优化: 大文件拆分+代码分割+按需加载+console清理+any类型替换

- Money.tsx (2260行→54行): 拆分为 money/ 子目录4个组件, React.lazy二级分割
- AIAssistant.tsx (2038行→63行): 拆分为 ai-assistant/ 子目录6个组件, React.lazy二级分割
- xlsx改为动态导入, OvertimeTab从345KB降至12.7KB
- api-services.ts: 请求参数 any→Record<string,unknown>
- 移除前端3处console.log残留
- 后端console替换为pino logger
- 前后端未使用import/变量清理
- Zod schema验证: termination/platform/special-status/work-process
- 新增 leave.routes.ts, acceptance-test.routes.ts
- UI组件: PageGuide, QueryError, Stepper

frontend/src/pages/portal/EmployeeHome.tsx

@@ -2,12 +2,11 @@
  * 员工 Hub 首页 — 员工端统一入口
  * 展示个人概览、待办事项、快捷入口、公司公告
  */
-import { useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
 import { Link } from 'react-router-dom'
 import {
-  DollarSign, FileText, CalendarCheck, ScrollText,
-  TrendingUp, Clock, AlertCircle, ChevronRight,
+  DollarSign, FileText, CalendarCheck, ScrollText, CalendarClock,
+  AlertCircle, ChevronRight,
 } from 'lucide-react'
 import { portalApi } from '../../lib/api-services'
 import Card from '../../components/ui/Card'
@@ -21,6 +20,7 @@ const QUICK_ACTIONS = [
   { path: '/portal/payslip', label: '工资条', icon: DollarSign, color: 'bg-emerald-50 text-emerald-600' },
   { path: '/portal/contract', label: '我的合同', icon: FileText, color: 'bg-blue-50 text-blue-600' },
   { path: '/portal/attendance', label: '我的考勤', icon: CalendarCheck, color: 'bg-purple-50 text-purple-600' },
+  { path: '/portal/leave', label: '休假申请', icon: CalendarClock, color: 'bg-cyan-50 text-cyan-600' },
   { path: '/portal/policies', label: '规章制度', icon: ScrollText, color: 'bg-amber-50 text-amber-600' },
 ]