feat: 点单横幅/个人中心背景 page_key，并 seed 转盘菜单

新增 accept_order_banner2、boss_center；菜单定义写入 product.turntable，不影响现有俱乐部数据隔离。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/views/system.py

@@ -619,6 +619,7 @@ class ModifyProductTypeZoneView(APIView):
                     shenhezhuangtai=shenhezhuangtai,
                     paixu=0,
                     club_id=club_id,
+                    tupian_url=(request.data.get('tupian_url') or '').strip(),
                 )
             return Response({'code': 0, 'msg': '添加成功', 'data': {'id': zhuanqu.id, 'club_id': club_id}})
         except Exception as e:
@@ -670,6 +671,12 @@ class ModifyProductTypeZoneView(APIView):
             except (TypeError, ValueError):
                 return Response({'code': 400, 'msg': '审核状态无效（必须为1或2）'})
 
+        if 'tupian_url' in request.data:
+            new_url = (request.data.get('tupian_url') or '').strip()
+            old_url = getattr(zhuanqu, 'tupian_url', None) or ''
+            if new_url != old_url:
+                changes['tupian_url'] = new_url
+
         if not changes:
             return Response({'code': 400, 'msg': '未做任何修改'})