fix: 修复员工服务、报销单审批及前端交互细节

- 修复员工创建时组织架构关联与邮箱校验逻辑
- 修复报销单API端点参数及预审流程调用
- 优化审批中心、差旅详情等前端页面交互
- 更新侧边栏导航与请求视图模型
- 补充员工服务与报销单相关测试用例

web/src/utils/requestViewModel.js

@@ -74,7 +74,7 @@ const BACKEND_STATUS_META = {
   paid: { key: 'completed', label: '已完成', tone: 'success' },
   completed: { key: 'completed', label: '已完成', tone: 'success' },
   supplement: { key: 'supplement', label: '待补充', tone: 'warning' },
-  returned: { key: 'supplement', label: '待补充', tone: 'warning' },
+  returned: { key: 'supplement', label: '待提交', tone: 'warning' },
   rejected: { key: 'rejected', label: '已退回', tone: 'danger' },
   cancelled: { key: 'rejected', label: '已退回', tone: 'danger' }
 }