Refactor movie pilot config and test coverage

app/agent/tools/impl/delete_download_history.py

@@ -6,8 +6,7 @@ from pydantic import BaseModel, Field
 
 from app.agent.tools.base import MoviePilotTool
 from app.agent.tools.tags import ToolTag
-from app.db import AsyncSessionFactory
-from app.db.models.downloadhistory import DownloadHistory
+from app.db.downloadhistory_oper import DownloadHistoryOper
 from app.log import logger
 
 
@@ -40,9 +39,8 @@ class DeleteDownloadHistoryTool(MoviePilotTool):
         logger.info(f"执行工具: {self.name}, 参数: history_id={history_id}")
 
         try:
-            async with AsyncSessionFactory() as db:
-                await DownloadHistory.async_delete(db, history_id)
-                return f"下载历史记录 ID: {history_id} 已成功删除"
+            await DownloadHistoryOper().async_delete_history(history_id)
+            return f"下载历史记录 ID: {history_id} 已成功删除"
         except Exception as e:
             logger.error(f"删除下载历史记录失败: {e}", exc_info=True)
             return f"删除下载历史记录时发生错误: {str(e)}"