退料申请界面的bug修复

src/views/mes/pro/return/index.vue

 <template>
   <div class="app-container">
     <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="100px">
-      <el-form-item label="产品编号" prop="itemCode">
+      <el-form-item label="产品编号" prop="sapItemCode">
         <el-input
-          v-model="queryParams.itemCode"
+          v-model="queryParams.sapItemCode"
           placeholder="请输入产品编号"
           clearable
           @keyup.enter.native="handleQuery"