feat: 优化差旅报销预审流程与个人工作台 UI 体系

- 完善 user_agent_application 申请差旅报销预审槽位与消息组装
- 增强预算助理报告与风险建议卡片交互
- 重构登录页视觉样式与移动端响应式适配
- 优化个人工作台、文档中心、政策中心、员工管理等页面布局
- 拆分 travelRequestDetailPreReviewModel 为 advice/submit 模型
- 补充报销草稿、风险复核、Item Sync 与模板执行器测试覆盖

web/tests/app-shell-detail-alerts.test.mjs

@@ -127,7 +127,7 @@ test('application detail topbar does not ask for receipt attachments', () => {
 
 test('detail topbar surfaces stored medium and high risk flags first', () => {
   const highAlerts = buildDetailAlerts({
-    node: 'AI预审',
+    node: '待提交',
     approvalKey: 'draft',
     riskFlags: [
       {
@@ -146,7 +146,7 @@ test('detail topbar surfaces stored medium and high risk flags first', () => {
     expenseItems: []
   })
   const mediumAlerts = buildDetailAlerts({
-    node: 'AI预审',
+    node: '待提交',
     approvalKey: 'draft',
     riskFlags: [
       {