refactor: 全量迁移前端 API 调用到统一 api-services 服务层

- 新建 api-services-raw.ts 导出原始 axios 方法供特殊端点使用
- 完成 api-services.ts 全领域覆盖（auth/employee/roster/dashboard/attendance/payroll/socialInsurance/commercialInsurance/termination/policies/evidence/audit/calendar/companyFiles/notifications/settings/ai/platform/portal/survey/search）
- 迁移所有 47+ 页面文件：pages/、pages/roster/、pages/portal/、pages/platform/、pages/auth/、pages/dashboard/、pages/compliance/
- 移除所有直接 import api from '../../lib/api' 引用
- 修复 Termination.tsx / WorkProcess.tsx 中 string|null 类型错误
- 修复 SocialInsurance.tsx 中 api-services-raw delete 导入名
- 修复 PlatformLogin.tsx 变量遮蔽问题
- tsc --noEmit 零错误，vite build 成功

frontend/src/components/HelpModal.tsx

@@ -3,7 +3,7 @@ import { HelpCircle, Search, ChevronDown, ChevronRight, Sparkles,
   Home, Users, FileText, Calculator, Shield, UserX, Bot, 
   Bell, Settings, Lightbulb, AlertTriangle, CheckCircle, Phone } from 'lucide-react'
 import Modal from './ui/Modal'
-import api from '../lib/api'
+import { aiApi } from '../lib/api-services'
 import clsx from 'clsx'
 
 interface HelpCategory {
@@ -267,8 +267,8 @@ export default function HelpModal({ open, onClose }: { open: boolean; onClose: (
       setRagLoading(true)
       setRagError(false)
       try {
-        const res = await api.post('/ai/rag/help-search', { query: searchQuery, topK: 8 }) as any
-        setRagResults(res.data?.results || [])
+        const res = await aiApi.ragHelpSearch(searchQuery, 8) as any
+        setRagResults(res?.results || [])
       } catch {
         setRagError(true)
         setRagResults([])

frontend/src/components/PortalQRModal.tsx

@@ -6,8 +6,7 @@ import { useState, useEffect } from 'react'
 import { QRCodeSVG } from 'qrcode.react'
 import { Smartphone, Copy, Check, Search, Loader2, User, ChevronRight } from 'lucide-react'
 import Modal from './ui/Modal'
-import api from '../lib/api'
-import { employeeApi } from '../lib/api-services'
+import { employeeApi, portalApi } from '../lib/api-services'
 
 interface Employee {
   id: string
@@ -47,8 +46,8 @@ export default function PortalQRModal({ open, onClose }: { open: boolean; onClos
     setGenerating(true)
     setAutoLoginUrl('')
     try {
-      const res = await api.post('/portal/auto-login-token', { employeeId: emp.id }) as any
-      const token = res.data?.token
+      const res = await portalApi.generateAutoLoginToken(emp.id) as any
+      const token = res?.token
       if (token) {
         setAutoLoginUrl(`${window.location.origin}/portal/auto-login?token=${token}`)
       }

frontend/src/components/SurveyModal.tsx

@@ -2,7 +2,7 @@ import { useState, useMemo, useEffect, useCallback } from 'react'
 import { Star, ChevronDown, ChevronRight, Check, Search, ClipboardList, Send, Save, RotateCcw } from 'lucide-react'
 import Modal from './ui/Modal'
 import { toast } from 'sonner'
-import api from '../lib/api'
+import { surveyApi } from '../lib/api-services'
 import { surveyPages, totalFeatures } from '../data/surveyData'
 
 interface FeatureScore {
@@ -104,7 +104,7 @@ export default function SurveyModal({ open, onClose }: { open: boolean; onClose:
     }
     setSubmitting(true)
     try {
-      await api.post('/survey/submit', { items })
+      await surveyApi.submit(items)
       toast.success(`已提交 ${items.length} 项评分，感谢您的反馈！`)
       localStorage.removeItem(STORAGE_KEY)
       setSavedAt(null)

frontend/src/components/layout/TopNav.tsx

@@ -3,7 +3,7 @@ import { ChevronDown, Settings as SettingsIcon, Bell, Menu, HelpCircle, Smartpho
 import { useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
 import { useAuthStore } from '../../store/authStore'
-import api from '../../lib/api'
+import { dashboardApi } from '../../lib/api-services'
 import Breadcrumb from './Breadcrumb'
 import HelpModal from '../HelpModal'
 import PortalQRModal from '../PortalQRModal'
@@ -19,10 +19,7 @@ export default function TopNav({ onMenuClick }: { onMenuClick?: () => void }) {
 
   const { data: dashboardData } = useQuery<any>({
     queryKey: ['dashboard'],
-    queryFn: async () => {
-      const res = await api.get('/dashboard') as any
-      return res.data
-    },
+    queryFn: () => dashboardApi.data(),
     refetchInterval: 60000,
   })
   const riskCount = dashboardData?.riskSummary?.pending || 0

frontend/src/components/ui/AIContextEntry.tsx

@@ -5,7 +5,7 @@
 import { useState, useRef, useEffect } from 'react'
 import { useMutation } from '@tanstack/react-query'
 import { Bot, Send, X, Sparkles } from 'lucide-react'
-import api from '../../lib/api'
+import { aiApi } from '../../lib/api-services'
 
 interface AIContextEntryProps {
   /** 当前页面上下文标识 */
@@ -39,7 +39,7 @@ export function AIContextEntry({ context, contextData, pageTitle }: AIContextEnt
   /** AI 问答 */
   const askMutation = useMutation({
     mutationFn: async (question: string) => {
-      const res = await api.post('/ai/context-ask', {
+      const res = await aiApi.contextAsk({
         context,
         contextData,
         pageTitle,

frontend/src/components/ui/CommandPalette.tsx

@@ -4,7 +4,7 @@
 import { useState, useEffect, useRef, useMemo } from 'react'
 import { useNavigate } from 'react-router-dom'
 import { Search, ArrowRight, Clock } from 'lucide-react'
-import api from '../../lib/api'
+import { searchApi } from '../../lib/api-services'
 
 /** 搜索结果类型 */
 interface SearchResult {
@@ -74,8 +74,8 @@ export function CommandPalette({ open, onClose }: CommandPaletteProps) {
     // 远程搜索员工
     const timer = setTimeout(async () => {
       try {
-        const res = await api.get('/search', { params: { q } }) as any
-        const remoteResults: SearchResult[] = (res.data?.employees || []).map((e: any) => ({
+        const res = await searchApi.search(q) as any
+        const remoteResults: SearchResult[] = (res?.employees || []).map((e: any) => ({
           type: 'employee' as const,
           id: e.id,
           title: e.name,