fix

.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+    "files.watcherExclude": {
+        "**/.git/objects/**": true,
+        "**/.git/subtree-cache/**": true,
+        "**/.hg/store/**": true,
+        "**/.dart_tool": true,
+        "**/.git/**": true,
+        "**/node_modules/**": true,
+        "**/.vscode/**": true
+    }
+}

claude.md

@@ -64,8 +64,8 @@ You have access to these expert subagents - USE THEM PROACTIVELY:
 ## Flutter Best Practices
 - Use Flutter 3.x features and Material 3 design
 - Implement clean architecture with Riverpod for state management
-- Use Hive CE for local database and offline-first functionality
+- Use Hive CE for local database with **online-first** strategy (API first, cache fallback)
-- Follow proper dependency injection with GetIt
+- Follow proper dependency injection with Riverpod providers
 - Implement proper error handling and user feedback
 - Follow platform-specific design guidelines
 - Use proper localization for multi-language support
@@ -453,7 +453,7 @@ A comprehensive Flutter-based Point of Sale (POS) application designed for retai
 - Supplier state
 
 **Data Requirements**:
-- Product list from Hive (offline-first)
+- Product list from API (online-first with Hive cache fallback)
 - Product images (cached with variants)
 - Product search indexing
 - Category relationships
@@ -969,45 +969,63 @@ GridView.builder(
 - Debounce search queries
 - Optimize cart calculations
 
-## Offline-First Strategy
+## Online-First Strategy
 
 ### Data Flow
-1. **Read**: Always read from Hive first (instant UI)
+1. **Check Connection**: Check if device is online
-2. **Sync**: Background sync with API when online
+2. **Try API First**: If online, fetch fresh data from API
-3. **Update**: Update Hive and UI when sync completes
+3. **Update Cache**: Save API response to Hive for offline access
-4. **Conflict**: Handle conflicts with last-write-wins strategy
+4. **Fallback to Cache**: If API fails or offline, load from Hive
+5. **Show Data**: Display data to user (from API or cache)
 
-### Sync Logic
+### Implementation Pattern
 ```dart
 @riverpod
-class DataSync extends _$DataSync {
+class Products extends _$Products {
   @override
-  Future<SyncStatus> build() async {
+  Future<List<Product>> build() async {
-    return await _performSync();
+    // Online-first: Try to load from API first
+    final repository = ref.watch(productRepositoryProvider);
+    final networkInfo = ref.watch(networkInfoProvider);
+
+    // Check if online
+    final isConnected = await networkInfo.isConnected;
+
+    if (isConnected) {
+      // Try API first
+      try {
+        final syncResult = await repository.syncProducts();
+        return syncResult.fold(
+          (failure) {
+            // API failed, fallback to cache
+            print('API failed, falling back to cache: ${failure.message}');
+            return _loadFromCache();
+          },
+          (products) => products,
+        );
+      } catch (e) {
+        // API error, fallback to cache
+        print('API error, falling back to cache: $e');
+        return _loadFromCache();
+      }
+    } else {
+      // Offline, load from cache
+      print('Offline, loading from cache');
+      return _loadFromCache();
+    }
   }
 
-  Future<SyncStatus> _performSync() async {
+  Future<List<Product>> _loadFromCache() async {
-    if (!await ref.read(networkInfoProvider).isConnected) {
+    final repository = ref.read(productRepositoryProvider);
-      return SyncStatus.offline;
+    final result = await repository.getAllProducts();
-    }
 
-    try {
+    return result.fold(
-      // Sync categories first
+      (failure) {
-      await ref.read(categoriesProvider.notifier).syncCategories();
+        print('Cache load failed: ${failure.message}');
-      
+        return <Product>[];
-      // Then sync products and variants
+      },
-      await ref.read(productsProvider.notifier).syncProducts();
+      (products) => products,
-      
+    );
-      // Sync suppliers
-      await ref.read(suppliersProvider.notifier).syncSuppliers();
-      
-      // Update last sync time
-      await ref.read(settingsProvider.notifier).updateLastSync();
-      
-      return SyncStatus.success;
-    } catch (e) {
-      return SyncStatus.failed;
-    }
   }
 }
 ```
@@ -1134,7 +1152,7 @@ class DataSync extends _$DataSync {
 ### Code Review Checklist
 - [ ] Follows clean architecture principles
 - [ ] Proper error handling implemented
-- [ ] Offline-first approach maintained
+- [ ] **Online-first approach maintained** (API first, cache fallback)
 - [ ] Performance optimizations applied
 - [ ] Proper state management with Riverpod
 - [ ] Hive models and adapters properly defined

devtools_options.yaml

@@ -0,0 +1,3 @@
+description: This file stores settings for Dart & Flutter DevTools.
+documentation: https://docs.flutter.dev/tools/devtools/extensions#configure-extension-enablement-states
+extensions:

ios/Podfile.lock

@@ -31,11 +31,11 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/sqflite_darwin/darwin"
 
 SPEC CHECKSUMS:
-  connectivity_plus: cb623214f4e1f6ef8fe7403d580fdad517d2f7dd
+  connectivity_plus: 2a701ffec2c0ae28a48cf7540e279787e77c447d
   Flutter: cabc95a1d2626b1b06e7179b784ebcf0c0cde467
-  flutter_secure_storage: 1ed9476fba7e7a782b22888f956cce43e2c62f13
+  flutter_secure_storage: d33dac7ae2ea08509be337e775f6b59f1ff45f12
-  path_provider_foundation: 080d55be775b7414fd5a5ef3ac137b97b097e564
+  path_provider_foundation: 2b6b4c569c0fb62ec74538f866245ac84301af46
-  sqflite_darwin: 20b2a3a3b70e43edae938624ce550a3cbf66a3d0
+  sqflite_darwin: 5a7236e3b501866c1c9befc6771dfd73ffb8702d
 
 PODFILE CHECKSUM: 3c63482e143d1b91d2d2560aee9fb04ecc74ac7e
 

lib/app.dart

@@ -1,15 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'core/router/app_router.dart';
 import 'core/theme/app_theme.dart';
-import 'features/auth/presentation/presentation.dart';
+import 'features/auth/presentation/providers/auth_provider.dart';
-import 'features/home/presentation/pages/home_page.dart';
-import 'features/products/presentation/pages/products_page.dart';
-import 'features/categories/presentation/pages/categories_page.dart';
-import 'features/settings/presentation/pages/settings_page.dart';
 import 'features/settings/presentation/providers/theme_provider.dart';
-import 'shared/widgets/app_bottom_nav.dart';
 
-/// Root application widget with authentication wrapper
+/// Root application widget with go_router integration
 class RetailApp extends ConsumerStatefulWidget {
   const RetailApp({super.key});
 
@@ -32,54 +28,15 @@ class _RetailAppState extends ConsumerState<RetailApp> {
   @override
   Widget build(BuildContext context) {
     final themeMode = ref.watch(themeModeFromThemeProvider);
+    final router = ref.watch(routerProvider);
 
-    return MaterialApp(
+    return MaterialApp.router(
       title: 'Retail POS',
       debugShowCheckedModeBanner: false,
-      theme: AppTheme.lightTheme(),
+      theme: AppTheme.lightTheme,
-      darkTheme: AppTheme.darkTheme(),
+      darkTheme: AppTheme.darkTheme,
       themeMode: themeMode,
-      // Wrap the home with AuthWrapper to require login
+      routerConfig: router,
-      home: const AuthWrapper(
-        child: MainScreen(),
-      ),
-    );
-  }
-}
-
-/// Main screen with bottom navigation (only accessible after login)
-class MainScreen extends ConsumerStatefulWidget {
-  const MainScreen({super.key});
-
-  @override
-  ConsumerState<MainScreen> createState() => _MainScreenState();
-}
-
-class _MainScreenState extends ConsumerState<MainScreen> {
-  int _currentIndex = 0;
-
-  final List<Widget> _pages = const [
-    HomePage(),
-    ProductsPage(),
-    CategoriesPage(),
-    SettingsPage(),
-  ];
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      body: IndexedStack(
-        index: _currentIndex,
-        children: _pages,
-      ),
-      bottomNavigationBar: AppBottomNav(
-        currentIndex: _currentIndex,
-        onTap: (index) {
-          setState(() {
-            _currentIndex = index;
-          });
-        },
-      ),
     );
   }
 }

lib/core/constants/app_constants.dart

@@ -23,4 +23,17 @@ class AppConstants {
   static const int minStockThreshold = 5;
   static const int maxCartItemQuantity = 999;
   static const double minTransactionAmount = 0.01;
+
+  // Spacing and Sizes
+  static const double defaultPadding = 16.0;
+  static const double smallPadding = 8.0;
+  static const double largePadding = 24.0;
+  static const double borderRadius = 12.0;
+  static const double buttonHeight = 48.0;
+  static const double textFieldHeight = 56.0;
+
+  // Animation Durations
+  static const Duration shortAnimationDuration = Duration(milliseconds: 200);
+  static const Duration mediumAnimationDuration = Duration(milliseconds: 400);
+  static const Duration longAnimationDuration = Duration(milliseconds: 600);
 }

lib/core/network/dio_client.dart

@@ -1,13 +1,16 @@
 import 'package:dio/dio.dart';
 import '../constants/api_constants.dart';
+import '../storage/secure_storage.dart';
 import 'api_interceptor.dart';
+import 'refresh_token_interceptor.dart';
 
 /// Dio HTTP client configuration
 class DioClient {
   late final Dio _dio;
   String? _authToken;
+  final SecureStorage? secureStorage;
 
-  DioClient() {
+  DioClient({this.secureStorage}) {
     _dio = Dio(
       BaseOptions(
         baseUrl: ApiConstants.fullBaseUrl,
@@ -34,6 +37,17 @@ class DioClient {
         },
       ),
     );
+
+    // Add refresh token interceptor (if secureStorage is provided)
+    if (secureStorage != null) {
+      _dio.interceptors.add(
+        RefreshTokenInterceptor(
+          dio: _dio,
+          secureStorage: secureStorage!,
+        ),
+      );
+      print('🔧 DioClient: Refresh token interceptor added');
+    }
   }
 
   Dio get dio => _dio;

lib/core/network/refresh_token_interceptor.dart

@@ -0,0 +1,104 @@
+import 'package:dio/dio.dart';
+import '../constants/api_constants.dart';
+import '../storage/secure_storage.dart';
+
+/// Interceptor to handle automatic token refresh on 401 errors
+class RefreshTokenInterceptor extends Interceptor {
+  final Dio dio;
+  final SecureStorage secureStorage;
+
+  // To prevent infinite loop of refresh attempts
+  bool _isRefreshing = false;
+
+  RefreshTokenInterceptor({
+    required this.dio,
+    required this.secureStorage,
+  });
+
+  @override
+  void onError(DioException err, ErrorInterceptorHandler handler) async {
+    // Check if error is 401 Unauthorized
+    if (err.response?.statusCode == 401) {
+      print('🔄 Interceptor: Got 401 error, attempting token refresh...');
+
+      // Avoid infinite refresh loop
+      if (_isRefreshing) {
+        print('❌ Interceptor: Already refreshing, skip');
+        return handler.next(err);
+      }
+
+      // Check if this is NOT the refresh token endpoint itself
+      final requestPath = err.requestOptions.path;
+      if (requestPath.contains('refresh')) {
+        print('❌ Interceptor: 401 on refresh endpoint, cannot retry');
+        // Clear tokens as refresh token is invalid
+        await secureStorage.deleteAllTokens();
+        return handler.next(err);
+      }
+
+      try {
+        _isRefreshing = true;
+
+        // Get refresh token from storage
+        final refreshToken = await secureStorage.getRefreshToken();
+        if (refreshToken == null) {
+          print('❌ Interceptor: No refresh token available');
+          await secureStorage.deleteAllTokens();
+          return handler.next(err);
+        }
+
+        print('🔄 Interceptor: Calling refresh token API...');
+
+        // Call refresh token API
+        final response = await dio.post(
+          ApiConstants.refreshToken,
+          data: {'refreshToken': refreshToken},
+          options: Options(
+            headers: {
+              // Don't include auth header for refresh request
+              ApiConstants.authorization: null,
+            },
+          ),
+        );
+
+        if (response.statusCode == 200) {
+          // Extract new tokens from response
+          final responseData = response.data['data'] as Map<String, dynamic>;
+          final newAccessToken = responseData['access_token'] as String;
+          final newRefreshToken = responseData['refresh_token'] as String;
+
+          print('✅ Interceptor: Got new tokens, saving...');
+
+          // Save new tokens
+          await secureStorage.saveAccessToken(newAccessToken);
+          await secureStorage.saveRefreshToken(newRefreshToken);
+
+          // Update the failed request with new token
+          err.requestOptions.headers[ApiConstants.authorization] = 'Bearer $newAccessToken';
+
+          print('🔄 Interceptor: Retrying original request...');
+
+          // Retry the original request
+          final retryResponse = await dio.fetch(err.requestOptions);
+
+          print('✅ Interceptor: Original request succeeded after refresh');
+          _isRefreshing = false;
+          return handler.resolve(retryResponse);
+        } else {
+          print('❌ Interceptor: Refresh token API returned ${response.statusCode}');
+          await secureStorage.deleteAllTokens();
+          _isRefreshing = false;
+          return handler.next(err);
+        }
+      } catch (e) {
+        print('❌ Interceptor: Error during token refresh: $e');
+        await secureStorage.deleteAllTokens();
+        _isRefreshing = false;
+        return handler.next(err);
+      }
+    }
+
+    // Not a 401 error, pass through
+    return handler.next(err);
+  }
+}

lib/core/providers/core_providers.dart

@@ -7,10 +7,12 @@ part 'core_providers.g.dart';
 /// Provider for DioClient (singleton)
 ///
 /// This is the global HTTP client used across the entire app.
-/// It's configured with interceptors, timeout settings, and auth token injection.
+/// It's configured with interceptors, timeout settings, auth token injection,
+/// and automatic token refresh on 401 errors.
 @Riverpod(keepAlive: true)
 DioClient dioClient(Ref ref) {
-  return DioClient();
+  final storage = ref.watch(secureStorageProvider);
+  return DioClient(secureStorage: storage);
 }
 
 /// Provider for SecureStorage (singleton)

lib/core/providers/core_providers.g.dart

@@ -11,7 +11,8 @@ part of 'core_providers.dart';
 /// Provider for DioClient (singleton)
 ///
 /// This is the global HTTP client used across the entire app.
-/// It's configured with interceptors, timeout settings, and auth token injection.
+/// It's configured with interceptors, timeout settings, auth token injection,
+/// and automatic token refresh on 401 errors.
 
 @ProviderFor(dioClient)
 const dioClientProvider = DioClientProvider._();
@@ -19,7 +20,8 @@ const dioClientProvider = DioClientProvider._();
 /// Provider for DioClient (singleton)
 ///
 /// This is the global HTTP client used across the entire app.
-/// It's configured with interceptors, timeout settings, and auth token injection.
+/// It's configured with interceptors, timeout settings, auth token injection,
+/// and automatic token refresh on 401 errors.
 
 final class DioClientProvider
     extends $FunctionalProvider<DioClient, DioClient, DioClient>
@@ -27,7 +29,8 @@ final class DioClientProvider
   /// Provider for DioClient (singleton)
   ///
   /// This is the global HTTP client used across the entire app.
-  /// It's configured with interceptors, timeout settings, and auth token injection.
+  /// It's configured with interceptors, timeout settings, auth token injection,
+  /// and automatic token refresh on 401 errors.
   const DioClientProvider._()
     : super(
         from: null,
@@ -61,7 +64,7 @@ final class DioClientProvider
   }
 }
 
-String _$dioClientHash() => r'895f0dc2f8d5eab562ad65390e5c6d4a1f722b0d';
+String _$dioClientHash() => r'a9edc35e0e918bfa8e6c4e3ecd72412fba383cb2';
 
 /// Provider for SecureStorage (singleton)
 ///

lib/core/providers/dio_client_provider.dart

@@ -1,10 +0,0 @@
-import 'package:riverpod_annotation/riverpod_annotation.dart';
-import '../network/dio_client.dart';
-
-part 'dio_client_provider.g.dart';
-
-/// Provider for DioClient singleton
-@Riverpod(keepAlive: true)
-DioClient dioClient(Ref ref) {
-  return DioClient();
-}

lib/core/providers/dio_client_provider.g.dart

@@ -1,55 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-part of 'dio_client_provider.dart';
-
-// **************************************************************************
-// RiverpodGenerator
-// **************************************************************************
-
-// GENERATED CODE - DO NOT MODIFY BY HAND
-// ignore_for_file: type=lint, type=warning
-/// Provider for DioClient singleton
-
-@ProviderFor(dioClient)
-const dioClientProvider = DioClientProvider._();
-
-/// Provider for DioClient singleton
-
-final class DioClientProvider
-    extends $FunctionalProvider<DioClient, DioClient, DioClient>
-    with $Provider<DioClient> {
-  /// Provider for DioClient singleton
-  const DioClientProvider._()
-    : super(
-        from: null,
-        argument: null,
-        retry: null,
-        name: r'dioClientProvider',
-        isAutoDispose: false,
-        dependencies: null,
-        $allTransitiveDependencies: null,
-      );
-
-  @override
-  String debugGetCreateSourceHash() => _$dioClientHash();
-
-  @$internal
-  @override
-  $ProviderElement<DioClient> $createElement($ProviderPointer pointer) =>
-      $ProviderElement(pointer);
-
-  @override
-  DioClient create(Ref ref) {
-    return dioClient(ref);
-  }
-
-  /// {@macro riverpod.override_with_value}
-  Override overrideWithValue(DioClient value) {
-    return $ProviderOverride(
-      origin: this,
-      providerOverride: $SyncValueProvider<DioClient>(value),
-    );
-  }
-}
-
-String _$dioClientHash() => r'895f0dc2f8d5eab562ad65390e5c6d4a1f722b0d';

lib/core/providers/providers.dart

@@ -2,4 +2,3 @@
 export 'core_providers.dart';
 export 'network_info_provider.dart';
 export 'sync_status_provider.dart';
-export 'dio_client_provider.dart';

lib/core/router/app_router.dart

@@ -0,0 +1,156 @@
+import 'package:go_router/go_router.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+import '../../features/auth/presentation/pages/login_page.dart';
+import '../../features/auth/presentation/pages/register_page.dart';
+import '../../features/auth/presentation/providers/auth_provider.dart';
+import '../../features/auth/presentation/widgets/splash_screen.dart';
+import '../../features/categories/presentation/pages/categories_page.dart';
+import '../../features/categories/presentation/pages/category_detail_page.dart';
+import '../../features/home/presentation/pages/home_page.dart';
+import '../../features/products/presentation/pages/batch_update_page.dart';
+import '../../features/products/presentation/pages/product_detail_page.dart';
+import '../../features/products/presentation/pages/products_page.dart';
+import '../../features/settings/presentation/pages/settings_page.dart';
+import '../../shared/widgets/app_bottom_nav_shell.dart';
+
+part 'app_router.g.dart';
+
+/// Router configuration provider
+@Riverpod(keepAlive: true)
+GoRouter router(Ref ref) {
+  final authState = ref.watch(authProvider);
+
+  return GoRouter(
+    initialLocation: '/',
+    debugLogDiagnostics: true,
+    redirect: (context, state) {
+      final isAuthenticated = authState.isAuthenticated;
+      final isLoading = authState.isLoading && authState.user == null;
+      final isGoingToAuth = state.matchedLocation == '/login' ||
+          state.matchedLocation == '/register';
+
+      // Show splash screen while loading
+      if (isLoading) {
+        return '/splash';
+      }
+
+      // Redirect to login if not authenticated and not already going to auth pages
+      if (!isAuthenticated && !isGoingToAuth && state.matchedLocation != '/splash') {
+        return '/login';
+      }
+
+      // Redirect to home if authenticated and going to auth pages
+      if (isAuthenticated && isGoingToAuth) {
+        return '/';
+      }
+
+      return null;
+    },
+    routes: [
+      // Splash screen
+      GoRoute(
+        path: '/splash',
+        name: 'splash',
+        builder: (context, state) => const SplashScreen(),
+      ),
+
+      // Auth routes
+      GoRoute(
+        path: '/login',
+        name: 'login',
+        builder: (context, state) => const LoginPage(),
+      ),
+      GoRoute(
+        path: '/register',
+        name: 'register',
+        builder: (context, state) => const RegisterPage(),
+      ),
+
+      // Main shell with bottom navigation
+      ShellRoute(
+        builder: (context, state, child) {
+          return AppBottomNavShell(child: child);
+        },
+        routes: [
+          // Home tab
+          GoRoute(
+            path: '/',
+            name: 'home',
+            pageBuilder: (context, state) => NoTransitionPage(
+              key: state.pageKey,
+              child: const HomePage(),
+            ),
+          ),
+
+          // Products tab
+          GoRoute(
+            path: '/products',
+            name: 'products',
+            pageBuilder: (context, state) => NoTransitionPage(
+              key: state.pageKey,
+              child: const ProductsPage(),
+            ),
+            routes: [
+              // Product detail
+              GoRoute(
+                path: ':productId',
+                name: 'product-detail',
+                builder: (context, state) {
+                  final productId = state.pathParameters['productId']!;
+                  return ProductDetailPage(productId: productId);
+                },
+              ),
+              // Batch update
+              GoRoute(
+                path: 'batch-update',
+                name: 'batch-update',
+                builder: (context, state) {
+                  // Get selected products from extra parameter
+                  final selectedProducts = state.extra as List<dynamic>?;
+                  if (selectedProducts == null) {
+                    // If no products provided, return to products page
+                    return const ProductsPage();
+                  }
+                  return BatchUpdatePage(
+                    selectedProducts: selectedProducts.cast(),
+                  );
+                },
+              ),
+            ],
+          ),
+
+          // Categories tab
+          GoRoute(
+            path: '/categories',
+            name: 'categories',
+            pageBuilder: (context, state) => NoTransitionPage(
+              key: state.pageKey,
+              child: const CategoriesPage(),
+            ),
+            routes: [
+              // Category detail
+              GoRoute(
+                path: ':categoryId',
+                name: 'category-detail',
+                builder: (context, state) {
+                  final categoryId = state.pathParameters['categoryId']!;
+                  return CategoryDetailPage(categoryId: categoryId);
+                },
+              ),
+            ],
+          ),
+
+          // Settings tab
+          GoRoute(
+            path: '/settings',
+            name: 'settings',
+            pageBuilder: (context, state) => NoTransitionPage(
+              key: state.pageKey,
+              child: const SettingsPage(),
+            ),
+          ),
+        ],
+      ),
+    ],
+  );
+}

lib/core/router/app_router.g.dart

@@ -0,0 +1,55 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'app_router.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint, type=warning
+/// Router configuration provider
+
+@ProviderFor(router)
+const routerProvider = RouterProvider._();
+
+/// Router configuration provider
+
+final class RouterProvider
+    extends $FunctionalProvider<GoRouter, GoRouter, GoRouter>
+    with $Provider<GoRouter> {
+  /// Router configuration provider
+  const RouterProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'routerProvider',
+        isAutoDispose: false,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$routerHash();
+
+  @$internal
+  @override
+  $ProviderElement<GoRouter> $createElement($ProviderPointer pointer) =>
+      $ProviderElement(pointer);
+
+  @override
+  GoRouter create(Ref ref) {
+    return router(ref);
+  }
+
+  /// {@macro riverpod.override_with_value}
+  Override overrideWithValue(GoRouter value) {
+    return $ProviderOverride(
+      origin: this,
+      providerOverride: $SyncValueProvider<GoRouter>(value),
+    );
+  }
+}
+
+String _$routerHash() => r'3c7108371f8529a70e1e479728e8da132246bab4';

lib/core/theme/app_theme.dart

@@ -1,124 +1,297 @@
 import 'package:flutter/material.dart';
-import 'colors.dart';
+import 'package:flutter/services.dart';
+import '../constants/app_constants.dart';
 
-/// Material 3 theme configuration for the app
+/// Application theme configuration using Material Design 3
 class AppTheme {
   AppTheme._();
 
-  /// Light theme
+  // Color scheme for light theme
-  static ThemeData lightTheme() {
+  static const ColorScheme _lightColorScheme = ColorScheme(
+    brightness: Brightness.light,
+    primary: Color(0xFF1976D2), // Blue
+    onPrimary: Color(0xFFFFFFFF),
+    primaryContainer: Color(0xFFE3F2FD),
+    onPrimaryContainer: Color(0xFF0D47A1),
+    secondary: Color(0xFF757575), // Grey
+    onSecondary: Color(0xFFFFFFFF),
+    secondaryContainer: Color(0xFFE0E0E0),
+    onSecondaryContainer: Color(0xFF424242),
+    tertiary: Color(0xFF4CAF50), // Green
+    onTertiary: Color(0xFFFFFFFF),
+    tertiaryContainer: Color(0xFFE8F5E8),
+    onTertiaryContainer: Color(0xFF2E7D32),
+    error: Color(0xFFD32F2F),
+    onError: Color(0xFFFFFFFF),
+    errorContainer: Color(0xFFFFEBEE),
+    onErrorContainer: Color(0xFFB71C1C),
+    surface: Color(0xFFFFFFFF),
+    onSurface: Color(0xFF212121),
+    surfaceContainerHighest: Color(0xFFF5F5F5),
+    onSurfaceVariant: Color(0xFF616161),
+    outline: Color(0xFFBDBDBD),
+    outlineVariant: Color(0xFFE0E0E0),
+    shadow: Color(0xFF000000),
+    scrim: Color(0xFF000000),
+    inverseSurface: Color(0xFF303030),
+    onInverseSurface: Color(0xFFF5F5F5),
+    inversePrimary: Color(0xFF90CAF9),
+    surfaceTint: Color(0xFF1976D2),
+  );
+
+  // Color scheme for dark theme
+  static const ColorScheme _darkColorScheme = ColorScheme(
+    brightness: Brightness.dark,
+    primary: Color(0xFF90CAF9), // Light Blue
+    onPrimary: Color(0xFF0D47A1),
+    primaryContainer: Color(0xFF1565C0),
+    onPrimaryContainer: Color(0xFFE3F2FD),
+    secondary: Color(0xFFBDBDBD), // Light Grey
+    onSecondary: Color(0xFF424242),
+    secondaryContainer: Color(0xFF616161),
+    onSecondaryContainer: Color(0xFFE0E0E0),
+    tertiary: Color(0xFF81C784), // Light Green
+    onTertiary: Color(0xFF2E7D32),
+    tertiaryContainer: Color(0xFF388E3C),
+    onTertiaryContainer: Color(0xFFE8F5E8),
+    error: Color(0xFFEF5350),
+    onError: Color(0xFFB71C1C),
+    errorContainer: Color(0xFFD32F2F),
+    onErrorContainer: Color(0xFFFFEBEE),
+    surface: Color(0xFF121212),
+    onSurface: Color(0xFFE0E0E0),
+    surfaceContainerHighest: Color(0xFF2C2C2C),
+    onSurfaceVariant: Color(0xFFBDBDBD),
+    outline: Color(0xFF757575),
+    outlineVariant: Color(0xFF424242),
+    shadow: Color(0xFF000000),
+    scrim: Color(0xFF000000),
+    inverseSurface: Color(0xFFE0E0E0),
+    onInverseSurface: Color(0xFF303030),
+    inversePrimary: Color(0xFF1976D2),
+    surfaceTint: Color(0xFF90CAF9),
+  );
+
+  /// Light theme configuration
+  static ThemeData get lightTheme {
     return ThemeData(
       useMaterial3: true,
-      brightness: Brightness.light,
+      colorScheme: _lightColorScheme,
-      colorScheme: ColorScheme.light(
+      scaffoldBackgroundColor: _lightColorScheme.surface,
-        primary: AppColors.primaryLight,
+
-        secondary: AppColors.secondaryLight,
+      // App Bar Theme
-        tertiary: AppColors.tertiaryLight,
+      appBarTheme: AppBarTheme(
-        error: AppColors.errorLight,
-        surface: AppColors.surfaceLight,
-        onPrimary: AppColors.white,
-        onSecondary: AppColors.white,
-        onSurface: AppColors.black,
-        onError: AppColors.white,
-        primaryContainer: AppColors.primaryContainer,
-        secondaryContainer: AppColors.secondaryContainer,
-      ),
-      scaffoldBackgroundColor: AppColors.backgroundLight,
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
         elevation: 0,
-        backgroundColor: AppColors.primaryLight,
+        scrolledUnderElevation: 1,
-        foregroundColor: AppColors.white,
+        backgroundColor: _lightColorScheme.surface,
-      ),
+        foregroundColor: _lightColorScheme.onSurface,
-      cardTheme: CardThemeData(
+        titleTextStyle: TextStyle(
-        elevation: 2,
+          fontSize: 20,
-        shape: RoundedRectangleBorder(
+          fontWeight: FontWeight.w600,
-          borderRadius: BorderRadius.circular(12),
+          color: _lightColorScheme.onSurface,
         ),
+        systemOverlayStyle: SystemUiOverlayStyle.dark,
       ),
+
+      // Elevated Button Theme
       elevatedButtonTheme: ElevatedButtonThemeData(
         style: ElevatedButton.styleFrom(
           elevation: 0,
-          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
+          minimumSize: Size(double.infinity, AppConstants.buttonHeight),
           shape: RoundedRectangleBorder(
-            borderRadius: BorderRadius.circular(8),
+            borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          ),
+          textStyle: const TextStyle(
+            fontSize: 16,
+            fontWeight: FontWeight.w600,
           ),
         ),
       ),
+
+      // Text Button Theme
+      textButtonTheme: TextButtonThemeData(
+        style: TextButton.styleFrom(
+          minimumSize: Size(0, AppConstants.buttonHeight),
+          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          ),
+          textStyle: const TextStyle(
+            fontSize: 16,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+      ),
+
+      // Input Decoration Theme
       inputDecorationTheme: InputDecorationTheme(
         filled: true,
-        fillColor: AppColors.grey100,
+        fillColor: _lightColorScheme.surfaceContainerHighest,
+        contentPadding: EdgeInsets.all(AppConstants.defaultPadding),
         border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
-          borderSide: BorderSide.none,
+          borderSide: BorderSide(color: _lightColorScheme.outline),
         ),
         enabledBorder: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
-          borderSide: BorderSide.none,
+          borderSide: BorderSide(color: _lightColorScheme.outline),
         ),
         focusedBorder: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
-          borderSide: const BorderSide(color: AppColors.primaryLight, width: 2),
+          borderSide: BorderSide(color: _lightColorScheme.primary, width: 2),
         ),
+        errorBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          borderSide: BorderSide(color: _lightColorScheme.error),
+        ),
+        focusedErrorBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          borderSide: BorderSide(color: _lightColorScheme.error, width: 2),
+        ),
+        labelStyle: TextStyle(color: _lightColorScheme.onSurfaceVariant),
+        hintStyle: TextStyle(color: _lightColorScheme.onSurfaceVariant),
+      ),
+
+
+      // List Tile Theme
+      listTileTheme: ListTileThemeData(
+        contentPadding: EdgeInsets.symmetric(
+          horizontal: AppConstants.defaultPadding,
+          vertical: AppConstants.smallPadding,
+        ),
+      ),
+
+      // Divider Theme
+      dividerTheme: DividerThemeData(
+        color: _lightColorScheme.outline,
+        thickness: 0.5,
+      ),
+
+      // Progress Indicator Theme
+      progressIndicatorTheme: ProgressIndicatorThemeData(
+        color: _lightColorScheme.primary,
+      ),
+
+      // Snack Bar Theme
+      snackBarTheme: SnackBarThemeData(
+        backgroundColor: _lightColorScheme.inverseSurface,
+        contentTextStyle: TextStyle(color: _lightColorScheme.onInverseSurface),
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+        ),
+        behavior: SnackBarBehavior.floating,
       ),
     );
   }
 
-  /// Dark theme
+  /// Dark theme configuration
-  static ThemeData darkTheme() {
+  static ThemeData get darkTheme {
     return ThemeData(
       useMaterial3: true,
-      brightness: Brightness.dark,
+      colorScheme: _darkColorScheme,
-      colorScheme: ColorScheme.dark(
+      scaffoldBackgroundColor: _darkColorScheme.surface,
-        primary: AppColors.primaryDark,
+
-        secondary: AppColors.secondaryDark,
+      // App Bar Theme
-        tertiary: AppColors.tertiaryDark,
+      appBarTheme: AppBarTheme(
-        error: AppColors.errorDark,
-        surface: AppColors.surfaceDark,
-        onPrimary: AppColors.black,
-        onSecondary: AppColors.black,
-        onSurface: AppColors.white,
-        onError: AppColors.black,
-        primaryContainer: AppColors.primaryContainer,
-        secondaryContainer: AppColors.secondaryContainer,
-      ),
-      scaffoldBackgroundColor: AppColors.backgroundDark,
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
         elevation: 0,
-        backgroundColor: AppColors.backgroundDark,
+        scrolledUnderElevation: 1,
-        foregroundColor: AppColors.white,
+        backgroundColor: _darkColorScheme.surface,
-      ),
+        foregroundColor: _darkColorScheme.onSurface,
-      cardTheme: CardThemeData(
+        titleTextStyle: TextStyle(
-        elevation: 2,
+          fontSize: 20,
-        shape: RoundedRectangleBorder(
+          fontWeight: FontWeight.w600,
-          borderRadius: BorderRadius.circular(12),
+          color: _darkColorScheme.onSurface,
         ),
+        systemOverlayStyle: SystemUiOverlayStyle.light,
       ),
+
+      // Elevated Button Theme
       elevatedButtonTheme: ElevatedButtonThemeData(
         style: ElevatedButton.styleFrom(
           elevation: 0,
-          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
+          minimumSize: Size(double.infinity, AppConstants.buttonHeight),
           shape: RoundedRectangleBorder(
-            borderRadius: BorderRadius.circular(8),
+            borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          ),
+          textStyle: const TextStyle(
+            fontSize: 16,
+            fontWeight: FontWeight.w600,
           ),
         ),
       ),
+
+      // Text Button Theme
+      textButtonTheme: TextButtonThemeData(
+        style: TextButton.styleFrom(
+          minimumSize: Size(0, AppConstants.buttonHeight),
+          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          ),
+          textStyle: const TextStyle(
+            fontSize: 16,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+      ),
+
+      // Input Decoration Theme
       inputDecorationTheme: InputDecorationTheme(
         filled: true,
-        fillColor: AppColors.grey800,
+        fillColor: _darkColorScheme.surfaceContainerHighest,
+        contentPadding: EdgeInsets.all(AppConstants.defaultPadding),
         border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
-          borderSide: BorderSide.none,
+          borderSide: BorderSide(color: _darkColorScheme.outline),
         ),
         enabledBorder: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
-          borderSide: BorderSide.none,
+          borderSide: BorderSide(color: _darkColorScheme.outline),
         ),
         focusedBorder: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
-          borderSide: const BorderSide(color: AppColors.primaryDark, width: 2),
+          borderSide: BorderSide(color: _darkColorScheme.primary, width: 2),
         ),
+        errorBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          borderSide: BorderSide(color: _darkColorScheme.error),
+        ),
+        focusedErrorBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+          borderSide: BorderSide(color: _darkColorScheme.error, width: 2),
+        ),
+        labelStyle: TextStyle(color: _darkColorScheme.onSurfaceVariant),
+        hintStyle: TextStyle(color: _darkColorScheme.onSurfaceVariant),
+      ),
+
+
+      // List Tile Theme
+      listTileTheme: ListTileThemeData(
+        contentPadding: EdgeInsets.symmetric(
+          horizontal: AppConstants.defaultPadding,
+          vertical: AppConstants.smallPadding,
+        ),
+      ),
+
+      // Divider Theme
+      dividerTheme: DividerThemeData(
+        color: _darkColorScheme.outline,
+        thickness: 0.5,
+      ),
+
+      // Progress Indicator Theme
+      progressIndicatorTheme: ProgressIndicatorThemeData(
+        color: _darkColorScheme.primary,
+      ),
+
+      // Snack Bar Theme
+      snackBarTheme: SnackBarThemeData(
+        backgroundColor: _darkColorScheme.inverseSurface,
+        contentTextStyle: TextStyle(color: _darkColorScheme.onInverseSurface),
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
+        ),
+        behavior: SnackBarBehavior.floating,
       ),
     );
   }

lib/core/widgets/empty_state.dart

@@ -27,7 +27,7 @@ class EmptyState extends StatelessWidget {
           children: [
             Icon(
               icon ?? Icons.inbox_outlined,
-              size: 50,
+              size: 48,
               color: Theme.of(context).colorScheme.outline,
             ),
             const SizedBox(height: 24),

lib/features/auth/data/datasources/auth_remote_datasource.dart

@@ -18,8 +18,8 @@ abstract class AuthRemoteDataSource {
   /// Get current user profile
   Future<UserModel> getProfile();
 
-  /// Refresh access token
+  /// Refresh access token using refresh token
-  Future<AuthResponseModel> refreshToken();
+  Future<AuthResponseModel> refreshToken(String refreshToken);
 }
 
 /// Implementation of AuthRemoteDataSource
@@ -119,21 +119,28 @@ class AuthRemoteDataSourceImpl implements AuthRemoteDataSource {
   }
 
   @override
-  Future<AuthResponseModel> refreshToken() async {
+  Future<AuthResponseModel> refreshToken(String refreshToken) async {
     try {
-      final response = await dioClient.post(ApiConstants.refreshToken);
+      print('📡 DataSource: Calling refresh token API...');
+      final response = await dioClient.post(
+        ApiConstants.refreshToken,
+        data: {'refreshToken': refreshToken},
+      );
 
       if (response.statusCode == ApiConstants.statusOk) {
-        // API returns nested structure: {success, data: {access_token, user}, message}
+        // API returns nested structure: {success, data: {access_token, refresh_token, user}, message}
         // Extract the 'data' object
         final responseData = response.data['data'] as Map<String, dynamic>;
+        print('📡 DataSource: Token refreshed successfully');
         return AuthResponseModel.fromJson(responseData);
       } else {
         throw ServerException('Token refresh failed with status: ${response.statusCode}');
       }
     } on DioException catch (e) {
+      print('❌ DataSource: Refresh token failed - ${e.message}');
       throw _handleDioError(e);
     } catch (e) {
+      print('❌ DataSource: Unexpected error refreshing token: $e');
       throw ServerException('Unexpected error refreshing token: $e');
     }
   }

lib/features/auth/data/models/auth_response_model.dart

@@ -5,6 +5,7 @@ import 'user_model.dart';
 class AuthResponseModel extends AuthResponse {
   const AuthResponseModel({
     required super.accessToken,
+    required super.refreshToken,
     required super.user,
   });
 
@@ -12,6 +13,7 @@ class AuthResponseModel extends AuthResponse {
   factory AuthResponseModel.fromJson(Map<String, dynamic> json) {
     return AuthResponseModel(
       accessToken: json['access_token'] as String,
+      refreshToken: json['refresh_token'] as String,
       user: UserModel.fromJson(json['user'] as Map<String, dynamic>),
     );
   }
@@ -20,6 +22,7 @@ class AuthResponseModel extends AuthResponse {
   Map<String, dynamic> toJson() {
     return {
       'access_token': accessToken,
+      'refresh_token': refreshToken,
       'user': (user as UserModel).toJson(),
     };
   }
@@ -28,6 +31,7 @@ class AuthResponseModel extends AuthResponse {
   factory AuthResponseModel.fromEntity(AuthResponse authResponse) {
     return AuthResponseModel(
       accessToken: authResponse.accessToken,
+      refreshToken: authResponse.refreshToken,
       user: authResponse.user,
     );
   }
@@ -36,6 +40,7 @@ class AuthResponseModel extends AuthResponse {
   AuthResponse toEntity() {
     return AuthResponse(
       accessToken: accessToken,
+      refreshToken: refreshToken,
       user: user,
     );
   }

lib/features/auth/data/repositories/auth_repository_impl.dart

@@ -35,12 +35,13 @@ class AuthRepositoryImpl implements AuthRepository {
 
       print('🔐 Repository: Got response, token length=${authResponse.accessToken.length}');
 
-      // Save token to secure storage only if rememberMe is true
+      // Save tokens to secure storage only if rememberMe is true
       if (rememberMe) {
         await secureStorage.saveAccessToken(authResponse.accessToken);
-        print('🔐 Repository: Token saved to secure storage (persistent)');
+        await secureStorage.saveRefreshToken(authResponse.refreshToken);
+        print('🔐 Repository: Access token and refresh token saved to secure storage (persistent)');
       } else {
-        print('🔐 Repository: Token NOT saved (session only - rememberMe is false)');
+        print('🔐 Repository: Tokens NOT saved (session only - rememberMe is false)');
       }
 
       // Set token in Dio client for subsequent requests (always for current session)
@@ -86,8 +87,9 @@ class AuthRepositoryImpl implements AuthRepository {
       );
       final authResponse = await remoteDataSource.register(registerDto);
 
-      // Save token to secure storage
+      // Save both tokens to secure storage
       await secureStorage.saveAccessToken(authResponse.accessToken);
+      await secureStorage.saveRefreshToken(authResponse.refreshToken);
 
       // Set token in Dio client for subsequent requests
       dioClient.setAuthToken(authResponse.accessToken);
@@ -127,24 +129,44 @@ class AuthRepositoryImpl implements AuthRepository {
   @override
   Future<Either<Failure, AuthResponse>> refreshToken() async {
     try {
-      final authResponse = await remoteDataSource.refreshToken();
+      print('🔄 Repository: Starting token refresh...');
 
-      // Update token in secure storage
+      // Get refresh token from storage
+      final storedRefreshToken = await secureStorage.getRefreshToken();
+      if (storedRefreshToken == null) {
+        print('❌ Repository: No refresh token found in storage');
+        return const Left(UnauthorizedFailure('No refresh token available'));
+      }
+
+      print('🔄 Repository: Calling datasource with refresh token...');
+      final authResponse = await remoteDataSource.refreshToken(storedRefreshToken);
+
+      // Update both tokens in secure storage (token rotation)
       await secureStorage.saveAccessToken(authResponse.accessToken);
+      await secureStorage.saveRefreshToken(authResponse.refreshToken);
+      print('🔄 Repository: New tokens saved to secure storage');
 
       // Update token in Dio client
       dioClient.setAuthToken(authResponse.accessToken);
+      print('🔄 Repository: New access token set in DioClient');
 
       return Right(authResponse);
     } on UnauthorizedException catch (e) {
+      print('❌ Repository: Unauthorized during refresh - ${e.message}');
+      // Clear invalid tokens
+      await secureStorage.deleteAllTokens();
       return Left(UnauthorizedFailure(e.message));
     } on TokenExpiredException catch (e) {
+      print('❌ Repository: Token expired during refresh - ${e.message}');
+      // Clear expired tokens
+      await secureStorage.deleteAllTokens();
       return Left(TokenExpiredFailure(e.message));
     } on NetworkException catch (e) {
       return Left(NetworkFailure(e.message));
     } on ServerException catch (e) {
       return Left(ServerFailure(e.message));
     } catch (e) {
+      print('❌ Repository: Unexpected error during refresh: $e');
       return Left(ServerFailure('Unexpected error: $e'));
     }
   }

lib/features/auth/domain/entities/auth_response.dart

@@ -4,13 +4,15 @@ import 'user.dart';
 /// Authentication response entity
 class AuthResponse extends Equatable {
   final String accessToken;
+  final String refreshToken;
   final User user;
 
   const AuthResponse({
     required this.accessToken,
+    required this.refreshToken,
     required this.user,
   });
 
   @override
-  List<Object?> get props => [accessToken, user];
+  List<Object?> get props => [accessToken, refreshToken, user];
 }

lib/features/auth/presentation/pages/login_page.dart

@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
 import '../providers/auth_provider.dart';
 import '../widgets/widgets.dart';
 import '../utils/validators.dart';
-import 'register_page.dart';
 
 /// Login page with email and password authentication
 class LoginPage extends ConsumerStatefulWidget {
@@ -66,11 +66,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
   }
 
   void _navigateToRegister() {
-    Navigator.of(context).push(
+    context.push('/register');
-      MaterialPageRoute(
-        builder: (context) => const RegisterPage(),
-      ),
-    );
   }
 
   void _handleForgotPassword() {
@@ -164,6 +160,10 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                           // Forgot password link
                           TextButton(
                             onPressed: isLoading ? null : _handleForgotPassword,
+                            style: TextButton.styleFrom(
+                              minimumSize: const Size(0, 0),
+                              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+                            ),
                             child: Text(
                               'Forgot Password?',
                               style: theme.textTheme.bodyMedium?.copyWith(

lib/features/auth/presentation/pages/register_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
 import '../providers/auth_provider.dart';
 import '../widgets/widgets.dart';
 import '../utils/validators.dart';
@@ -90,7 +91,7 @@ class _RegisterPageState extends ConsumerState<RegisterPage> {
   }
 
   void _navigateBackToLogin() {
-    Navigator.of(context).pop();
+    context.pop();
   }
 
   @override

lib/features/auth/presentation/providers/auth_provider.dart

@@ -64,9 +64,9 @@ class AuthState {
 class Auth extends _$Auth {
   @override
   AuthState build() {
-    // Don't call async operations in build
+    // Start with loading state to show splash screen
     // Use a separate method to initialize auth state
-    return const AuthState();
+    return const AuthState(isLoading: true);
   }
 
   AuthRepository get _repository => ref.read(authRepositoryProvider);
@@ -74,7 +74,9 @@ class Auth extends _$Auth {
   /// Initialize auth state - call this on app start
   Future<void> initialize() async {
     print('🚀 Initializing auth state...');
-    state = state.copyWith(isLoading: true);
+
+    // Minimum loading time for smooth UX (prevent flashing)
+    final minimumLoadingTime = Future.delayed(const Duration(milliseconds: 800));
 
     final isAuthenticated = await _repository.isAuthenticated();
     print('🚀 isAuthenticated result: $isAuthenticated');
@@ -83,6 +85,10 @@ class Auth extends _$Auth {
       print('🚀 Token found, fetching user profile...');
       // Get user profile
       final result = await _repository.getProfile();
+
+      // Wait for minimum loading time to complete
+      await minimumLoadingTime;
+
       result.fold(
         (failure) {
           print('❌ Failed to get profile: ${failure.message}');
@@ -103,6 +109,10 @@ class Auth extends _$Auth {
       );
     } else {
       print('❌ No token found, user needs to login');
+
+      // Wait for minimum loading time even when not authenticated
+      await minimumLoadingTime;
+
       state = const AuthState(
         isAuthenticated: false,
         isLoading: false,

lib/features/auth/presentation/providers/auth_provider.g.dart

@@ -142,7 +142,7 @@ final class AuthProvider extends $NotifierProvider<Auth, AuthState> {
   }
 }
 
-String _$authHash() => r'73c9e7b70799eba2904eb6fc65454332d4146a33';
+String _$authHash() => r'24ad5a5313febf1a3ac2550adaf19f34098a8f7c';
 
 /// Auth state notifier provider
 

lib/features/auth/presentation/widgets/auth_wrapper.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../providers/auth_provider.dart';
 import '../pages/login_page.dart';
+import 'splash_screen.dart';
 
 /// Wrapper widget that checks authentication status
 /// Shows login page if not authenticated, otherwise shows child widget
@@ -16,21 +17,27 @@ class AuthWrapper extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final authState = ref.watch(authProvider);
-      print('AuthWrapper build: isAuthenticated=${authState.isAuthenticated}, isLoading=${authState.isLoading}');
+    print('AuthWrapper build: isAuthenticated=${authState.isAuthenticated}, isLoading=${authState.isLoading}');
-    // Show loading indicator while checking auth status
+
+    // Show splash screen while checking auth status
     if (authState.isLoading && authState.user == null) {
-      return const Scaffold(
+      return const SplashScreen();
-        body: Center(
-          child: CircularProgressIndicator(),
-        ),
-      );
     }
 
-    // Show child widget if authenticated, otherwise show login page
+    // Smooth fade transition between screens
-    if (authState.isAuthenticated) {
+    return AnimatedSwitcher(
-      return child;
+      duration: const Duration(milliseconds: 400),
-    } else {
+      switchInCurve: Curves.easeInOut,
-      return const LoginPage();
+      switchOutCurve: Curves.easeInOut,
-    }
+      child: authState.isAuthenticated
+          ? KeyedSubtree(
+              key: const ValueKey('main_app'),
+              child: child,
+            )
+          : const KeyedSubtree(
+              key: ValueKey('login_page'),
+              child: LoginPage(),
+            ),
+    );
   }
 }

lib/features/auth/presentation/widgets/splash_screen.dart

@@ -0,0 +1,135 @@
+import 'package:flutter/material.dart';
+
+/// Splash screen shown while checking authentication status
+class SplashScreen extends StatefulWidget {
+  const SplashScreen({super.key});
+
+  @override
+  State<SplashScreen> createState() => _SplashScreenState();
+}
+
+class _SplashScreenState extends State<SplashScreen>
+    with SingleTickerProviderStateMixin {
+  late AnimationController _controller;
+  late Animation<double> _fadeAnimation;
+  late Animation<double> _scaleAnimation;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      duration: const Duration(milliseconds: 800),
+      vsync: this,
+    );
+
+    _fadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
+      CurvedAnimation(
+        parent: _controller,
+        curve: Curves.easeIn,
+      ),
+    );
+
+    _scaleAnimation = Tween<double>(begin: 0.8, end: 1.0).animate(
+      CurvedAnimation(
+        parent: _controller,
+        curve: Curves.easeOutBack,
+      ),
+    );
+
+    _controller.forward();
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return Scaffold(
+      backgroundColor: theme.colorScheme.primary,
+      body: SafeArea(
+        child: Center(
+          child: FadeTransition(
+            opacity: _fadeAnimation,
+            child: ScaleTransition(
+              scale: _scaleAnimation,
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  // App Icon/Logo
+                  Container(
+                    width: 120,
+                    height: 120,
+                    decoration: BoxDecoration(
+                      color: Colors.white,
+                      borderRadius: BorderRadius.circular(24),
+                      boxShadow: [
+                        BoxShadow(
+                          color: Colors.black.withOpacity(0.2),
+                          blurRadius: 20,
+                          offset: const Offset(0, 10),
+                        ),
+                      ],
+                    ),
+                    child: Icon(
+                      Icons.point_of_sale_rounded,
+                      size: 64,
+                      color: theme.colorScheme.primary,
+                    ),
+                  ),
+                  const SizedBox(height: 32),
+
+                  // App Name
+                  Text(
+                    'Retail POS',
+                    style: theme.textTheme.headlineMedium?.copyWith(
+                      color: Colors.white,
+                      fontWeight: FontWeight.bold,
+                      letterSpacing: 1.2,
+                    ),
+                  ),
+                  const SizedBox(height: 8),
+
+                  // Subtitle
+                  Text(
+                    'Point of Sale System',
+                    style: theme.textTheme.bodyLarge?.copyWith(
+                      color: Colors.white.withOpacity(0.9),
+                      letterSpacing: 0.5,
+                    ),
+                  ),
+                  const SizedBox(height: 48),
+
+                  // Loading Indicator
+                  SizedBox(
+                    width: 40,
+                    height: 40,
+                    child: CircularProgressIndicator(
+                      strokeWidth: 3,
+                      valueColor: AlwaysStoppedAnimation<Color>(
+                        Colors.white.withOpacity(0.9),
+                      ),
+                    ),
+                  ),
+                  const SizedBox(height: 16),
+
+                  // Loading Text
+                  Text(
+                    'Loading...',
+                    style: theme.textTheme.bodyMedium?.copyWith(
+                      color: Colors.white.withOpacity(0.8),
+                    ),
+                  ),
+                ],
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/features/categories/data/datasources/category_local_datasource.dart

@@ -6,6 +6,7 @@ abstract class CategoryLocalDataSource {
   Future<List<CategoryModel>> getAllCategories();
   Future<CategoryModel?> getCategoryById(String id);
   Future<void> cacheCategories(List<CategoryModel> categories);
+  Future<void> updateCategory(CategoryModel category);
   Future<void> clearCategories();
 }
 
@@ -30,6 +31,11 @@ class CategoryLocalDataSourceImpl implements CategoryLocalDataSource {
     await box.putAll(categoryMap);
   }
 
+  @override
+  Future<void> updateCategory(CategoryModel category) async {
+    await box.put(category.id, category);
+  }
+
   @override
   Future<void> clearCategories() async {
     await box.clear();

lib/features/categories/data/models/category_model.dart

@@ -25,10 +25,10 @@ class CategoryModel extends HiveObject {
   final int productCount;
 
   @HiveField(6)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   @HiveField(7)
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   CategoryModel({
     required this.id,
@@ -37,8 +37,8 @@ class CategoryModel extends HiveObject {
     this.iconPath,
     this.color,
     required this.productCount,
-    required this.createdAt,
+    this.createdAt,
-    required this.updatedAt,
+    this.updatedAt,
   });
 
   /// Convert to domain entity
@@ -78,8 +78,12 @@ class CategoryModel extends HiveObject {
       iconPath: json['iconPath'] as String?,
       color: json['color'] as String?,
       productCount: json['productCount'] as int? ?? 0,
-      createdAt: DateTime.parse(json['createdAt'] as String),
+      createdAt: json['createdAt'] != null
-      updatedAt: DateTime.parse(json['updatedAt'] as String),
+          ? DateTime.parse(json['createdAt'] as String)
+          : null,
+      updatedAt: json['updatedAt'] != null
+          ? DateTime.parse(json['updatedAt'] as String)
+          : null,
     );
   }
 
@@ -92,8 +96,8 @@ class CategoryModel extends HiveObject {
       'iconPath': iconPath,
       'color': color,
       'productCount': productCount,
-      'createdAt': createdAt.toIso8601String(),
+      'createdAt': createdAt?.toIso8601String(),
-      'updatedAt': updatedAt.toIso8601String(),
+      'updatedAt': updatedAt?.toIso8601String(),
     };
   }
 

lib/features/categories/data/models/category_model.g.dart

@@ -23,8 +23,8 @@ class CategoryModelAdapter extends TypeAdapter<CategoryModel> {
       iconPath: fields[3] as String?,
       color: fields[4] as String?,
       productCount: (fields[5] as num).toInt(),
-      createdAt: fields[6] as DateTime,
+      createdAt: fields[6] as DateTime?,
-      updatedAt: fields[7] as DateTime,
+      updatedAt: fields[7] as DateTime?,
     );
   }
 

lib/features/categories/data/repositories/category_repository_impl.dart

@@ -18,8 +18,27 @@ class CategoryRepositoryImpl implements CategoryRepository {
   @override
   Future<Either<Failure, List<Category>>> getAllCategories() async {
     try {
-      final categories = await localDataSource.getAllCategories();
+      // Try remote first (online-first)
+      final categories = await remoteDataSource.getAllCategories();
+      // Cache the results
+      await localDataSource.cacheCategories(categories);
       return Right(categories.map((model) => model.toEntity()).toList());
+    } on ServerException catch (e) {
+      // Remote failed, try local cache
+      try {
+        final cachedCategories = await localDataSource.getAllCategories();
+        return Right(cachedCategories.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(ServerFailure('${e.message}. Cache also unavailable.'));
+      }
+    } on NetworkException catch (e) {
+      // Network failed, try local cache
+      try {
+        final cachedCategories = await localDataSource.getAllCategories();
+        return Right(cachedCategories.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(NetworkFailure('${e.message}. Cache also unavailable.'));
+      }
     } on CacheException catch (e) {
       return Left(CacheFailure(e.message));
     }
@@ -28,11 +47,33 @@ class CategoryRepositoryImpl implements CategoryRepository {
   @override
   Future<Either<Failure, Category>> getCategoryById(String id) async {
     try {
-      final category = await localDataSource.getCategoryById(id);
+      // Try remote first (online-first)
-      if (category == null) {
+      final category = await remoteDataSource.getCategoryById(id);
-        return Left(NotFoundFailure('Category not found'));
+      // Cache the result
-      }
+      await localDataSource.updateCategory(category);
       return Right(category.toEntity());
+    } on ServerException catch (e) {
+      // Remote failed, try local cache
+      try {
+        final cachedCategory = await localDataSource.getCategoryById(id);
+        if (cachedCategory == null) {
+          return Left(NotFoundFailure('Category not found in cache'));
+        }
+        return Right(cachedCategory.toEntity());
+      } on CacheException catch (cacheError) {
+        return Left(ServerFailure('${e.message}. Cache also unavailable.'));
+      }
+    } on NetworkException catch (e) {
+      // Network failed, try local cache
+      try {
+        final cachedCategory = await localDataSource.getCategoryById(id);
+        if (cachedCategory == null) {
+          return Left(NotFoundFailure('Category not found in cache'));
+        }
+        return Right(cachedCategory.toEntity());
+      } on CacheException catch (cacheError) {
+        return Left(NetworkFailure('${e.message}. Cache also unavailable.'));
+      }
     } on CacheException catch (e) {
       return Left(CacheFailure(e.message));
     }

lib/features/categories/domain/entities/category.dart

@@ -8,8 +8,8 @@ class Category extends Equatable {
   final String? iconPath;
   final String? color;
   final int productCount;
-  final DateTime createdAt;
+  final DateTime? createdAt;
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   const Category({
     required this.id,
@@ -18,8 +18,8 @@ class Category extends Equatable {
     this.iconPath,
     this.color,
     required this.productCount,
-    required this.createdAt,
+    this.createdAt,
-    required this.updatedAt,
+    this.updatedAt,
   });
 
   @override

lib/features/categories/presentation/pages/category_detail_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../domain/entities/category.dart';
+import '../providers/categories_provider.dart';
 import '../../../products/presentation/providers/products_provider.dart';
 import '../../../products/presentation/widgets/product_card.dart';
 import '../../../products/presentation/widgets/product_list_item.dart';
@@ -10,11 +11,11 @@ enum ViewMode { grid, list }
 
 /// Category detail page showing products in the category
 class CategoryDetailPage extends ConsumerStatefulWidget {
-  final Category category;
+  final String categoryId;
 
   const CategoryDetailPage({
     super.key,
-    required this.category,
+    required this.categoryId,
   });
 
   @override
@@ -26,80 +27,178 @@ class _CategoryDetailPageState extends ConsumerState<CategoryDetailPage> {
 
   @override
   Widget build(BuildContext context) {
+    final categoriesAsync = ref.watch(categoriesProvider);
     final productsAsync = ref.watch(productsProvider);
 
-    return Scaffold(
+    return categoriesAsync.when(
-      appBar: AppBar(
+      data: (categories) {
-        title: Text(widget.category.name),
+        // Find the category by ID
-        actions: [
+        Category? category;
-          // View mode toggle
+        try {
-          IconButton(
+          category = categories.firstWhere((c) => c.id == widget.categoryId);
-            icon: Icon(
+        } catch (e) {
-              _viewMode == ViewMode.grid
+          // Category not found
-                  ? Icons.view_list_rounded
+          category = null;
-                  : Icons.grid_view_rounded,
+        }
-            ),
-            onPressed: () {
-              setState(() {
-                _viewMode =
-                    _viewMode == ViewMode.grid ? ViewMode.list : ViewMode.grid;
-              });
-            },
-            tooltip: _viewMode == ViewMode.grid
-                ? 'Switch to list view'
-                : 'Switch to grid view',
-          ),
-        ],
-      ),
-      body: productsAsync.when(
-        data: (products) {
-          // Filter products by category
-          final categoryProducts = products
-              .where((product) => product.categoryId == widget.category.id)
-              .toList();
 
-          if (categoryProducts.isEmpty) {
+        // Handle category not found
-            return Center(
+        if (category == null) {
+          return Scaffold(
+            appBar: AppBar(
+              title: const Text('Category Not Found'),
+            ),
+            body: Center(
               child: Column(
                 mainAxisAlignment: MainAxisAlignment.center,
                 children: [
                   Icon(
-                    Icons.inventory_2_outlined,
+                    Icons.error_outline,
                     size: 64,
-                    color: Theme.of(context).colorScheme.onSurfaceVariant,
+                    color: Theme.of(context).colorScheme.error,
                   ),
                   const SizedBox(height: 16),
                   Text(
-                    'No products in this category',
+                    'Category not found',
-                    style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                    style: Theme.of(context).textTheme.titleMedium,
-                          color: Theme.of(context).colorScheme.onSurfaceVariant,
-                        ),
                   ),
                   const SizedBox(height: 8),
                   Text(
-                    'Products will appear here once added',
+                    'The category you are looking for does not exist',
-                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                    style: Theme.of(context).textTheme.bodySmall,
-                          color: Theme.of(context).colorScheme.onSurfaceVariant,
+                    textAlign: TextAlign.center,
-                        ),
+                  ),
+                  const SizedBox(height: 16),
+                  FilledButton.icon(
+                    onPressed: () {
+                      Navigator.of(context).pop();
+                    },
+                    icon: const Icon(Icons.arrow_back),
+                    label: const Text('Go Back'),
                   ),
                 ],
               ),
-            );
+            ),
-          }
-
-          return RefreshIndicator(
-            onRefresh: () async {
-              await ref.read(productsProvider.notifier).syncProducts();
-            },
-            child: _viewMode == ViewMode.grid
-                ? _buildGridView(categoryProducts)
-                : _buildListView(categoryProducts),
           );
-        },
+        }
-        loading: () => const Center(
+
+        return Scaffold(
+          appBar: AppBar(
+            title: Text(category.name),
+            actions: [
+              // View mode toggle
+              IconButton(
+                icon: Icon(
+                  _viewMode == ViewMode.grid
+                      ? Icons.view_list_rounded
+                      : Icons.grid_view_rounded,
+                ),
+                onPressed: () {
+                  setState(() {
+                    _viewMode =
+                        _viewMode == ViewMode.grid ? ViewMode.list : ViewMode.grid;
+                  });
+                },
+                tooltip: _viewMode == ViewMode.grid
+                    ? 'Switch to list view'
+                    : 'Switch to grid view',
+              ),
+            ],
+          ),
+          body: productsAsync.when(
+            data: (products) {
+              // Filter products by category
+              final categoryProducts = products
+                  .where((product) => product.categoryId == category!.id)
+                  .toList();
+
+              if (categoryProducts.isEmpty) {
+                return Center(
+                  child: Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      Icon(
+                        Icons.inventory_2_outlined,
+                        size: 64,
+                        color: Theme.of(context).colorScheme.onSurfaceVariant,
+                      ),
+                      const SizedBox(height: 16),
+                      Text(
+                        'No products in this category',
+                        style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                              color: Theme.of(context).colorScheme.onSurfaceVariant,
+                            ),
+                      ),
+                      const SizedBox(height: 8),
+                      Text(
+                        'Products will appear here once added',
+                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                              color: Theme.of(context).colorScheme.onSurfaceVariant,
+                            ),
+                      ),
+                    ],
+                  ),
+                );
+              }
+
+              return RefreshIndicator(
+                onRefresh: () async {
+                  await ref.read(productsProvider.notifier).syncProducts();
+                },
+                child: _viewMode == ViewMode.grid
+                    ? _buildGridView(categoryProducts)
+                    : _buildListView(categoryProducts),
+              );
+            },
+            loading: () => const Center(
+              child: CircularProgressIndicator(),
+            ),
+            error: (error, stack) => Center(
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  Icon(
+                    Icons.error_outline,
+                    size: 64,
+                    color: Theme.of(context).colorScheme.error,
+                  ),
+                  const SizedBox(height: 16),
+                  Text(
+                    'Error loading products',
+                    style: Theme.of(context).textTheme.titleMedium,
+                  ),
+                  const SizedBox(height: 8),
+                  Text(
+                    error.toString(),
+                    style: Theme.of(context).textTheme.bodySmall,
+                    textAlign: TextAlign.center,
+                  ),
+                  const SizedBox(height: 16),
+                  FilledButton.icon(
+                    onPressed: () {
+                      ref.invalidate(productsProvider);
+                    },
+                    icon: const Icon(Icons.refresh),
+                    label: const Text('Retry'),
+                  ),
+                ],
+              ),
+            ),
+          ),
+        );
+      },
+      loading: () => Scaffold(
+        appBar: AppBar(
+          title: const Text('Loading...'),
+        ),
+        body: const Center(
           child: CircularProgressIndicator(),
         ),
-        error: (error, stack) => Center(
+      ),
+      error: (error, stack) => Scaffold(
+        appBar: AppBar(
+          title: const Text('Error'),
+        ),
+        body: Center(
           child: Column(
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
@@ -110,7 +209,7 @@ class _CategoryDetailPageState extends ConsumerState<CategoryDetailPage> {
               ),
               const SizedBox(height: 16),
               Text(
-                'Error loading products',
+                'Error loading category',
                 style: Theme.of(context).textTheme.titleMedium,
               ),
               const SizedBox(height: 8),
@@ -122,7 +221,7 @@ class _CategoryDetailPageState extends ConsumerState<CategoryDetailPage> {
               const SizedBox(height: 16),
               FilledButton.icon(
                 onPressed: () {
-                  ref.invalidate(productsProvider);
+                  ref.invalidate(categoriesProvider);
                 },
                 icon: const Icon(Icons.refresh),
                 label: const Text('Retry'),

lib/features/categories/presentation/providers/categories_provider.dart

@@ -5,12 +5,13 @@ import '../../../../core/providers/providers.dart';
 
 part 'categories_provider.g.dart';
 
-/// Provider for categories list with API-first approach
+/// Provider for categories list with online-first approach
-@riverpod
+/// keepAlive ensures data persists when switching tabs
+@Riverpod(keepAlive: true)
 class Categories extends _$Categories {
   @override
   Future<List<Category>> build() async {
-    // API-first: Try to load from API first
+    // Online-first: Try to load from API first
     final repository = ref.watch(categoryRepositoryProvider);
     final networkInfo = ref.watch(networkInfoProvider);
 
@@ -90,18 +91,3 @@ class Categories extends _$Categories {
     });
   }
 }
-
-/// Provider for selected category
-@riverpod
-class SelectedCategory extends _$SelectedCategory {
-  @override
-  String? build() => null;
-
-  void select(String? categoryId) {
-    state = categoryId;
-  }
-
-  void clear() {
-    state = null;
-  }
-}

lib/features/categories/presentation/providers/categories_provider.g.dart

@@ -8,22 +8,25 @@ part of 'categories_provider.dart';
 
 // GENERATED CODE - DO NOT MODIFY BY HAND
 // ignore_for_file: type=lint, type=warning
-/// Provider for categories list with API-first approach
+/// Provider for categories list with online-first approach
+/// keepAlive ensures data persists when switching tabs
 
 @ProviderFor(Categories)
 const categoriesProvider = CategoriesProvider._();
 
-/// Provider for categories list with API-first approach
+/// Provider for categories list with online-first approach
+/// keepAlive ensures data persists when switching tabs
 final class CategoriesProvider
     extends $AsyncNotifierProvider<Categories, List<Category>> {
-  /// Provider for categories list with API-first approach
+  /// Provider for categories list with online-first approach
+  /// keepAlive ensures data persists when switching tabs
   const CategoriesProvider._()
     : super(
         from: null,
         argument: null,
         retry: null,
         name: r'categoriesProvider',
-        isAutoDispose: true,
+        isAutoDispose: false,
         dependencies: null,
         $allTransitiveDependencies: null,
       );
@@ -36,9 +39,10 @@ final class CategoriesProvider
   Categories create() => Categories();
 }
 
-String _$categoriesHash() => r'33c33b08f8926e5bbbd112285591c74a3ff0f61c';
+String _$categoriesHash() => r'c26eb4b4a76ce796eb65b7843a390805528dec4a';
 
-/// Provider for categories list with API-first approach
+/// Provider for categories list with online-first approach
+/// keepAlive ensures data persists when switching tabs
 
 abstract class _$Categories extends $AsyncNotifier<List<Category>> {
   FutureOr<List<Category>> build();
@@ -58,62 +62,3 @@ abstract class _$Categories extends $AsyncNotifier<List<Category>> {
     element.handleValue(ref, created);
   }
 }
-
-/// Provider for selected category
-
-@ProviderFor(SelectedCategory)
-const selectedCategoryProvider = SelectedCategoryProvider._();
-
-/// Provider for selected category
-final class SelectedCategoryProvider
-    extends $NotifierProvider<SelectedCategory, String?> {
-  /// Provider for selected category
-  const SelectedCategoryProvider._()
-    : super(
-        from: null,
-        argument: null,
-        retry: null,
-        name: r'selectedCategoryProvider',
-        isAutoDispose: true,
-        dependencies: null,
-        $allTransitiveDependencies: null,
-      );
-
-  @override
-  String debugGetCreateSourceHash() => _$selectedCategoryHash();
-
-  @$internal
-  @override
-  SelectedCategory create() => SelectedCategory();
-
-  /// {@macro riverpod.override_with_value}
-  Override overrideWithValue(String? value) {
-    return $ProviderOverride(
-      origin: this,
-      providerOverride: $SyncValueProvider<String?>(value),
-    );
-  }
-}
-
-String _$selectedCategoryHash() => r'a47cd2de07ad285d4b73b2294ba954cb1cdd8e4c';
-
-/// Provider for selected category
-
-abstract class _$SelectedCategory extends $Notifier<String?> {
-  String? build();
-  @$mustCallSuper
-  @override
-  void runBuild() {
-    final created = build();
-    final ref = this.ref as $Ref<String?, String?>;
-    final element =
-        ref.element
-            as $ClassProviderElement<
-              AnyNotifier<String?, String?>,
-              String?,
-              Object?,
-              Object?
-            >;
-    element.handleValue(ref, created);
-  }
-}

lib/features/categories/presentation/widgets/category_card.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import '../../domain/entities/category.dart';
-import '../pages/category_detail_page.dart';
 
 /// Category card widget
 class CategoryCard extends StatelessWidget {
@@ -22,12 +22,7 @@ class CategoryCard extends StatelessWidget {
       child: InkWell(
         onTap: () {
           // Navigate to category detail page
-          Navigator.push(
+          context.push('/categories/${category.id}');
-            context,
-            MaterialPageRoute(
-              builder: (context) => CategoryDetailPage(category: category),
-            ),
-          );
         },
         child: Padding(
           padding: const EdgeInsets.all(16.0),

lib/features/home/presentation/pages/home_page.dart

@@ -1,169 +1,405 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import '../widgets/product_selector.dart';
+import 'package:cached_network_image/cached_network_image.dart';
-import '../widgets/cart_summary.dart';
+import '../../../products/presentation/providers/products_provider.dart';
+import '../../../products/presentation/providers/selected_category_provider.dart';
+import '../../../categories/presentation/providers/categories_provider.dart';
 import '../providers/cart_provider.dart';
+import '../providers/cart_total_provider.dart';
 import '../../domain/entities/cart_item.dart';
+import '../../../../core/widgets/loading_indicator.dart';
+import '../../../../core/widgets/error_widget.dart';
+import '../../../../core/widgets/empty_state.dart';
+import '../../../../core/config/image_cache_config.dart';
+import '../../../../shared/widgets/price_display.dart';
 
-/// Home page - POS interface with product selector and cart
+/// Home page - Quick sale POS interface
-class HomePage extends ConsumerWidget {
+class HomePage extends ConsumerStatefulWidget {
   const HomePage({super.key});
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  ConsumerState<HomePage> createState() => _HomePageState();
+}
+
+class _HomePageState extends ConsumerState<HomePage> {
+  String _searchQuery = '';
+
+  @override
+  Widget build(BuildContext context) {
+    final productsAsync = ref.watch(productsProvider);
+    final categoriesAsync = ref.watch(categoriesProvider);
+    final selectedCategory = ref.watch(selectedCategoryProvider);
     final cartAsync = ref.watch(cartProvider);
-    final isWideScreen = MediaQuery.of(context).size.width > 600;
+    final totalData = ref.watch(cartTotalProvider);
+    final theme = Theme.of(context);
 
-    return Scaffold(
+    final cartItems = cartAsync.value ?? [];
-      appBar: AppBar(
+    final itemCount = cartItems.length;
-        title: const Text('Point of Sale'),
-        actions: [
-          // Cart item count badge
-          cartAsync.whenOrNull(
-            data: (items) => items.isNotEmpty
-                ? Padding(
-                    padding: const EdgeInsets.only(right: 16.0),
-                    child: Center(
-                      child: Badge(
-                        label: Text('${items.length}'),
-                        child: const Icon(Icons.shopping_cart),
-                      ),
-                    ),
-                  )
-                : null,
-          ) ?? const SizedBox.shrink(),
-        ],
-      ),
-      body: isWideScreen
-          ? Row(
-              children: [
-                // Product selector on left
-                Expanded(
-                  flex: 3,
-                  child: ProductSelector(
-                    onProductTap: (product) {
-                      _showAddToCartDialog(context, ref, product);
-                    },
-                  ),
-                ),
-                // Divider
-                const VerticalDivider(width: 1),
-                // Cart on right
-                const Expanded(
-                  flex: 2,
-                  child: CartSummary(),
-                ),
-              ],
-            )
-          : Column(
-              children: [
-                // Product selector on top
-                Expanded(
-                  flex: 2,
-                  child: ProductSelector(
-                    onProductTap: (product) {
-                      _showAddToCartDialog(context, ref, product);
-                    },
-                  ),
-                ),
-                // Divider
-                const Divider(height: 1),
-                // Cart on bottom
-                const Expanded(
-                  flex: 3,
-                  child: CartSummary(),
-                ),
-              ],
-            ),
-    );
-  }
 
-  void _showAddToCartDialog(
+    return SafeArea(
-    BuildContext context,
+      bottom: false,
-    WidgetRef ref,
+      child: Scaffold(
-    dynamic product,
+        backgroundColor: theme.colorScheme.surfaceContainerLowest,
-  ) {
-    int quantity = 1;
 
-    showDialog(
+        body: Column(
-      context: context,
+          children: [
-      builder: (context) => StatefulBuilder(
+            // Search bar
-        builder: (context, setState) => AlertDialog(
+            Container(
-          title: const Text('Add to Cart'),
+              padding: const EdgeInsets.fromLTRB(16, 12, 16, 12),
-          content: Column(
+              color: theme.colorScheme.surface,
-            mainAxisSize: MainAxisSize.min,
+              child: TextField(
-            children: [
+                onChanged: (value) {
-              Text(
+                  setState(() {
-                product.name,
+                    _searchQuery = value;
-                style: Theme.of(context).textTheme.titleMedium,
+                  });
-              ),
+                },
-              const SizedBox(height: 16),
+                decoration: InputDecoration(
-              Row(
+                  hintText: 'Search Menu',
-                mainAxisAlignment: MainAxisAlignment.center,
+                  prefixIcon: const Icon(Icons.search, size: 20),
-                children: [
+                  suffixIcon: _searchQuery.isNotEmpty
-                  IconButton(
+                      ? IconButton(
-                    icon: const Icon(Icons.remove_circle_outline),
+                          icon: const Icon(Icons.clear, size: 20),
-                    onPressed: quantity > 1
+                          onPressed: () {
-                        ? () => setState(() => quantity--)
+                            setState(() {
-                        : null,
+                              _searchQuery = '';
-                  ),
+                            });
-                  Padding(
+                          },
-                    padding: const EdgeInsets.symmetric(horizontal: 16.0),
+                        )
-                    child: Text(
+                      : IconButton(
-                      '$quantity',
+                          icon: const Icon(Icons.tune, size: 20),
-                      style: Theme.of(context).textTheme.headlineSmall,
+                          onPressed: () {
-                    ),
+                            // TODO: Show filters
-                  ),
+                          },
-                  IconButton(
-                    icon: const Icon(Icons.add_circle_outline),
-                    onPressed: quantity < product.stockQuantity
-                        ? () => setState(() => quantity++)
-                        : null,
-                  ),
-                ],
-              ),
-              if (product.stockQuantity < 5)
-                Padding(
-                  padding: const EdgeInsets.only(top: 8.0),
-                  child: Text(
-                    'Only ${product.stockQuantity} in stock',
-                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                          color: Theme.of(context).colorScheme.error,
                         ),
+                  filled: true,
+                  fillColor: theme.colorScheme.surfaceContainerHighest,
+                  contentPadding: const EdgeInsets.symmetric(vertical: 8),
+                  border: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(8),
+                    borderSide: BorderSide(
+                      color: theme.colorScheme.outline.withOpacity(0.3),
+                    ),
+                  ),
+                  enabledBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(8),
+                    borderSide: BorderSide(
+                      color: theme.colorScheme.outline.withOpacity(0.3),
+                    ),
+                  ),
+                  focusedBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(8),
+                    borderSide: BorderSide(
+                      color: theme.colorScheme.primary,
+                      width: 1.5,
+                    ),
                   ),
                 ),
-            ],
+              ),
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.pop(context),
-              child: const Text('Cancel'),
             ),
-            FilledButton.icon(
-              onPressed: () {
-                // Create cart item from product
-                final cartItem = CartItem(
-                  productId: product.id,
-                  productName: product.name,
-                  price: product.price,
-                  quantity: quantity,
-                  imageUrl: product.imageUrl,
-                  addedAt: DateTime.now(),
-                );
 
-                // Add to cart
+            // Category filter buttons
-                ref.read(cartProvider.notifier).addItem(cartItem);
+            categoriesAsync.when(
+              loading: () => const SizedBox.shrink(),
+              error: (_, __) => const SizedBox.shrink(),
+              data: (categories) {
+                if (categories.isEmpty) return const SizedBox.shrink();
 
-                Navigator.pop(context);
+                return Container(
-                ScaffoldMessenger.of(context).showSnackBar(
+                  height: 75,
-                  SnackBar(
+                  padding: const EdgeInsets.symmetric(vertical: 8),
-                    content: Text('Added ${product.name} to cart'),
+                  color: theme.colorScheme.surface,
-                    duration: const Duration(seconds: 2),
+                  child: ListView(
+                    scrollDirection: Axis.horizontal,
+                    padding: const EdgeInsets.symmetric(horizontal: 16),
+                    children: [
+                      // All/Favorite category
+                      _CategoryButton(
+                        icon: Icons.star,
+                        label: 'Favorite',
+                        isSelected: selectedCategory == null,
+                        onTap: () {
+                          ref
+                              .read(selectedCategoryProvider.notifier)
+                              .clearSelection();
+                        },
+                      ),
+                      const SizedBox(width: 12),
+                      // Category buttons
+                      ...categories.map(
+                        (category) => Padding(
+                          padding: const EdgeInsets.only(right: 12.0),
+                          child: _CategoryButton(
+                            icon: _getCategoryIcon(category.name),
+                            label: category.name,
+                            isSelected: selectedCategory == category.id,
+                            onTap: () {
+                              ref
+                                  .read(selectedCategoryProvider.notifier)
+                                  .selectCategory(category.id);
+                            },
+                          ),
+                        ),
+                      ),
+                    ],
                   ),
                 );
               },
-              icon: const Icon(Icons.add_shopping_cart),
+            ),
-              label: const Text('Add'),
+
+            // Products list
+            Expanded(
+              child: productsAsync.when(
+                loading: () => const LoadingIndicator(
+                  message: 'Loading products...',
+                ),
+                error: (error, stack) => ErrorDisplay(
+                  message: error.toString(),
+                  onRetry: () => ref.refresh(productsProvider),
+                ),
+                data: (products) {
+                  // Filter available products
+                  var availableProducts =
+                      products.where((p) => p.isAvailable).toList();
+
+                  // Apply category filter
+                  if (selectedCategory != null) {
+                    availableProducts = availableProducts
+                        .where((p) => p.categoryId == selectedCategory)
+                        .toList();
+                  }
+
+                  // Apply search filter
+                  if (_searchQuery.isNotEmpty) {
+                    availableProducts = availableProducts.where((p) {
+                      final query = _searchQuery.toLowerCase();
+                      return p.name.toLowerCase().contains(query) ||
+                          (p.description?.toLowerCase().contains(query) ?? false);
+                    }).toList();
+                  }
+
+                  if (availableProducts.isEmpty) {
+                    return EmptyState(
+                      message: _searchQuery.isNotEmpty
+                          ? 'No products found'
+                          : 'No products available',
+                      subMessage: _searchQuery.isNotEmpty
+                          ? 'Try a different search term'
+                          : 'Add products to start selling',
+                      icon: Icons.inventory_2_outlined,
+                    );
+                  }
+
+                  return ListView.builder(
+                    padding: const EdgeInsets.all(16),
+                    itemCount: availableProducts.length,
+                    itemBuilder: (context, index) {
+                      final product = availableProducts[index];
+
+                      // Find if product is in cart
+                      final cartItem = cartItems.firstWhere(
+                        (item) => item.productId == product.id,
+                        orElse: () => CartItem(
+                          productId: '',
+                          productName: '',
+                          price: 0,
+                          quantity: 0,
+                          addedAt: DateTime.now(),
+                        ),
+                      );
+                      final isInCart = cartItem.productId.isNotEmpty;
+                      final quantity = isInCart ? cartItem.quantity : 0;
+
+                      return _ProductListItem(
+                        product: product,
+                        quantity: quantity,
+                        onAdd: () => _addToCart(product),
+                        onIncrement: isInCart
+                            ? () => ref
+                                .read(cartProvider.notifier)
+                                .updateQuantity(product.id, quantity + 1)
+                            : null,
+                        onDecrement: isInCart
+                            ? () {
+                                if (quantity > 1) {
+                                  ref
+                                      .read(cartProvider.notifier)
+                                      .updateQuantity(product.id, quantity - 1);
+                                } else {
+                                  ref
+                                      .read(cartProvider.notifier)
+                                      .removeItem(product.id);
+                                }
+                              }
+                            : null,
+                      );
+                    },
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+        // Bottom bar
+        bottomNavigationBar: itemCount > 0
+            ? Container(
+                padding: const EdgeInsets.all(16),
+                decoration: BoxDecoration(
+                  color: theme.colorScheme.surface,
+                  boxShadow: [
+                    BoxShadow(
+                      color: Colors.black.withOpacity(0.05),
+                      blurRadius: 10,
+                      offset: const Offset(0, -2),
+                    ),
+                  ],
+                ),
+                child: SafeArea(
+                  child: FilledButton(
+                    onPressed: () => _proceedToCheckout(),
+                    style: FilledButton.styleFrom(
+                      backgroundColor: theme.colorScheme.primary,
+                      padding: const EdgeInsets.symmetric(vertical: 16),
+                      shape: RoundedRectangleBorder(
+                        borderRadius: BorderRadius.circular(12),
+                      ),
+                    ),
+                    child: Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                      children: [
+                        Row(
+                          children: [
+                            const SizedBox(width: 8),
+                            Text(
+                              'Proceed New Order',
+                              style: theme.textTheme.titleMedium?.copyWith(
+                                color: theme.colorScheme.onPrimary,
+                                fontWeight: FontWeight.bold,
+                              ),
+                            ),
+                          ],
+                        ),
+                        Row(
+                          children: [
+                            Text(
+                              '$itemCount items',
+                              style: theme.textTheme.bodyMedium?.copyWith(
+                                color: theme.colorScheme.onPrimary,
+                              ),
+                            ),
+                            const SizedBox(width: 8),
+                            PriceDisplay(
+                              price: totalData.total,
+                              style: theme.textTheme.titleMedium?.copyWith(
+                                color: theme.colorScheme.onPrimary,
+                                fontWeight: FontWeight.bold,
+                              ),
+                            ),
+                            const SizedBox(width: 8),
+                            const Icon(Icons.arrow_forward, color: Colors.white),
+                          ],
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+              )
+            : null,
+      ),
+    );
+  }
+
+  void _addToCart(dynamic product) {
+    final cartItem = CartItem(
+      productId: product.id,
+      productName: product.name,
+      price: product.price,
+      quantity: 1,
+      imageUrl: product.imageUrl,
+      addedAt: DateTime.now(),
+    );
+
+    ref.read(cartProvider.notifier).addItem(cartItem);
+  }
+
+  void _proceedToCheckout() {
+    // TODO: Navigate to checkout/order detail screen
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text('Proceeding to checkout...'),
+        duration: Duration(seconds: 2),
+      ),
+    );
+  }
+
+  IconData _getCategoryIcon(String categoryName) {
+    final name = categoryName.toLowerCase();
+    if (name.contains('drink') || name.contains('beverage')) {
+      return Icons.local_cafe;
+    } else if (name.contains('food') || name.contains('meal')) {
+      return Icons.restaurant;
+    } else if (name.contains('dessert') || name.contains('sweet')) {
+      return Icons.cake;
+    } else {
+      return Icons.category;
+    }
+  }
+}
+
+/// Category filter button
+class _CategoryButton extends StatelessWidget {
+  final IconData icon;
+  final String label;
+  final bool isSelected;
+  final VoidCallback onTap;
+
+  const _CategoryButton({
+    required this.icon,
+    required this.label,
+    required this.isSelected,
+    required this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return InkWell(
+      onTap: onTap,
+      borderRadius: BorderRadius.circular(12),
+      child: Container(
+        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+        decoration: BoxDecoration(
+          color: isSelected
+              ? theme.colorScheme.primaryContainer
+              : theme.colorScheme.surfaceContainerHighest,
+          borderRadius: BorderRadius.circular(12),
+          border: Border.all(
+            color: isSelected
+                ? theme.colorScheme.primary
+                : Colors.transparent,
+            width: 1.5,
+          ),
+        ),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Icon(
+              icon,
+              color: isSelected
+                  ? theme.colorScheme.primary
+                  : theme.colorScheme.onSurfaceVariant,
+              size: 22,
+            ),
+            const SizedBox(height: 2),
+            Text(
+              label,
+              style: theme.textTheme.labelSmall?.copyWith(
+                color: isSelected
+                    ? theme.colorScheme.primary
+                    : theme.colorScheme.onSurfaceVariant,
+                fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
+              ),
             ),
           ],
         ),
@@ -171,3 +407,175 @@ class HomePage extends ConsumerWidget {
     );
   }
 }
+
+/// Immutable product image widget that won't rebuild
+class _ProductImage extends StatelessWidget {
+  final String productId;
+  final String? imageUrl;
+
+  const _ProductImage({
+    required this.productId,
+    required this.imageUrl,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return ClipRRect(
+      borderRadius: BorderRadius.circular(12),
+      child: imageUrl != null && imageUrl!.isNotEmpty
+          ? CachedNetworkImage(
+              key: ValueKey('product_img_$productId'),
+              imageUrl: imageUrl!,
+              width: 60,
+              height: 60,
+              fit: BoxFit.cover,
+              cacheManager: ProductImageCacheManager(),
+              memCacheWidth: 120,
+              memCacheHeight: 120,
+              maxWidthDiskCache: 240,
+              maxHeightDiskCache: 240,
+              fadeInDuration: Duration.zero, // No fade animation
+              fadeOutDuration: Duration.zero, // No fade animation
+              placeholder: (context, url) => Container(
+                width: 60,
+                height: 60,
+                color: theme.colorScheme.surfaceContainerHighest,
+              ),
+              errorWidget: (context, url, error) => Container(
+                width: 60,
+                height: 60,
+                color: theme.colorScheme.surfaceContainerHighest,
+                child: Icon(
+                  Icons.image_not_supported,
+                  color: theme.colorScheme.onSurfaceVariant,
+                  size: 24,
+                ),
+              ),
+            )
+          : Container(
+              width: 60,
+              height: 60,
+              color: theme.colorScheme.surfaceContainerHighest,
+              child: Icon(
+                Icons.inventory_2,
+                color: theme.colorScheme.onSurfaceVariant,
+              ),
+            ),
+    );
+  }
+}
+
+/// Product list item
+class _ProductListItem extends StatelessWidget {
+  final dynamic product;
+  final int quantity;
+  final VoidCallback onAdd;
+  final VoidCallback? onIncrement;
+  final VoidCallback? onDecrement;
+
+  const _ProductListItem({
+    required this.product,
+    required this.quantity,
+    required this.onAdd,
+    this.onIncrement,
+    this.onDecrement,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final isInCart = quantity > 0;
+
+    return Container(
+      margin: const EdgeInsets.only(bottom: 12),
+      decoration: BoxDecoration(
+        color: theme.colorScheme.surface,
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(
+          color: isInCart
+              ? theme.colorScheme.primary.withOpacity(0.3)
+              : theme.colorScheme.outlineVariant,
+          width: isInCart ? 2 : 1,
+        ),
+      ),
+      child: Padding(
+        padding: const EdgeInsets.all(12),
+        child: Row(
+          children: [
+            // Product image - separated into its own widget
+            _ProductImage(
+              productId: product.id,
+              imageUrl: product.imageUrl,
+            ),
+            const SizedBox(width: 12),
+            // Product info
+            Expanded(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(
+                    product.name,
+                    style: theme.textTheme.titleMedium?.copyWith(
+                      fontWeight: FontWeight.bold,
+                    ),
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                  ),
+                  const SizedBox(height: 4),
+                  PriceDisplay(
+                    price: product.price,
+                    style: theme.textTheme.titleMedium?.copyWith(
+                      fontWeight: FontWeight.bold,
+                      color: theme.colorScheme.primary,
+                    ),
+                  ),
+                ],
+              ),
+            ),
+            const SizedBox(width: 12),
+            // Add/quantity controls
+            if (!isInCart)
+              IconButton(
+                onPressed: onAdd,
+                icon: const Icon(Icons.add_circle),
+                iconSize: 32,
+                color: theme.colorScheme.primary,
+              )
+            else
+              Container(
+                decoration: BoxDecoration(
+                  color: theme.colorScheme.primaryContainer,
+                  borderRadius: BorderRadius.circular(24),
+                ),
+                child: Row(
+                  children: [
+                    IconButton(
+                      onPressed: onDecrement,
+                      icon: const Icon(Icons.remove),
+                      iconSize: 20,
+                      color: theme.colorScheme.primary,
+                    ),
+                    Text(
+                      '$quantity',
+                      style: theme.textTheme.titleMedium?.copyWith(
+                        fontWeight: FontWeight.bold,
+                        color: theme.colorScheme.primary,
+                      ),
+                    ),
+                    IconButton(
+                      onPressed: onIncrement,
+                      icon: const Icon(Icons.add),
+                      iconSize: 20,
+                      color: theme.colorScheme.primary,
+                    ),
+                  ],
+                ),
+              ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/features/home/presentation/providers/cart_total_provider.dart

@@ -27,7 +27,7 @@ class CartTotal extends _$CartTotal {
     // Calculate subtotal
     final subtotal = items.fold<double>(
       0.0,
-      (sum, item) => sum + item.lineTotal,
+      (sum, item) => sum + item.total,
     );
 
     // Calculate tax

lib/features/home/presentation/providers/cart_total_provider.g.dart

@@ -44,7 +44,7 @@ final class CartTotalProvider
   }
 }
 
-String _$cartTotalHash() => r'044f6d4749eec49f9ef4173fc42d149a3841df21';
+String _$cartTotalHash() => r'3e4ed08789743e7149a77047651b5d99e380a696';
 
 /// Cart totals calculation provider
 

lib/features/home/presentation/widgets/cart_bottom_bar.dart

@@ -0,0 +1,348 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../providers/cart_provider.dart';
+import '../providers/cart_total_provider.dart';
+import '../../../../shared/widgets/price_display.dart';
+
+/// Bottom bar showing cart total and checkout button
+class CartBottomBar extends ConsumerWidget {
+  const CartBottomBar({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final cartAsync = ref.watch(cartProvider);
+    final totalData = ref.watch(cartTotalProvider);
+    final theme = Theme.of(context);
+
+    final itemCount = cartAsync.value?.length ?? 0;
+    final hasItems = itemCount > 0;
+
+    return AnimatedContainer(
+      duration: const Duration(milliseconds: 300),
+      height: hasItems ? 80 : 0,
+      child: hasItems
+          ? Container(
+              decoration: BoxDecoration(
+                color: theme.colorScheme.primaryContainer,
+                boxShadow: [
+                  BoxShadow(
+                    color: Colors.black.withOpacity(0.1),
+                    blurRadius: 8,
+                    offset: const Offset(0, -2),
+                  ),
+                ],
+              ),
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+              child: Row(
+                children: [
+                  // Cart icon with badge
+                  Stack(
+                    clipBehavior: Clip.none,
+                    children: [
+                      Icon(
+                        Icons.shopping_cart,
+                        size: 32,
+                        color: theme.colorScheme.onPrimaryContainer,
+                      ),
+                      Positioned(
+                        right: -8,
+                        top: -8,
+                        child: Container(
+                          padding: const EdgeInsets.all(4),
+                          decoration: BoxDecoration(
+                            color: theme.colorScheme.error,
+                            shape: BoxShape.circle,
+                          ),
+                          constraints: const BoxConstraints(
+                            minWidth: 20,
+                            minHeight: 20,
+                          ),
+                          child: Center(
+                            child: Text(
+                              '$itemCount',
+                              style: theme.textTheme.labelSmall?.copyWith(
+                                color: theme.colorScheme.onError,
+                                fontWeight: FontWeight.bold,
+                              ),
+                            ),
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                  const SizedBox(width: 16),
+                  // Total info
+                  Expanded(
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      mainAxisAlignment: MainAxisAlignment.center,
+                      children: [
+                        Text(
+                          '$itemCount item${itemCount == 1 ? '' : 's'}',
+                          style: theme.textTheme.bodySmall?.copyWith(
+                            color: theme.colorScheme.onPrimaryContainer,
+                          ),
+                        ),
+                        const SizedBox(height: 2),
+                        PriceDisplay(
+                          price: totalData.total,
+                          style: theme.textTheme.titleLarge?.copyWith(
+                            fontWeight: FontWeight.bold,
+                            color: theme.colorScheme.onPrimaryContainer,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                  // View Cart button
+                  OutlinedButton(
+                    onPressed: () {
+                      _showCartBottomSheet(context, ref);
+                    },
+                    style: OutlinedButton.styleFrom(
+                      foregroundColor: theme.colorScheme.onPrimaryContainer,
+                      side: BorderSide(
+                        color: theme.colorScheme.onPrimaryContainer,
+                      ),
+                    ),
+                    child: const Text('View Cart'),
+                  ),
+                  const SizedBox(width: 8),
+                  // Checkout button
+                  FilledButton.icon(
+                    onPressed: () {
+                      // TODO: Navigate to checkout
+                      ScaffoldMessenger.of(context).showSnackBar(
+                        const SnackBar(
+                          content: Text('Checkout coming soon!'),
+                        ),
+                      );
+                    },
+                    icon: const Icon(Icons.payment),
+                    label: const Text('Checkout'),
+                    style: FilledButton.styleFrom(
+                      backgroundColor: theme.colorScheme.primary,
+                      foregroundColor: theme.colorScheme.onPrimary,
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 24,
+                        vertical: 12,
+                      ),
+                    ),
+                  ),
+                ],
+              ),
+            )
+          : const SizedBox.shrink(),
+    );
+  }
+
+  void _showCartBottomSheet(BuildContext context, WidgetRef ref) {
+    showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      builder: (context) => DraggableScrollableSheet(
+        initialChildSize: 0.7,
+        minChildSize: 0.5,
+        maxChildSize: 0.95,
+        expand: false,
+        builder: (context, scrollController) {
+          return CartBottomSheet(scrollController: scrollController);
+        },
+      ),
+    );
+  }
+}
+
+/// Cart bottom sheet content
+class CartBottomSheet extends ConsumerWidget {
+  final ScrollController scrollController;
+
+  const CartBottomSheet({
+    super.key,
+    required this.scrollController,
+  });
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final cartAsync = ref.watch(cartProvider);
+    final totalData = ref.watch(cartTotalProvider);
+    final theme = Theme.of(context);
+
+    return Container(
+      decoration: BoxDecoration(
+        color: theme.colorScheme.surface,
+        borderRadius: const BorderRadius.vertical(top: Radius.circular(20)),
+      ),
+      child: Column(
+        children: [
+          // Handle bar
+          Container(
+            margin: const EdgeInsets.symmetric(vertical: 12),
+            width: 40,
+            height: 4,
+            decoration: BoxDecoration(
+              color: theme.colorScheme.onSurfaceVariant.withOpacity(0.4),
+              borderRadius: BorderRadius.circular(2),
+            ),
+          ),
+          // Header
+          Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 16),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Text(
+                  'Shopping Cart',
+                  style: theme.textTheme.titleLarge?.copyWith(
+                    fontWeight: FontWeight.bold,
+                  ),
+                ),
+                if (cartAsync.value?.isNotEmpty ?? false)
+                  TextButton.icon(
+                    onPressed: () {
+                      ref.read(cartProvider.notifier).clearCart();
+                    },
+                    icon: const Icon(Icons.delete_sweep),
+                    label: const Text('Clear'),
+                  ),
+              ],
+            ),
+          ),
+          const Divider(),
+          // Cart items
+          Expanded(
+            child: cartAsync.when(
+              loading: () => const Center(child: CircularProgressIndicator()),
+              error: (error, stack) => Center(child: Text('Error: $error')),
+              data: (items) {
+                if (items.isEmpty) {
+                  return const Center(
+                    child: Text('Cart is empty'),
+                  );
+                }
+
+                return ListView.separated(
+                  controller: scrollController,
+                  padding: const EdgeInsets.symmetric(horizontal: 16),
+                  itemCount: items.length,
+                  separatorBuilder: (context, index) => const Divider(),
+                  itemBuilder: (context, index) {
+                    final item = items[index];
+                    return ListTile(
+                      contentPadding: EdgeInsets.zero,
+                      title: Text(item.productName),
+                      subtitle: PriceDisplay(
+                        price: item.price,
+                        style: theme.textTheme.bodyMedium,
+                      ),
+                      trailing: Row(
+                        mainAxisSize: MainAxisSize.min,
+                        children: [
+                          // Quantity controls
+                          IconButton(
+                            icon: const Icon(Icons.remove_circle_outline),
+                            onPressed: item.quantity > 1
+                                ? () => ref
+                                    .read(cartProvider.notifier)
+                                    .updateQuantity(
+                                      item.productId,
+                                      item.quantity - 1,
+                                    )
+                                : null,
+                            iconSize: 20,
+                          ),
+                          Text(
+                            '${item.quantity}',
+                            style: theme.textTheme.titleMedium,
+                          ),
+                          IconButton(
+                            icon: const Icon(Icons.add_circle_outline),
+                            onPressed: () => ref
+                                .read(cartProvider.notifier)
+                                .updateQuantity(
+                                  item.productId,
+                                  item.quantity + 1,
+                                ),
+                            iconSize: 20,
+                          ),
+                          // Remove button
+                          IconButton(
+                            icon: const Icon(Icons.delete_outline),
+                            onPressed: () => ref
+                                .read(cartProvider.notifier)
+                                .removeItem(item.productId),
+                            color: theme.colorScheme.error,
+                            iconSize: 20,
+                          ),
+                        ],
+                      ),
+                    );
+                  },
+                );
+              },
+            ),
+          ),
+          // Summary
+          Container(
+            padding: const EdgeInsets.all(16),
+            decoration: BoxDecoration(
+              color: theme.colorScheme.surfaceContainerHighest,
+              border: Border(
+                top: BorderSide(color: theme.dividerColor),
+              ),
+            ),
+            child: Column(
+              children: [
+                Row(
+                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                  children: [
+                    Text('Subtotal:', style: theme.textTheme.bodyLarge),
+                    PriceDisplay(
+                      price: totalData.subtotal,
+                      style: theme.textTheme.bodyLarge,
+                    ),
+                  ],
+                ),
+                if (totalData.tax > 0) ...[
+                  const SizedBox(height: 4),
+                  Row(
+                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                    children: [
+                      Text(
+                        'Tax (${(totalData.taxRate * 100).toStringAsFixed(0)}%):',
+                        style: theme.textTheme.bodyLarge,
+                      ),
+                      PriceDisplay(
+                        price: totalData.tax,
+                        style: theme.textTheme.bodyLarge,
+                      ),
+                    ],
+                  ),
+                ],
+                const Divider(height: 16),
+                Row(
+                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                  children: [
+                    Text(
+                      'Total:',
+                      style: theme.textTheme.titleLarge?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                    ),
+                    PriceDisplay(
+                      price: totalData.total,
+                      style: theme.textTheme.titleLarge?.copyWith(
+                        fontWeight: FontWeight.bold,
+                        color: theme.colorScheme.primary,
+                      ),
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/features/home/presentation/widgets/pos_product_card.dart

@@ -0,0 +1,156 @@
+import 'package:flutter/material.dart';
+import '../../../products/domain/entities/product.dart';
+import '../../../../shared/widgets/price_display.dart';
+import '../../../../core/widgets/optimized_cached_image.dart';
+
+/// POS-specific product card with Add to Cart button
+class PosProductCard extends StatelessWidget {
+  final Product product;
+  final VoidCallback onAddToCart;
+
+  const PosProductCard({
+    super.key,
+    required this.product,
+    required this.onAddToCart,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final isLowStock = product.stockQuantity < 5;
+    final isOutOfStock = product.stockQuantity == 0;
+
+    return Card(
+      clipBehavior: Clip.antiAlias,
+      elevation: 2,
+      child: InkWell(
+        onTap: isOutOfStock ? null : onAddToCart,
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            // Product Image
+            Expanded(
+              flex: 3,
+              child: Stack(
+                fit: StackFit.expand,
+                children: [
+                  product.imageUrl != null
+                      ? OptimizedCachedImage(
+                          imageUrl: product.imageUrl!,
+                          fit: BoxFit.cover,
+                        )
+                      : Container(
+                          color: theme.colorScheme.surfaceContainerHighest,
+                          child: Icon(
+                            Icons.inventory_2,
+                            size: 48,
+                            color: theme.colorScheme.onSurfaceVariant,
+                          ),
+                        ),
+                  // Stock badge
+                  if (isOutOfStock)
+                    Positioned(
+                      top: 8,
+                      right: 8,
+                      child: Container(
+                        padding: const EdgeInsets.symmetric(
+                          horizontal: 8,
+                          vertical: 4,
+                        ),
+                        decoration: BoxDecoration(
+                          color: theme.colorScheme.error,
+                          borderRadius: BorderRadius.circular(12),
+                        ),
+                        child: Text(
+                          'OUT OF STOCK',
+                          style: theme.textTheme.labelSmall?.copyWith(
+                            color: theme.colorScheme.onError,
+                            fontWeight: FontWeight.bold,
+                          ),
+                        ),
+                      ),
+                    )
+                  else if (isLowStock)
+                    Positioned(
+                      top: 8,
+                      right: 8,
+                      child: Container(
+                        padding: const EdgeInsets.symmetric(
+                          horizontal: 8,
+                          vertical: 4,
+                        ),
+                        decoration: BoxDecoration(
+                          color: theme.colorScheme.errorContainer,
+                          borderRadius: BorderRadius.circular(12),
+                        ),
+                        child: Text(
+                          '${product.stockQuantity} left',
+                          style: theme.textTheme.labelSmall?.copyWith(
+                            color: theme.colorScheme.onErrorContainer,
+                            fontWeight: FontWeight.bold,
+                          ),
+                        ),
+                      ),
+                    ),
+                ],
+              ),
+            ),
+            // Product Info
+            Expanded(
+              flex: 2,
+              child: Padding(
+                padding: const EdgeInsets.all(8.0),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                  children: [
+                    // Product Name
+                    Text(
+                      product.name,
+                      style: theme.textTheme.titleSmall?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                      maxLines: 2,
+                      overflow: TextOverflow.ellipsis,
+                    ),
+                    const SizedBox(height: 4),
+                    // Price and Add Button Row
+                    Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                      crossAxisAlignment: CrossAxisAlignment.center,
+                      children: [
+                        Expanded(
+                          child: PriceDisplay(
+                            price: product.price,
+                            style: theme.textTheme.titleMedium?.copyWith(
+                              fontWeight: FontWeight.bold,
+                              color: theme.colorScheme.primary,
+                            ),
+                          ),
+                        ),
+                        // Add to Cart Button
+                        FilledButton.icon(
+                          onPressed: isOutOfStock ? null : onAddToCart,
+                          icon: const Icon(Icons.add_shopping_cart, size: 18),
+                          label: const Text('Add'),
+                          style: FilledButton.styleFrom(
+                            padding: const EdgeInsets.symmetric(
+                              horizontal: 12,
+                              vertical: 8,
+                            ),
+                            minimumSize: Size.zero,
+                            tapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ],
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/features/home/presentation/widgets/product_selector.dart

@@ -1,14 +1,14 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../../products/presentation/providers/products_provider.dart';
-import '../../../products/presentation/widgets/product_card.dart';
 import '../../../products/domain/entities/product.dart';
 import '../../../../core/widgets/loading_indicator.dart';
 import '../../../../core/widgets/error_widget.dart';
 import '../../../../core/widgets/empty_state.dart';
+import 'pos_product_card.dart';
 
 /// Product selector widget for POS
-class ProductSelector extends ConsumerWidget {
+class ProductSelector extends ConsumerStatefulWidget {
   final void Function(Product)? onProductTap;
 
   const ProductSelector({
@@ -17,7 +17,14 @@ class ProductSelector extends ConsumerWidget {
   });
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  ConsumerState<ProductSelector> createState() => _ProductSelectorState();
+}
+
+class _ProductSelectorState extends ConsumerState<ProductSelector> {
+  String _searchQuery = '';
+
+  @override
+  Widget build(BuildContext context) {
     final productsAsync = ref.watch(productsProvider);
 
     return Container(
@@ -30,6 +37,33 @@ class ProductSelector extends ConsumerWidget {
             style: Theme.of(context).textTheme.titleLarge,
           ),
           const SizedBox(height: 16),
+          // Search Bar
+          TextField(
+            onChanged: (value) {
+              setState(() {
+                _searchQuery = value;
+              });
+            },
+            decoration: InputDecoration(
+              hintText: 'Search products...',
+              prefixIcon: const Icon(Icons.search),
+              suffixIcon: _searchQuery.isNotEmpty
+                  ? IconButton(
+                      icon: const Icon(Icons.clear),
+                      onPressed: () {
+                        setState(() {
+                          _searchQuery = '';
+                        });
+                      },
+                    )
+                  : null,
+              border: OutlineInputBorder(
+                borderRadius: BorderRadius.circular(12),
+              ),
+              filled: true,
+            ),
+          ),
+          const SizedBox(height: 16),
           Expanded(
             child: productsAsync.when(
               loading: () => const LoadingIndicator(
@@ -39,8 +73,7 @@ class ProductSelector extends ConsumerWidget {
                 message: error.toString(),
                 onRetry: () => ref.refresh(productsProvider),
               ),
-              data: (paginationState) {
+              data: (products) {
-                final products = paginationState.products;
 
                 if (products.isEmpty) {
                   return const EmptyState(
@@ -51,13 +84,26 @@ class ProductSelector extends ConsumerWidget {
                 }
 
                 // Filter only available products for POS
-                final availableProducts =
+                var availableProducts =
                     products.where((p) => p.isAvailable).toList();
 
+                // Apply search filter
+                if (_searchQuery.isNotEmpty) {
+                  availableProducts = availableProducts.where((p) {
+                    final query = _searchQuery.toLowerCase();
+                    return p.name.toLowerCase().contains(query) ||
+                        (p.description?.toLowerCase().contains(query) ?? false);
+                  }).toList();
+                }
+
                 if (availableProducts.isEmpty) {
-                  return const EmptyState(
+                  return EmptyState(
-                    message: 'No products available',
+                    message: _searchQuery.isNotEmpty
-                    subMessage: 'All products are currently unavailable',
+                        ? 'No products found'
+                        : 'No products available',
+                    subMessage: _searchQuery.isNotEmpty
+                        ? 'Try a different search term'
+                        : 'All products are currently unavailable',
                     icon: Icons.inventory_2_outlined,
                   );
                 }
@@ -82,9 +128,9 @@ class ProductSelector extends ConsumerWidget {
                       itemCount: availableProducts.length,
                       itemBuilder: (context, index) {
                         final product = availableProducts[index];
-                        return GestureDetector(
+                        return PosProductCard(
-                          onTap: () => onProductTap?.call(product),
+                          product: product,
-                          child: ProductCard(product: product),
+                          onAddToCart: () => widget.onProductTap?.call(product),
                         );
                       },
                     );

lib/features/products/data/models/product_model.dart

@@ -13,7 +13,7 @@ class ProductModel extends HiveObject {
   final String name;
 
   @HiveField(2)
-  final String description;
+  final String? description;
 
   @HiveField(3)
   final double price;
@@ -31,22 +31,22 @@ class ProductModel extends HiveObject {
   final bool isAvailable;
 
   @HiveField(8)
-  final DateTime createdAt;
+  final DateTime? createdAt;
 
   @HiveField(9)
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   ProductModel({
     required this.id,
     required this.name,
-    required this.description,
+    this.description,
     required this.price,
     this.imageUrl,
     required this.categoryId,
     required this.stockQuantity,
     required this.isAvailable,
-    required this.createdAt,
+    this.createdAt,
-    required this.updatedAt,
+    this.updatedAt,
   });
 
   /// Convert to domain entity
@@ -86,14 +86,18 @@ class ProductModel extends HiveObject {
     return ProductModel(
       id: json['id'] as String,
       name: json['name'] as String,
-      description: json['description'] as String? ?? '',
+      description: json['description'] as String?,
       price: (json['price'] as num).toDouble(),
       imageUrl: json['imageUrl'] as String?,
       categoryId: json['categoryId'] as String,
       stockQuantity: json['stockQuantity'] as int? ?? 0,
       isAvailable: json['isAvailable'] as bool? ?? true,
-      createdAt: DateTime.parse(json['createdAt'] as String),
+      createdAt: json['createdAt'] != null
-      updatedAt: DateTime.parse(json['updatedAt'] as String),
+          ? DateTime.parse(json['createdAt'] as String)
+          : null,
+      updatedAt: json['updatedAt'] != null
+          ? DateTime.parse(json['updatedAt'] as String)
+          : null,
     );
   }
 
@@ -108,8 +112,8 @@ class ProductModel extends HiveObject {
       'categoryId': categoryId,
       'stockQuantity': stockQuantity,
       'isAvailable': isAvailable,
-      'createdAt': createdAt.toIso8601String(),
+      'createdAt': createdAt?.toIso8601String(),
-      'updatedAt': updatedAt.toIso8601String(),
+      'updatedAt': updatedAt?.toIso8601String(),
     };
   }
 }

lib/features/products/data/models/product_model.g.dart

@@ -25,8 +25,8 @@ class ProductModelAdapter extends TypeAdapter<ProductModel> {
       categoryId: fields[5] as String,
       stockQuantity: (fields[6] as num).toInt(),
       isAvailable: fields[7] as bool,
-      createdAt: fields[8] as DateTime,
+      createdAt: fields[8] as DateTime?,
-      updatedAt: fields[9] as DateTime,
+      updatedAt: fields[9] as DateTime?,
     );
   }
 

lib/features/products/data/repositories/product_repository_impl.dart

@@ -19,8 +19,27 @@ class ProductRepositoryImpl implements ProductRepository {
   @override
   Future<Either<Failure, List<Product>>> getAllProducts() async {
     try {
-      final products = await localDataSource.getAllProducts();
+      // Try remote first (online-first)
+      final products = await remoteDataSource.getAllProducts();
+      // Cache the results
+      await localDataSource.cacheProducts(products);
       return Right(products.map((model) => model.toEntity()).toList());
+    } on ServerException catch (e) {
+      // Remote failed, try local cache
+      try {
+        final cachedProducts = await localDataSource.getAllProducts();
+        return Right(cachedProducts.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(ServerFailure('${e.message}. Cache also unavailable.'));
+      }
+    } on NetworkException catch (e) {
+      // Network failed, try local cache
+      try {
+        final cachedProducts = await localDataSource.getAllProducts();
+        return Right(cachedProducts.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(NetworkFailure('${e.message}. Cache also unavailable.'));
+      }
     } on CacheException catch (e) {
       return Left(CacheFailure(e.message));
     }
@@ -29,9 +48,29 @@ class ProductRepositoryImpl implements ProductRepository {
   @override
   Future<Either<Failure, List<Product>>> getProductsByCategory(String categoryId) async {
     try {
-      final allProducts = await localDataSource.getAllProducts();
+      // Try remote first (online-first)
-      final filtered = allProducts.where((p) => p.categoryId == categoryId).toList();
+      final allProducts = await remoteDataSource.getAllProducts(categoryId: categoryId);
-      return Right(filtered.map((model) => model.toEntity()).toList());
+      // Cache the results
+      await localDataSource.cacheProducts(allProducts);
+      return Right(allProducts.map((model) => model.toEntity()).toList());
+    } on ServerException catch (e) {
+      // Remote failed, try local cache
+      try {
+        final cachedProducts = await localDataSource.getAllProducts();
+        final filtered = cachedProducts.where((p) => p.categoryId == categoryId).toList();
+        return Right(filtered.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(ServerFailure('${e.message}. Cache also unavailable.'));
+      }
+    } on NetworkException catch (e) {
+      // Network failed, try local cache
+      try {
+        final cachedProducts = await localDataSource.getAllProducts();
+        final filtered = cachedProducts.where((p) => p.categoryId == categoryId).toList();
+        return Right(filtered.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(NetworkFailure('${e.message}. Cache also unavailable.'));
+      }
     } on CacheException catch (e) {
       return Left(CacheFailure(e.message));
     }
@@ -40,13 +79,37 @@ class ProductRepositoryImpl implements ProductRepository {
   @override
   Future<Either<Failure, List<Product>>> searchProducts(String query) async {
     try {
-      final allProducts = await localDataSource.getAllProducts();
+      // Try remote first (online-first)
-      final filtered = allProducts.where((p) {
+      final searchResults = await remoteDataSource.getAllProducts(search: query);
-        final nameMatch = p.name.toLowerCase().contains(query.toLowerCase());
+      // Cache the results
-        final descMatch = p.description?.toLowerCase().contains(query.toLowerCase()) ?? false;
+      await localDataSource.cacheProducts(searchResults);
-        return nameMatch || descMatch;
+      return Right(searchResults.map((model) => model.toEntity()).toList());
-      }).toList();
+    } on ServerException catch (e) {
-      return Right(filtered.map((model) => model.toEntity()).toList());
+      // Remote failed, search in local cache
+      try {
+        final cachedProducts = await localDataSource.getAllProducts();
+        final filtered = cachedProducts.where((p) {
+          final nameMatch = p.name.toLowerCase().contains(query.toLowerCase());
+          final descMatch = p.description?.toLowerCase().contains(query.toLowerCase()) ?? false;
+          return nameMatch || descMatch;
+        }).toList();
+        return Right(filtered.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(ServerFailure('${e.message}. Cache also unavailable.'));
+      }
+    } on NetworkException catch (e) {
+      // Network failed, search in local cache
+      try {
+        final cachedProducts = await localDataSource.getAllProducts();
+        final filtered = cachedProducts.where((p) {
+          final nameMatch = p.name.toLowerCase().contains(query.toLowerCase());
+          final descMatch = p.description?.toLowerCase().contains(query.toLowerCase()) ?? false;
+          return nameMatch || descMatch;
+        }).toList();
+        return Right(filtered.map((model) => model.toEntity()).toList());
+      } on CacheException catch (cacheError) {
+        return Left(NetworkFailure('${e.message}. Cache also unavailable.'));
+      }
     } on CacheException catch (e) {
       return Left(CacheFailure(e.message));
     }
@@ -55,11 +118,33 @@ class ProductRepositoryImpl implements ProductRepository {
   @override
   Future<Either<Failure, Product>> getProductById(String id) async {
     try {
-      final product = await localDataSource.getProductById(id);
+      // Try remote first (online-first)
-      if (product == null) {
+      final product = await remoteDataSource.getProductById(id);
-        return Left(NotFoundFailure('Product not found'));
+      // Cache the result
-      }
+      await localDataSource.updateProduct(product);
       return Right(product.toEntity());
+    } on ServerException catch (e) {
+      // Remote failed, try local cache
+      try {
+        final cachedProduct = await localDataSource.getProductById(id);
+        if (cachedProduct == null) {
+          return Left(NotFoundFailure('Product not found in cache'));
+        }
+        return Right(cachedProduct.toEntity());
+      } on CacheException catch (cacheError) {
+        return Left(ServerFailure('${e.message}. Cache also unavailable.'));
+      }
+    } on NetworkException catch (e) {
+      // Network failed, try local cache
+      try {
+        final cachedProduct = await localDataSource.getProductById(id);
+        if (cachedProduct == null) {
+          return Left(NotFoundFailure('Product not found in cache'));
+        }
+        return Right(cachedProduct.toEntity());
+      } on CacheException catch (cacheError) {
+        return Left(NetworkFailure('${e.message}. Cache also unavailable.'));
+      }
     } on CacheException catch (e) {
       return Left(CacheFailure(e.message));
     }
@@ -68,11 +153,7 @@ class ProductRepositoryImpl implements ProductRepository {
   @override
   Future<Either<Failure, List<Product>>> syncProducts() async {
     try {
-      final response = await remoteDataSource.getAllProducts();
+      final products = await remoteDataSource.getAllProducts();
-      final productsData = response['data'] as List<dynamic>;
-      final products = productsData
-          .map((json) => ProductModel.fromJson(json as Map<String, dynamic>))
-          .toList();
       await localDataSource.cacheProducts(products);
       final entities = products.map((model) => model.toEntity()).toList();
       return Right(entities);

lib/features/products/domain/entities/product.dart

@@ -10,8 +10,8 @@ class Product extends Equatable {
   final String categoryId;
   final int stockQuantity;
   final bool isAvailable;
-  final DateTime createdAt;
+  final DateTime? createdAt;
-  final DateTime updatedAt;
+  final DateTime? updatedAt;
 
   const Product({
     required this.id,
@@ -22,8 +22,8 @@ class Product extends Equatable {
     required this.categoryId,
     required this.stockQuantity,
     required this.isAvailable,
-    required this.createdAt,
+    this.createdAt,
-    required this.updatedAt,
+    this.updatedAt,
   });
 
   @override

lib/features/products/presentation/pages/batch_update_page.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
 import '../../domain/entities/product.dart';
 import '../../data/models/product_model.dart';
 import '../providers/products_provider.dart';
@@ -139,7 +140,7 @@ class _BatchUpdatePageState extends ConsumerState<BatchUpdatePage> {
                   children: [
                     Expanded(
                       child: OutlinedButton(
-                        onPressed: _isLoading ? null : () => Navigator.pop(context),
+                        onPressed: _isLoading ? null : () => context.pop(),
                         child: const Text('Cancel'),
                       ),
                     ),
@@ -327,7 +328,7 @@ class _BatchUpdatePageState extends ConsumerState<BatchUpdatePage> {
       ref.invalidate(productsProvider);
 
       if (mounted) {
-        Navigator.pop(context);
+        context.pop();
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
             content: Text(

lib/features/products/presentation/pages/product_detail_page.dart

@@ -3,33 +3,66 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:intl/intl.dart';
 import '../../domain/entities/product.dart';
+import '../providers/products_provider.dart';
 import '../../../categories/presentation/providers/categories_provider.dart';
 import '../../../../shared/widgets/price_display.dart';
 
 /// Product detail page showing full product information
 class ProductDetailPage extends ConsumerWidget {
-  final Product product;
+  final String productId;
 
   const ProductDetailPage({
     super.key,
-    required this.product,
+    required this.productId,
   });
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final productsAsync = ref.watch(productsProvider);
     final categoriesAsync = ref.watch(categoriesProvider);
 
-    // Find category name
+    return productsAsync.when(
-    final categoryName = categoriesAsync.whenOrNull(
+      data: (products) {
-      data: (categories) {
+        // Find the product by ID
-        final category = categories.firstWhere(
+        Product? product;
-          (cat) => cat.id == product.categoryId,
+        try {
-          orElse: () => categories.first,
+          product = products.firstWhere((p) => p.id == productId);
-        );
+        } catch (e) {
-        return category.name;
+          // Product not found
-      },
+          return Scaffold(
-    );
+            appBar: AppBar(title: const Text('Product Not Found')),
+            body: const Center(child: Text('Product not found')),
+          );
+        }
 
+        // Find category name
+        final categoryName = categoriesAsync.whenOrNull(
+          data: (categories) {
+            try {
+              final category = categories.firstWhere(
+                (cat) => cat.id == product!.categoryId,
+              );
+              return category.name;
+            } catch (e) {
+              return null;
+            }
+          },
+        );
+
+        return _buildProductDetail(context, product, categoryName);
+      },
+      loading: () => Scaffold(
+        appBar: AppBar(title: const Text('Product Details')),
+        body: const Center(child: CircularProgressIndicator()),
+      ),
+      error: (error, stack) => Scaffold(
+        appBar: AppBar(title: const Text('Error')),
+        body: Center(child: Text('Error: $error')),
+      ),
+    );
+  }
+
+  Widget _buildProductDetail(BuildContext context, Product product, String? categoryName) {
     return Scaffold(
       appBar: AppBar(
         title: const Text('Product Details'),
@@ -48,7 +81,7 @@ class ProductDetailPage extends ConsumerWidget {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             // Product Image
-            _buildProductImage(context),
+            _buildProductImage(context, product),
 
             // Product Info Section
             Padding(
@@ -97,19 +130,19 @@ class ProductDetailPage extends ConsumerWidget {
                   const SizedBox(height: 24),
 
                   // Stock Information
-                  _buildStockSection(context),
+                  _buildStockSection(context, product),
                   const SizedBox(height: 24),
 
                   // Description Section
-                  _buildDescriptionSection(context),
+                  _buildDescriptionSection(context, product),
                   const SizedBox(height: 24),
 
                   // Additional Information
-                  _buildAdditionalInfo(context),
+                  _buildAdditionalInfo(context, product),
                   const SizedBox(height: 24),
 
                   // Action Buttons
-                  _buildActionButtons(context),
+                  _buildActionButtons(context, product),
                 ],
               ),
             ),
@@ -120,7 +153,7 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Build product image section
-  Widget _buildProductImage(BuildContext context) {
+  Widget _buildProductImage(BuildContext context, Product product) {
     return Hero(
       tag: 'product-${product.id}',
       child: Container(
@@ -154,9 +187,9 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Build stock information section
-  Widget _buildStockSection(BuildContext context) {
+  Widget _buildStockSection(BuildContext context, Product product) {
-    final stockColor = _getStockColor(context);
+    final stockColor = _getStockColor(context, product);
-    final stockStatus = _getStockStatus();
+    final stockStatus = _getStockStatus(product);
 
     return Card(
       child: Padding(
@@ -245,8 +278,8 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Build description section
-  Widget _buildDescriptionSection(BuildContext context) {
+  Widget _buildDescriptionSection(BuildContext context, Product product) {
-    if (product.description.isEmpty) {
+    if (product.description == null || product.description!.isEmpty) {
       return const SizedBox.shrink();
     }
 
@@ -261,7 +294,7 @@ class ProductDetailPage extends ConsumerWidget {
         ),
         const SizedBox(height: 8),
         Text(
-          product.description,
+          product.description!,
           style: Theme.of(context).textTheme.bodyLarge,
         ),
       ],
@@ -269,7 +302,7 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Build additional information section
-  Widget _buildAdditionalInfo(BuildContext context) {
+  Widget _buildAdditionalInfo(BuildContext context, Product product) {
     final dateFormat = DateFormat('MMM dd, yyyy');
 
     return Card(
@@ -296,14 +329,18 @@ class ProductDetailPage extends ConsumerWidget {
               context,
               icon: Icons.calendar_today,
               label: 'Created',
-              value: dateFormat.format(product.createdAt),
+              value: product.createdAt != null
+                  ? dateFormat.format(product.createdAt!)
+                  : 'N/A',
             ),
             const Divider(height: 24),
             _buildInfoRow(
               context,
               icon: Icons.update,
               label: 'Last Updated',
-              value: dateFormat.format(product.updatedAt),
+              value: product.updatedAt != null
+                  ? dateFormat.format(product.updatedAt!)
+                  : 'N/A',
             ),
           ],
         ),
@@ -351,7 +388,7 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Build action buttons
-  Widget _buildActionButtons(BuildContext context) {
+  Widget _buildActionButtons(BuildContext context, Product product) {
     return Column(
       children: [
         // Add to Cart Button
@@ -396,7 +433,7 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Get stock color based on quantity
-  Color _getStockColor(BuildContext context) {
+  Color _getStockColor(BuildContext context, Product product) {
     if (product.stockQuantity == 0) {
       return Colors.red;
     } else if (product.stockQuantity < 5) {
@@ -407,7 +444,7 @@ class ProductDetailPage extends ConsumerWidget {
   }
 
   /// Get stock status text
-  String _getStockStatus() {
+  String _getStockStatus(Product product) {
     if (product.stockQuantity == 0) {
       return 'Out of Stock';
     } else if (product.stockQuantity < 5) {

lib/features/products/presentation/pages/products_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
 import '../widgets/product_grid.dart';
 import '../widgets/product_search_bar.dart';
 import '../widgets/product_list_item.dart';
@@ -99,13 +100,9 @@ class _ProductsPageState extends ConsumerState<ProductsPage> {
                       final selectedProducts = filteredProducts
                           .where((p) => _selectedProductIds.contains(p.id))
                           .toList();
-                      Navigator.push(
+                      context.push(
-                        context,
+                        '/products/batch-update',
-                        MaterialPageRoute(
+                        extra: selectedProducts,
-                          builder: (context) => BatchUpdatePage(
-                            selectedProducts: selectedProducts,
-                          ),
-                        ),
                       ).then((_) {
                         setState(() {
                           _isSelectionMode = false;
@@ -493,10 +490,18 @@ class _ProductsPageState extends ConsumerState<ProductsPage> {
         sorted.sort((a, b) => b.price.compareTo(a.price));
         break;
       case ProductSortOption.newest:
-        sorted.sort((a, b) => b.createdAt.compareTo(a.createdAt));
+        sorted.sort((a, b) {
+          final aDate = a.createdAt ?? DateTime(2000);
+          final bDate = b.createdAt ?? DateTime(2000);
+          return bDate.compareTo(aDate);
+        });
         break;
       case ProductSortOption.oldest:
-        sorted.sort((a, b) => a.createdAt.compareTo(b.createdAt));
+        sorted.sort((a, b) {
+          final aDate = a.createdAt ?? DateTime(2000);
+          final bDate = b.createdAt ?? DateTime(2000);
+          return aDate.compareTo(bDate);
+        });
         break;
     }
 

lib/features/products/presentation/providers/filtered_products_provider.dart

@@ -15,7 +15,7 @@ class FilteredProducts extends _$FilteredProducts {
     // Watch products state
     final productsAsync = ref.watch(productsProvider);
     final products = productsAsync.when(
-      data: (data) => data.products,
+      data: (data) => data,
       loading: () => <Product>[],
       error: (_, __) => <Product>[],
     );
@@ -91,10 +91,18 @@ class SortedProducts extends _$SortedProducts {
         sorted.sort((a, b) => b.price.compareTo(a.price));
         break;
       case ProductSortOption.newest:
-        sorted.sort((a, b) => b.createdAt.compareTo(a.createdAt));
+        sorted.sort((a, b) {
+          final aDate = a.createdAt ?? DateTime(2000);
+          final bDate = b.createdAt ?? DateTime(2000);
+          return bDate.compareTo(aDate);
+        });
         break;
       case ProductSortOption.oldest:
-        sorted.sort((a, b) => a.createdAt.compareTo(b.createdAt));
+        sorted.sort((a, b) {
+          final aDate = a.createdAt ?? DateTime(2000);
+          final bDate = b.createdAt ?? DateTime(2000);
+          return aDate.compareTo(bDate);
+        });
         break;
     }
 

lib/features/products/presentation/providers/filtered_products_provider.g.dart

@@ -50,7 +50,7 @@ final class FilteredProductsProvider
   }
 }
 
-String _$filteredProductsHash() => r'd8ca6d80a71bf354e3afe6c38335996a8bfc74b7';
+String _$filteredProductsHash() => r'97fb09ade4bc65f92f3d4844b059bb2b0660d3df';
 
 /// Filtered products provider
 /// Combines products, search query, and category filter to provide filtered results
@@ -131,7 +131,7 @@ final class SortedProductsProvider
   }
 }
 
-String _$sortedProductsHash() => r'653f1e9af8c188631dadbfe9ed7d944c6876d2d3';
+String _$sortedProductsHash() => r'8a526ae12a15ca7decc8880ebbd083df455875a8';
 
 /// Provider for sorted products
 /// Adds sorting capability on top of filtered products

lib/features/products/presentation/providers/products_provider.dart

@@ -5,12 +5,13 @@ import '../../../../core/providers/providers.dart';
 
 part 'products_provider.g.dart';
 
-/// Provider for products list with API-first approach
+/// Provider for products list with online-first approach
-@riverpod
+/// keepAlive ensures data persists when switching tabs
+@Riverpod(keepAlive: true)
 class Products extends _$Products {
   @override
   Future<List<Product>> build() async {
-    // API-first: Try to load from API first
+    // Online-first: Try to load from API first
     final repository = ref.watch(productRepositoryProvider);
     final networkInfo = ref.watch(networkInfoProvider);
 

lib/features/products/presentation/providers/products_provider.g.dart

@@ -8,22 +8,25 @@ part of 'products_provider.dart';
 
 // GENERATED CODE - DO NOT MODIFY BY HAND
 // ignore_for_file: type=lint, type=warning
-/// Provider for products list with API-first approach
+/// Provider for products list with online-first approach
+/// keepAlive ensures data persists when switching tabs
 
 @ProviderFor(Products)
 const productsProvider = ProductsProvider._();
 
-/// Provider for products list with API-first approach
+/// Provider for products list with online-first approach
+/// keepAlive ensures data persists when switching tabs
 final class ProductsProvider
     extends $AsyncNotifierProvider<Products, List<Product>> {
-  /// Provider for products list with API-first approach
+  /// Provider for products list with online-first approach
+  /// keepAlive ensures data persists when switching tabs
   const ProductsProvider._()
     : super(
         from: null,
         argument: null,
         retry: null,
         name: r'productsProvider',
-        isAutoDispose: true,
+        isAutoDispose: false,
         dependencies: null,
         $allTransitiveDependencies: null,
       );
@@ -36,9 +39,10 @@ final class ProductsProvider
   Products create() => Products();
 }
 
-String _$productsHash() => r'0ff8c2de46bb4b1e29678cc811ec121c9fb4c8eb';
+String _$productsHash() => r'1fa5341d86a35a3b3d6666da88e0c5db757cdcdb';
 
-/// Provider for products list with API-first approach
+/// Provider for products list with online-first approach
+/// keepAlive ensures data persists when switching tabs
 
 abstract class _$Products extends $AsyncNotifier<List<Product>> {
   FutureOr<List<Product>> build();

lib/features/products/presentation/widgets/product_card.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:cached_network_image/cached_network_image.dart';
+import 'package:go_router/go_router.dart';
 import '../../domain/entities/product.dart';
-import '../pages/product_detail_page.dart';
 import '../../../../shared/widgets/price_display.dart';
 
 /// Product card widget
@@ -20,12 +20,7 @@ class ProductCard extends StatelessWidget {
       child: InkWell(
         onTap: () {
           // Navigate to product detail page
-          Navigator.push(
+          context.push('/products/${product.id}');
-            context,
-            MaterialPageRoute(
-              builder: (context) => ProductDetailPage(product: product),
-            ),
-          );
         },
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,

lib/features/products/presentation/widgets/product_list_item.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:cached_network_image/cached_network_image.dart';
+import 'package:go_router/go_router.dart';
 import '../../domain/entities/product.dart';
-import '../pages/product_detail_page.dart';
 import '../../../../shared/widgets/price_display.dart';
 
 /// Product list item widget for list view
@@ -23,12 +23,7 @@ class ProductListItem extends StatelessWidget {
         onTap: onTap ??
             () {
               // Navigate to product detail page
-              Navigator.push(
+              context.push('/products/${product.id}');
-                context,
-                MaterialPageRoute(
-                  builder: (context) => ProductDetailPage(product: product),
-                ),
-              );
             },
         child: Padding(
           padding: const EdgeInsets.all(12.0),
@@ -85,9 +80,9 @@ class ProductListItem extends StatelessWidget {
                       overflow: TextOverflow.ellipsis,
                     ),
                     const SizedBox(height: 4),
-                    if (product.description.isNotEmpty)
+                    if (product.description != null && product.description!.isNotEmpty)
                       Text(
-                        product.description,
+                        product.description!,
                         style: Theme.of(context).textTheme.bodySmall?.copyWith(
                               color: Theme.of(context).colorScheme.onSurfaceVariant,
                             ),

lib/features/settings/presentation/pages/settings_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
 import '../providers/settings_provider.dart';
 import '../../../auth/presentation/providers/auth_provider.dart';
 import '../../../../core/constants/app_constants.dart';
@@ -105,11 +106,11 @@ class SettingsPage extends ConsumerWidget {
                                 content: const Text('Are you sure you want to logout?'),
                                 actions: [
                                   TextButton(
-                                    onPressed: () => Navigator.pop(context, false),
+                                    onPressed: () => context.pop(false),
                                     child: const Text('Cancel'),
                                   ),
                                   FilledButton(
-                                    onPressed: () => Navigator.pop(context, true),
+                                    onPressed: () => context.pop(true),
                                     style: FilledButton.styleFrom(
                                       backgroundColor: Theme.of(context).colorScheme.error,
                                     ),
@@ -294,7 +295,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   ref.read(settingsProvider.notifier).updateTheme(value);
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -305,7 +306,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   ref.read(settingsProvider.notifier).updateTheme(value);
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -316,7 +317,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   ref.read(settingsProvider.notifier).updateTheme(value);
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -341,7 +342,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   ref.read(settingsProvider.notifier).updateLanguage(value);
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -352,7 +353,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   ref.read(settingsProvider.notifier).updateLanguage(value);
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -363,7 +364,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   ref.read(settingsProvider.notifier).updateLanguage(value);
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -388,7 +389,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   // TODO: Implement currency update
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -399,7 +400,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   // TODO: Implement currency update
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -410,7 +411,7 @@ class SettingsPage extends ConsumerWidget {
               onChanged: (value) {
                 if (value != null) {
                   // TODO: Implement currency update
-                  Navigator.pop(context);
+                  context.pop();
                 }
               },
             ),
@@ -437,13 +438,13 @@ class SettingsPage extends ConsumerWidget {
         ),
         actions: [
           TextButton(
-            onPressed: () => Navigator.pop(context),
+            onPressed: () => context.pop(),
             child: const Text('Cancel'),
           ),
           FilledButton(
             onPressed: () {
               // TODO: Implement store name update
-              Navigator.pop(context);
+              context.pop();
               ScaffoldMessenger.of(context).showSnackBar(
                 const SnackBar(content: Text('Store name updated')),
               );
@@ -476,13 +477,13 @@ class SettingsPage extends ConsumerWidget {
         ),
         actions: [
           TextButton(
-            onPressed: () => Navigator.pop(context),
+            onPressed: () => context.pop(),
             child: const Text('Cancel'),
           ),
           FilledButton(
             onPressed: () {
               // TODO: Implement tax rate update
-              Navigator.pop(context);
+              context.pop();
               ScaffoldMessenger.of(context).showSnackBar(
                 const SnackBar(content: Text('Tax rate updated')),
               );
@@ -521,7 +522,7 @@ class SettingsPage extends ConsumerWidget {
 
     // Close loading dialog
     if (context.mounted) {
-      Navigator.pop(context);
+      context.pop();
       ScaffoldMessenger.of(context).showSnackBar(
         const SnackBar(content: Text('Data synced successfully')),
       );
@@ -538,12 +539,12 @@ class SettingsPage extends ConsumerWidget {
         ),
         actions: [
           TextButton(
-            onPressed: () => Navigator.pop(context),
+            onPressed: () => context.pop(),
             child: const Text('Cancel'),
           ),
           FilledButton(
             onPressed: () {
-              Navigator.pop(context);
+              context.pop();
               ScaffoldMessenger.of(context).showSnackBar(
                 const SnackBar(content: Text('Cache cleared')),
               );

lib/shared/widgets/app_bottom_nav_shell.dart

@@ -0,0 +1,81 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+/// Shell widget that provides bottom navigation for the app
+class AppBottomNavShell extends StatelessWidget {
+  const AppBottomNavShell({
+    super.key,
+    required this.child,
+  });
+
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: child,
+      bottomNavigationBar: _AppBottomNavigationBar(),
+    );
+  }
+}
+
+class _AppBottomNavigationBar extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    final location = GoRouterState.of(context).matchedLocation;
+
+    // Determine current index based on location
+    int currentIndex = 0;
+    if (location == '/') {
+      currentIndex = 0;
+    } else if (location.startsWith('/products')) {
+      currentIndex = 1;
+    } else if (location.startsWith('/categories')) {
+      currentIndex = 2;
+    } else if (location.startsWith('/settings')) {
+      currentIndex = 3;
+    }
+
+    return NavigationBar(
+      selectedIndex: currentIndex,
+      onDestinationSelected: (index) {
+        switch (index) {
+          case 0:
+            context.go('/');
+            break;
+          case 1:
+            context.go('/products');
+            break;
+          case 2:
+            context.go('/categories');
+            break;
+          case 3:
+            context.go('/settings');
+            break;
+        }
+      },
+      destinations: const [
+        NavigationDestination(
+          icon: Icon(Icons.point_of_sale_outlined),
+          selectedIcon: Icon(Icons.point_of_sale),
+          label: 'Home',
+        ),
+        NavigationDestination(
+          icon: Icon(Icons.inventory_2_outlined),
+          selectedIcon: Icon(Icons.inventory_2),
+          label: 'Products',
+        ),
+        NavigationDestination(
+          icon: Icon(Icons.category_outlined),
+          selectedIcon: Icon(Icons.category),
+          label: 'Categories',
+        ),
+        NavigationDestination(
+          icon: Icon(Icons.settings_outlined),
+          selectedIcon: Icon(Icons.settings),
+          label: 'Settings',
+        ),
+      ],
+    );
+  }
+}

pubspec.lock

@@ -472,14 +472,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.0"
-  get_it:
-    dependency: "direct main"
-    description:
-      name: get_it
-      sha256: a4292e7cf67193f8e7c1258203104eb2a51ec8b3a04baa14695f4064c144297b
-      url: "https://pub.dev"
-    source: hosted
-    version: "8.2.0"
   glob:
     dependency: transitive
     description:
@@ -488,6 +480,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.3"
+  go_router:
+    dependency: "direct main"
+    description:
+      name: go_router
+      sha256: f02fd7d2a4dc512fec615529824fdd217fecb3a3d3de68360293a551f21634b3
+      url: "https://pub.dev"
+    source: hosted
+    version: "14.8.1"
   graphs:
     dependency: transitive
     description:

pubspec.yaml

@@ -49,6 +49,9 @@ dependencies:
   flutter_riverpod: ^3.0.0
   riverpod_annotation: ^3.0.0
 
+  # Routing
+  go_router: ^14.6.2
+
   # Network
   dio: ^5.7.0
   connectivity_plus: ^6.1.1