fix: 后台添加角色按客服账号定位；下单OpenID字段名修正

backend/view.py

@@ -527,11 +527,15 @@ class ModifyAdminUserView(APIView):
         if not target_phone:
             return Response({'code': 400, 'msg': '缺少目标用户账号'})
 
+        # Phone 非唯一，同一手机号可能对应多个微信用户；后台操作只定位客服账号
+        target_user = User.query.filter(
+            Phone=target_phone,
+            KefuProfile__isnull=False,
+        ).first()
+        if not target_user:
+            return Response({'code': 404, 'msg': '用户不存在或非后台账号'})
         try:
-            target_user = User.query.get(Phone=target_phone)
             target_kefu = target_user.KefuProfile
-        except User.DoesNotExist:
-            return Response({'code': 404, 'msg': '用户不存在'})
         except UserKefu.DoesNotExist:
             return Response({'code': 404, 'msg': '用户扩展信息缺失'})