feat(RankingCard): 在排行榜卡片标题中添加奖杯图标并更新标题文本

添加 IconFont 组件以显示奖杯图标，同时将标题从“全市排行”更新为更具体的“家庭步数总榜”

 <!--
  * @Date: 2025-01-09 00:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-15 16:00:12
+ * @LastEditTime: 2025-09-16 11:22:44
  * @FilePath: /lls_program/src/components/RankingCard.vue
  * @Description: 排行榜卡片组件
 -->
@@ -9,7 +9,10 @@
   <view class="ranking-card bg-blue-500 bg-opacity-50">
     <!-- 卡片头部 -->
     <view class="card-header">
-      <view class="card-title">全市排行</view>
+      <view class="card-title flex items-center">
+        <IconFont size="20" name="https://cdn.ipadbiz.cn/lls_prog/icon/%E5%A5%96%E6%9D%AF.png" />
+        <text class="ml-2">家庭步数总榜</text>
+      </view>
       <view class="view-more" @tap="handleViewMore">查看更多</view>
     </view>
 
@@ -119,6 +122,7 @@
 
 <script setup>
 import { ref, computed, onMounted } from 'vue'
+import { IconFont } from '@nutui/icons-vue-taro';
 // 默认头像
 const defaultAvatar = 'https://cdn.ipadbiz.cn/mlaj/images/icon_1.jpeg'
 // 导入接口