feat(erpProjectChange): 优化审批页返回逻辑

- 统一关闭当前标签页并返回上一页的行为
- 审批完成回调改为调用统一返回函数
- 移除重复加载表单数据调用，提升用户体验

src/views/oa/erp/erpProjectChange/edit.vue

@@ -508,7 +508,9 @@ const handleSave = async (action: 'draft' | 'submit') => {
 };
 
 const goBack = () => {
-  router.back();
+  // 统一行为：关闭当前 tab，并返回上一页
+  proxy?.$tab.closePage(route as any);
+  router.go(-1);
 };
 
 const handleApprovalSubmit = async (status: string, _mode: boolean) => {
@@ -529,7 +531,8 @@ const handleApprovalRecord = () => {
 };
 
 const submitCallback = async () => {
-  await loadFormData();
+  // 审批完成后的回调也保持与提交/暂存一致：退出当前编辑页
+  goBack();
 };
 
 const loadFormData = async () => {