refactor: enhance tool message handling and improve error logging

- Updated _send_tool_message to accept a title parameter for better message context.
- Modified various tool implementations to utilize the new title parameter for clearer messaging.
- Improved error logging across multiple tools to include exception details for better debugging.

app/agent/tools/impl/query_downloads.py

@@ -3,7 +3,7 @@
 import json
 from typing import Optional
 
-from app.db.download_oper import DownloadOper
+from app.chain.download import DownloadChain
 from app.log import logger
 from app.agent.tools.base import MoviePilotTool
 
@@ -16,8 +16,9 @@ class QueryDownloadsTool(MoviePilotTool):
                     status: Optional[str] = "all") -> str:
         logger.info(f"执行工具: {self.name}, 参数: downloader={downloader}, status={status}")
         try:
-            download_oper = DownloadOper()
-            downloads = download_oper.list()
+            download_chain = DownloadChain()
+            # 使用 DownloadChain.downloading 方法获取正在下载的任务
+            downloads = download_chain.downloading(name=downloader)
             filtered_downloads = []
             for dl in downloads:
                 if downloader and dl.downloader != downloader:
@@ -26,8 +27,8 @@ class QueryDownloadsTool(MoviePilotTool):
                     continue
                 filtered_downloads.append(dl)
             if filtered_downloads:
-                return json.dumps([d.dict() for d in filtered_downloads], ensure_ascii=False, indent=2)
+                return json.dumps([d.dict() if hasattr(d, 'dict') else d.model_dump() if hasattr(d, 'model_dump') else d for d in filtered_downloads], ensure_ascii=False, indent=2)
             return "未找到相关下载任务。"
         except Exception as e:
-            logger.error(f"查询下载失败: {e}")
+            logger.error(f"查询下载失败: {e}", exc_info=True)
             return f"查询下载时发生错误: {str(e)}"