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/components/ui/CommandPalette.tsx

@@ -24,6 +24,7 @@ const QUICK_PAGES: SearchResult[] = [
   { type: 'page', id: 'social', title: '社保公积金', link: '/social', icon: 'shield' },
   { type: 'page', id: 'termination', title: '离职管理', link: '/termination', icon: 'userX' },
   { type: 'page', id: 'attendance', title: '考勤排班', link: '/attendance', icon: 'calendar' },
+  { type: 'page', id: 'leave-approval', title: '休假审批', link: '/leave-approval', icon: 'calendar' },
   { type: 'page', id: 'risk-center', title: '风险中心', link: '/risk-center', icon: 'alert' },
   { type: 'page', id: 'salary-dashboard', title: '薪酬分析', link: '/salary-dashboard', icon: 'chart' },
   { type: 'page', id: 'policies', title: '规章制度', link: '/policies', icon: 'file' },

frontend/src/components/ui/ErrorBoundary.tsx

@@ -23,8 +23,8 @@ export default class ErrorBoundary extends Component<Props, State> {
     return { hasError: true, error }
   }
 
-  componentDidCatch(error: Error, errorInfo: React.ErrorInfo) {
-    console.error('ErrorBoundary caught:', error, errorInfo)
+  componentDidCatch(_error: Error, _errorInfo: React.ErrorInfo) {
+    // 错误已通过 getDerivedStateFromError 捕获并展示降级 UI
   }
 
   handleReset = () => {

frontend/src/components/ui/PageGuide.tsx

@@ -0,0 +1,37 @@
+/**
+ * PageGuide 页面操作指导组件 — 折叠式，默认收起
+ * 统一用于各页面/Tab的操作说明，点击展开查看
+ */
+import { useState, ReactNode } from 'react'
+import { ChevronRight, Lightbulb } from 'lucide-react'
+
+interface PageGuideProps {
+  /** 指导标题，默认"操作说明" */
+  title?: string
+  /** 指导内容，支持字符串或自定义JSX */
+  children: ReactNode
+  /** 额外类名 */
+  className?: string
+}
+
+export default function PageGuide({ title = '操作说明', children, className = '' }: PageGuideProps) {
+  const [open, setOpen] = useState(false)
+
+  return (
+    <div className={`rounded-md border border-blue-100 bg-blue-50/50 ${className}`}>
+      <button
+        onClick={() => setOpen(!open)}
+        className="flex items-center gap-1.5 w-full px-3 py-1.5 text-xs font-medium text-blue-600 hover:text-blue-700 transition-colors"
+      >
+        <ChevronRight className={`w-3 h-3 transition-transform ${open ? 'rotate-90' : ''}`} />
+        <Lightbulb className="w-3.5 h-3.5" />
+        {title}
+      </button>
+      {open && (
+        <div className="px-3 pb-2.5 text-xs text-blue-600/80 leading-relaxed">
+          {children}
+        </div>
+      )}
+    </div>
+  )
+}

frontend/src/components/ui/QueryError.tsx

@@ -0,0 +1,36 @@
+import { AlertCircle, RefreshCw } from 'lucide-react'
+
+interface QueryErrorProps {
+  error?: unknown
+  onRetry?: () => void
+  message?: string
+}
+
+/**
+ * 查询错误状态组件
+ * 在 useQuery 的 isError 状态下显示错误提示和重试按钮
+ */
+export default function QueryError({ error, onRetry, message }: QueryErrorProps) {
+  const errMsg = message
+    || (error as any)?.response?.data?.error?.message
+    || (error as any)?.message
+    || '数据加载失败，请稍后重试'
+
+  return (
+    <div className="flex flex-col items-center justify-center py-12 px-4 text-center">
+      <div className="w-12 h-12 rounded-full bg-red-50 flex items-center justify-center mb-3">
+        <AlertCircle className="w-6 h-6 text-red-500" />
+      </div>
+      <p className="text-sm text-gray-600 mb-3 max-w-md">{errMsg}</p>
+      {onRetry && (
+        <button
+          onClick={onRetry}
+          className="inline-flex items-center gap-1.5 px-3 py-1.5 text-sm font-medium text-primary bg-primary/5 rounded-lg hover:bg-primary/10 transition-colors"
+        >
+          <RefreshCw className="w-3.5 h-3.5" />
+          重试
+        </button>
+      )}
+    </div>
+  )
+}

frontend/src/components/ui/Stepper.tsx

@@ -2,7 +2,6 @@
  * Stepper 步骤条组件 — 用于多步骤工作流引导
  * 支持横向/纵向布局、可点击步骤导航、完成/当前/待办状态
  */
-import { ReactNode } from 'react'
 import clsx from 'clsx'
 import { Check } from 'lucide-react'
 
@@ -24,7 +23,6 @@ interface StepperProps {
  * Stepper 步骤条 — 展示工作流进度和步骤导航
  */
 export function Stepper({ steps, orientation = 'horizontal', onStepClick, className }: StepperProps) {
-  const currentIndex = steps.findIndex(s => s.status === 'current')
 
   if (orientation === 'vertical') {
     return (