feat(RankingCard): 在排行榜卡片中添加助力码入口

添加点击助力码跳转至加入组织页面的功能，提升用户体验

 <!--
  * @Date: 2025-01-09 00:00:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-18 16:45:21
+ * @LastEditTime: 2025-09-18 17:09:27
  * @FilePath: /lls_program/src/components/RankingCard.vue
  * @Description: 排行榜卡片组件
 -->
@@ -41,8 +41,9 @@
     <!-- 排行榜内容 -->
     <view class="rank-content" :class="{ 'content-switching': isContentSwitching }">
       <!-- 排行榜日期 -->
-      <view class="rank-date">
+      <view class="rank-date relative">
         {{ currentDate }}
+        <view v-if="activeTab === 'support'" class="absolute font-bold text-white" style="right: 95rpx;" @tap="joinOrganization">助力码</view>
       </view>
       <!-- 前三名展示 -->
       <view class="top-three">
@@ -122,6 +123,7 @@
 
 <script setup>
 import { ref, computed, onMounted } from 'vue'
+import Taro from '@tarojs/taro'
 import { IconFont } from '@nutui/icons-vue-taro';
 // 默认头像
 const defaultAvatar = 'https://cdn.ipadbiz.cn/mlaj/images/icon_1.jpeg'
@@ -212,6 +214,12 @@ const supportData = ref({
   }
 })
 
+const joinOrganization = () => {
+  Taro.navigateTo({
+    url: '/pages/JoinOrganization/index'
+  })
+}
+
 // 加载状态
 const loading = ref(false)