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>

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,
     );
   }
@@ -635,27 +637,25 @@ 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(
-                  padding: const EdgeInsets.only(right: 8),
-                  child: OutlinedButton(
-                    onPressed: () => _setPortions(quickValue),
-                    style: OutlinedButton.styleFrom(
-                      padding: const EdgeInsets.symmetric(
-                          horizontal: 12, vertical: 8),
-                      side: BorderSide(
-                        color: _selectedPortions == quickValue
-                            ? theme.colorScheme.primary
-                            : theme.colorScheme.outline,
-                        width: _selectedPortions == quickValue ? 2 : 1,
-                      ),
+                OutlinedButton(
+                  onPressed: () => _setPortions(quickValue),
+                  style: OutlinedButton.styleFrom(
+                    padding: const EdgeInsets.symmetric(
+                        horizontal: 12, vertical: 8),
+                    side: BorderSide(
+                      color: _selectedPortions == quickValue
+                          ? theme.colorScheme.primary
+                          : theme.colorScheme.outline,
+                      width: _selectedPortions == quickValue ? 2 : 1,
                     ),
-                    child: Text(quickValue % 1 == 0
-                        ? quickValue.toInt().toString()
-                        : quickValue.toStringAsFixed(1)),
                   ),
+                  child: Text(quickValue % 1 == 0
+                      ? quickValue.toInt().toString()
+                      : quickValue.toStringAsFixed(1)),
                 ),
             ],
           ),