diff --git a/backend/app/services/task_service.py b/backend/app/services/task_service.py
index c7cd2a2..eaf2535 100644
--- a/backend/app/services/task_service.py
+++ b/backend/app/services/task_service.py
@@ -217,6 +217,13 @@ async def _check_all_critical_children_completed(
     return len(incomplete) == 0, incomplete
 
 
+def _admin_proxy_note(operator_id: str | None, task_assignee_id: str | None) -> str:
+    """检测管理员代办 → 返回审计标记后缀"""
+    if operator_id and task_assignee_id and operator_id != task_assignee_id:
+        return f" [管理员 {operator_id} 代办]"
+    return ""
+
+
 async def _create_task_log(
     db: AsyncSession,
     task_id: uuid.UUID,
@@ -226,16 +233,12 @@ async def _create_task_log(
     task_assignee_id: str | None = None,
 ) -> TaskLog:
     """创建任务操作日志。自动检测管理员代办并拼接审计标记。"""
-    final_remark = remark or ""
-    # 管理员代办检测：操作人 ≠ 任务负责人 → 拼接审计追述
-    if operator_id and task_assignee_id and operator_id != task_assignee_id:
-        proxy_note = f" [管理员 {operator_id} 代办操作]"
-        final_remark = (final_remark + proxy_note).strip()
+    final_remark = (remark or "") + _admin_proxy_note(operator_id, task_assignee_id)
     log = TaskLog(
         task_id=task_id,
         operator_id=operator_id,
         action_type=action_type,
-        remark=final_remark or None,
+        remark=final_remark.strip() or None,
     )
     db.add(log)
     return log
@@ -558,7 +561,9 @@ async def receive_task(
         remark=remark or f"操作员确认接收任务「{task.task_name}」",
         task_assignee_id=task.assignee_id,
     )
-    db.add(TaskRecord(task_id=task.id, remark=remark or f"[接收] 操作员已确认接收", images="[]"))
+    db.add(TaskRecord(task_id=task.id,
+        remark=(remark or f"[接收] 操作员已确认接收") + _admin_proxy_note(operator_id, task.assignee_id),
+        images="[]"))
 
     # 接收时同步产品位置到接收人 + 宏观状态同步
     product_result = await db.execute(select(Product).where(Product.id == task.product_id))
@@ -760,7 +765,9 @@ async def transfer_task(
         remark=request.note or f"完成任务「{task.task_name}」，转交至下一道工序",
         task_assignee_id=task.assignee_id,
     )
-    db.add(TaskRecord(task_id=task.id, remark=request.note or f"[完工转交] 移交下一工序", images="[]"))
+    db.add(TaskRecord(task_id=task.id,
+        remark=(request.note or f"[完工转交] 移交下一工序") + _admin_proxy_note(operator_id, task.assignee_id),
+        images="[]"))
 
     # --- 动作 2：解析下家 & 裂变 ---
     # 兼容新旧格式