fix(form): 修复 QA 审查发现的部门树点选、领导下拉回显与导出提示问题

- useTreeBiz onSelect 守卫改为 checkable != true，兼容非勾选模式点节点选中
- DeptRoleUserSelectDropDown 详情加载不再无条件清空领导下拉值
- exportXls 捕获导出异常并提示，避免静默失败

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/Form/src/jeecg/hooks/useTreeBiz.ts

@@ -77,8 +77,8 @@ export function useTreeBiz(treeRef, getList, props, realProps, emit) {
    * 树节点选择
    */
   function onSelect(keys, info) {
-    if (props.checkable == false) {
-      checkedKeys.value = props.checkStrictly ? keys.checked : keys;
+    if (props.checkable != true) {
+      checkedKeys.value = Array.isArray(keys) ? keys : [keys];
       const { selectedNodes } = info;
       let rows = <any[]>[];
       selectedNodes.forEach((item) => {

src/components/semri/userComponent/DeptRoleUserSelectDropDown.vue

@@ -62,9 +62,12 @@ onMounted(fetchUserList);
 
 watch(
   () => [props.deptId, props.roleId],
-  () => {
-    modelValue.value = '';
-    fetchUserList();
+  async () => {
+    await fetchUserList();
+    const current = modelValue.value;
+    if (current && !userList.value.some((u) => u.username === current)) {
+      modelValue.value = '';
+    }
   },
 );
 

src/hooks/system/useMethods.ts

@@ -22,7 +22,13 @@ export function useMethods() {
    */
   async function exportXls(name, url, params, isXlsx = false) {
     //update-begin---author:wangshuai---date:2024-01-25---for:【QQYUN-8118】导出超时时间设置长点---
-    const data = await defHttp.get({ url: url, params: params, responseType: 'blob', timeout: 60000 }, { isTransformResponse: false });
+    let data;
+    try {
+      data = await defHttp.get({ url: url, params: params, responseType: 'blob', timeout: 60000 }, { isTransformResponse: false });
+    } catch (error) {
+      createMessage.error('导出失败，请稍后重试');
+      return;
+    }
     //update-end---author:wangshuai---date:2024-01-25---for:【QQYUN-8118】导出超时时间设置长点---
     if (!data) {
       createMessage.warning('文件下载失败');