feat：线下订单

src/views/mallManagement/order/offline_order_list/index.vue

@@ -289,6 +289,7 @@
         <el-descriptions border title="" :column="1" :colon="false" labelStyle="width: 8%" contentStyle="width: 92%" style="margin-top: -1px">
           <el-descriptions-item label="附件">
             <el-image 
+              v-if="detailData.fileUrl"
               style="width: 100px; height: 100px"
               :src="detailData.fileUrl" 
               :preview-src-list="[detailData.fileUrl]">