style(Rewards): 更新选中积分选项的样式并移除冗余文本

将选中积分选项的背景色改为蓝色并移除"可兑"文本，使界面更简洁

 <!--
  * @Date: 2025-08-27 17:47:26
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-09-15 13:03:39
+ * @LastEditTime: 2025-09-17 13:55:54
  * @FilePath: /lls_program/src/pages/Rewards/index.vue
  * @Description: 文件描述
 -->
@@ -34,12 +34,11 @@
             :class="[
               'flex-1 py-3 rounded-lg border text-center',
               selectedPoints === option.range
-                ? 'border-blue-500 bg-blue-50 text-blue-500'
+                ? 'border-blue-500 bg-blue-500 text-white'
                 : 'border-gray-200 text-gray-700 bg-gray-50'
             ]">
             <view class="text-center text-xs">
               <view>{{ option.label }}</view>
-              <view>可兑</view>
             </view>
           </view>
         </view>