优化代码结构，修复部分bug

lib/data/database_helper.dart

@@ -159,17 +159,7 @@ class DatabaseHelper {
         await db.execute('ALTER TABLE books ADD COLUMN cover_offset REAL DEFAULT 0');
       }
     }
-    // v16: 确保 cover_offset 列存在（v15 的数据库可能缺少此列）
+    // v16: 已合并到 v15（cover_offset 列的添加逻辑相同，v15 的 PRAGMA 检查已确保幂等）
-    if (oldVersion < 16) {
-      final movieCols = await db.rawQuery('PRAGMA table_info(movies)');
-      if (!movieCols.any((col) => col['name'] == 'cover_offset')) {
-        await db.execute('ALTER TABLE movies ADD COLUMN cover_offset REAL DEFAULT 0');
-      }
-      final bookCols = await db.rawQuery('PRAGMA table_info(books)');
-      if (!bookCols.any((col) => col['name'] == 'cover_offset')) {
-        await db.execute('ALTER TABLE books ADD COLUMN cover_offset REAL DEFAULT 0');
-      }
-    }
     if (oldVersion < 17) {
       await db.execute('ALTER TABLE tags ADD COLUMN is_hidden INTEGER NOT NULL DEFAULT 0');
     }
@@ -248,9 +238,7 @@ class DatabaseHelper {
     if (oldVersion < 26) {
       await _upgradeBooksTableV26(db);
     }
-    if (oldVersion < 27) {
+    // v27: 已合并到 v26（start_date/finish_date 的添加逻辑相同，v26 的 PRAGMA 检查已确保幂等）
-      await _upgradeBooksTableV27(db);
-    }
     if (oldVersion < 28) {
       // 移除 Note Plus 功能，删除 note_plus 表
       await db.execute('DROP TABLE IF EXISTS note_plus');
@@ -341,20 +329,6 @@ class DatabaseHelper {
     }
   }
 
-  /// 升级books表到V27（添加阅读始末日期字段）
-  Future<void> _upgradeBooksTableV27(Database db) async {
-    final columns = await db.rawQuery('PRAGMA table_info(books)');
-    final hasStartDate = columns.any((col) => col['name'] == 'start_date');
-    final hasFinishDate = columns.any((col) => col['name'] == 'finish_date');
-
-    if (!hasStartDate) {
-      await db.execute('ALTER TABLE books ADD COLUMN start_date TEXT');
-    }
-    if (!hasFinishDate) {
-      await db.execute('ALTER TABLE books ADD COLUMN finish_date TEXT');
-    }
-  }
-
   /// 升级books表到V26（添加阅读始末日期字段）
   Future<void> _upgradeBooksTableV26(Database db) async {
     final columns = await db.rawQuery('PRAGMA table_info(books)');
@@ -567,153 +541,159 @@ class DatabaseHelper {
   
   /// 升级notes表到V4
   Future<void> _upgradeNotesTableV4(Database db) async {
-    // 备份旧数据
+    await db.transaction((txn) async {
-    final oldData = await db.query('notes');
+      // 备份旧数据
-    
+      final oldData = await txn.query('notes');
-    // 删除旧表
+
-    await db.execute('DROP TABLE IF EXISTS notes');
+      // 删除旧表
-    
+      await txn.execute('DROP TABLE IF EXISTS notes');
-    // 创建新表
+
-    await db.execute('''
+      // 创建新表
-      CREATE TABLE notes (
+      await txn.execute('''
-        id TEXT PRIMARY KEY,
+        CREATE TABLE notes (
-        title TEXT DEFAULT '',
+          id TEXT PRIMARY KEY,
-        content TEXT NOT NULL,
+          title TEXT DEFAULT '',
-        content_type TEXT DEFAULT 'markdown',
+          content TEXT NOT NULL,
-        tags TEXT,
+          content_type TEXT DEFAULT 'markdown',
-        created_at TEXT NOT NULL,
+          tags TEXT,
-        updated_at TEXT NOT NULL
+          created_at TEXT NOT NULL,
-      )
+          updated_at TEXT NOT NULL
-    ''');
+        )
-    
+      ''');
-    // 迁移旧数据（将title字段恢复）
+
-    for (final row in oldData) {
+      // 迁移旧数据（将title字段恢复）
-      try {
+      for (final row in oldData) {
-        final now = DateTime.now().toIso8601String();
+        try {
-        final title = row['title']?.toString() ?? '';
+          final now = DateTime.now().toIso8601String();
-        final content = row['content']?.toString() ?? '';
+          final title = row['title']?.toString() ?? '';
-        
+          final content = row['content']?.toString() ?? '';
-        await db.insert('notes', {
+
-          'id': row['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
+          await txn.insert('notes', {
-          'title': title,
+            'id': row['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
-          'content': content,
+            'title': title,
-          'content_type': 'markdown',
+            'content': content,
-          'tags': row['tags'] ?? '',
+            'content_type': 'markdown',
-          'created_at': row['created_at']?.toString() ?? now,
+            'tags': row['tags'] ?? '',
-          'updated_at': row['updated_at']?.toString() ?? now,
+            'created_at': row['created_at']?.toString() ?? now,
-        });
+            'updated_at': row['updated_at']?.toString() ?? now,
-      } catch (e) {
+          });
-        debugPrint('[DB] 迁移笔记记录失败: $e');
+        } catch (e) {
+          debugPrint('[DB] 迁移笔记记录失败: $e');
+        }
       }
-    }
+    });
   }
 
   /// 升级books表到V3
   Future<void> _upgradeBooksTableV3(Database db) async {
-    // 备份旧数据
+    await db.transaction((txn) async {
-    final oldData = await db.query('books');
+      // 备份旧数据
-    
+      final oldData = await txn.query('books');
-    // 删除旧表
+
-    await db.execute('DROP TABLE IF EXISTS books');
+      // 删除旧表
-    
+      await txn.execute('DROP TABLE IF EXISTS books');
-    // 创建新表
+
-    await db.execute('''
+      // 创建新表
-      CREATE TABLE books (
+      await txn.execute('''
-        id TEXT PRIMARY KEY,
+        CREATE TABLE books (
-        title TEXT NOT NULL,
+          id TEXT PRIMARY KEY,
-        cover_path TEXT,
+          title TEXT NOT NULL,
-        authors TEXT,
+          cover_path TEXT,
-        alternate_titles TEXT,
+          authors TEXT,
-        publisher TEXT,
+          alternate_titles TEXT,
-        genres TEXT,
+          publisher TEXT,
-        summary TEXT,
+          genres TEXT,
-        rating REAL,
+          summary TEXT,
-        status TEXT NOT NULL,
+          rating REAL,
-        created_at TEXT NOT NULL,
+          status TEXT NOT NULL,
-        updated_at TEXT NOT NULL,
+          created_at TEXT NOT NULL,
-        is_deleted INTEGER DEFAULT 0
+          updated_at TEXT NOT NULL,
-      )
+          is_deleted INTEGER DEFAULT 0
-    ''');
+        )
-    
+      ''');
-    // 迁移旧数据
+
-    for (final row in oldData) {
+      // 迁移旧数据
-      try {
+      for (final row in oldData) {
-        final now = DateTime.now().toIso8601String();
+        try {
-        await db.insert('books', {
+          final now = DateTime.now().toIso8601String();
-          'id': row['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
+          await txn.insert('books', {
-          'title': row['title']?.toString() ?? '',
+            'id': row['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
-          'cover_path': row['cover'],
+            'title': row['title']?.toString() ?? '',
-          'authors': row['author'] != null ? '["${row['author']}"]' : '[]',
+            'cover_path': row['cover'],
-          'alternate_titles': '[]',
+            'authors': row['author'] != null ? '["${row['author']}"]' : '[]',
-          'publisher': null,
+            'alternate_titles': '[]',
-          'genres': '[]',
+            'publisher': null,
-          'summary': row['note'],
+            'genres': '[]',
-          'rating': row['rating'],
+            'summary': row['note'],
-          'status': row['status'] ?? 'want_to_read',
+            'rating': row['rating'],
-          'created_at': now,
+            'status': row['status'] ?? 'want_to_read',
-          'updated_at': now,
+            'created_at': now,
-          'is_deleted': 0,
+            'updated_at': now,
-        });
+            'is_deleted': 0,
-      } catch (e) {
+          });
-        debugPrint('[DB] 迁移书籍记录失败: $e');
+        } catch (e) {
+          debugPrint('[DB] 迁移书籍记录失败: $e');
+        }
       }
-    }
+    });
   }
 
   /// 升级movies表到V2
   Future<void> _upgradeMoviesTableV2(Database db) async {
-    // 备份旧数据
+    await db.transaction((txn) async {
-    final oldData = await db.query('movies');
+      // 备份旧数据
-    
+      final oldData = await txn.query('movies');
-    // 删除旧表
-    await db.execute('DROP TABLE IF EXISTS movies');
-    
-    // 创建新表
-    await db.execute('''
-      CREATE TABLE movies (
-        id TEXT PRIMARY KEY,
-        title TEXT NOT NULL,
-        poster_path TEXT,
-        release_date TEXT,
-        directors TEXT,
-        writers TEXT,
-        actors TEXT,
-        genres TEXT,
-        alternate_titles TEXT,
-        summary TEXT,
-        rating REAL,
-        status TEXT NOT NULL,
-        category TEXT NOT NULL DEFAULT 'movie',
-        created_at TEXT NOT NULL,
-        updated_at TEXT NOT NULL,
-        is_deleted INTEGER DEFAULT 0
-      )
-    ''');
 
-    // 迁移旧数据（尽可能保留）
+      // 删除旧表
-    for (final row in oldData) {
+      await txn.execute('DROP TABLE IF EXISTS movies');
-      try {
+
-        await db.insert('movies', {
+      // 创建新表
-          'id': row['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
+      await txn.execute('''
-          'title': row['title']?.toString() ?? '',
+        CREATE TABLE movies (
-          'poster_path': row['poster_path'],
+          id TEXT PRIMARY KEY,
-          'release_date': null,
+          title TEXT NOT NULL,
-          'directors': '[]',
+          poster_path TEXT,
-          'writers': '[]',
+          release_date TEXT,
-          'actors': '[]',
+          directors TEXT,
-          'genres': '[]',
+          writers TEXT,
-          'alternate_titles': '[]',
+          actors TEXT,
-          'summary': row['note'],
+          genres TEXT,
-          'rating': row['rating'],
+          alternate_titles TEXT,
-          'status': row['status'] ?? 'want_to_watch',
+          summary TEXT,
-          'created_at': row['created_at']?.toString() ?? DateTime.now().toIso8601String(),
+          rating REAL,
-          'updated_at': DateTime.now().toIso8601String(),
+          status TEXT NOT NULL,
-          'is_deleted': row['is_deleted'] ?? 0,
+          category TEXT NOT NULL DEFAULT 'movie',
-        });
+          created_at TEXT NOT NULL,
-      } catch (e) {
+          updated_at TEXT NOT NULL,
-        debugPrint('[DB] 迁移影视记录失败: $e');
+          is_deleted INTEGER DEFAULT 0
+        )
+      ''');
+
+      // 迁移旧数据（尽可能保留）
+      for (final row in oldData) {
+        try {
+          await txn.insert('movies', {
+            'id': row['id']?.toString() ?? DateTime.now().millisecondsSinceEpoch.toString(),
+            'title': row['title']?.toString() ?? '',
+            'poster_path': row['poster_path'],
+            'release_date': null,
+            'directors': '[]',
+            'writers': '[]',
+            'actors': '[]',
+            'genres': '[]',
+            'alternate_titles': '[]',
+            'summary': row['note'],
+            'rating': row['rating'],
+            'status': row['status'] ?? 'want_to_watch',
+            'created_at': row['created_at']?.toString() ?? DateTime.now().toIso8601String(),
+            'updated_at': DateTime.now().toIso8601String(),
+            'is_deleted': row['is_deleted'] ?? 0,
+          });
+        } catch (e) {
+          debugPrint('[DB] 迁移影视记录失败: $e');
+        }
       }
-    }
+    });
   }
 
   // 创建数据库表

lib/data/game/game_dao.dart

@@ -144,6 +144,9 @@ class GameDao {
   // 彻底删除游戏
   Future<int> permanentDeleteGame(String id) => _wrap('permanentDeleteGame', () async {
     final db = await _dbHelper.database;
+    // 清理子记录，防止孤儿数据
+    await db.delete('game_reviews', where: 'game_id = ?', whereArgs: [id]);
+    await db.delete('game_screenshots', where: 'game_id = ?', whereArgs: [id]);
     return await db.delete(
       'games',
       where: 'id = ?',

lib/main.dart

@@ -14,7 +14,6 @@ import 'utils/theme/app_theme.dart';
 import 'utils/app_router.dart';
 import 'utils/user_prefs.dart';
 import 'services/changelog_service.dart';
-import 'services/sync/auto_backup_service.dart';
 import 'services/usage_stats_service.dart';
 import 'providers/app_provider.dart';
 
@@ -42,24 +41,13 @@ Future<void> _bootstrap(AppProvider appProvider) async {
     await appProvider.initDatabase();
   } catch (e) {
     debugPrint('[Startup] 数据库初始化失败: $e');
+    appProvider.markDbInitFailed();
   }
   appProvider.initMainTabIndex();
 
-  unawaited(_initAutoBackup());
   unawaited(_initUsageStats());
 }
 
-Future<void> _initAutoBackup() async {
-  try {
-    final isLocalAutoBackupEnabled = await AutoBackupService.instance.getEnabled();
-    if (isLocalAutoBackupEnabled) {
-      await AutoBackupService.instance.start();
-    }
-  } catch (e) {
-    debugPrint('初始化自动备份失败: $e');
-  }
-}
-
 Future<void> _initUsageStats() async {
   try {
     await UsageStatsService.instance.start();

lib/pages/book/book_detail_page.dart

@@ -1374,14 +1374,16 @@ class _BookDetailPageState extends State<BookDetailPage> {
           ElevatedButton(
             onPressed: () async {
               await context.read<AppProvider>().removeBook(widget.book.id);
-              if (!mounted) return;
+              if (!mounted || !context.mounted) return;
               Navigator.pop(context);
               if (widget.embedded) {
                 context.read<AppProvider>().selectBook(null);
               } else {
                 Navigator.pop(context);
               }
-              ToastUtil.show(context, '已删除');
+              if (mounted && context.mounted) {
+                ToastUtil.show(context, '已删除');
+              }
             },
             style: ElevatedButton.styleFrom(
               backgroundColor: colors.error,

lib/pages/book/book_form_page.dart

@@ -8,6 +8,7 @@ import 'package:provider/provider.dart';
 import 'package:http/http.dart' as http;
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -157,12 +158,14 @@ class _BookFormPageState extends State<BookFormPage> {
                   _halfCard('书名', _titleController.text, Icons.book_outlined, required: true,
                     onTap: () async {
                       final r = await TextInputPanel.show(context: context, title: '书名', initialValue: _titleController.text, hint: '请输入书名');
+                      if (!mounted) return;
                       if (r != null) setState(() => _titleController.text = r);
                     },
                   ),
                   _halfCard('别名', _alternateTitles.isEmpty ? '' : '${_alternateTitles.length}个：${_alternateTitles.join('、')}', Icons.alternate_email_outlined,
                     onTap: () async {
                       final r = await GenreSelectorPage.show(context: context, title: '添加别名', existingTags: [], initialSelected: _alternateTitles, hint: '输入别名');
+                      if (!mounted) return;
                       if (r != null) setState(() => _alternateTitles = r);
                     },
                   ),
@@ -173,6 +176,7 @@ class _BookFormPageState extends State<BookFormPage> {
                       final provider = context.read<AppProvider>();
                       final data = provider.books.map((b) => b.authors).toList();
                       final r = await GenreSelectorPage.show(context: context, title: '选择作者', existingTagsFuture: compute(_collectUnique, data), initialSelected: _authors, hint: '如：余华、莫言');
+                      if (!mounted) return;
                       if (r != null) setState(() => _authors = r);
                     },
                   ),
@@ -181,12 +185,14 @@ class _BookFormPageState extends State<BookFormPage> {
                       final provider = context.read<AppProvider>();
                       final data = provider.books.map((b) => b.translators).toList();
                       final r = await GenreSelectorPage.show(context: context, title: '选择译者', existingTagsFuture: compute(_collectUnique, data), initialSelected: _translators, hint: '如：李继宏、许钧');
+                      if (!mounted) return;
                       if (r != null) setState(() => _translators = r);
                     },
                   ),
                   _halfCard('出版社', _publisherController.text, Icons.business_outlined,
                     onTap: () async {
                       final r = await TextInputPanel.show(context: context, title: '出版社', initialValue: _publisherController.text, hint: '请输入出版社');
+                      if (!mounted) return;
                       if (r != null) setState(() => _publisherController.text = r);
                     },
                   ),
@@ -198,12 +204,14 @@ class _BookFormPageState extends State<BookFormPage> {
                       final tags = await provider.getTags('book_genre', excludeHidden: true);
                       if (!mounted) return;
                       final r = await GenreSelectorPage.show(context: context, title: '选择类型', existingTags: tags.map((t) => t['name'] as String).toList(), initialSelected: _genres, hint: '如：小说、历史、传记');
+                      if (!mounted) return;
                       if (r != null) setState(() => _genres = r);
                     },
                   ),
                   _halfCard('ISBN', _isbnController.text, Icons.qr_code_outlined,
                     onTap: () async {
                       final r = await TextInputPanel.show(context: context, title: 'ISBN', initialValue: _isbnController.text, hint: '请输入ISBN编号');
+                      if (!mounted) return;
                       if (r != null) setState(() => _isbnController.text = r);
                     },
                   ),
@@ -425,10 +433,11 @@ class _BookFormPageState extends State<BookFormPage> {
       final picked = await _picker.pickImage(source: ImageSource.gallery, maxWidth: 800, maxHeight: 1200, imageQuality: 85);
       if (picked != null) {
         final fileName = 'cover_${DateTime.now().millisecondsSinceEpoch}.jpg';
-        final bookId = widget.book?.id ?? DateTime.now().millisecondsSinceEpoch.toString();
+        final bookId = widget.book?.id ?? const Uuid().v4();
         final targetPath = await ImagePathHelper.instance.getBookCoverPath(bookId, fileName);
         await ImagePathHelper.instance.ensureDirExists(p.dirname(targetPath));
         await File(picked.path).copy(targetPath);
+        if (!mounted) return;
         setState(() => _coverPath = targetPath);
       }
     } catch (e) {
@@ -492,10 +501,11 @@ class _BookFormPageState extends State<BookFormPage> {
       if (response.bodyBytes.length > 10 * 1024 * 1024) throw Exception('图片太大');
 
       final fileName = 'cover_${DateTime.now().millisecondsSinceEpoch}.jpg';
-      final bookId = widget.book?.id ?? DateTime.now().millisecondsSinceEpoch.toString();
+      final bookId = widget.book?.id ?? const Uuid().v4();
       final targetPath = await ImagePathHelper.instance.getBookCoverPath(bookId, fileName);
       await ImagePathHelper.instance.ensureDirExists(p.dirname(targetPath));
       await File(targetPath).writeAsBytes(response.bodyBytes);
+      if (!mounted) return;
       setState(() => _coverPath = targetPath);
     } catch (e) {
       debugPrint('封面下载失败: $e');
@@ -556,21 +566,25 @@ class _BookFormPageState extends State<BookFormPage> {
 
   Future<void> _selectPublishDate() async {
     final picked = await showDatePicker(context: context, initialDate: _publishDate ?? DateTime.now(), firstDate: DateTime(1900), lastDate: DateTime.now().add(const Duration(days: 365 * 5)));
+    if (!mounted) return;
     if (picked != null) setState(() => _publishDate = picked);
   }
 
   Future<void> _selectStartDate() async {
     final picked = await showDatePicker(context: context, initialDate: _startDate ?? DateTime.now(), firstDate: DateTime(1900), lastDate: DateTime.now().add(const Duration(days: 365 * 5)));
+    if (!mounted) return;
     if (picked != null) setState(() => _startDate = picked);
   }
 
   Future<void> _selectFinishDate() async {
     final picked = await showDatePicker(context: context, initialDate: _finishDate ?? DateTime.now(), firstDate: DateTime(1900), lastDate: DateTime.now().add(const Duration(days: 365 * 5)));
+    if (!mounted) return;
     if (picked != null) setState(() => _finishDate = picked);
   }
 
   Future<void> _editSummary() async {
     final result = await Navigator.push<String>(context, MaterialPageRoute(builder: (_) => _SummaryEditorPage(initialText: _summaryController.text)));
+    if (!mounted) return;
     if (result != null) setState(() => _summaryController.text = result);
   }
 
@@ -619,7 +633,7 @@ class _BookFormPageState extends State<BookFormPage> {
       final now = DateTime.now();
 
       if (widget.book == null) {
-        final newBookId = now.millisecondsSinceEpoch.toString();
+        final newBookId = const Uuid().v4();
         String? finalCoverPath;
         if (_coverPath != null && _coverPath!.isNotEmpty) {
           finalCoverPath = await _moveCoverToNewId(_coverPath!, newBookId);

lib/pages/book/book_review_form_page.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 
@@ -313,7 +314,7 @@ class _BookReviewFormPageState extends State<BookReviewFormPage> {
 
       if (widget.review == null) {
         final newReview = BookReview(
-          id: now.millisecondsSinceEpoch.toString(),
+          id: const Uuid().v4(),
           bookId: widget.bookId,
           content: _contentController.text.trim(),
           reviewer: _reviewerController.text.trim(),

lib/pages/book/book_tab_page.dart

@@ -295,7 +295,7 @@ class _BookTabPageState extends State<BookTabPage> {
           style: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.6), height: 1.5)),
       actions: [
         TextButton(onPressed: () => Navigator.pop(ctx), child: Text('取消', style: TextStyle(color: colors.onSurface.withValues(alpha: 0.6)))),
-        ElevatedButton(onPressed: () async { await context.read<AppProvider>().removeBook(book.id); Navigator.pop(ctx); _loadFirst(); },
+        ElevatedButton(onPressed: () async { await context.read<AppProvider>().removeBook(book.id); if (!ctx.mounted) return; Navigator.pop(ctx); if (mounted) _loadFirst(); },
           style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
               shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)), padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8)),
           child: const Text('删除'),

lib/pages/game/game_detail_page.dart

@@ -960,7 +960,7 @@ class _GameDetailPageState extends State<GameDetailPage> {
             onPressed: () async {
               final provider = context.read<AppProvider>();
               await provider.removeGame(widget.game.id);
-              if (!mounted) return;
+              if (!mounted || !context.mounted) return;
               if (widget.embedded) {
                 Navigator.of(context).pop();
                 provider.selectGame(null);
@@ -969,7 +969,7 @@ class _GameDetailPageState extends State<GameDetailPage> {
                 navigator.pop();
                 navigator.pop();
               }
-              if (mounted) {
+              if (mounted && context.mounted) {
                 ToastUtil.show(context, '已删除');
               }
             },

lib/pages/game/game_form_page.dart

@@ -8,6 +8,7 @@ import 'package:path/path.dart' as p;
 import 'package:provider/provider.dart';
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -185,6 +186,7 @@ class _GameFormPageState extends State<GameFormPage> {
                           initialValue: _titleController.text,
                           hint: '请输入游戏名称',
                         );
+                        if (!mounted) return;
                         if (result != null) setState(() => _titleController.text = result);
                       },
                     ),
@@ -210,6 +212,7 @@ class _GameFormPageState extends State<GameFormPage> {
                           initialSelected: _platforms,
                           hint: '如：PS5、Switch、Steam',
                         );
+                        if (!mounted) return;
                         if (result != null) setState(() => _platforms = result);
                       },
                     ),
@@ -235,6 +238,7 @@ class _GameFormPageState extends State<GameFormPage> {
                           initialSelected: _versions,
                           hint: '如：标准版、豪华版',
                         );
+                        if (!mounted) return;
                         if (result != null) setState(() => _versions = result);
                       },
                     ),
@@ -269,6 +273,7 @@ class _GameFormPageState extends State<GameFormPage> {
                           initialSelected: _genres,
                           hint: '如：RPG、动作、冒险',
                         );
+                        if (!mounted) return;
                         if (result != null) setState(() => _genres = result);
                       },
                     ),
@@ -305,6 +310,7 @@ class _GameFormPageState extends State<GameFormPage> {
                           initialSelected: _purchasePlatforms,
                           hint: '如：Steam、eShop、PlayStation Store',
                         );
+                        if (!mounted) return;
                         if (result != null) setState(() => _purchasePlatforms = result);
                       },
                     ),
@@ -344,6 +350,7 @@ class _GameFormPageState extends State<GameFormPage> {
                           hint: '如：298元、49.99美元',
                           keyboardType: TextInputType.text,
                         );
+                        if (!mounted) return;
                         if (result != null) setState(() => _purchasePriceController.text = result);
                       },
                     ),
@@ -496,6 +503,7 @@ class _GameFormPageState extends State<GameFormPage> {
         builder: (_) => _SummaryEditorPage(initialText: _summaryController.text),
       ),
     );
+    if (!mounted) return;
     if (result != null) {
       setState(() => _summaryController.text = result);
     }
@@ -753,10 +761,11 @@ class _GameFormPageState extends State<GameFormPage> {
 
       if (pickedFile != null) {
         final fileName = 'cover_${DateTime.now().millisecondsSinceEpoch}.jpg';
-        final gameId = widget.game?.id ?? DateTime.now().millisecondsSinceEpoch.toString();
+        final gameId = widget.game?.id ?? const Uuid().v4();
         final targetPath = await ImagePathHelper.instance.getGameCoverPath(gameId, fileName);
         await ImagePathHelper.instance.ensureDirExists(p.dirname(targetPath));
         await File(pickedFile.path).copy(targetPath);
+        if (!mounted) return;
         setState(() => _coverPath = targetPath);
       }
     } catch (e) {
@@ -919,11 +928,12 @@ class _GameFormPageState extends State<GameFormPage> {
       if (response.bodyBytes.length > 10 * 1024 * 1024) throw Exception('图片太大');
 
       final fileName = 'cover_${DateTime.now().millisecondsSinceEpoch}.jpg';
-      final gameId = widget.game?.id ?? DateTime.now().millisecondsSinceEpoch.toString();
+      final gameId = widget.game?.id ?? const Uuid().v4();
       final targetPath = await ImagePathHelper.instance.getGameCoverPath(gameId, fileName);
       await ImagePathHelper.instance.ensureDirExists(p.dirname(targetPath));
       await File(targetPath).writeAsBytes(response.bodyBytes);
 
+      if (!mounted) return;
       setState(() => _coverPath = targetPath);
     } catch (e) {
       debugPrint('封面下载失败: $e');
@@ -1009,6 +1019,7 @@ class _GameFormPageState extends State<GameFormPage> {
       lastDate: DateTime.now().add(const Duration(days: 365 * 5)),
       builder: (context, child) => child!,
     );
+    if (!mounted) return;
     if (picked != null) {
       setState(() => _purchaseDate = picked);
     }
@@ -1073,7 +1084,7 @@ class _GameFormPageState extends State<GameFormPage> {
       final now = DateTime.now();
 
       if (widget.game == null) {
-        final newGameId = now.millisecondsSinceEpoch.toString();
+        final newGameId = const Uuid().v4();
         String? finalCoverPath;
         if (_coverPath != null && _coverPath!.isNotEmpty) {
           finalCoverPath = await _moveCoverToNewId(_coverPath!, newGameId);

lib/pages/game/game_review_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 
@@ -235,7 +236,7 @@ class _GameReviewFormPageState extends State<GameReviewFormPage> {
       final now = DateTime.now();
       if (widget.review == null) {
         final newReview = GameReview(
-          id: now.millisecondsSinceEpoch.toString(),
+          id: const Uuid().v4(),
           gameId: widget.gameId,
           content: _contentController.text.trim(),
           reviewer: _reviewerController.text.trim(),

lib/pages/game/game_screenshots_page.dart

@@ -7,6 +7,7 @@ import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
 import 'package:http/http.dart' as http;
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -230,7 +231,7 @@ class _GameScreenshotsPageState extends State<GameScreenshotsPage> {
         await File(pickedFile.path).copy(targetPath);
 
         final newScreenshot = GameScreenshot(
-          id: DateTime.now().millisecondsSinceEpoch.toString(),
+          id: const Uuid().v4(),
           gameId: widget.game.id,
           screenshotPath: targetPath,
           createdAt: DateTime.now(),
@@ -317,7 +318,7 @@ class _GameScreenshotsPageState extends State<GameScreenshotsPage> {
       await File(targetPath).writeAsBytes(response.bodyBytes);
 
       final newScreenshot = GameScreenshot(
-        id: DateTime.now().millisecondsSinceEpoch.toString(),
+        id: const Uuid().v4(),
         gameId: widget.game.id,
         screenshotPath: targetPath,
         createdAt: DateTime.now(),

lib/pages/game/game_tab_page.dart

@@ -446,8 +446,9 @@ class _GameTabPageState extends State<GameTabPage> {
           ElevatedButton(
             onPressed: () async {
               await context.read<AppProvider>().removeGame(game.id);
+              if (!ctx.mounted) return;
               Navigator.pop(ctx);
-              _loadFirst();
+              if (mounted) _loadFirst();
             },
             style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
                 shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),

lib/pages/home/main_content_page.dart

@@ -45,12 +45,19 @@ class _MainContentPageState extends State<MainContentPage> {
   }
 
   void _loadTabSettings() {
-    setState(() {
+    final newMovie = _userPrefs.showMovieTab;
-      _showMovieTab = _userPrefs.showMovieTab;
+    final newBook = _userPrefs.showBookTab;
-      _showBookTab = _userPrefs.showBookTab;
+    final newNote = _userPrefs.showNoteTab;
-      _showNoteTab = _userPrefs.showNoteTab;
+    final newGame = _userPrefs.showGameTab;
-      _showGameTab = _userPrefs.showGameTab;
+    if (newMovie != _showMovieTab || newBook != _showBookTab ||
-    });
+        newNote != _showNoteTab || newGame != _showGameTab) {
+      setState(() {
+        _showMovieTab = newMovie;
+        _showBookTab = newBook;
+        _showNoteTab = newNote;
+        _showGameTab = newGame;
+      });
+    }
   }
 
   @override

lib/pages/movies/movie_detail_page.dart

@@ -1189,7 +1189,7 @@ class _MovieDetailPageState extends State<MovieDetailPage> {
             onPressed: () async {
               final provider = context.read<AppProvider>();
               await provider.removeMovie(widget.movie.id);
-              if (!mounted) return;
+              if (!mounted || !context.mounted) return;
               if (widget.embedded) {
                 Navigator.of(context).pop(); // close dialog
                 provider.selectMovie(null);
@@ -1198,7 +1198,7 @@ class _MovieDetailPageState extends State<MovieDetailPage> {
                 navigator.pop();
                 navigator.pop();
               }
-              if (mounted) {
+              if (mounted && context.mounted) {
                 ToastUtil.show(context, '已删除');
               }
             },

lib/pages/movies/movie_form_page.dart

@@ -8,6 +8,7 @@ import 'package:provider/provider.dart';
 import 'package:http/http.dart' as http;
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -256,6 +257,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
       arguments: url,
     );
 
+    if (!mounted) return;
     // 处理返回的影视信息
     if (result != null && result is Map<String, dynamic>) {
       _fillMovieInfo(result);
@@ -353,7 +355,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
       if (response.bodyBytes.length > 10 * 1024 * 1024) throw Exception('图片太大');
 
       final fileName = 'poster_${DateTime.now().millisecondsSinceEpoch}.jpg';
-      final movieId = widget.movie?.id ?? DateTime.now().millisecondsSinceEpoch.toString();
+      final movieId = widget.movie?.id ?? const Uuid().v4();
       final targetPath = await ImagePathHelper.instance.getMoviePosterPath(movieId, fileName);
       await ImagePathHelper.instance.ensureDirExists(p.dirname(targetPath));
       await File(targetPath).writeAsBytes(response.bodyBytes);
@@ -436,6 +438,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
                         initialValue: _titleController.text,
                         hint: '请输入影视名称',
                       );
+                      if (!mounted) return;
                       if (result != null) setState(() => _titleController.text = result);
                     },
                   ),
@@ -458,6 +461,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
                         initialSelected: _alternateTitles,
                         hint: '输入别名',
                       );
+                      if (!mounted) return;
                       if (result != null) setState(() => _alternateTitles = result);
                     },
                   ),
@@ -483,6 +487,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
                         initialSelected: _directors,
                         hint: '如：张艺谋、李安',
                       );
+                      if (!mounted) return;
                       if (result != null) setState(() => _directors = result);
                     },
                   ),
@@ -506,6 +511,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
                         initialSelected: _writers,
                         hint: '如：刘慈欣、王家卫',
                       );
+                      if (!mounted) return;
                       if (result != null) setState(() => _writers = result);
                     },
                   ),
@@ -531,6 +537,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
                         initialSelected: _actors,
                         hint: '如：梁朝伟、周星驰',
                       );
+                      if (!mounted) return;
                       if (result != null) setState(() => _actors = result);
                     },
                   ),
@@ -556,6 +563,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
                         initialSelected: _genres,
                         hint: '如：剧情、科幻、悬疑',
                       );
+                      if (!mounted) return;
                       if (result != null) setState(() => _genres = result);
                     },
                   ),
@@ -734,6 +742,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
         builder: (_) => _SummaryEditorPage(initialText: _summaryController.text),
       ),
     );
+    if (!mounted) return;
     if (result != null) {
       setState(() => _summaryController.text = result);
     }
@@ -1144,7 +1153,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
         final fileName = 'poster_${DateTime.now().millisecondsSinceEpoch}.jpg';
 
         // 如果是编辑模式，使用现有影视ID；如果是新建模式，使用临时ID（保存时会替换）
-        final movieId = widget.movie?.id ?? DateTime.now().millisecondsSinceEpoch.toString();
+        final movieId = widget.movie?.id ?? const Uuid().v4();
 
         // 保存到新的路径结构: images/movies/{movieId}/{fileName}
         final targetPath = await ImagePathHelper.instance.getMoviePosterPath(
@@ -1155,6 +1164,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
 
         await File(pickedFile.path).copy(targetPath);
 
+        if (!mounted) return;
         setState(() => _posterPath = targetPath);
       }
     } catch (e) {
@@ -1237,6 +1247,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
       builder: (context, child) => child!,
     );
 
+    if (!mounted) return;
     if (picked != null) {
       setState(() => _releaseDate = picked);
     }
@@ -1252,6 +1263,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
       builder: (context, child) => child!,
     );
 
+    if (!mounted) return;
     if (picked != null) {
       setState(() => _watchDate = picked);
     }
@@ -1321,7 +1333,7 @@ class _MovieFormPageState extends State<MovieFormPage> {
 
     if (widget.movie == null) {
       // 生成新的影视ID
-      final newMovieId = now.millisecondsSinceEpoch.toString();
+      final newMovieId = const Uuid().v4();
 
       // 如果有海报，需要移动到正确的ID目录
       String? finalPosterPath;

lib/pages/movies/movie_posters_page.dart

@@ -7,6 +7,7 @@ import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
 import 'package:http/http.dart' as http;
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -286,7 +287,7 @@ class _MoviePostersPageState extends State<MoviePostersPage> {
         await File(pickedFile.path).copy(targetPath);
 
         final newPoster = MoviePoster(
-          id: DateTime.now().millisecondsSinceEpoch.toString(),
+          id: const Uuid().v4(),
           movieId: widget.movie.id,
           posterPath: targetPath,
           createdAt: DateTime.now(),
@@ -423,7 +424,7 @@ class _MoviePostersPageState extends State<MoviePostersPage> {
       await File(targetPath).writeAsBytes(response.bodyBytes);
 
       final newPoster = MoviePoster(
-        id: DateTime.now().millisecondsSinceEpoch.toString(),
+        id: const Uuid().v4(),
         movieId: widget.movie.id,
         posterPath: targetPath,
         createdAt: DateTime.now(),

lib/pages/movies/movie_review_form_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../../providers/app_provider.dart';
 import '../../widgets/fade_in_local_image.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 
@@ -307,7 +308,7 @@ class _MovieReviewFormPageState extends State<MovieReviewFormPage> {
 
     if (widget.review == null) {
       final newReview = MovieReview(
-        id: now.millisecondsSinceEpoch.toString(),
+        id: const Uuid().v4(),
         movieId: widget.movieId,
         content: _contentController.text.trim(),
         reviewer: _reviewerController.text.trim(),

lib/pages/movies/movie_tab_page.dart

@@ -447,8 +447,9 @@ class _MovieTabPageState extends State<MovieTabPage> {
           ElevatedButton(
             onPressed: () async {
               await context.read<AppProvider>().removeMovie(movie.id);
+              if (!ctx.mounted) return;
               Navigator.pop(ctx);
-              _loadFirst();
+              if (mounted) _loadFirst();
             },
             style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
                 shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),

lib/pages/note/note_form_page.dart

@@ -6,6 +6,7 @@ import 'package:image_picker/image_picker.dart';
 import 'package:path/path.dart' as p;
 import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
 import '../../providers/app_provider.dart';
+import 'package:uuid/uuid.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -97,7 +98,7 @@ class _NoteFormPageState extends State<NoteFormPage> {
         await context.read<AppProvider>().updateNote(updatedNote);
         _savedNote = updatedNote;
       } else {
-        final noteId = now.millisecondsSinceEpoch.toString();
+        final noteId = const Uuid().v4();
         List<String> finalImages = [];
         if (_images.isNotEmpty) {
           final oldNoteId = _tempNoteId ?? noteId;
@@ -701,7 +702,7 @@ class _NoteFormPageState extends State<NoteFormPage> {
       await context.read<AppProvider>().updateNote(updatedNote);
     } else {
       // 添加新笔记
-      final noteId = now.millisecondsSinceEpoch.toString();
+      final noteId = const Uuid().v4();
 
       // 如果有图片，需要移动到正确的ID目录
       List<String> finalImages = [];
@@ -799,7 +800,7 @@ class _NoteFormPageState extends State<NoteFormPage> {
           noteId = widget.note!.id;
         } else {
           // 新建模式：使用已存在的临时ID或生成新的
-          noteId = _tempNoteId ?? DateTime.now().millisecondsSinceEpoch.toString();
+          noteId = _tempNoteId ?? const Uuid().v4();
           _tempNoteId = noteId;
         }
 
@@ -810,10 +811,11 @@ class _NoteFormPageState extends State<NoteFormPage> {
 
         await File(image.path).copy(targetPath);
 
+        if (!mounted) return;
         setState(() => _images.add(targetPath));
       }
     } catch (e) {
-      ToastUtil.show(context, '选择图片失败: $e');
+      if (mounted) ToastUtil.show(context, '选择图片失败: $e');
     }
   }
 

lib/pages/note/note_tab_page.dart

@@ -392,7 +392,7 @@ class _NoteTabPageState extends State<NoteTabPage> {
           TextButton(onPressed: () => Navigator.pop(ctx),
             child: Text('取消', style: TextStyle(color: colors.onSurface.withValues(alpha: 0.6)))),
           ElevatedButton(
-            onPressed: () async { await context.read<AppProvider>().removeNote(note.id); Navigator.pop(ctx); _loadFirst(); },
+            onPressed: () async { await context.read<AppProvider>().removeNote(note.id); if (!ctx.mounted) return; Navigator.pop(ctx); if (mounted) _loadFirst(); },
             style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
                 shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
                 padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8)),

lib/pages/sync/backup_page.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../../providers/app_provider.dart';
 import '../../services/sync/backup_service.dart';
-import '../../services/sync/auto_backup_service.dart';
 import '../../utils/toast_util.dart';
 
 /// 本地备份页面
@@ -16,27 +15,6 @@ class BackupPage extends StatefulWidget {
 class _BackupPageState extends State<BackupPage> {
   bool _isExporting = false;
   bool _isImporting = false;
-  bool _autoBackupEnabled = false;
-  bool _isLoading = true;
-  String? _backupDirPath;
-
-  @override
-  void initState() {
-    super.initState();
-    _loadAutoBackupStatus();
-  }
-
-  Future<void> _loadAutoBackupStatus() async {
-    final enabled = await AutoBackupService.instance.getEnabled();
-    final dirPath = await AutoBackupService.instance.getBackupDirectoryPath();
-    if (mounted) {
-      setState(() {
-        _autoBackupEnabled = enabled;
-        _backupDirPath = dirPath;
-        _isLoading = false;
-      });
-    }
-  }
 
   @override
   Widget build(BuildContext context) {
@@ -46,16 +24,9 @@ class _BackupPageState extends State<BackupPage> {
       appBar: AppBar(
         title: const Text('本地备份'),
       ),
-      body: _isLoading
+      body: ListView(
-          ? const Center(child: CircularProgressIndicator())
-          : ListView(
               padding: const EdgeInsets.all(20),
               children: [
-                // 自动备份开关 - 紧凑一行
-                _buildAutoBackupSection(colors),
-
-                const SizedBox(height: 20),
-
                 // 手动备份
                 _buildSectionTitle(colors, '手动备份'),
                 const SizedBox(height: 10),
@@ -492,74 +463,4 @@ class _BackupPageState extends State<BackupPage> {
       }
     }
   }
-
-  /// 构建自动备份区域 - 紧凑一行
-  Widget _buildAutoBackupSection(ColorScheme colors) {
-    return Container(
-      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
-      decoration: BoxDecoration(
-        color: colors.surfaceContainerHigh,
-        borderRadius: BorderRadius.circular(12),
-        border: Border.all(color: colors.outline, width: 0.5),
-      ),
-      child: Row(
-        children: [
-          Container(
-            width: 32,
-            height: 32,
-            decoration: BoxDecoration(
-              color: colors.surfaceContainerHighest,
-              borderRadius: BorderRadius.circular(10),
-            ),
-            child: Icon(Icons.schedule,
-                size: 18, color: colors.onSurface.withValues(alpha: 0.6)),
-          ),
-          const SizedBox(width: 10),
-          Expanded(
-            child: _backupDirPath != null && _autoBackupEnabled
-                ? Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
-                      Text(
-                        '自动本地备份',
-                        style: TextStyle(
-                            fontSize: 13, fontWeight: FontWeight.w500, color: colors.onSurface),
-                      ),
-                      const SizedBox(height: 2),
-                      Text(
-                        _backupDirPath!,
-                        style:
-                            TextStyle(fontSize: 11, color: colors.onSurface.withValues(alpha: 0.4)),
-                        maxLines: 1,
-                        overflow: TextOverflow.ellipsis,
-                      ),
-                    ],
-                  )
-                : Text(
-                    '自动本地备份',
-                    style: TextStyle(
-                        fontSize: 13, fontWeight: FontWeight.w500, color: colors.onSurface),
-                  ),
-          ),
-          Switch(
-            value: _autoBackupEnabled,
-            onChanged: (value) async {
-              setState(() => _autoBackupEnabled = value);
-              await AutoBackupService.instance.setEnabled(value);
-              if (value) {
-                ToastUtil.show(context, '自动备份已开启');
-              } else {
-                ToastUtil.show(context, '自动备份已关闭');
-              }
-              await _loadAutoBackupStatus();
-            },
-            activeThumbColor: colors.primary,
-            activeTrackColor: colors.primary.withValues(alpha: 0.3),
-            inactiveThumbColor: colors.surface,
-            inactiveTrackColor: colors.outline,
-          ),
-        ],
-      ),
-    );
-  }
 }

lib/providers/app_provider.dart

@@ -101,19 +101,58 @@ class AppProvider extends ChangeNotifier {
   String? _lastEditedItemId;
   String? get lastEditedItemId => _lastEditedItemId;
 
+  // 数据库初始化失败标志
+  bool _dbInitFailed = false;
+  bool get dbInitFailed => _dbInitFailed;
+
+  /// 标记数据库初始化失败（供 UI 提示重试）
+  void markDbInitFailed() {
+    _dbInitFailed = true;
+    notifyListeners();
+  }
+
+  /// 重试数据库初始化
+  Future<void> retryInitDatabase() async {
+    _dbInitFailed = false;
+    notifyListeners();
+    await initDatabase();
+  }
+
   // 初始化数据库
   Future<void> initDatabase() async {
     debugPrint('[AppProvider] initDatabase');
-    final results = await Future.wait([
+    // 独立加载每个 DAO，避免一个失败导致全部中断
-      _movieDao.getAllMovies(),
+    try {
-      _bookDao.getAllBooks(),
+      _movies = await _movieDao.getAllMovies();
-      _noteDao.getAllNotes(),
+    } catch (e) {
-      _gameDao.getAllGames(),
+      debugPrint('[AppProvider] 加载影视数据失败: $e');
-    ]);
+    }
-    _movies = results[0] as List<Movie>;
+    try {
-    _books = results[1] as List<Book>;
+      _books = await _bookDao.getAllBooks();
-    _notes = results[2] as List<Note>;
+    } catch (e) {
-    _games = results[3] as List<Game>;
+      debugPrint('[AppProvider] 加载书籍数据失败: $e');
+    }
+    try {
+      _notes = await _noteDao.getAllNotes();
+    } catch (e) {
+      debugPrint('[AppProvider] 加载笔记数据失败: $e');
+    }
+    try {
+      _games = await _gameDao.getAllGames();
+    } catch (e) {
+      debugPrint('[AppProvider] 加载游戏数据失败: $e');
+    }
+    // 检查是否全部失败
+    if (_movies.isEmpty && _books.isEmpty && _notes.isEmpty && _games.isEmpty) {
+      // 可能是初始化全部失败（非空数据库场景下不合理），标记以便 UI 提示
+      try {
+        final db = await DatabaseHelper.instance.database;
+        final count = (await db.rawQuery('SELECT COUNT(*) as cnt FROM movies')).first['cnt'] as int;
+        if (count > 0) _dbInitFailed = true;
+      } catch (_) {
+        _dbInitFailed = true;
+      }
+    }
     debugPrint('[AppProvider] 本地数据: movies=${_movies.length}, books=${_books.length}, notes=${_notes.length}, games=${_games.length}');
     notifyListeners();
   }
@@ -387,12 +426,15 @@ class AppProvider extends ChangeNotifier {
   // 添加影视记录
   Future<void> addMovie(Movie movie) async {
     await _movieDao.insertMovie(movie);
-    await loadMovies();
+    _movies.add(movie);
+    notifyListeners();
   }
 
   Future<void> updateMovie(Movie movie) async {
     await _movieDao.updateMovie(movie);
-    await loadMovies();
+    final idx = _movies.indexWhere((m) => m.id == movie.id);
+    if (idx != -1) _movies[idx] = movie;
+    notifyListeners();
   }
 
   /// 仅更新封面偏移量（不触发全量刷新）
@@ -417,52 +459,65 @@ class AppProvider extends ChangeNotifier {
 
   Future<void> removeMovie(String id) async {
     await _movieDao.deleteMovie(id);
-    await loadMovies();
+    _movies.removeWhere((m) => m.id == id);
+    notifyListeners();
   }
 
   Future<void> addBook(Book book) async {
     await _bookDao.insertBook(book);
-    await loadBooks();
+    _books.add(book);
+    notifyListeners();
   }
 
   Future<void> updateBook(Book book) async {
     await _bookDao.updateBook(book);
-    await loadBooks();
+    final idx = _books.indexWhere((b) => b.id == book.id);
+    if (idx != -1) _books[idx] = book;
+    notifyListeners();
   }
 
   Future<void> removeBook(String id) async {
     await _bookDao.deleteBook(id);
-    await loadBooks();
+    _books.removeWhere((b) => b.id == id);
+    notifyListeners();
   }
 
   Future<void> addNote(Note note) async {
     await _noteDao.insertNote(note);
-    await loadNotes();
+    _notes.add(note);
+    notifyListeners();
   }
 
   Future<void> updateNote(Note note) async {
     await _noteDao.updateNote(note);
-    await loadNotes();
+    final idx = _notes.indexWhere((n) => n.id == note.id);
+    if (idx != -1) _notes[idx] = note;
+    notifyListeners();
   }
 
   Future<void> removeNote(String id) async {
     await _noteDao.deleteNote(id);
-    await loadNotes();
+    _notes.removeWhere((n) => n.id == id);
+    notifyListeners();
   }
 
   Future<void> addGame(Game game) async {
     await _gameDao.insertGame(game);
-    await loadGames();
+    _games.add(game);
+    notifyListeners();
   }
 
   Future<void> updateGame(Game game) async {
     await _gameDao.updateGame(game);
-    await loadGames();
+    final idx = _games.indexWhere((g) => g.id == game.id);
+    if (idx != -1) _games[idx] = game;
+    notifyListeners();
   }
 
   Future<void> removeGame(String id) async {
     await _gameDao.deleteGame(id);
-    await loadGames();
+    _games.removeWhere((g) => g.id == id);
+    notifyListeners();
   }
 
   /// 仅更新游戏封面偏移量（不触发全量刷新）
@@ -477,7 +532,10 @@ class AppProvider extends ChangeNotifier {
 
   Future<void> toggleNotePin(String id, bool isPinned) async {
     await _noteDao.togglePin(id, isPinned);
-    await loadNotes();
+    final idx = _notes.indexWhere((n) => n.id == id);
+    if (idx != -1) {
+      _notes[idx] = _notes[idx].copyWith(isPinned: isPinned);
+    }
     notifyListeners();
   }
   
@@ -722,29 +780,59 @@ class AppProvider extends ChangeNotifier {
     final deletedBookExcerpts = await getDeletedBookExcerpts();
     final deletedGameReviews = await getDeletedGameReviews();
 
-    for (final movie in deletedMovies) {
+    // 先收集需要删除图片的 ID，再在事务中批量删除数据库记录
-      await permanentDeleteMovie(movie.id);
+    final movieIds = deletedMovies.map((m) => m.id).toList();
+    final bookIds = deletedBooks.map((b) => b.id).toList();
+    final noteIds = deletedNotes.map((n) => n.id).toList();
+    final gameIds = deletedGames.map((g) => g.id).toList();
+
+    // 事务内批量删除数据库记录，保证原子性
+    final db = await DatabaseHelper.instance.database;
+    await db.transaction((txn) async {
+      for (final id in movieIds) {
+        await txn.delete('movie_reviews', where: 'movie_id = ?', whereArgs: [id]);
+        await txn.delete('movie_posters', where: 'movie_id = ?', whereArgs: [id]);
+        await txn.delete('movies', where: 'id = ?', whereArgs: [id]);
+      }
+      for (final id in bookIds) {
+        await txn.delete('book_reviews', where: 'book_id = ?', whereArgs: [id]);
+        await txn.delete('book_excerpts', where: 'book_id = ?', whereArgs: [id]);
+        await txn.delete('books', where: 'id = ?', whereArgs: [id]);
+      }
+      for (final id in noteIds) {
+        await txn.delete('notes', where: 'id = ?', whereArgs: [id]);
+      }
+      for (final id in gameIds) {
+        await txn.delete('game_reviews', where: 'game_id = ?', whereArgs: [id]);
+        await txn.delete('game_screenshots', where: 'game_id = ?', whereArgs: [id]);
+        await txn.delete('games', where: 'id = ?', whereArgs: [id]);
+      }
+      for (final review in deletedMovieReviews) {
+        await txn.delete('movie_reviews', where: 'id = ?', whereArgs: [review.id]);
+      }
+      for (final review in deletedBookReviews) {
+        await txn.delete('book_reviews', where: 'id = ?', whereArgs: [review.id]);
+      }
+      for (final excerpt in deletedBookExcerpts) {
+        await txn.delete('book_excerpts', where: 'id = ?', whereArgs: [excerpt.id]);
+      }
+      for (final review in deletedGameReviews) {
+        await txn.delete('game_reviews', where: 'id = ?', whereArgs: [review.id]);
+      }
+    });
+
+    // 事务成功后，清理关联的图片文件（文件删除失败不影响数据一致性）
+    for (final id in movieIds) {
+      await ImagePathHelper.instance.deleteMovieImages(id);
     }
-    for (final book in deletedBooks) {
+    for (final id in bookIds) {
-      await permanentDeleteBook(book.id);
+      await ImagePathHelper.instance.deleteBookImages(id);
     }
-    for (final note in deletedNotes) {
+    for (final id in noteIds) {
-      await permanentDeleteNote(note.id);
+      await ImagePathHelper.instance.deleteNoteImages(id);
     }
-    for (final game in deletedGames) {
+    for (final id in gameIds) {
-      await permanentDeleteGame(game.id);
+      await ImagePathHelper.instance.deleteGameImages(id);
-    }
-    for (final review in deletedMovieReviews) {
-      await _reviewDao.permanentDeleteReview(review.id);
-    }
-    for (final review in deletedBookReviews) {
-      await _bookReviewDao.permanentDeleteReview(review.id);
-    }
-    for (final excerpt in deletedBookExcerpts) {
-      await _bookExcerptDao.permanentDeleteExcerpt(excerpt.id);
-    }
-    for (final review in deletedGameReviews) {
-      await _gameReviewDao.permanentDeleteReview(review.id);
     }
 
     await loadMovies();

lib/services/usage_stats_service.dart

@@ -6,6 +6,7 @@ import 'package:device_info_plus/device_info_plus.dart';
 import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
 import 'package:package_info_plus/package_info_plus.dart';
+import 'package:uuid/uuid.dart';
 import '../utils/user_prefs.dart';
 import '../utils/server_config.dart';
 
@@ -87,7 +88,7 @@ class UsageStatsService with WidgetsBindingObserver {
       final info = await deviceInfo.linuxInfo;
       rawId = '${info.name}-${info.id}';
     } else {
-      rawId = DateTime.now().millisecondsSinceEpoch.toString();
+      rawId = const Uuid().v4();
     }
 
     final bytes = utf8.encode(rawId);