fix: 出货单审核后也可以修改了(未绑定送货单都可以)

shipment/services.py

@@ -708,13 +708,13 @@ def update_shipment(
     更新出货单业务数据。
 
     说明：
-    - 仅允许在草稿状态下修改
+    - 仅允许修改未关联送货单的出货单
     - 不处理状态变更
     """
     from basic_info.models import Customer
 
-    if shipment.status != ShipmentStatus.DRAFT:
-        raise ValueError("仅草稿状态的出货单允许修改")
+    if shipment.delivery_id is not None:
+        raise ValueError("已关联送货单的出货单不允许修改")
 
     if customer_id is not None:
         customer = Customer.objects.filter(id=customer_id).first()