fix: 更新欢迎页图片链接和家庭排行显示逻辑

修改欢迎页的图片链接地址
调整家庭排行页面中大家长信息的显示逻辑，根据tab不同显示不同内容
补充家庭排行信息中的缺失字段

 <!--
  * @Date: 2025-09-01 13:07:52
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-18 17:38:03
+ * @LastEditTime: 2025-09-18 17:59:13
  * @FilePath: /lls_program/src/pages/FamilyRank/index.vue
  * @Description: 文件描述
 -->
@@ -137,7 +137,7 @@
           </view>
           <view class="my-family-info">
             <view class="my-family-name">{{ myRankInfo.family_name }}</view>
-            <view class="my-leader-name">大家长：{{ myRankInfo.created_by_nickname }}</view>
+            <view class="my-leader-name">{{ activeTab === 'support' ? `${myRankInfo.created_by_nickname}个家庭` : `大家长：${myRankInfo.created_by_nickname}` }}</view>
           </view>
         </view>
         <view class="my-rank-right">
@@ -392,7 +392,9 @@ const myRankInfo = computed(() => {
     return {
       ...currentInstitution,
       name: currentInstitution.name,
+      family_name: currentInstitution.name,
       avatar_url: currentInstitution.avatar_url,
+      created_by_nickname: currentInstitution.created_by_nickname,
       step: currentInstitution.step,
       rank: currentInstitution.rank
     }

 <!--
  * @Date: 2025-08-27 17:43:45
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-16 22:15:45
+ * @LastEditTime: 2025-09-18 17:55:04
  * @FilePath: /lls_program/src/pages/Welcome/index.vue
  * @Description: 欢迎页
 -->
@@ -153,7 +153,7 @@ import { getUserProfileAPI } from '@/api/user';
 // 导入主题颜色
 import { THEME_COLORS } from '@/utils/config';
 
-const welcomeHomeImg = 'https://cdn.ipadbiz.cn/lls_prog/images/welcome_home.png';
+const welcomeHomeImg = 'https://cdn.ipadbiz.cn/lls_prog/images/welcome_home_1.png';
 
 const userAge = ref(null);
 const userInfo = ref({});