feat: remove recipes section, add redevelopment TODO

The recipes tab (recommendations + saved recipes + detail screen) is
removed from the app UI and all feature files are deleted. The section
will be redesigned from scratch.

- Remove /recipes and /recipe-detail routes from app_router.dart
- Remove Recipes tab from BottomNavigationBar
- Delete client/lib/features/recipes/ entirely
- Keep shared/models/recipe.dart and saved_recipe.dart for later reuse
- Add "Раздел рецептов (переработка с нуля)" section to docs/TODO.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/lib/core/router/app_router.dart

@@ -18,13 +18,9 @@ import '../../features/scan/recognition_confirm_screen.dart';
 import '../../features/scan/recognition_service.dart';
 import '../../features/menu/menu_screen.dart';
 import '../../features/menu/shopping_list_screen.dart';
-import '../../features/recipes/recipe_detail_screen.dart';
-import '../../features/recipes/recipes_screen.dart';
 import '../../features/profile/profile_screen.dart';
 import '../../features/products/user_product_provider.dart';
 import '../../features/scan/recognition_history_screen.dart';
-import '../../shared/models/recipe.dart';
-import '../../shared/models/saved_recipe.dart';
 
 // Notifies GoRouter when auth state or profile state changes.
 class _RouterNotifier extends ChangeNotifier {
@@ -104,20 +100,6 @@ final routerProvider = Provider<GoRouter>((ref) {
         path: '/onboarding',
         builder: (_, __) => const OnboardingScreen(),
       ),
-      // Full-screen recipe detail — shown without the bottom navigation bar.
-      GoRoute(
-        path: '/recipe-detail',
-        builder: (context, state) {
-          final extra = state.extra;
-          if (extra is Recipe) {
-            return RecipeDetailScreen(recipe: extra);
-          }
-          if (extra is SavedRecipe) {
-            return RecipeDetailScreen(saved: extra);
-          }
-          return const _InvalidRoute();
-        },
-      ),
       // Add product — shown without the bottom navigation bar.
       GoRoute(
         path: '/products/add',
@@ -155,8 +137,6 @@ final routerProvider = Provider<GoRouter>((ref) {
               path: '/products',
               builder: (_, __) => const ProductsScreen()),
           GoRoute(path: '/menu', builder: (_, __) => const MenuScreen()),
-          GoRoute(
-              path: '/recipes', builder: (_, __) => const RecipesScreen()),
           GoRoute(
               path: '/profile', builder: (_, __) => const ProfileScreen()),
         ],
@@ -174,18 +154,6 @@ class _SplashScreen extends StatelessWidget {
       );
 }
 
-class _InvalidRoute extends StatelessWidget {
-  const _InvalidRoute();
-
-  @override
-  Widget build(BuildContext context) {
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      if (context.mounted) Navigator.of(context).pop();
-    });
-    return const Scaffold(body: SizedBox.shrink());
-  }
-}
-
 class MainShell extends ConsumerWidget {
   final Widget child;
 
@@ -195,7 +163,6 @@ class MainShell extends ConsumerWidget {
     '/home',
     '/products',
     '/menu',
-    '/recipes',
     '/profile',
   ];
 
@@ -234,10 +201,6 @@ class MainShell extends ConsumerWidget {
             icon: const Icon(Icons.calendar_month),
             label: l10n.menu,
           ),
-          BottomNavigationBarItem(
-            icon: const Icon(Icons.menu_book),
-            label: l10n.navRecipes,
-          ),
           BottomNavigationBarItem(
             icon: const Icon(Icons.person),
             label: l10n.profileTitle,