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/common/services/cache_clear_service.dart

@@ -7,6 +7,7 @@ import 'package:package_info_plus/package_info_plus.dart';
 
 import '../../features/web/application/mall_web_host_controller.dart';
 import '../storage/storage_service.dart';
+import '../storage/preferences_storage.dart';
 
 /// Clears only disposable presentation data. Credentials and user preferences
 /// deliberately remain outside this service.
@@ -34,7 +35,8 @@ class CacheClearService {
 /// in SharedPreferences and is removed here without touching user data.
 abstract final class SplashAdControllerPlaceholder {
   static Future<void> clear() async {
-    await StorageService.to.preferences.remove('ads.splash.entry');
-    await StorageService.to.preferences.remove('ads.splash.daily');
+    final preferences = PreferencesStorage(StorageService.to.preferences);
+    await preferences.remove('ads.splash.entry');
+    await preferences.remove('ads.splash.daily');
   }
 }