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/impl/delete_transfer_history.py

@@ -0,0 +1,57 @@
+"""删除整理历史记录工具"""
+
+from typing import Optional, Type
+
+from pydantic import BaseModel, Field
+
+from app.agent.tools.base import MoviePilotTool
+from app.db.transferhistory_oper import TransferHistoryOper
+from app.log import logger
+
+
+class DeleteTransferHistoryInput(BaseModel):
+    """删除整理历史记录工具的输入参数模型"""
+
+    explanation: str = Field(
+        ...,
+        description="Clear explanation of why this tool is being used in the current context",
+    )
+    history_id: int = Field(
+        ..., description="The ID of the transfer history record to delete"
+    )
+
+
+class DeleteTransferHistoryTool(MoviePilotTool):
+    name: str = "delete_transfer_history"
+    description: str = "Delete a specific transfer history record by its ID. This is useful when you need to remove a failed transfer record before retrying the transfer, as the system skips files that already have transfer history."
+    args_schema: Type[BaseModel] = DeleteTransferHistoryInput
+    require_admin: bool = True
+
+    def get_tool_message(self, **kwargs) -> Optional[str]:
+        """根据参数生成友好的提示消息"""
+        history_id = kwargs.get("history_id")
+        return f"正在删除整理历史记录: ID={history_id}"
+
+    async def run(self, history_id: int, **kwargs) -> str:
+        logger.info(f"执行工具: {self.name}, 参数: history_id={history_id}")
+
+        try:
+            transferhis = TransferHistoryOper()
+
+            # 查询历史记录是否存在
+            history = transferhis.get(history_id)
+            if not history:
+                return f"错误：整理历史记录不存在，ID={history_id}"
+
+            # 保存信息用于返回
+            title = history.title or "未知"
+            src = history.src or "未知"
+            status = "成功" if history.status else "失败"
+
+            # 删除记录
+            transferhis.delete(history_id)
+
+            return f"已删除整理历史记录：ID={history_id}，标题={title}，源路径={src}，状态={status}"
+        except Exception as e:
+            logger.error(f"删除整理历史记录失败: {e}", exc_info=True)
+            return f"删除整理历史记录时发生错误: {str(e)}"