优化下拉框搜索功能

src/views/supplier/user/add.vue

@@ -18,7 +18,7 @@
         <el-input v-model="formData1.shopName" placeholder="请输入供应商名称" maxlength="50" show-word-limit />
       </el-form-item>
 
-      <el-form-item v-if="formData1.shopType === 1" label="供应商名称:" prop="brandId">
+      <el-form-item v-if="formData1.shopType === 1" clearable label="供应商名称:" prop="brandId">
         <el-select
           v-model="formData1.brandId"
           placeholder="请选择品牌"

src/views/supplier/user/index.vue

@@ -10,7 +10,7 @@
         <el-option label="品牌方" :value="1" />
       </el-select>
       <span>所属品牌:</span>
-      <el-select v-model="listQuery.brandId" placeholder="所属品牌" clearable class="filter-item" style="width: 200px" @change="getList()">
+      <el-select v-model="listQuery.brandId" placeholder="所属品牌" clearable class="filter-item" style="width: 200px" filterable @change="getList()">
         <el-option label="所有品牌" value="" />
         <el-option
           v-for="item in brandList"