style(teacher): 调整学生页面班级列表的间距格式

@@ -2,7 +2,7 @@
  * @Author: hookehuyr hookehuyr@gmail.com
  * @Date: 2025-06-19 17:12:19
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-06-27 14:45:33
+ * @LastEditTime: 2025-06-30 17:45:27
  * @FilePath: /mlaj/src/views/teacher/studentPage.vue
  * @Description: 学生详情页面
 -->
@@ -22,7 +22,9 @@
             </div>
             <div class="flex items-center mb-2">
               <van-icon name="chat-o" size="16" color="#10b981" class="mr-1" />
-              <span class="text-sm text-gray-600 mr-4" v-for="(item, index) in studentInfo.class_list" :key="index">{{ item.class_name }}</span>
+              <span class="text-sm text-gray-600 mr-4">
+                <span class="mr-1" v-for="(item, index) in studentInfo.class_list" :key="index">{{ item.class_name }}</span>
+              </span>
               <van-icon name="phone-o" size="16" color="#10b981" class="mr-1" />
               <span class="text-sm text-gray-600">{{ formatPhone(studentInfo.mobile) }}</span>
             </div>