优化结构

lib/main.dart

@@ -4,7 +4,6 @@ import 'pages/home_page.dart';
 import 'utils/theme/app_theme.dart';
 import 'utils/app_router.dart';
 import 'utils/user_prefs.dart';
-import 'utils/sync/webdav_service.dart';
 import 'utils/sync/auto_backup_service.dart';
 import 'providers/app_provider.dart';
 import 'package:flutter/widget_previews.dart';
@@ -12,29 +11,19 @@ import 'package:flutter/widget_previews.dart';
 void main() async {
   // 确保 Flutter 绑定初始化完成
   WidgetsFlutterBinding.ensureInitialized();
-  
   // 初始化用户偏好设置
   await UserPrefs.init();
-  
   // 初始化数据库
   final appProvider = AppProvider();
   await appProvider.initDatabase();
-  
-  // 检查并恢复自动备份
+  // 检查并恢复本地自动备份
   await _initAutoBackup();
-  
   runApp(MyApp(appProvider: appProvider));
 }
 
 /// 初始化自动备份
 Future<void> _initAutoBackup() async {
   try {
-    // 初始化 WebDAV 自动同步
-    final isWebDAVEnabled = await WebDAVService.instance.isAutoSyncEnabled();
-    if (isWebDAVEnabled) {
-      await WebDAVService.instance.startAutoSync();
-    }
-    
     // 初始化本地自动备份
     final isLocalAutoBackupEnabled = await AutoBackupService.instance.getEnabled();
     if (isLocalAutoBackupEnabled) {