fix: 仓储任务节点修复(assignee=None + WAREHOUSE 类型) + 前端防御性渲染

- webhook 生成任务 assignee_id 置 None,不再填中文,避免前端解析报错跳过渲染
- task_type=WAREHOUSE,并同步 isMain 判断(后端+双端前端)使其画在中央主干道
- 前端对扫码入库/出库任务:不请求用户数据,直接显示 📦 + 'MOM 仓储系统'

backend/app/services/product_service.py

@@ -140,7 +140,7 @@ async def get_product_by_serial(db: AsyncSession, serial_number: str) -> Product
     all_mains: list = []
     def _collect_main(tasks):
         for t in tasks:
-            if not t.parent_task_id or t.task_type in ("TRANSFER", "RECOVERY"):
+            if not t.parent_task_id or t.task_type in ("TRANSFER", "RECOVERY", "WAREHOUSE"):
                 all_mains.append(t)
             if t.child_tasks:
                 _collect_main(t.child_tasks)
@@ -465,7 +465,7 @@ async def update_overall_status(
                 Task.status.in_(["WIP", "PENDING"]),
                 or_(
                     Task.parent_task_id.is_(None),
-                    Task.task_type.in_(["TRANSFER", "RECOVERY"]),
+                    Task.task_type.in_(["TRANSFER", "RECOVERY", "WAREHOUSE"]),
                 ),
             ).order_by(Task.created_at.desc()).limit(1)
         )
@@ -657,7 +657,7 @@ async def get_all_products(
             Task.product_id.in_(product_ids),
             or_(
                 Task.parent_task_id.is_(None),
-                Task.task_type.in_(["TRANSFER", "RECOVERY"]),
+                Task.task_type.in_(["TRANSFER", "RECOVERY", "WAREHOUSE"]),
             ),
         )
         prio_expr = sa_case(