fix: 清理抽卡插件遗留迁移死代码

- 删除 claim_achievement_reward 中不可达的 _migrate_data() 调用
- 删除 _migrate_data() 方法（JSON→SQLite 迁移已完成，不再需要）
- 删除 config 中 DAILY_DRAWS_FILE / USER_STATS_FILE 遗留配置

danding_bot/plugins/onmyoji_gacha/config.py

@@ -17,8 +17,6 @@ class Config(BaseSettings):
 
     # 数据文件路径
     DB_FILE: str = "data/onmyoji_gacha/gacha.db"
-    DAILY_DRAWS_FILE: str = "data/onmyoji_gacha/daily_draws.json"  # 保留用于迁移
-    USER_STATS_FILE: str = "data/onmyoji_gacha/user_stats.json"    # 保留用于迁移
 
     # 式神图片目录
     SHIKIGAMI_IMG_DIR: str = "data/chouka/"

danding_bot/plugins/onmyoji_gacha/data_manager.py

@@ -278,70 +278,6 @@ class DataManager:
             conn.commit()
             return cursor.rowcount > 0
 
-        # 迁移现有JSON数据到SQLite
-        self._migrate_data()
-    
-    def _migrate_data(self):
-        """迁移JSON数据到SQLite"""
-        try:
-            # 迁移每日抽卡记录
-            if os.path.exists(config.DAILY_DRAWS_FILE):
-                with open(config.DAILY_DRAWS_FILE, 'r', encoding='utf-8') as f:
-                    daily_draws = json.load(f)
-                    
-                    with sqlite3.connect(config.DB_FILE) as conn:
-                        cursor = conn.cursor()
-                        
-                        for date, users in daily_draws.items():
-                            for user_id, draws in users.items():
-                                for draw in draws:
-                                    # 查找式神ID
-                                    cursor.execute(
-                                        "SELECT id FROM shikigami WHERE name=? AND rarity=?",
-                                        (draw["name"], draw["rarity"])
-                                    )
-                                    shikigami_id = cursor.fetchone()
-                                    
-                                    if shikigami_id:
-                                        cursor.execute(
-                                            "INSERT INTO daily_draws (date, user_id, rarity, shikigami_id, timestamp) VALUES (?, ?, ?, ?, ?)",
-                                            (date, user_id, draw["rarity"], shikigami_id[0], draw["timestamp"])
-                                        )
-                        
-                        conn.commit()
-            
-            # 迁移用户统计数据
-            if os.path.exists(config.USER_STATS_FILE):
-                with open(config.USER_STATS_FILE, 'r', encoding='utf-8') as f:
-                    user_stats = json.load(f)
-                    
-                    with sqlite3.connect(config.DB_FILE) as conn:
-                        cursor = conn.cursor()
-                        
-                        for user_id, stats in user_stats.items():
-                            cursor.execute(
-                                "INSERT OR REPLACE INTO user_stats (user_id, total_draws, R_count, SR_count, SSR_count, SP_count) VALUES (?, ?, ?, ?, ?, ?)",
-                                (user_id, stats["total_draws"], stats["R_count"], stats["SR_count"], stats["SSR_count"], stats["SP_count"])
-                            )
-                            
-                            # 迁移抽卡历史
-                            for draw in stats.get("draw_history", []):
-                                cursor.execute(
-                                    "SELECT id FROM shikigami WHERE name=? AND rarity=?",
-                                    (draw["name"], draw["rarity"])
-                                )
-                                shikigami_id = cursor.fetchone()
-                                
-                                if shikigami_id:
-                                    cursor.execute(
-                                        "INSERT INTO draw_history (user_id, date, rarity, shikigami_id) VALUES (?, ?, ?, ?)",
-                                        (user_id, draw["date"], draw["rarity"], shikigami_id[0])
-                                    )
-                        
-                        conn.commit()
-                        
-        except Exception as e:
-            logging.error(f"数据迁移失败: {e}")
 
     def _load_shikigami_data(self) -> Dict[str, List[Dict[str, str]]]:
         """加载式神数据到数据库"""