fix(SearchPopup): 修复导航栏标题在弹窗关闭时未重置的问题

将onMounted改为watch监听visible变化，在弹窗关闭时重置导航栏标题

 <!--
  * @Date: 2025-01-20 00:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-04 16:05:59
+ * @LastEditTime: 2025-07-04 16:10:26
  * @FilePath: /jgdl/src/components/SearchPopup.vue
  * @Description: 搜索弹窗组件
 -->
@@ -128,7 +128,7 @@
 </template>
 
 <script setup>
-import { ref, computed, onMounted } from 'vue'
+import { ref, computed, watch } from 'vue'
 import Taro from '@tarojs/taro'
 import { Search2, Check, Heart1, HeartFill } from '@nutui/icons-vue-taro'
 import "./SearchPopup.less"
@@ -408,11 +408,19 @@ const resetSearchState = () => {
     selectedSchool.value = '所在学校'
 }
 
-onMounted(() => {
-    // 动态修改标题
-    wx.setNavigationBarTitle({
-        title: '搜索车源'
-    });
+// 监听visible.value的变化
+watch(visible, (newVisible) => {
+    if (newVisible) {
+        // 动态修改标题
+        wx.setNavigationBarTitle({
+            title: '搜索车源'
+        });
+    } else {
+        // 关闭弹窗时重置标题
+        wx.setNavigationBarTitle({
+            title: ''
+        });
+    }
 })
 </script>