头部banner只有在add时显示的问题优化

 <!--
  * @Date: 2022-07-18 10:22:22
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2024-07-27 10:53:28
+ * @LastEditTime: 2024-07-27 16:09:51
  * @FilePath: /data-table/src/views/index.vue
  * @Description: 首页
 -->
 <template>
   <van-notice-bar v-if="formSetting.sjsj_is_count_down" left-icon="volume-o" :text="notice_text" scrollable
     mode="closeable" />
-  <div class="table-box" :style="{ margin: is_pc ? '1rem 0' : '1rem', overflow: 'auto' }">
-    <template v-if="PHeader.visible">
+  <div class="table-box" :style="{ margin: is_pc ? '1rem 0' : '1rem', overflow: 'auto', minWidth: is_pc ? '40rem' : '' }">
+    <template v-if="PHeader.visible && page_type === 'add'">
       <van-image v-if="PHeader.type === 'image' && PHeader.cover" width="100%" :src="PHeader.cover + '?imageView2/0/w/2000'" fit="cover" />
       <template v-if="PHeader.type === 'carousel'">
         <van-swipe class="my-swipe" lazy-render indicator-color="white">