fix: show dish calories in search and fix portion sheet layout crash

- DishSearchResult now carries calories_per_serving (backend entity + repo
  LEFT JOIN recipes / MIN / GROUP BY; Flutter model + fromJson)
- _FoodTile.fromDish shows kcal/serving subtitle when available
- _DishPortionSheet quick-select buttons: Row → Wrap to avoid
  BoxConstraints infinite-width crash inside DraggableScrollableSheet

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

backend/internal/domain/dish/entity.go

@@ -65,6 +65,7 @@ type DishSearchResult struct {
 	Name               string   `json:"name"`
 	ImageURL           *string  `json:"image_url,omitempty"`
 	AvgRating          float64  `json:"avg_rating"`
+	CaloriesPerServing *float64 `json:"calories_per_serving,omitempty"`
 }
 
 // CreateRequest is the body used to create a new dish + recipe at once.

backend/internal/domain/dish/repository.go

@@ -111,6 +111,7 @@ func (r *Repository) Search(ctx context.Context, query string, limit int) ([]*Di
 			COALESCE(dt.name, d.name) AS name,
 			d.image_url,
 			d.avg_rating,
+			MIN(r.calories_per_serving) AS calories_per_serving,
 			GREATEST(
 				ts_rank(to_tsvector('english', d.name), plainto_tsquery('english', $1)),
 				ts_rank(to_tsvector('simple',  COALESCE(dt.name, '')), plainto_tsquery('simple', $1)),
@@ -118,6 +119,7 @@ func (r *Repository) Search(ctx context.Context, query string, limit int) ([]*Di
 			) AS rank
 		FROM dishes d
 		LEFT JOIN dish_translations dt ON dt.dish_id = d.id AND dt.lang = $3
+		LEFT JOIN recipes r ON r.dish_id = d.id
 		WHERE (
 			to_tsvector('english', d.name) @@ plainto_tsquery('english', $1)
 			OR to_tsvector('simple', COALESCE(dt.name, '')) @@ plainto_tsquery('simple', $1)
@@ -125,6 +127,7 @@ func (r *Repository) Search(ctx context.Context, query string, limit int) ([]*Di
 			OR dt.name ILIKE '%' || $1 || '%'
 			OR similarity(COALESCE(dt.name, d.name), $1) > 0.3
 		)
+		GROUP BY d.id, dt.name, d.name, d.image_url, d.avg_rating
 		ORDER BY rank DESC
 		LIMIT $2`
 
@@ -138,7 +141,7 @@ func (r *Repository) Search(ctx context.Context, query string, limit int) ([]*Di
 	for rows.Next() {
 		var result DishSearchResult
 		var rank float64
-		if scanError := rows.Scan(&result.ID, &result.Name, &result.ImageURL, &result.AvgRating, &rank); scanError != nil {
+		if scanError := rows.Scan(&result.ID, &result.Name, &result.ImageURL, &result.AvgRating, &result.CaloriesPerServing, &rank); scanError != nil {
 			return nil, fmt.Errorf("scan dish search result: %w", scanError)
 		}
 		results = append(results, &result)

client/lib/features/diary/food_search_service.dart

@@ -7,12 +7,14 @@ class DishSearchResult {
   final String name;
   final String? imageUrl;
   final double avgRating;
+  final double? caloriesPerServing;
 
   const DishSearchResult({
     required this.id,
     required this.name,
     this.imageUrl,
     required this.avgRating,
+    this.caloriesPerServing,
   });
 
   factory DishSearchResult.fromJson(Map<String, dynamic> json) {
@@ -21,6 +23,8 @@ class DishSearchResult {
       name: json['name'] as String,
       imageUrl: json['image_url'] as String?,
       avgRating: (json['avg_rating'] as num?)?.toDouble() ?? 0,
+      caloriesPerServing:
+          (json['calories_per_serving'] as num?)?.toDouble(),
     );
   }
 }

client/lib/features/diary/food_search_sheet.dart

@@ -484,7 +484,9 @@ class _FoodTile extends StatelessWidget {
                   size: 20, color: Colors.green),
             ),
       title: dish.name,
-      subtitle: null,
+      subtitle: dish.caloriesPerServing != null
+          ? '${dish.caloriesPerServing!.toInt()} kcal / serving'
+          : null,
       onTap: onTap,
     );
   }
@@ -635,12 +637,11 @@ class _DishPortionSheetState extends ConsumerState<_DishPortionSheet> {
           const SizedBox(height: 16),
 
           // Quick-select portion buttons
-          Row(
+          Wrap(
+            spacing: 8,
             children: [
               for (final quickValue in [0.5, 1.0, 1.5, 2.0])
-                Padding(
+                OutlinedButton(
-                  padding: const EdgeInsets.only(right: 8),
-                  child: OutlinedButton(
                   onPressed: () => _setPortions(quickValue),
                   style: OutlinedButton.styleFrom(
                     padding: const EdgeInsets.symmetric(
@@ -656,7 +657,6 @@ class _DishPortionSheetState extends ConsumerState<_DishPortionSheet> {
                       ? quickValue.toInt().toString()
                       : quickValue.toStringAsFixed(1)),
                 ),
-                ),
             ],
           ),
           const SizedBox(height: 12),