草稿箱加数量

src/views/screening/DraftBox.vue

 <template>
   <div class="container" style="max-height: 89vh">
     <div v-show="!isDetail">
-      <div class="header">草稿箱</div>
+      <div class="header">草稿箱 【{{ total }}条】</div>
       <div class="content">
         <el-table-self
           ref="table"