refactor(app.vue): 恢复：水印功能

src/App.vue

 <template>
-  <!-- <template v-if="!isInWhiteList">
+  <template v-if="!isInWhiteList">
     <el-watermark :font="font"
       :content="content"
       class="wm-class">
       <router-view />
     </el-watermark>
   </template>
-  <template v-else> -->
+  <template v-else>
     <router-view />
-  <!-- </template> -->
+  </template>
 </template>
 
 <script setup>