fix 添加更多-搜索框，增加清空已填信息的功能

 <!--
  * @Date: 2024-07-23 16:24:08
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2024-07-26 17:03:12
+ * @LastEditTime: 2024-08-06 09:51:02
  * @FilePath: /temple_material_request/src/components/chooseMaterial/index.vue
  * @Description: 选择物资组件
 -->
@@ -20,7 +20,7 @@
               <van-row gutter="10" justify="center" align="center">
                 <van-col span="24">
                   <div style="background-color: #FBF9F1; display: flex; border-radius: 5rem; padding: 0 1rem; align-items: center; justify-content: center;">
-                    <van-icon name="search" /><van-field v-model="search_value" @blur="onBlur" label="" placeholder="搜索物资名称/规格" style="background-color: #FBF9F1;" />
+                    <van-icon name="search" /><van-field v-model="search_value" @blur="onBlur" label="" clearable placeholder="搜索物资名称/规格" style="background-color: #FBF9F1;" />
                   </div>
                 </van-col>
               </van-row>