fix: added merchant_id to printing_order and plate_order

api_v1/views/printing/services.py

@@ -46,6 +46,10 @@ class PrintingOrderService:
         # 绑定创建人
         data['created_by'] = user
         
+        # 绑定商户（从当前用户的 employee 获取）
+        if hasattr(user, 'employee') and user.employee and user.employee.merchant:
+            data['merchant'] = user.employee.merchant
+        
         order = printing_models.PrintingOrder.objects.create(**data)
         return order
     
@@ -128,6 +132,10 @@ class PrintingJobService:
         # 绑定创建人
         data['created_by'] = user
         
+        # 绑定商户（从当前用户的 employee 获取）
+        if hasattr(user, 'employee') and user.employee and user.employee.merchant:
+            data['merchant'] = user.employee.merchant
+        
         # 创建 PrintingJob
         job = printing_models.PrintingJob.objects.create(**data)