refactor: 优化 slider-100 示例

pages/template/slider-100/slider-100.uvue

 <template>
+  <!-- #ifdef APP -->
   <scroll-view class="page">
+  <!-- #endif -->
     <page-head :title="title"></page-head>
     <view class="grid-view">
       <slider ref="slider" class="slider" v-for="(_, index) in 100" :key="index" @changing="sliderChanging"
         @change="sliderChange" :value="sliderValue" :block-size="20" :show-value="true" />
     </view>
+  <!-- #ifdef APP -->
   </scroll-view>
+  <!-- #endif -->
 </template>
 
 <script>