feat: Sprint 1 — 设计Token系统 + 新导航5分组 + AppShell/PageHeader/FilterBar/DataTable组件 + 花名册导出扩充19字段 + 社保/公积金不缴纳选项 + 个税申报表导出 + 入离职/绩效统计看板

frontend/src/components/layout/SidebarNav.tsx

@@ -30,31 +30,36 @@ interface NavGroup {
 
 const navGroups: NavGroup[] = [
   {
-    title: '工作台',
+    title: '首页',
     items: [
-      { path: '/', label: '总览', icon: LayoutDashboard },
+      { path: '/', label: '工作台', icon: LayoutDashboard },
       { path: '/calendar', label: '工作日历', icon: CalendarDays },
     ],
   },
   {
-    title: '员工管理',
+    title: '团队',
     items: [
       { path: '/roster', label: '花名册', icon: Users },
       { path: '/work-process', label: '用工办理', icon: ClipboardList },
-      { path: '/attendance', label: '考勤确认', icon: CalendarCheck },
-      { path: '/termination', label: '解聘补偿', icon: UserX },
+      { path: '/termination', label: '离职管理', icon: UserX },
       { path: '/special-status', label: '特殊状态', icon: Heart },
     ],
   },
   {
-    title: '薪税社保',
+    title: '薪酬',
     items: [
       { path: '/money', label: '薪税管理', icon: Calculator },
       { path: '/social', label: '社保公积金', icon: Shield },
     ],
   },
   {
-    title: '合规风控',
+    title: '时间',
+    items: [
+      { path: '/attendance', label: '考勤排班', icon: CalendarCheck },
+    ],
+  },
+  {
+    title: '合规',
     items: [
       { path: '/evidence', label: '证据链', icon: FileSearch },
       { path: '/policies', label: '规章制度', icon: FileText },
@@ -64,15 +69,10 @@ const navGroups: NavGroup[] = [
     ],
   },
   {
-    title: 'AI 辅助',
+    title: '更多',
     items: [
       { path: '/ai-assistant', label: 'AI 顾问', icon: Bot },
       { path: '/templates', label: '文本模板', icon: BookMarked },
-    ],
-  },
-  {
-    title: '系统',
-    items: [
       { path: '/notifications', label: '通知管理', icon: Bell },
       { path: '/audit', label: '操作日志', icon: ScrollText },
       { path: '/settings', label: '设置', icon: Settings },
@@ -85,7 +85,14 @@ const navGroups: NavGroup[] = [
  */
 export default function SidebarNav({ mobileOpen, onClose }: { mobileOpen: boolean; onClose: () => void }) {
   const location = useLocation()
-  const [expandedGroups, setExpandedGroups] = useState<Set<string>>(new Set(navGroups.map(g => g.title)))
+  const isActive = (path: string) => {
+    if (path === '/') return location.pathname === '/'
+    return location.pathname.startsWith(path)
+  }
+  const activeGroup = navGroups.find(g => g.items.some(item => isActive(item.path)))
+  const [expandedGroups, setExpandedGroups] = useState<Set<string>>(
+    new Set(activeGroup ? [activeGroup.title] : ['首页'])
+  )
 
   const toggleGroup = (title: string) => {
     setExpandedGroups(prev => {
@@ -96,11 +103,6 @@ export default function SidebarNav({ mobileOpen, onClose }: { mobileOpen: boolea
     })
   }
 
-  const isActive = (path: string) => {
-    if (path === '/') return location.pathname === '/'
-    return location.pathname.startsWith(path)
-  }
-
   return (
     <>
       {/* 移动端遮罩 */}