feat(app): add manual entry and sharing flows

lib/domain/usecases/recommendation_engine.dart

@@ -49,7 +49,10 @@ class RecommendationEngine {
     if (eligibleRestaurants.isEmpty) return null;
 
     // 3단계: 카테고리 필터링
-    final filteredByCategory = _filterByCategory(eligibleRestaurants, config.selectedCategories);
+    final filteredByCategory = _filterByCategory(
+      eligibleRestaurants,
+      config.selectedCategories,
+    );
     if (filteredByCategory.isEmpty) return null;
 
     // 4단계: 가중치 계산 및 선택
@@ -57,7 +60,10 @@ class RecommendationEngine {
   }
 
   /// 거리 기반 필터링
-  List<Restaurant> _filterByDistance(List<Restaurant> restaurants, RecommendationConfig config) {
+  List<Restaurant> _filterByDistance(
+    List<Restaurant> restaurants,
+    RecommendationConfig config,
+  ) {
     // 날씨에 따른 최대 거리 조정
     double effectiveMaxDistance = config.maxDistance;
     if (config.weather != null && config.weather!.current.isRainy) {
@@ -98,7 +104,10 @@ class RecommendationEngine {
   }
 
   /// 카테고리 필터링
-  List<Restaurant> _filterByCategory(List<Restaurant> restaurants, List<String> selectedCategories) {
+  List<Restaurant> _filterByCategory(
+    List<Restaurant> restaurants,
+    List<String> selectedCategories,
+  ) {
     if (selectedCategories.isEmpty) {
       return restaurants;
     }
@@ -108,7 +117,10 @@ class RecommendationEngine {
   }
 
   /// 가중치 기반 선택
-  Restaurant? _selectWithWeights(List<Restaurant> restaurants, RecommendationConfig config) {
+  Restaurant? _selectWithWeights(
+    List<Restaurant> restaurants,
+    RecommendationConfig config,
+  ) {
     if (restaurants.isEmpty) return null;
 
     // 각 식당에 대한 가중치 계산
@@ -116,7 +128,8 @@ class RecommendationEngine {
       double weight = 1.0;
 
       // 카테고리 가중치 적용
-      final categoryWeight = config.userSettings.categoryWeights[restaurant.category];
+      final categoryWeight =
+          config.userSettings.categoryWeights[restaurant.category];
       if (categoryWeight != null) {
         weight *= categoryWeight;
       }
@@ -159,28 +172,23 @@ class RecommendationEngine {
         return 0.3;
       }
     }
-
     // 점심 시간대 (11-14시)
     else if (hour >= 11 && hour < 14) {
-      if (restaurant.category == 'korean' || 
-          restaurant.category == 'chinese' || 
+      if (restaurant.category == 'korean' ||
+          restaurant.category == 'chinese' ||
           restaurant.category == 'japanese') {
         return 1.3;
       }
     }
-
     // 저녁 시간대 (17-21시)
     else if (hour >= 17 && hour < 21) {
-      if (restaurant.category == 'bar' || 
-          restaurant.category == 'western') {
+      if (restaurant.category == 'bar' || restaurant.category == 'western') {
         return 1.2;
       }
     }
-
     // 늦은 저녁 (21시 이후)
     else if (hour >= 21) {
-      if (restaurant.category == 'bar' || 
-          restaurant.category == 'fastfood') {
+      if (restaurant.category == 'bar' || restaurant.category == 'fastfood') {
         return 1.3;
       }
       if (restaurant.category == 'cafe') {
@@ -196,24 +204,21 @@ class RecommendationEngine {
     if (weather.current.isRainy) {
       // 비가 올 때는 가까운 식당 선호
       // 이미 거리 가중치에서 처리했으므로 여기서는 실내 카테고리 선호
-      if (restaurant.category == 'cafe' || 
-          restaurant.category == 'fastfood') {
+      if (restaurant.category == 'cafe' || restaurant.category == 'fastfood') {
         return 1.2;
       }
     }
 
     // 더운 날씨 (25도 이상)
     if (weather.current.temperature >= 25) {
-      if (restaurant.category == 'cafe' || 
-          restaurant.category == 'japanese') {
+      if (restaurant.category == 'cafe' || restaurant.category == 'japanese') {
         return 1.1;
       }
     }
 
     // 추운 날씨 (10도 이하)
     if (weather.current.temperature <= 10) {
-      if (restaurant.category == 'korean' || 
-          restaurant.category == 'chinese') {
+      if (restaurant.category == 'korean' || restaurant.category == 'chinese') {
         return 1.2;
       }
     }
@@ -222,7 +227,9 @@ class RecommendationEngine {
   }
 
   /// 가중치 기반 랜덤 선택
-  Restaurant? _weightedRandomSelection(List<_WeightedRestaurant> weightedRestaurants) {
+  Restaurant? _weightedRandomSelection(
+    List<_WeightedRestaurant> weightedRestaurants,
+  ) {
     if (weightedRestaurants.isEmpty) return null;
 
     // 전체 가중치 합계 계산
@@ -254,4 +261,4 @@ class _WeightedRestaurant {
   final double weight;
 
   _WeightedRestaurant(this.restaurant, this.weight);
-}
+}