ui: 侧边栏左上角只显示公司名，不显示Logo

frontend/src/components/layout/SidebarNav.tsx

@@ -18,7 +18,6 @@ import {
   Gift, PenTool, Umbrella, GraduationCap, TrendingUp, AlertTriangle,
   DollarSign,
 } from 'lucide-react'
-import Logo from '../ui/Logo'
 import { settingsApi } from '../../lib/api-services'
 
 interface NavItem {
@@ -149,9 +148,8 @@ export default function SidebarNav({ mobileOpen, onClose }: { mobileOpen: boolea
           mobileOpen ? 'translate-x-0' : '-translate-x-full md:translate-x-0',
         )}
       >
-        {/* Logo 区 */}
-        <div className="h-14 flex items-center gap-2 px-4 border-b border-gray-200 shrink-0">
-          <Logo className="w-5 h-5 object-contain" />
+        {/* 公司名区 */}
+        <div className="h-14 flex items-center px-4 border-b border-gray-200 shrink-0">
           <span className="font-bold text-sm text-gray-900 truncate">{orgData?.name || ''}</span>
         </div>