云同步标签部分

lib/main.dart

@@ -9,6 +9,7 @@ import 'utils/theme/app_theme.dart';
 import 'utils/app_router.dart';
 import 'utils/user_prefs.dart';
 import 'utils/sync/auto_backup_service.dart';
+import 'utils/sync/server_sync_service.dart';
 import 'utils/usage_stats_service.dart';
 import 'providers/app_provider.dart';
 import 'package:flutter/widget_previews.dart';
@@ -18,7 +19,7 @@ void main() async {
   await UserPrefs.init();
   final appProvider = AppProvider();
   runApp(MyApp(appProvider: appProvider));
-  unawaited(appProvider.initDatabase().then((_) => appProvider.initMainTabIndex()));
+  unawaited(_validateSyncOnStartup().then((_) => appProvider.initDatabase().then((_) => appProvider.initMainTabIndex())));
   unawaited(_initAutoBackup());
   unawaited(_initUsageStats());
 }
@@ -42,6 +43,34 @@ Future<void> _initUsageStats() async {
   }
 }
 
+/// 启动时校验同步激活码：有效则继续，过期/失效则下载数据并关闭同步
+Future<void> _validateSyncOnStartup() async {
+  try {
+    final prefs = UserPrefs();
+    if (!prefs.syncEnabled || prefs.syncServerUrl.isEmpty || prefs.syncActivationCode.isEmpty) {
+      return; // 未开启同步，跳过
+    }
+
+    debugPrint('[Startup] 校验同步激活码...');
+    final result = await ServerSyncService.instance.checkActivation();
+
+    if (result != null && result['valid'] == true) {
+      // 激活码有效，更新有效期信息
+      await prefs.setSyncExpiresAt(result['expires_at'] ?? '');
+      await prefs.setSyncIsPermanent(result['is_permanent'] == true);
+      debugPrint('[Startup] 激活码有效，继续同步模式');
+    } else {
+      // 激活码无效/过期，下载服务端数据并关闭同步
+      debugPrint('[Startup] 激活码失效: ${result?['error'] ?? '未知'}，关闭同步并下载数据');
+      await ServerSyncService.instance.downloadToLocal();
+      await prefs.setSyncEnabled(false);
+      debugPrint('[Startup] 已切换到本地模式');
+    }
+  } catch (e) {
+    debugPrint('[Startup] 激活码校验异常: $e');
+  }
+}
+
 class MyApp extends StatefulWidget {
   final AppProvider appProvider;
   const MyApp({super.key, required this.appProvider});