fix: 代客下单优化购物车以及优惠价格展示，修复后付费去结账未生成订单问题

src/views/tool/Instead/index.vue

@@ -354,7 +354,7 @@ async function createOrder(key) {
     loading.close();
   }, 1000 * 20);
   try {
-    if (key == "to-pay" && carts.list.length <= 0) {
+    if (key == "to-pay" && carts.list.length <= 0 && oldOrder.value.id) {
       showOrder.value = true;
       return;
     }