fix: 侧栏仅展示服务端visible_page_ids，无权限不显示商家订单

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

src/views/order/MerchantOrder.vue

@@ -260,6 +260,7 @@ const fetchOrders = async () => {
       }
     } else if (res.code === 403) {
       hasPermission.value = false
+      ElMessage.warning(res.msg || '当前俱乐部无商家订单权限')
     } else {
       ElMessage.error(res.msg || '获取订单列表失败')
     }