feat: implement AI recipe suggestions; add endpoint and UI for generating suggestions based on inventory

flutter/lib/features/recipes/presentation/recipe_detail_screen.dart

@@ -643,29 +643,33 @@ class _IngredientPreviewRow extends StatelessWidget {
     final theme = Theme.of(context);
     final cs = theme.colorScheme;
 
-    final (icon, color) = switch (ingredient.status) {
-      IngredientStatus.enough => (Icons.check_circle_outline, cs.primary),
-      IngredientStatus.unitMismatch => (
-          Icons.swap_horiz,
-          cs.tertiary,
-        ),
-      IngredientStatus.missing => (Icons.cancel_outlined, cs.error),
-    };
+    final (icon, color) = ingredient.fromPantry
+        ? (Icons.kitchen_outlined, cs.secondary)
+        : switch (ingredient.status) {
+            IngredientStatus.enough => (Icons.check_circle_outline, cs.primary),
+            IngredientStatus.unitMismatch => (
+                Icons.swap_horiz,
+                cs.tertiary,
+              ),
+            IngredientStatus.missing => (Icons.cancel_outlined, cs.error),
+          };
 
     final requiredStr =
         '${_fmtQty(ingredient.requiredQuantity)} ${ingredient.requiredUnit}'.trim();
     final availableStr =
         '${_fmtQty(ingredient.availableQuantity)} ${ingredient.requiredUnit}'.trim();
 
-    final subtitle = switch (ingredient.status) {
-      IngredientStatus.enough => 'Tillgängligt: $availableStr',
-      IngredientStatus.missing => ingredient.availableQuantity > 0
-          ? 'Saknar ${_fmtQty(ingredient.missingQuantity)} ${ingredient.requiredUnit} '
-              '(har $availableStr)'
-          : 'Saknas helt',
-      IngredientStatus.unitMismatch =>
-        'Annan enhet i lager – kontrollera manuellt',
-    };
+    final subtitle = ingredient.fromPantry
+        ? 'Finns i skafferiet'
+        : switch (ingredient.status) {
+            IngredientStatus.enough => 'Tillgängligt: $availableStr',
+            IngredientStatus.missing => ingredient.availableQuantity > 0
+                ? 'Saknar ${_fmtQty(ingredient.missingQuantity)} ${ingredient.requiredUnit} '
+                    '(har $availableStr)'
+                : 'Saknas helt',
+            IngredientStatus.unitMismatch =>
+              'Annan enhet i lager – kontrollera manuellt',
+          };
 
     return Padding(
       padding: const EdgeInsets.symmetric(vertical: 4),