatch = recipe.title.toLowerCase().contains(query);
+        final descriptionMatch = recipe.description?.toLowerCase().contains(query) ?? false;
+        final tagsMatch = recipe.tags.any((tag) => tag.toLowerCase().contains(query));
+        
+        if (titleMatch || descriptionMatch || tagsMatch) {
+          tags.addAll(recipe.tags);
+        }
+      }
+    } else {
+      // If no search query, return all tags
+      return _getAllTags();
+    }
+    
+    return tags;
+  }
+
+  /// Handles tag selection for filtering
+  void _selectTag(String tag) {
+    setState(() {
+      if (_selectedTags.contains(tag)) {
+        _selectedTags.remove(tag);
+      } else {
+        _selectedTags.add(tag);
+      }
+      // Automatically activate search form when tags are selected
+      if (_selectedTags.isNotEmpty && !_isSearching) {
+        _isSearching = true;
+      }
+      _filterRecipes();
+    });
+  }
+
+
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
@@ -362,6 +425,7 @@ class _RecipesScreenState extends State<RecipesScreen> with WidgetsBindingObserv
               )
             : const Text('All Recipes'),
         elevation: 0,
+        bottom: _buildTagFilterBar(),
         actions: [
           IconButton(
             icon: Icon(_isSearching ? Icons.close : Icons.search),
@@ -370,10 +434,13 @@ class _RecipesScreenState extends State<RecipesScreen> with WidgetsBindingObserv
                 _isSearching = !_isSearching;
                 if (!_isSearching) {
                   _searchController.clear();
+                  // Clear selected tags when closing search
+                  _selectedTags.clear();
                   _filterRecipes();
                 }
               });
             },
+            tooltip: 'Search',
           ),
           IconButton(
             icon: const Icon(Icons.favorite),
@@ -404,6 +471,59 @@ class _RecipesScreenState extends State<RecipesScreen> with WidgetsBindingObserv
     );
   }
 
+  PreferredSizeWidget _buildTagFilterBar() {
+    final allTags = _getFilteredTags().toList()..sort();
+    final theme = Theme.of(context);
+    final isDark = theme.brightness == Brightness.dark;
+    
+    return PreferredSize(
+      preferredSize: const Size.fromHeight(60),
+      child: Container(
+        color: theme.scaffoldBackgroundColor,
+        padding: const EdgeInsets.symmetric(vertical: 8),
+        height: 60,
+        child: allTags.isEmpty
+            ? Center(
+                child: Text(
+                  'No tags available',
+                  style: theme.textTheme.bodySmall?.copyWith(
+                    color: isDark ? Colors.grey[400] : Colors.grey[600],
+                  ),
+                ),
+              )
+            : ListView.builder(
+                scrollDirection: Axis.horizontal,
+                padding: const EdgeInsets.symmetric(horizontal: 16),
+                itemCount: allTags.length,
+                itemBuilder: (context, index) {
+                  final tag = allTags[index];
+                  final isSelected = _selectedTags.contains(tag);
+                  return Padding(
+                    padding: const EdgeInsets.only(right: 8),
+                    child: FilterChip(
+                      label: Text(tag),
+                      selected: isSelected,
+                      onSelected: (selected) {
+                        _selectTag(tag);
+                      },
+                      selectedColor: theme.primaryColor,
+                      checkmarkColor: Colors.white,
+                      backgroundColor: isDark 
+                          ? Colors.grey[800] 
+                          : Colors.grey[200],
+                      labelStyle: TextStyle(
+                        color: isSelected 
+                            ? Colors.white 
+                            : (isDark ? Colors.white : Colors.black87),
+                      ),
+                    ),
+                  );
+                },
+              ),
+      ),
+    );
+  }
+
   Widget _buildBody() {
     final sessionService = ServiceLocator.instance.sessionService;
     final isLoggedIn = sessionService?.isLoggedIn ?? false;

lib/ui/shared/primary_app_bar.dart

@@ -19,31 +19,74 @@ class PrimaryAppBar extends StatefulWidget implements PreferredSizeWidget {
   Size get preferredSize => const Size.fromHeight(kToolbarHeight);
 }
 
-class _PrimaryAppBarState extends State<PrimaryAppBar> {
+class _PrimaryAppBarState extends State<PrimaryAppBar> with WidgetsBindingObserver {
   Uint8List? _avatarBytes;
   bool _isLoadingAvatar = false;
   String? _lastProfilePictureUrl; // Track URL to avoid reloading
+  String? _lastUserId; // Track user ID to detect user changes
 
   @override
   void initState() {
     super.initState();
+    WidgetsBinding.instance.addObserver(this);
     _loadAvatar();
   }
 
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    super.didChangeAppLifecycleState(state);
+    // Reload avatar when app resumes (in case user changed)
+    if (state == AppLifecycleState.resumed) {
+      _checkAndReloadAvatar();
+    }
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    // Only reload if the profile picture URL has changed
+    _checkAndReloadAvatar();
+  }
+
+  void _checkAndReloadAvatar() {
     final sessionService = ServiceLocator.instance.sessionService;
-    if (sessionService != null && sessionService.isLoggedIn) {
+    if (sessionService == null) {
+      // Clear avatar if no session service
+      if (mounted) {
+        setState(() {
+          _avatarBytes = null;
+          _isLoadingAvatar = false;
+          _lastProfilePictureUrl = null;
+          _lastUserId = null;
+        });
+      }
+      return;
+    }
+
     final currentUser = sessionService.currentUser;
+    final currentUserId = currentUser?.id;
     final profilePictureUrl = currentUser?.nostrProfile?.picture;
+
+    // If user ID changed, clear cache and reload
+    if (currentUserId != _lastUserId) {
+      _lastUserId = currentUserId;
+      _lastProfilePictureUrl = null; // Clear to force reload
+      _avatarBytes = null; // Clear cached avatar
+      _loadAvatar();
+      return;
+    }
+
+    // If profile picture URL changed, reload
     if (profilePictureUrl != _lastProfilePictureUrl) {
       _lastProfilePictureUrl = profilePictureUrl;
       _loadAvatar();
     }
   }
-  }
 
   Future<void> _loadAvatar() async {
     final sessionService = ServiceLocator.instance.sessionService;
@@ -54,6 +97,7 @@ class _PrimaryAppBarState extends State<PrimaryAppBar> {
           _avatarBytes = null;
           _isLoadingAvatar = false;
           _lastProfilePictureUrl = null;
+          _lastUserId = null;
         });
       }
       return;
@@ -66,11 +110,15 @@ class _PrimaryAppBarState extends State<PrimaryAppBar> {
           _avatarBytes = null;
           _isLoadingAvatar = false;
           _lastProfilePictureUrl = null;
+          _lastUserId = null;
         });
       }
       return;
     }
 
+    // Update last user ID
+    _lastUserId = currentUser.id;
+
     final profilePictureUrl = currentUser.nostrProfile?.picture;
     if (profilePictureUrl == null || profilePictureUrl.isEmpty) {
       // Clear avatar if no profile picture