feat: 整理失败时AI智能体自动重试

- 新增 delete_transfer_history 工具供智能体删除失败历史记录
- 新增 transfer-failed-retry 技能引导智能体执行重试流程
- 新增 AI_AGENT_RETRY_TRANSFER 配置项控制是否启用
- AgentManager 新增 retry_failed_transfer() 方法创建独立会话执行重试
- 整理失败和媒体未识别时自动触发智能体重试

app/agent/tools/factory.py

@@ -37,6 +37,7 @@ from app.agent.tools.impl.run_workflow import RunWorkflowTool
 from app.agent.tools.impl.update_site_cookie import UpdateSiteCookieTool
 from app.agent.tools.impl.delete_download import DeleteDownloadTool
 from app.agent.tools.impl.delete_download_history import DeleteDownloadHistoryTool
+from app.agent.tools.impl.delete_transfer_history import DeleteTransferHistoryTool
 from app.agent.tools.impl.modify_download import ModifyDownloadTool
 from app.agent.tools.impl.query_directory_settings import QueryDirectorySettingsTool
 from app.agent.tools.impl.list_directory import ListDirectoryTool
@@ -97,6 +98,7 @@ class MoviePilotToolFactory:
             QueryDownloadTasksTool,
             DeleteDownloadTool,
             DeleteDownloadHistoryTool,
+            DeleteTransferHistoryTool,
             ModifyDownloadTool,
             QueryDownloadersTool,
             QuerySitesTool,