fix(monitor): 目录监控自愈、快照语义修正与覆盖保护闭环 (#6210)

app/modules/filemanager/transhandler.py

@@ -23,6 +23,7 @@ from app.schemas import (
     TransferRenameBuildEventData,
     TransferRenameEventData,
 )
+from app.schemas.exception import StorageQueryError
 from app.schemas.types import MediaType, ChainEventType
 from app.utils.system import SystemUtils
 
@@ -405,8 +406,23 @@ class TransHandler:
                 # 判断是否要覆盖，附加文件强制覆盖
                 overflag = False
                 if not __is_extra_file(fileitem):
-                    # 目标文件
-                    target_item = target_oper.get_item(new_file)
+                    # 目标文件（严格查询：无法确认状态时拒绝覆盖，避免已有文件被误覆盖）
+                    try:
+                        target_item = target_oper.get_item_strict(new_file)
+                    except StorageQueryError as query_err:
+                        errmsg = f"无法确认目标文件状态，已跳过整理以避免误覆盖：{new_file} - {query_err}"
+                        logger.warn(errmsg)
+                        self.__update_result(
+                            result=result,
+                            success=False,
+                            message=errmsg,
+                            fileitem=fileitem,
+                            target_diritem=target_diritem,
+                            fail_list=[fileitem.path],
+                            transfer_type=transfer_type,
+                            need_notify=need_notify,
+                        )
+                        return result
                     if target_item:
                         # 目标文件已存在
                         target_file = new_file