refactor: 更新默认头像链接为统一资源

将ProfilePage和HomePage中的默认头像链接统一更新为'https://cdn.ipadbiz.cn/mlaj/images/icon_1.jpeg'，以提高资源管理的一致性

 <!--
  * @Date: 2025-03-20 19:55:21
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-03-25 18:05:48
- * @FilePath: /mlaj/src/views/HomePage.vue
+ * @LastEditTime: 2025-03-26 13:44:53
+ * @FilePath: /mlaj/src/views/homepage.vue
  * @Description: 亲子学院首页组件
  *
  * 主要功能模块：
@@ -38,7 +38,7 @@
             <div class="flex items-center">
               <div class="w-10 h-10 rounded-full overflow-hidden mr-3">
                 <img
-                  :src="currentUser?.avatar || 'https://cdn.ipadbiz.cn/mlaj/images/user-avatar-2.jpg'"
+                  :src="currentUser?.avatar || 'https://cdn.ipadbiz.cn/mlaj/images/icon_1.jpeg'"
                   class="w-full h-full object-cover"
                   @error="handleImageError" />
               </div>

@@ -13,7 +13,7 @@
             class="w-24 h-24 rounded-full overflow-hidden border-4 border-white shadow-lg mb-4"
           >
             <img
-              :src="profile.avatar || 'https://fastly.jsdelivr.net/npm/@vant/assets/cat.jpeg'"
+              :src="profile.avatar || 'https://cdn.ipadbiz.cn/mlaj/images/icon_1.jpeg'"
               :alt="profile.name"
               class="w-full h-full object-cover"
               @error="handleImageError"