【BUG修复】添加页面中，选择部门出现BUG

导入部门时，并非只有JS需要导入，CSS也需要导入

<el-form-item label="使用部门" prop="deptId">
   <treeselect v-model="form.deptId" :options="deptOptions" :show-count="true" placeholder="请选择归属部门" />
</el-form-item>

<!--需要导入的js和css(必须)-->
import { treeselect } from '@/api/system/dept'
import "@riophae/vue-treeselect/dist/vue-treeselect.css";
import Treeselect from "@riophae/vue-treeselect";

export default {
  name: 'Information',
  components: { Treeselect },
  data() {
    return {
      // 部门树选项
      deptOptions: undefined,
      },
  methods: {
    /** 查询部门下拉树结构 */
    getTreeselect() {
      treeselect().then(response => {
        this.deptOptions = response.data;
      });
    },

这样修改后，BUG修复