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/roster/modals.tsx

@@ -1,12 +1,10 @@
-import { useState, useRef } from "react"
-import { toast } from "sonner"
-import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query"
+import { useState } from "react"
+import { useQuery } from "@tanstack/react-query"
 import { rosterApi, socialInsuranceApi } from '../../lib/api-services'
-import Card from "../../components/ui/Card"
 import Button from "../../components/ui/Button"
 import { Input, Label, Select } from "../../components/ui/Input"
 import Modal from "../../components/ui/Modal"
-import { Users, FileText, AlertTriangle, Calendar, GraduationCap, TrendingUp, Scale, X, Plus, Paperclip, Trash2, Printer, Calculator, Shield, Info, Check, Eye, Download, UserX, UserPlus, Briefcase, FileSignature, DollarSign, Building2, RotateCcw, History } from "lucide-react"
+import { AlertTriangle, Briefcase, FileSignature } from "lucide-react"
 import { useUnsavedChanges } from "../../hooks/useUnsavedChanges"
 import { fmt } from "./shared"