fix：参考金值，研听，研值工程通用通用工程公共能力，重点对比网络请求、登录认证、状态管理、本地存储、WebView、推送、版本更新、一键登录、主题/UI 等模块，确定后续统一整改方案

lib/features/mall/application/mall_entry_promo_store.dart

@@ -1,17 +1,14 @@
-import 'package:shared_preferences/shared_preferences.dart';
-
+import '../../../common/storage/preferences_storage.dart';
 import '../../../common/storage/storage_keys.dart';
 
 class MallEntryPromoStore {
   const MallEntryPromoStore(this._preferences);
 
-  final SharedPreferences _preferences;
+  final PreferencesStorage _preferences;
 
-  bool get hasOpenedMall =>
-      _preferences.getBool(storageMallEntryPromoOpened) ?? false;
+  bool get hasOpenedMall => _preferences.getBool(storageMallEntryPromoOpened);
 
-  bool get hasSeenHomeBadge =>
-      _preferences.getBool(storageMallHomeBadgeSeen) ?? false;
+  bool get hasSeenHomeBadge => _preferences.getBool(storageMallHomeBadgeSeen);
 
   Future<void> markMallOpened() async {
     await _preferences.setBool(storageMallEntryPromoOpened, true);