feat: add pantry management features including repository, providers, and UI integration

flutter/lib/features/pantry/data/pantry_providers.dart

@@ -0,0 +1,28 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../../core/api/api_providers.dart';
+import '../../../core/api/guarded_api_call.dart';
+import '../../auth/data/auth_providers.dart';
+import '../domain/pantry_item.dart';
+import '../domain/pantry_product.dart';
+import 'pantry_repository.dart';
+
+final pantryRepositoryProvider = Provider<PantryRepository>((ref) {
+  return PantryRepository(ref.watch(apiClientProvider));
+});
+
+final pantryProvider = FutureProvider<List<PantryItem>>((ref) async {
+  final token = await ref.watch(authStateProvider.future);
+  return guardedApiCall(
+    ref,
+    () => ref.read(pantryRepositoryProvider).fetchPantry(token: token),
+  );
+});
+
+final pantryProductsProvider = FutureProvider<List<PantryProduct>>((ref) async {
+  final token = await ref.watch(authStateProvider.future);
+  return guardedApiCall(
+    ref,
+    () => ref.read(pantryRepositoryProvider).fetchProducts(token: token),
+  );
+});

flutter/lib/features/pantry/data/pantry_repository.dart

@@ -0,0 +1,39 @@
+import '../../../core/api/api_client.dart';
+import '../../../core/api/api_paths.dart';
+import '../domain/pantry_item.dart';
+import '../domain/pantry_product.dart';
+
+class PantryRepository {
+  final ApiClient _api;
+
+  const PantryRepository(this._api);
+
+  Future<List<PantryItem>> fetchPantry({String? token}) async {
+    final data = await _api.getJson(PantryApiPaths.list, token: token);
+    final list = data as List<dynamic>;
+    return list
+        .map((e) => PantryItem.fromJson(e as Map<String, dynamic>))
+        .toList();
+  }
+
+  Future<List<PantryProduct>> fetchProducts({String? token}) async {
+    final data = await _api.getJson(ProductApiPaths.list, token: token);
+    final list = data as List<dynamic>;
+    return list
+        .map((e) => PantryProduct.fromJson(e as Map<String, dynamic>))
+        .toList();
+  }
+
+  Future<PantryItem> createPantryItem(int productId, {String? token}) async {
+    final data = await _api.postJson(
+      PantryApiPaths.list,
+      body: {'productId': productId},
+      token: token,
+    );
+    return PantryItem.fromJson(data as Map<String, dynamic>);
+  }
+
+  Future<void> deletePantryItem(int id, {String? token}) async {
+    await _api.deleteJson(PantryApiPaths.remove(id), token: token);
+  }
+}