Implement shopping lists tab, community feed with cloning, and cook mode stopwatch with smart timers

mobile/lib/core/api/api_client.dart

@@ -217,7 +217,137 @@ class ApiClient {
     }
   }
 
-  // 7. Logout
+  // 7. Public Recipes (Community Feed)
+  Future<List<Recipe>> getPublicRecipes() async {
+    try {
+      final response = await _dio.get('/api/recipes/public');
+      final list = response.data as List<dynamic>;
+      return list.map((json) => Recipe.fromJson(json as Map<String, dynamic>)).toList();
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to load community recipes');
+    }
+  }
+
+  // 8. Clone Recipe to User's Library
+  Future<Recipe> cloneRecipe(String id) async {
+    try {
+      final response = await _dio.post('/api/recipes/clone/$id');
+      return Recipe.fromJson(response.data as Map<String, dynamic>);
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to clone recipe');
+    }
+  }
+
+  // 9. Shopping Lists
+  Future<List<dynamic>> getShoppingLists() async {
+    try {
+      final response = await _dio.get('/api/shopping-lists');
+      return response.data as List<dynamic>;
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to load shopping lists');
+    }
+  }
+
+  Future<Map<String, dynamic>> createShoppingList(String name) async {
+    try {
+      final response = await _dio.post('/api/shopping-lists', data: {'name': name});
+      return response.data as Map<String, dynamic>;
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to create shopping list');
+    }
+  }
+
+  Future<void> deleteShoppingList(String id) async {
+    try {
+      await _dio.delete('/api/shopping-lists/$id');
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to delete shopping list');
+    }
+  }
+
+  Future<Map<String, dynamic>> addShoppingListItems(
+    String listId,
+    List<String> items, {
+    String? recipeId,
+    String? recipeTitle,
+  }) async {
+    try {
+      final response = await _dio.post(
+        '/api/shopping-lists/$listId/items',
+        data: {
+          'items': items,
+          if (recipeId != null) 'recipeId': recipeId,
+          if (recipeTitle != null) 'recipeTitle': recipeTitle,
+        },
+      );
+      return response.data as Map<String, dynamic>;
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to add items to shopping list');
+    }
+  }
+
+  Future<Map<String, dynamic>> checkShoppingListItems(
+    String listId,
+    List<String> itemIds,
+    bool checked,
+  ) async {
+    try {
+      final response = await _dio.put(
+        '/api/shopping-lists/$listId/items/check',
+        data: {
+          'itemIds': itemIds,
+          'checked': checked,
+        },
+      );
+      return response.data as Map<String, dynamic>;
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to update item check status');
+    }
+  }
+
+  Future<Map<String, dynamic>> deleteShoppingListItems(String listId, List<String> itemIds) async {
+    try {
+      final response = await _dio.post(
+        '/api/shopping-lists/$listId/items/delete',
+        data: {'itemIds': itemIds},
+      );
+      return response.data as Map<String, dynamic>;
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to delete items');
+    }
+  }
+
+  Future<Map<String, dynamic>> clearShoppingList(String listId, {bool onlyChecked = true}) async {
+    try {
+      final response = await _dio.post(
+        '/api/shopping-lists/$listId/clear',
+        data: {'onlyChecked': onlyChecked},
+      );
+      return response.data as Map<String, dynamic>;
+    } on DioException catch (e) {
+      final err = e.error;
+      if (err is ApiException) throw err;
+      throw ApiException(e.message ?? 'Failed to clear shopping list');
+    }
+  }
+
+  // 10. Logout
   Future<void> logout() async {
     try {
       await _dio.post('/api/auth/logout');

mobile/lib/core/models/shopping_list.dart

@@ -0,0 +1,129 @@
+class ShoppingListItem {
+  final String id;
+  final String listId;
+  final String rawText;
+  final String? itemName;
+  final num? quantity;
+  final String? unit;
+  final String? category;
+  final String? recipeId;
+  final String? recipeTitle;
+  final bool checked;
+  final String? createdAt;
+
+  ShoppingListItem({
+    required this.id,
+    required this.listId,
+    required this.rawText,
+    this.itemName,
+    this.quantity,
+    this.unit,
+    this.category,
+    this.recipeId,
+    this.recipeTitle,
+    this.checked = false,
+    this.createdAt,
+  });
+
+  factory ShoppingListItem.fromJson(Map<String, dynamic> json) {
+    num? qty;
+    if (json['quantity'] != null) {
+      if (json['quantity'] is num) {
+        qty = json['quantity'] as num;
+      } else {
+        qty = num.tryParse(json['quantity'].toString());
+      }
+    }
+
+    return ShoppingListItem(
+      id: json['id'] as String,
+      listId: json['listId'] as String? ?? '',
+      rawText: json['rawText'] as String? ?? '',
+      itemName: json['itemName'] as String?,
+      quantity: qty,
+      unit: json['unit'] as String?,
+      category: json['category'] as String?,
+      recipeId: json['recipeId'] as String?,
+      recipeTitle: json['recipeTitle'] as String?,
+      checked: json['checked'] == true || json['checked'] == 1,
+      createdAt: json['createdAt'] as String?,
+    );
+  }
+
+  ShoppingListItem copyWith({
+    String? id,
+    String? listId,
+    String? rawText,
+    String? itemName,
+    num? quantity,
+    String? unit,
+    String? category,
+    String? recipeId,
+    String? recipeTitle,
+    bool? checked,
+    String? createdAt,
+  }) {
+    return ShoppingListItem(
+      id: id ?? this.id,
+      listId: listId ?? this.listId,
+      rawText: rawText ?? this.rawText,
+      itemName: itemName ?? this.itemName,
+      quantity: quantity ?? this.quantity,
+      unit: unit ?? this.unit,
+      category: category ?? this.category,
+      recipeId: recipeId ?? this.recipeId,
+      recipeTitle: recipeTitle ?? this.recipeTitle,
+      checked: checked ?? this.checked,
+      createdAt: createdAt ?? this.createdAt,
+    );
+  }
+}
+
+class ShoppingList {
+  final String id;
+  final String name;
+  final dynamic userId;
+  final String? createdBy;
+  final String? shareToken;
+  final String? createdAt;
+  final String? updatedAt;
+  final int visitorCount;
+  final List<ShoppingListItem> items;
+
+  ShoppingList({
+    required this.id,
+    required this.name,
+    this.userId,
+    this.createdBy,
+    this.shareToken,
+    this.createdAt,
+    this.updatedAt,
+    this.visitorCount = 0,
+    this.items = const [],
+  });
+
+  factory ShoppingList.fromJson(Map<String, dynamic> json) {
+    var rawItems = json['items'];
+    List<ShoppingListItem> parsedItems = [];
+    if (rawItems is List) {
+      parsedItems = rawItems
+          .map((item) => ShoppingListItem.fromJson(item as Map<String, dynamic>))
+          .toList();
+    }
+
+    return ShoppingList(
+      id: json['id'] as String,
+      name: json['name'] as String? ?? 'Shopping List',
+      userId: json['userId'],
+      createdBy: json['createdBy'] as String?,
+      shareToken: json['shareToken'] as String?,
+      createdAt: json['createdAt'] as String?,
+      updatedAt: json['updatedAt'] as String?,
+      visitorCount: (json['visitorCount'] as num?)?.toInt() ?? 0,
+      items: parsedItems,
+    );
+  }
+
+  int get uncheckedCount => items.where((i) => !i.checked).length;
+  int get checkedCount => items.where((i) => i.checked).length;
+}

mobile/lib/core/providers.dart

@@ -1,6 +1,7 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'api/api_client.dart';
 import 'models/recipe.dart';
+import 'models/shopping_list.dart';
 import 'storage/secure_storage_service.dart';
 
 final secureStorageProvider = Provider<SecureStorageService>((ref) {
@@ -133,3 +134,158 @@ final recipeListProvider =
   final api = ref.watch(apiClientProvider);
   return RecipeListNotifier(api);
 });
+
+// Community / Public Recipes State Notifier
+class PublicRecipesNotifier extends StateNotifier<AsyncValue<List<Recipe>>> {
+  final ApiClient _api;
+
+  PublicRecipesNotifier(this._api) : super(const AsyncValue.loading()) {
+    loadPublicRecipes();
+  }
+
+  Future<void> loadPublicRecipes() async {
+    state = const AsyncValue.loading();
+    try {
+      final recipes = await _api.getPublicRecipes();
+      state = AsyncValue.data(recipes);
+    } catch (e, st) {
+      state = AsyncValue.error(e, st);
+    }
+  }
+
+  Future<Recipe> cloneRecipe(String id, WidgetRef? ref) async {
+    final cloned = await _api.cloneRecipe(id);
+    if (ref != null) {
+      ref.read(recipeListProvider.notifier).loadRecipes();
+    }
+    return cloned;
+  }
+}
+
+final publicRecipesProvider =
+    StateNotifierProvider<PublicRecipesNotifier, AsyncValue<List<Recipe>>>((ref) {
+  final api = ref.watch(apiClientProvider);
+  return PublicRecipesNotifier(api);
+});
+
+// Shopping Lists State Notifier
+class ShoppingListsNotifier extends StateNotifier<AsyncValue<List<ShoppingList>>> {
+  final ApiClient _api;
+  String? _activeListId;
+
+  ShoppingListsNotifier(this._api) : super(const AsyncValue.loading()) {
+    loadLists();
+  }
+
+  String? get activeListId => _activeListId;
+
+  void setActiveListId(String id) {
+    _activeListId = id;
+    // Trigger notification if data present
+    if (state.hasValue) {
+      state = AsyncValue.data([...state.value!]);
+    }
+  }
+
+  Future<void> loadLists() async {
+    state = const AsyncValue.loading();
+    try {
+      final data = await _api.getShoppingLists();
+      final lists = data.map((json) => ShoppingList.fromJson(json as Map<String, dynamic>)).toList();
+      if (lists.isNotEmpty && (_activeListId == null || !lists.any((l) => l.id == _activeListId))) {
+        _activeListId = lists.first.id;
+      }
+      state = AsyncValue.data(lists);
+    } catch (e, st) {
+      state = AsyncValue.error(e, st);
+    }
+  }
+
+  Future<void> createList(String name) async {
+    final res = await _api.createShoppingList(name);
+    final created = ShoppingList.fromJson(res);
+    _activeListId = created.id;
+    final current = state.value ?? [];
+    state = AsyncValue.data([...current, created]);
+  }
+
+  Future<void> deleteList(String id) async {
+    await _api.deleteShoppingList(id);
+    final current = (state.value ?? []).where((l) => l.id != id).toList();
+    if (_activeListId == id) {
+      _activeListId = current.isNotEmpty ? current.first.id : null;
+    }
+    state = AsyncValue.data(current);
+  }
+
+  Future<void> toggleItemCheck(String listId, String itemId, bool checked) async {
+    // Optimistic local update
+    final current = state.value ?? [];
+    final listIdx = current.indexWhere((l) => l.id == listId);
+    if (listIdx >= 0) {
+      final list = current[listIdx];
+      final itemIdx = list.items.indexWhere((i) => i.id == itemId);
+      if (itemIdx >= 0) {
+        final updatedItems = [...list.items];
+        updatedItems[itemIdx] = updatedItems[itemIdx].copyWith(checked: checked);
+        current[listIdx] = ShoppingList(
+          id: list.id,
+          name: list.name,
+          userId: list.userId,
+          createdBy: list.createdBy,
+          shareToken: list.shareToken,
+          createdAt: list.createdAt,
+          updatedAt: DateTime.now().toIso8601String(),
+          visitorCount: list.visitorCount,
+          items: updatedItems,
+        );
+        state = AsyncValue.data([...current]);
+      }
+    }
+
+    try {
+      final updatedJson = await _api.checkShoppingListItems(listId, [itemId], checked);
+      final updatedList = ShoppingList.fromJson(updatedJson);
+      _replaceList(updatedList);
+    } catch (e) {
+      // Reload on failure to revert optimistic update
+      loadLists();
+      rethrow;
+    }
+  }
+
+  Future<void> addItems(String listId, List<String> items, {String? recipeId, String? recipeTitle}) async {
+    final updatedJson = await _api.addShoppingListItems(listId, items, recipeId: recipeId, recipeTitle: recipeTitle);
+    final updatedList = ShoppingList.fromJson(updatedJson);
+    _replaceList(updatedList);
+  }
+
+  Future<void> deleteItems(String listId, List<String> itemIds) async {
+    final updatedJson = await _api.deleteShoppingListItems(listId, itemIds);
+    final updatedList = ShoppingList.fromJson(updatedJson);
+    _replaceList(updatedList);
+  }
+
+  Future<void> clearList(String listId, {bool onlyChecked = true}) async {
+    final updatedJson = await _api.clearShoppingList(listId, onlyChecked: onlyChecked);
+    final updatedList = ShoppingList.fromJson(updatedJson);
+    _replaceList(updatedList);
+  }
+
+  void _replaceList(ShoppingList updated) {
+    final current = state.value ?? [];
+    final idx = current.indexWhere((l) => l.id == updated.id);
+    if (idx >= 0) {
+      current[idx] = updated;
+      state = AsyncValue.data([...current]);
+    } else {
+      state = AsyncValue.data([...current, updated]);
+    }
+  }
+}
+
+final shoppingListsProvider =
+    StateNotifierProvider<ShoppingListsNotifier, AsyncValue<List<ShoppingList>>>((ref) {
+  final api = ref.watch(apiClientProvider);
+  return ShoppingListsNotifier(api);
+});

mobile/lib/features/cook_mode/cook_mode_screen.dart

@@ -1,9 +1,17 @@
 import 'dart:async';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:wakelock_plus/wakelock_plus.dart';
 import '../../core/constants/app_theme.dart';
 import '../../core/models/recipe.dart';
 
+class DetectedDuration {
+  final int totalMinutes;
+  final String label;
+
+  DetectedDuration({required this.totalMinutes, required this.label});
+}
+
 class CookModeScreen extends StatefulWidget {
   final Recipe recipe;
 
@@ -18,10 +26,17 @@ class _CookModeScreenState extends State<CookModeScreen> {
   double _scaleMultiplier = 1.0;
   final PageController _pageController = PageController();
 
-  // Simple Timer State
+  // Countdown Timer State
   Timer? _activeTimer;
   int _timerSecondsRemaining = 0;
   bool _isTimerRunning = false;
+  int _currentTimerMinutes = 0;
+
+  // Stopwatch Mode State
+  Timer? _stopwatchTimer;
+  int _stopwatchSeconds = 0;
+  bool _isStopwatchRunning = false;
+  bool _showStopwatch = false;
 
   @override
   void initState() {
@@ -34,13 +49,16 @@ class _CookModeScreenState extends State<CookModeScreen> {
   void dispose() {
     WakelockPlus.disable();
     _activeTimer?.cancel();
+    _stopwatchTimer?.cancel();
     _pageController.dispose();
     super.dispose();
   }
 
   void _startTimer(int minutes) {
     _activeTimer?.cancel();
+    HapticFeedback.mediumImpact();
     setState(() {
+      _currentTimerMinutes = minutes;
       _timerSecondsRemaining = minutes * 60;
       _isTimerRunning = true;
     });
@@ -52,6 +70,7 @@ class _CookModeScreenState extends State<CookModeScreen> {
           _isTimerRunning = false;
           _timerSecondsRemaining = 0;
         });
+        HapticFeedback.vibrate();
         if (mounted) {
           showDialog(
             context: context,
@@ -76,15 +95,163 @@ class _CookModeScreenState extends State<CookModeScreen> {
     });
   }
 
+  void _toggleStopwatch() {
+    HapticFeedback.lightImpact();
+    if (_isStopwatchRunning) {
+      _stopwatchTimer?.cancel();
+      setState(() => _isStopwatchRunning = false);
+    } else {
+      setState(() => _isStopwatchRunning = true);
+      _stopwatchTimer = Timer.periodic(const Duration(seconds: 1), (_) {
+        if (mounted) {
+          setState(() => _stopwatchSeconds++);
+        }
+      });
+    }
+  }
+
+  void _resetStopwatch() {
+    HapticFeedback.lightImpact();
+    _stopwatchTimer?.cancel();
+    setState(() {
+      _isStopwatchRunning = false;
+      _stopwatchSeconds = 0;
+    });
+  }
+
   String _formatTimerTime(int totalSeconds) {
-    final m = totalSeconds ~/ 60;
+    final h = totalSeconds ~/ 3600;
+    final m = (totalSeconds % 3600) ~/ 60;
     final s = totalSeconds % 60;
+    if (h > 0) {
+      return '${h.toString().padLeft(2, '0')}:${m.toString().padLeft(2, '0')}:${s.toString().padLeft(2, '0')}';
+    }
     return '${m.toString().padLeft(2, '0')}:${s.toString().padLeft(2, '0')}';
   }
 
+  List<DetectedDuration> _detectDurationsInStep(String text) {
+    final List<DetectedDuration> results = [];
+    final regex = RegExp(
+      r'(?:for\s+)?(\d+(?:\.\d+)?)\s*(?:-|to)?\s*(\d+(?:\.\d+)?)?\s*(hours?|hrs?|minutes?|mins?|seconds?|secs?)\b',
+      caseSensitive: false,
+    );
+
+    final matches = regex.allMatches(text);
+    for (final match in matches) {
+      final firstNum = match.group(1);
+      final secondNum = match.group(2);
+      final unit = match.group(3)?.toLowerCase() ?? '';
+
+      final numStr = secondNum ?? firstNum;
+      if (numStr == null) continue;
+      final val = double.tryParse(numStr);
+      if (val == null || val <= 0) continue;
+
+      int minutes = 0;
+      if (unit.startsWith('h')) {
+        minutes = (val * 60).round();
+      } else if (unit.startsWith('s')) {
+        minutes = (val / 60).ceil();
+        if (minutes < 1) minutes = 1;
+      } else {
+        minutes = val.round();
+      }
+
+      if (minutes > 0 && !results.any((d) => d.totalMinutes == minutes)) {
+        results.add(DetectedDuration(
+          totalMinutes: minutes,
+          label: '${match.group(0)?.trim()}',
+        ));
+      }
+    }
+    return results;
+  }
+
+  void _showIngredientsSheet() {
+    showModalBottomSheet(
+      context: context,
+      backgroundColor: Colors.transparent,
+      isScrollControlled: true,
+      builder: (ctx) => DraggableScrollableSheet(
+        initialChildSize: 0.65,
+        minChildSize: 0.4,
+        maxChildSize: 0.9,
+        builder: (_, controller) => Container(
+          decoration: const BoxDecoration(
+            color: AppTheme.surfaceElevated,
+            borderRadius: BorderRadius.vertical(top: Radius.circular(24)),
+          ),
+          padding: const EdgeInsets.all(20),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Center(
+                child: Container(
+                  width: 40,
+                  height: 4,
+                  margin: const EdgeInsets.only(bottom: 16),
+                  decoration: BoxDecoration(
+                    color: AppTheme.border,
+                    borderRadius: BorderRadius.circular(2),
+                  ),
+                ),
+              ),
+              Row(
+                children: [
+                  const Icon(Icons.restaurant_menu_rounded, color: AppTheme.primary, size: 22),
+                  const SizedBox(width: 8),
+                  Text(
+                    'Ingredients (${_scaleMultiplier}x)',
+                    style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w700),
+                  ),
+                  const Spacer(),
+                  IconButton(
+                    icon: const Icon(Icons.close, size: 20),
+                    onPressed: () => Navigator.pop(ctx),
+                  ),
+                ],
+              ),
+              const SizedBox(height: 12),
+              Expanded(
+                child: widget.recipe.ingredients.isEmpty
+                    ? const Center(child: Text('No ingredients found.', style: TextStyle(color: AppTheme.textMuted)))
+                    : ListView.separated(
+                        controller: controller,
+                        itemCount: widget.recipe.ingredients.length,
+                        separatorBuilder: (_, __) => const Divider(color: AppTheme.border, height: 1),
+                        itemBuilder: (c, idx) {
+                          return Padding(
+                            padding: const EdgeInsets.symmetric(vertical: 10),
+                            child: Row(
+                              crossAxisAlignment: CrossAxisAlignment.start,
+                              children: [
+                                const Text('• ', style: TextStyle(color: AppTheme.primary, fontSize: 16)),
+                                Expanded(
+                                  child: Text(
+                                    widget.recipe.ingredients[idx],
+                                    style: const TextStyle(fontSize: 15, color: Colors.white, height: 1.3),
+                                  ),
+                                ),
+                              ],
+                            ),
+                          );
+                        },
+                      ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final totalSteps = widget.recipe.instructions.isNotEmpty ? widget.recipe.instructions.length : 1;
+    final currentStepText = (widget.recipe.instructions.isNotEmpty && _currentStepIndex < widget.recipe.instructions.length)
+        ? widget.recipe.instructions[_currentStepIndex]
+        : '';
+    final detectedTimers = _detectDurationsInStep(currentStepText);
 
     return Scaffold(
       backgroundColor: Colors.black,
@@ -92,6 +259,25 @@ class _CookModeScreenState extends State<CookModeScreen> {
         backgroundColor: Colors.black,
         title: Text(widget.recipe.title, maxLines: 1, overflow: TextOverflow.ellipsis),
         actions: [
+          // Ingredients Peek Sheet Button
+          IconButton(
+            tooltip: 'View Ingredients',
+            icon: const Icon(Icons.restaurant_menu_rounded, color: AppTheme.secondary),
+            onPressed: _showIngredientsSheet,
+          ),
+          // Stopwatch Toggle Button
+          IconButton(
+            tooltip: 'Stopwatch',
+            icon: Icon(
+              Icons.timer_outlined,
+              color: _isStopwatchRunning || _showStopwatch ? AppTheme.primary : Colors.white70,
+            ),
+            onPressed: () {
+              setState(() {
+                _showStopwatch = !_showStopwatch;
+              });
+            },
+          ),
           // Scale selector
           PopupMenuButton<double>(
             initialValue: _scaleMultiplier,
@@ -122,13 +308,13 @@ class _CookModeScreenState extends State<CookModeScreen> {
       body: SafeArea(
         child: Column(
           children: [
-            // Top: Active Timer Pill (if active)
+            // Top: Active Countdown Timer Pill (if active)
             if (_isTimerRunning || _timerSecondsRemaining > 0)
               Container(
-                margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
                 padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
                 decoration: BoxDecoration(
-                  color: AppTheme.primary.withOpacity(0.2),
+                  color: AppTheme.primary.withOpacity(0.15),
                   borderRadius: BorderRadius.circular(12),
                   border: Border.all(color: AppTheme.primary),
                 ),
@@ -155,6 +341,43 @@ class _CookModeScreenState extends State<CookModeScreen> {
                 ),
               ),
 
+            // Top: Stopwatch Pill (if shown or running)
+            if (_showStopwatch || _isStopwatchRunning || _stopwatchSeconds > 0)
+              Container(
+                margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
+                padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                decoration: BoxDecoration(
+                  color: AppTheme.surfaceElevated,
+                  borderRadius: BorderRadius.circular(12),
+                  border: Border.all(color: AppTheme.secondary),
+                ),
+                child: Row(
+                  children: [
+                    const Icon(Icons.av_timer_rounded, color: AppTheme.secondary, size: 22),
+                    const SizedBox(width: 10),
+                    Text(
+                      'Stopwatch: ${_formatTimerTime(_stopwatchSeconds)}',
+                      style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w800, color: AppTheme.secondary),
+                    ),
+                    const Spacer(),
+                    IconButton(
+                      visualDensity: VisualDensity.compact,
+                      icon: Icon(
+                        _isStopwatchRunning ? Icons.pause_circle_filled_rounded : Icons.play_circle_fill_rounded,
+                        color: AppTheme.primary,
+                        size: 26,
+                      ),
+                      onPressed: _toggleStopwatch,
+                    ),
+                    IconButton(
+                      visualDensity: VisualDensity.compact,
+                      icon: const Icon(Icons.restart_alt_rounded, color: AppTheme.textMuted, size: 22),
+                      onPressed: _resetStopwatch,
+                    ),
+                  ],
+                ),
+              ),
+
             // Step Progress Bar
             Padding(
               padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
@@ -179,31 +402,66 @@ class _CookModeScreenState extends State<CookModeScreen> {
                       onPageChanged: (i) => setState(() => _currentStepIndex = i),
                       itemBuilder: (ctx, index) {
                         final stepText = widget.recipe.instructions[index];
+                        final stepDurations = _detectDurationsInStep(stepText);
+
                         return Padding(
                           padding: const EdgeInsets.all(24.0),
                           child: Column(
                             crossAxisAlignment: CrossAxisAlignment.start,
                             children: [
-                              Text(
-                                'STEP ${index + 1} OF $totalSteps',
-                                style: const TextStyle(
-                                  color: AppTheme.primary,
-                                  fontSize: 14,
-                                  fontWeight: FontWeight.w800,
-                                  letterSpacing: 1.2,
-                                ),
+                              Row(
+                                children: [
+                                  Text(
+                                    'STEP ${index + 1} OF $totalSteps',
+                                    style: const TextStyle(
+                                      color: AppTheme.primary,
+                                      fontSize: 14,
+                                      fontWeight: FontWeight.w800,
+                                      letterSpacing: 1.2,
+                                    ),
+                                  ),
+                                ],
                               ),
                               const SizedBox(height: 16),
                               Expanded(
                                 child: SingleChildScrollView(
-                                  child: Text(
-                                    stepText,
-                                    style: const TextStyle(
-                                      color: Colors.white,
-                                      fontSize: 22,
-                                      height: 1.5,
-                                      fontWeight: FontWeight.w500,
-                                    ),
+                                  child: Column(
+                                    crossAxisAlignment: CrossAxisAlignment.start,
+                                    children: [
+                                      Text(
+                                        stepText,
+                                        style: const TextStyle(
+                                          color: Colors.white,
+                                          fontSize: 22,
+                                          height: 1.5,
+                                          fontWeight: FontWeight.w500,
+                                        ),
+                                      ),
+                                      // Smart Auto-detected Timers for this step
+                                      if (stepDurations.isNotEmpty) ...[
+                                        const SizedBox(height: 20),
+                                        Wrap(
+                                          spacing: 8,
+                                          runSpacing: 8,
+                                          children: stepDurations.map((d) {
+                                            return ActionChip(
+                                              backgroundColor: AppTheme.primary.withOpacity(0.18),
+                                              side: const BorderSide(color: AppTheme.primary),
+                                              avatar: const Icon(Icons.bolt_rounded, size: 16, color: AppTheme.primary),
+                                              label: Text(
+                                                'Start ${d.totalMinutes}m Timer',
+                                                style: const TextStyle(
+                                                  color: AppTheme.primary,
+                                                  fontWeight: FontWeight.w700,
+                                                  fontSize: 13,
+                                                ),
+                                              ),
+                                              onPressed: () => _startTimer(d.totalMinutes),
+                                            );
+                                          }).toList(),
+                                        ),
+                                      ],
+                                    ],
                                   ),
                                 ),
                               ),

mobile/lib/features/navigation/main_navigation_shell.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+import '../../core/constants/app_theme.dart';
+import '../library/recipes_screen.dart';
+import '../scanner/scanner_screen.dart';
+import '../shopping/shopping_lists_screen.dart';
+
+class MainNavigationShell extends StatefulWidget {
+  const MainNavigationShell({super.key});
+
+  @override
+  State<MainNavigationShell> createState() => _MainNavigationShellState();
+}
+
+class _MainNavigationShellState extends State<MainNavigationShell> {
+  int _currentIndex = 0;
+
+  final List<Widget> _screens = const [
+    RecipesScreen(),
+    ShoppingListsScreen(),
+    ScannerScreen(),
+  ];
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: IndexedStack(
+        index: _currentIndex,
+        children: _screens,
+      ),
+      bottomNavigationBar: Container(
+        decoration: const BoxDecoration(
+          border: Border(
+            top: BorderSide(color: AppTheme.border, width: 1),
+          ),
+        ),
+        child: NavigationBar(
+          selectedIndex: _currentIndex,
+          backgroundColor: AppTheme.surface,
+          indicatorColor: AppTheme.primary.withOpacity(0.2),
+          onDestinationSelected: (idx) {
+            setState(() {
+              _currentIndex = idx;
+            });
+          },
+          destinations: const [
+            NavigationDestination(
+              icon: Icon(Icons.menu_book_outlined),
+              selectedIcon: Icon(Icons.menu_book, color: AppTheme.primary),
+              label: 'Cookbook',
+            ),
+            NavigationDestination(
+              icon: Icon(Icons.shopping_cart_outlined),
+              selectedIcon: Icon(Icons.shopping_cart, color: AppTheme.primary),
+              label: 'Shopping',
+            ),
+            NavigationDestination(
+              icon: Icon(Icons.document_scanner_outlined),
+              selectedIcon: Icon(Icons.document_scanner, color: AppTheme.primary),
+              label: 'Scanner',
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

mobile/lib/features/shopping/shopping_lists_screen.dart

@@ -0,0 +1,491 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../core/constants/app_theme.dart';
+import '../../core/models/shopping_list.dart';
+import '../../core/providers.dart';
+
+class ShoppingListsScreen extends ConsumerStatefulWidget {
+  const ShoppingListsScreen({super.key});
+
+  @override
+  ConsumerState<ShoppingListsScreen> createState() => _ShoppingListsScreenState();
+}
+
+class _ShoppingListsScreenState extends ConsumerState<ShoppingListsScreen> {
+  final TextEditingController _itemInputController = TextEditingController();
+  final FocusNode _itemFocusNode = FocusNode();
+  bool _isAdding = false;
+
+  @override
+  void dispose() {
+    _itemInputController.dispose();
+    _itemFocusNode.dispose();
+    super.dispose();
+  }
+
+  Future<void> _addItem(String listId) async {
+    final text = _itemInputController.text.trim();
+    if (text.isEmpty) return;
+
+    setState(() => _isAdding = true);
+    try {
+      await ref.read(shoppingListsProvider.notifier).addItems(listId, [text]);
+      _itemInputController.clear();
+      HapticFeedback.lightImpact();
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            backgroundColor: AppTheme.danger,
+            content: Text('Failed to add item: $e'),
+          ),
+        );
+      }
+    } finally {
+      if (mounted) {
+        setState(() => _isAdding = false);
+      }
+    }
+  }
+
+  Future<void> _showCreateListDialog() async {
+    final nameController = TextEditingController();
+    final created = await showDialog<bool>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        backgroundColor: AppTheme.surfaceElevated,
+        title: const Text('Create New Shopping List'),
+        content: TextField(
+          controller: nameController,
+          autofocus: true,
+          style: const TextStyle(color: Colors.white),
+          decoration: const InputDecoration(
+            hintText: 'e.g. Costco, Farmers Market',
+            labelText: 'List Name',
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, false),
+            child: const Text('Cancel', style: TextStyle(color: AppTheme.textMuted)),
+          ),
+          ElevatedButton(
+            onPressed: () {
+              if (nameController.text.trim().isNotEmpty) {
+                Navigator.pop(ctx, true);
+              }
+            },
+            child: const Text('Create'),
+          ),
+        ],
+      ),
+    );
+
+    if (created == true && nameController.text.trim().isNotEmpty) {
+      try {
+        await ref.read(shoppingListsProvider.notifier).createList(nameController.text.trim());
+      } catch (e) {
+        if (mounted) {
+          ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(
+              backgroundColor: AppTheme.danger,
+              content: Text('Failed to create list: $e'),
+            ),
+          );
+        }
+      }
+    }
+  }
+
+  Future<void> _confirmDeleteList(ShoppingList list) async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        backgroundColor: AppTheme.surfaceElevated,
+        title: const Text('Delete Shopping List?'),
+        content: Text('Are you sure you want to delete "${list.name}" and all its items?'),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, false),
+            child: const Text('Cancel', style: TextStyle(color: AppTheme.textMuted)),
+          ),
+          ElevatedButton(
+            style: ElevatedButton.styleFrom(backgroundColor: AppTheme.danger),
+            onPressed: () => Navigator.pop(ctx, true),
+            child: const Text('Delete', style: TextStyle(color: Colors.white)),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed == true) {
+      try {
+        await ref.read(shoppingListsProvider.notifier).deleteList(list.id);
+      } catch (e) {
+        if (mounted) {
+          ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(
+              backgroundColor: AppTheme.danger,
+              content: Text('Failed to delete list: $e'),
+            ),
+          );
+        }
+      }
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final listsAsync = ref.watch(shoppingListsProvider);
+
+    return Scaffold(
+      backgroundColor: AppTheme.background,
+      appBar: AppBar(
+        title: const Row(
+          children: [
+            Icon(Icons.shopping_cart_outlined, color: AppTheme.primary, size: 24),
+            SizedBox(width: 8),
+            Text('Shopping Lists', style: TextStyle(fontWeight: FontWeight.w700)),
+          ],
+        ),
+        actions: [
+          IconButton(
+            tooltip: 'New List',
+            icon: const Icon(Icons.playlist_add_rounded),
+            onPressed: _showCreateListDialog,
+          ),
+          IconButton(
+            tooltip: 'Refresh',
+            icon: const Icon(Icons.refresh_rounded),
+            onPressed: () => ref.read(shoppingListsProvider.notifier).loadLists(),
+          ),
+        ],
+      ),
+      body: listsAsync.when(
+        loading: () => const Center(
+          child: CircularProgressIndicator(color: AppTheme.primary),
+        ),
+        error: (err, _) => Center(
+          child: Padding(
+            padding: const EdgeInsets.all(24),
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                const Icon(Icons.error_outline_rounded, size: 48, color: AppTheme.danger),
+                const SizedBox(height: 12),
+                Text('Failed to load shopping lists: $err', textAlign: TextAlign.center),
+                const SizedBox(height: 16),
+                ElevatedButton(
+                  onPressed: () => ref.read(shoppingListsProvider.notifier).loadLists(),
+                  child: const Text('Retry'),
+                ),
+              ],
+            ),
+          ),
+        ),
+        data: (lists) {
+          if (lists.isEmpty) {
+            return Center(
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  const Icon(Icons.shopping_bag_outlined, size: 64, color: AppTheme.textMuted),
+                  const SizedBox(height: 16),
+                  const Text('No shopping lists yet', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+                  const SizedBox(height: 8),
+                  ElevatedButton.icon(
+                    onPressed: _showCreateListDialog,
+                    icon: const Icon(Icons.add),
+                    label: const Text('Create Shopping List'),
+                  ),
+                ],
+              ),
+            );
+          }
+
+          final notifier = ref.read(shoppingListsProvider.notifier);
+          final activeListId = notifier.activeListId ?? lists.first.id;
+          final activeList = lists.firstWhere(
+            (l) => l.id == activeListId,
+            orElse: () => lists.first,
+          );
+
+          final uncheckedItems = activeList.items.where((i) => !i.checked).toList();
+          final checkedItems = activeList.items.where((i) => i.checked).toList();
+
+          return Column(
+            children: [
+              // List Tabs / Selector
+              Container(
+                height: 54,
+                padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                child: ListView.separated(
+                  scrollDirection: Axis.horizontal,
+                  itemCount: lists.length + 1,
+                  separatorBuilder: (_, __) => const SizedBox(width: 8),
+                  itemBuilder: (ctx, idx) {
+                    if (idx == lists.length) {
+                      return ActionChip(
+                        avatar: const Icon(Icons.add, size: 16, color: AppTheme.secondary),
+                        label: const Text('New List', style: TextStyle(color: AppTheme.secondary)),
+                        backgroundColor: AppTheme.surfaceElevated,
+                        side: const BorderSide(color: AppTheme.border),
+                        onPressed: _showCreateListDialog,
+                      );
+                    }
+
+                    final list = lists[idx];
+                    final isSelected = list.id == activeList.id;
+                    return ChoiceChip(
+                      selected: isSelected,
+                      label: Text(
+                        '${list.name} (${list.uncheckedCount})',
+                        style: TextStyle(
+                          color: isSelected ? Colors.black : Colors.white70,
+                          fontWeight: isSelected ? FontWeight.w700 : FontWeight.w500,
+                        ),
+                      ),
+                      selectedColor: AppTheme.primary,
+                      backgroundColor: AppTheme.surfaceElevated,
+                      side: BorderSide(color: isSelected ? AppTheme.primary : AppTheme.border),
+                      onSelected: (_) => notifier.setActiveListId(list.id),
+                    );
+                  },
+                ),
+              ),
+
+              // Active List Toolbar
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
+                child: Row(
+                  children: [
+                    Text(
+                      '${activeList.items.length} items (${activeList.uncheckedCount} left)',
+                      style: const TextStyle(fontSize: 13, color: AppTheme.textMuted),
+                    ),
+                    const Spacer(),
+                    if (checkedItems.isNotEmpty)
+                      TextButton.icon(
+                        style: TextButton.styleFrom(
+                          foregroundColor: AppTheme.secondary,
+                          visualDensity: VisualDensity.compact,
+                        ),
+                        icon: const Icon(Icons.cleaning_services_rounded, size: 16),
+                        label: const Text('Clear Done', style: TextStyle(fontSize: 12)),
+                        onPressed: () {
+                          notifier.clearList(activeList.id, onlyChecked: true);
+                        },
+                      ),
+                    PopupMenuButton<String>(
+                      icon: const Icon(Icons.more_vert, size: 18, color: AppTheme.textMuted),
+                      tooltip: 'List Options',
+                      onSelected: (val) {
+                        if (val == 'clear_all') {
+                          notifier.clearList(activeList.id, onlyChecked: false);
+                        } else if (val == 'delete_list') {
+                          _confirmDeleteList(activeList);
+                        }
+                      },
+                      itemBuilder: (ctx) => [
+                        const PopupMenuItem(
+                          value: 'clear_all',
+                          child: Text('Clear All Items'),
+                        ),
+                        const PopupMenuItem(
+                          value: 'delete_list',
+                          child: Text('Delete List', style: TextStyle(color: AppTheme.danger)),
+                        ),
+                      ],
+                    ),
+                  ],
+                ),
+              ),
+
+              // Quick Add Bar
+              Padding(
+                padding: const EdgeInsets.fromLTRB(16, 4, 16, 12),
+                child: Row(
+                  children: [
+                    Expanded(
+                      child: Container(
+                        decoration: BoxDecoration(
+                          color: AppTheme.surfaceElevated,
+                          borderRadius: BorderRadius.circular(14),
+                          border: Border.all(color: AppTheme.border),
+                        ),
+                        child: TextField(
+                          controller: _itemInputController,
+                          focusNode: _itemFocusNode,
+                          style: const TextStyle(color: Colors.white, fontSize: 14),
+                          decoration: InputDecoration(
+                            hintText: 'Add grocery item (e.g. 2 ripe avocados)...',
+                            hintStyle: const TextStyle(color: AppTheme.textMuted, fontSize: 14),
+                            border: InputBorder.none,
+                            contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+                            suffixIcon: _isAdding
+                                ? const Padding(
+                                    padding: EdgeInsets.all(12),
+                                    child: SizedBox(
+                                      width: 16,
+                                      height: 16,
+                                      child: CircularProgressIndicator(strokeWidth: 2, color: AppTheme.primary),
+                                    ),
+                                  )
+                                : IconButton(
+                                    icon: const Icon(Icons.add_circle, color: AppTheme.primary),
+                                    onPressed: () => _addItem(activeList.id),
+                                  ),
+                          ),
+                          onSubmitted: (_) => _addItem(activeList.id),
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+
+              const Divider(height: 1, color: AppTheme.border),
+
+              // Item List
+              Expanded(
+                child: activeList.items.isEmpty
+                    ? Center(
+                        child: Column(
+                          mainAxisAlignment: MainAxisAlignment.center,
+                          children: [
+                            const Icon(Icons.checklist_rounded, size: 52, color: AppTheme.textMuted),
+                            const SizedBox(height: 12),
+                            const Text('No items on this list yet.', style: TextStyle(color: AppTheme.textMuted)),
+                            const SizedBox(height: 6),
+                            const Text(
+                              'Type an item above or add ingredients from any recipe!',
+                              style: TextStyle(fontSize: 12, color: AppTheme.textMuted),
+                              textAlign: TextAlign.center,
+                            ),
+                          ],
+                        ),
+                      )
+                    : ListView(
+                        padding: const EdgeInsets.symmetric(vertical: 8),
+                        children: [
+                          // Unchecked Items
+                          ...uncheckedItems.map((item) => _buildItemTile(context, activeList, item, false)),
+
+                          // Checked Items
+                          if (checkedItems.isNotEmpty) ...[
+                            Padding(
+                              padding: const EdgeInsets.fromLTRB(16, 16, 16, 8),
+                              child: Row(
+                                children: [
+                                  Text(
+                                    'COMPLETED (${checkedItems.length})',
+                                    style: const TextStyle(
+                                      fontSize: 11,
+                                      fontWeight: FontWeight.w700,
+                                      letterSpacing: 1.2,
+                                      color: AppTheme.textMuted,
+                                    ),
+                                  ),
+                                  const Spacer(),
+                                  InkWell(
+                                    onTap: () => notifier.clearList(activeList.id, onlyChecked: true),
+                                    child: const Text(
+                                      'Clear all',
+                                      style: TextStyle(fontSize: 12, color: AppTheme.secondary),
+                                    ),
+                                  ),
+                                ],
+                              ),
+                            ),
+                            ...checkedItems.map((item) => _buildItemTile(context, activeList, item, true)),
+                          ],
+                        ],
+                      ),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+
+  Widget _buildItemTile(BuildContext context, ShoppingList list, ShoppingListItem item, bool isChecked) {
+    final notifier = ref.read(shoppingListsProvider.notifier);
+
+    return Dismissible(
+      key: Key(item.id),
+      direction: DismissDirection.endToStart,
+      background: Container(
+        color: AppTheme.danger.withOpacity(0.8),
+        alignment: Alignment.centerRight,
+        padding: const EdgeInsets.only(right: 20),
+        child: const Icon(Icons.delete_outline, color: Colors.white),
+      ),
+      onDismissed: (_) {
+        notifier.deleteItems(list.id, [item.id]);
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            backgroundColor: AppTheme.surfaceElevated,
+            content: Text('Removed "${item.rawText}"'),
+            duration: const Duration(seconds: 2),
+          ),
+        );
+      },
+      child: Container(
+        decoration: BoxDecoration(
+          border: Border(bottom: BorderSide(color: AppTheme.border.withOpacity(0.5))),
+        ),
+        child: ListTile(
+          dense: true,
+          contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 2),
+          leading: Transform.scale(
+            scale: 1.15,
+            child: Checkbox(
+              value: item.checked,
+              activeColor: AppTheme.primary,
+              checkColor: Colors.black,
+              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(6)),
+              side: BorderSide(color: isChecked ? AppTheme.primary : AppTheme.textMuted, width: 1.5),
+              onChanged: (bool? val) {
+                HapticFeedback.selectionClick();
+                notifier.toggleItemCheck(list.id, item.id, val ?? false);
+              },
+            ),
+          ),
+          title: Text(
+            item.rawText,
+            style: TextStyle(
+              fontSize: 15,
+              fontWeight: isChecked ? FontWeight.w400 : FontWeight.w600,
+              color: isChecked ? AppTheme.textMuted : Colors.white,
+              decoration: isChecked ? TextDecoration.lineThrough : null,
+              decorationColor: AppTheme.textMuted,
+            ),
+          ),
+          subtitle: item.recipeTitle != null
+              ? Row(
+                  children: [
+                    const Icon(Icons.restaurant_menu, size: 11, color: AppTheme.secondary),
+                    const SizedBox(width: 4),
+                    Expanded(
+                      child: Text(
+                        'Recipe: ${item.recipeTitle}',
+                        style: const TextStyle(fontSize: 11, color: AppTheme.secondary),
+                        overflow: TextOverflow.ellipsis,
+                      ),
+                    ),
+                  ],
+                )
+              : null,
+          trailing: IconButton(
+            icon: const Icon(Icons.close, size: 16, color: AppTheme.textMuted),
+            onPressed: () {
+              notifier.deleteItems(list.id, [item.id]);
+            },
+          ),
+        ),
+      ),
+    );
+  }
+}

mobile/lib/main.dart

@@ -4,7 +4,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'core/constants/app_theme.dart';
 import 'core/providers.dart';
 import 'features/auth/login_screen.dart';
-import 'features/library/recipes_screen.dart';
+import 'features/navigation/main_navigation_shell.dart';
 import 'features/share_receiver/share_receiver_service.dart';
 
 void main() {
@@ -49,7 +49,7 @@ class _ForkFolioAppState extends ConsumerState<ForkFolioApp> {
       title: 'ForkFolio',
       debugShowCheckedModeBanner: false,
       theme: AppTheme.darkTheme,
-      home: authState.isAuthenticated ? const RecipesScreen() : const LoginScreen(),
+      home: authState.isAuthenticated ? const MainNavigationShell() : const LoginScreen(),
     );
   }
 }