fix(warehouse): fix AttributeError by safely extracting existing attribute from SysWarehouseLocation

inventory-backend/app/api/v1/warehouse.py

@@ -176,7 +176,7 @@ def delete_location(location_id):
             return jsonify({'code': 404, 'msg': '库位不存在', 'data': None})
 
         # 在删除前提取属性，避免 commit 后访问已删除对象
-        location_code = location.location_code
+        deleted_loc_name = location.name
 
         # 递归删除所有子库位
         def delete_recursive(loc):
@@ -193,7 +193,7 @@ def delete_location(location_id):
         return jsonify({
             'code': 200,
             'msg': '删除成功',
-            'location_code': location_code
+            'deleted_location': deleted_loc_name
         })
     except Exception as e:
         db.session.rollback()