feat(app): stabilize recommendation flow

lib/presentation/pages/restaurant_list/restaurant_list_screen.dart

@@ -3,6 +3,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:lunchpick/domain/entities/restaurant.dart';
 import '../../../core/constants/app_colors.dart';
 import '../../../core/constants/app_typography.dart';
+import '../../../core/utils/app_logger.dart';
 import '../../providers/restaurant_provider.dart';
 import '../../widgets/category_selector.dart';
 import 'manual_restaurant_input_screen.dart';
@@ -33,11 +34,9 @@ class _RestaurantListScreenState extends ConsumerState<RestaurantListScreen> {
     final searchQuery = ref.watch(searchQueryProvider);
     final selectedCategory = ref.watch(selectedCategoryProvider);
     final isFiltered = searchQuery.isNotEmpty || selectedCategory != null;
-    final restaurantsAsync = ref.watch(
-      isFiltered
-          ? filteredRestaurantsProvider
-          : sortedRestaurantsByDistanceProvider,
-    );
+    final restaurantsAsync = isFiltered
+        ? ref.watch(filteredRestaurantsProvider)
+        : ref.watch(sortedRestaurantsByDistanceProvider);
 
     return Scaffold(
       backgroundColor: isDark
@@ -106,6 +105,9 @@ class _RestaurantListScreenState extends ConsumerState<RestaurantListScreen> {
           Expanded(
             child: restaurantsAsync.when(
               data: (restaurantsData) {
+                AppLogger.debug(
+                  '[restaurant_list_ui] data received, filtered=$isFiltered',
+                );
                 final items = isFiltered
                     ? (restaurantsData as List<Restaurant>)
                           .map(
@@ -132,9 +134,14 @@ class _RestaurantListScreenState extends ConsumerState<RestaurantListScreen> {
                   },
                 );
               },
-              loading: () => const Center(
-                child: CircularProgressIndicator(color: AppColors.lightPrimary),
-              ),
+              loading: () {
+                AppLogger.debug('[restaurant_list_ui] loading...');
+                return const Center(
+                  child: CircularProgressIndicator(
+                    color: AppColors.lightPrimary,
+                  ),
+                );
+              },
               error: (error, stack) => Center(
                 child: Column(
                   mainAxisAlignment: MainAxisAlignment.center,