优化主界面显示

lib/main.dart

@@ -26,14 +26,12 @@ void main() async {
   
   // 初始化用户偏好设置
   await UserPrefs.init();
-  // 初始化数据库
   final appProvider = AppProvider();
-  await appProvider.initDatabase();
-  appProvider.initMainTabIndex();
-  // 以下初始化不阻塞界面显示
+  // 先显示界面，后台加载数据
+  runApp(MyApp(appProvider: appProvider));
+  unawaited(appProvider.initDatabase().then((_) => appProvider.initMainTabIndex()));
   unawaited(_initAutoBackup());
   unawaited(_initUsageStats());
-  runApp(MyApp(appProvider: appProvider));
 }
 
 /// 初始化自动备份

lib/pages/sync/server_sync_page.dart

@@ -58,7 +58,7 @@ class _ServerSyncPageState extends State<ServerSyncPage> {
       final exp = _prefs.syncExpiresAt;
       if (exp.isNotEmpty) {
         try {
-          final dt = DateTime.parse(exp);
+          final dt = DateTime.parse(exp).add(const Duration(hours: 8));
           _expiresText = '有效期至 ${dt.year}-${dt.month.toString().padLeft(2, '0')}-${dt.day.toString().padLeft(2, '0')} '
               '${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';
         } catch (_) {

lib/utils/usage_stats_service.dart

@@ -17,7 +17,7 @@ class UsageStatsService with WidgetsBindingObserver {
   final UserPrefs _prefs = UserPrefs();
 
   /// 统计服务器地址，发布前替换为实际地址，置空则禁用
-  static String serverUrl = 'http://192.168.31.48:5000';
+  static String serverUrl = 'http://api.mooknote.iletter.top/';
 
   Timer? _heartbeatTimer;
   bool _started = false;
@@ -54,23 +54,6 @@ class UsageStatsService with WidgetsBindingObserver {
     WidgetsBinding.instance.removeObserver(this);
   }
 
-  /// 获取统计信息（总用户数 / 在线数）
-  static Future<Map<String, dynamic>?> fetchStats() async {
-    if (serverUrl.isEmpty) return null;
-
-    try {
-      final response = await http
-          .get(Uri.parse('$serverUrl/api/stats'))
-          .timeout(const Duration(seconds: 5));
-      if (response.statusCode == 200) {
-        return jsonDecode(response.body) as Map<String, dynamic>;
-      }
-    } catch (_) {
-      // 静默失败
-    }
-    return null;
-  }
-
   // ─── 内部方法 ──────────────────────────────────────────────────────────
 
   /// 确保设备有匿名ID
@@ -106,8 +89,10 @@ class UsageStatsService with WidgetsBindingObserver {
             headers: {'Content-Type': 'application/json'},
             body: jsonEncode({
               'device_hash': deviceId,
-              'device_type': Platform.operatingSystem,       // android/ios/windows/macos/linux
-              'device_name': '${Platform.operatingSystem} ${Platform.operatingSystemVersion}',
+              'device_type':
+                  Platform.operatingSystem, // android/ios/windows/macos/linux
+              'device_name':
+                  '${Platform.operatingSystem} ${Platform.operatingSystemVersion}',
             }),
           )
           .timeout(const Duration(seconds: 5));