新增游戏功能记录模块

lib/data/game/game_screenshot_dao.dart

@@ -0,0 +1,68 @@
+import 'package:flutter/foundation.dart';
+import '../database_helper.dart';
+import '../../models/data_models.dart';
+
+/// 游戏截图数据访问对象
+class GameScreenshotDao {
+  final DatabaseHelper _dbHelper = DatabaseHelper.instance;
+
+  Future<T> _wrap<T>(String op, Future<T> Function() fn) async {
+    try {
+      return await fn();
+    } catch (e) {
+      debugPrint('[GameScreenshotDao] $op error: $e');
+      rethrow;
+    }
+  }
+
+  /// 获取游戏的所有截图
+  Future<List<GameScreenshot>> getScreenshotsByGameId(String gameId) => _wrap('getScreenshotsByGameId', () async {
+    final db = await _dbHelper.database;
+    final List<Map<String, dynamic>> maps = await db.query(
+      'game_screenshots',
+      where: 'game_id = ? AND is_deleted = 0',
+      whereArgs: [gameId],
+      orderBy: 'created_at DESC',
+    );
+    return List.generate(maps.length, (i) => GameScreenshot.fromJson(maps[i]));
+  });
+
+  /// 根据ID获取截图
+  Future<GameScreenshot?> getScreenshotById(String id) => _wrap('getScreenshotById', () async {
+    final db = await _dbHelper.database;
+    final List<Map<String, dynamic>> maps = await db.query(
+      'game_screenshots',
+      where: 'id = ? AND is_deleted = 0',
+      whereArgs: [id],
+    );
+    if (maps.isEmpty) return null;
+    return GameScreenshot.fromJson(maps.first);
+  });
+
+  /// 添加截图
+  Future<int> insertScreenshot(GameScreenshot screenshot) => _wrap('insertScreenshot', () async {
+    final db = await _dbHelper.database;
+    return await db.insert('game_screenshots', screenshot.toJson());
+  });
+
+  /// 软删除截图
+  Future<int> deleteScreenshot(String id) => _wrap('deleteScreenshot', () async {
+    final db = await _dbHelper.database;
+    return await db.update(
+      'game_screenshots',
+      {'is_deleted': 1},
+      where: 'id = ?',
+      whereArgs: [id],
+    );
+  });
+
+  /// 获取游戏截图数量
+  Future<int> getScreenshotCount(String gameId) => _wrap('getScreenshotCount', () async {
+    final db = await _dbHelper.database;
+    final result = await db.rawQuery(
+      'SELECT COUNT(*) as count FROM game_screenshots WHERE game_id = ? AND is_deleted = 0',
+      [gameId],
+    );
+    return result.first['count'] as int? ?? 0;
+  });
+}