修改报修部位为必填项

src/views/mobi.vue

@@ -35,6 +35,8 @@
                 placeholder="请选择"
                 @click="showrepairAreaPicker = true"
                 :rules="[{ required: true, message: '请至少选择一项！' }]"
+                required
+                clearable
                 label-width='8em'
             />
             <van-popup v-model="showrepairAreaPicker" position="bottom">