feat(PointsDetail): 添加返回顶部组件并优化标签栏样式

为提升用户体验，在积分详情页添加返回顶部组件，同时优化标签栏背景色为白色以提高可读性。注释掉未使用的nut-sticky组件。

@@ -56,7 +56,8 @@
           </view>
           </view>
         </view>
         </view>
         <!-- Tabs -->
         <!-- Tabs -->
-        <view class="border-b border-gray-200">
+        <!-- <nut-sticky top="0"> -->
+        <view class="border-b border-gray-200 bg-white">
           <view class="flex space-x-8">
           <view class="flex space-x-8">
             <view :class="['py-3 font-medium', activeTab === 'all' ? 'text-blue-500 border-b-2 border-blue-500' : 'text-gray-500']" @click="activeTab = 'all'">
             <view :class="['py-3 font-medium', activeTab === 'all' ? 'text-blue-500 border-b-2 border-blue-500' : 'text-gray-500']" @click="activeTab = 'all'">
               全部
               全部
@@ -69,6 +70,7 @@
             </view>
             </view>
           </view>
           </view>
         </view>
         </view>
+        <!-- </nut-sticky> -->
         <!-- Points history list -->
         <!-- Points history list -->
         <view class="pt-4">
         <view class="pt-4">
           <view v-if="loading">
           <view v-if="loading">
@@ -97,6 +99,8 @@
       </view>
       </view>
     </view>
     </view>
     <!-- <BottomNav /> -->
     <!-- <BottomNav /> -->
+        <!-- 返回顶部组件 -->
+    <BackToTop :distance="200" />
   </view>
   </view>
 </template>
 </template>
 
 
@@ -105,6 +109,7 @@ import { ref, computed, onMounted, watch } from 'vue';
 import Taro, { useDidShow } from '@tarojs/taro';
 import Taro, { useDidShow } from '@tarojs/taro';
 import AppHeader from '../../components/AppHeader.vue';
 import AppHeader from '../../components/AppHeader.vue';
 import BottomNav from '../../components/BottomNav.vue';
 import BottomNav from '../../components/BottomNav.vue';
+import BackToTop from '../../components/BackToTop.vue';
 import { Right, My } from '@nutui/icons-vue-taro';
 import { Right, My } from '@nutui/icons-vue-taro';
 import { getPointListAPI } from '../../api/points';
 import { getPointListAPI } from '../../api/points';