feat: 员工门户UI优化 - PortalLayout/Logo组件/QR扫码登录/合同与政策页面重构

frontend/src/components/layout/SidebarNav.tsx

@@ -15,6 +15,7 @@ import {
   ChevronDown, ChevronRight,
   Building2,
 } from 'lucide-react'
+import Logo from '../ui/Logo'
 
 interface NavItem {
   path: string
@@ -120,7 +121,7 @@ export default function SidebarNav({ mobileOpen, onClose }: { mobileOpen: boolea
       >
         {/* Logo 区 */}
         <div className="h-14 flex items-center gap-2 px-4 border-b border-gray-200 shrink-0">
-          <Building2 className="w-5 h-5 text-primary" />
+          <Logo className="w-5 h-5 text-primary" />
           <span className="font-bold text-sm text-gray-900">企业用工专家</span>
         </div>