fix(myCar): 修复车源状态切换时的提示消息不一致问题

修改状态切换逻辑，使用局部变量存储状态值，确保提示消息与操作一致。同时调整成功提示的显示方式和持续时间。

 <!--
  * @Date: 2022-09-19 14:11:06
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-10 16:26:10
+ * @LastEditTime: 2025-07-10 17:40:19
  * @FilePath: /jgdl/src/pages/myCar/index.vue
  * @Description: 文件描述
 -->
@@ -203,18 +203,21 @@ const toggleOffline = (car) => {
 const confirmOffline = async () => {
   if (currentOfflineCar.value) {
     const car = currentOfflineCar.value
+    let status = car.status
     if (car.status === 3) {
       car.status = 5
+      status = 5
     } else {
-      car.status = 3
+      status = 3
     }
 
     // 调用API更新车源状态
-    const { code } = await changeVehicleStatusAPI({ id: car.id, status: car.status })
+    const { code, msg } = await changeVehicleStatusAPI({ id: car.id, status: status })
     if (code) {
       Taro.showToast({
-        title: car.status === 3 ? '已下架' : '已上架',
-        icon: 'success'
+        title: status === 5 ? '下架成功' : msg,
+        icon: 'none',
+        duration: 2000
       })
     }
   }