fix: 处理免费订单直接跳转成功页而非支付页

 <!--
  * @Date: 2024-01-15 16:25:51
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2026-01-22 11:21:08
+ * @LastEditTime: 2026-01-22 12:18:08
  * @FilePath: /git/xysBooking/src/views/submit.vue
  * @Description: 预约人员信息
 -->
@@ -128,7 +128,16 @@ const submitBtn = async () => {
     // TAG: 提交订单跳转到支付页面
     const { code, data } = await addReserveAPI({ reserve_date: date, begin_time: time.split('-')[0], end_time: time.split('-')[1], person_id_list: JSON.stringify(checked_visitors.value), period_type });
     if (code) {
-      const pay_url = `/srv/?f=reserve&a=icbc_pay&pay_id=${data.pay_id}`;
+      const pay_id = data?.pay_id
+      const need_pay = data?.need_pay
+
+      const is_free_order = Number(total.value) <= 0 || Number(need_pay) === 0 || need_pay === false
+      if (is_free_order) {
+        go('/success', { pay_id })
+        return
+      }
+
+      const pay_url = `/srv/?f=reserve&a=icbc_pay&pay_id=${pay_id}`;
       location.href = pay_url; // 跳转支付页面
     }
   }