fix: replace BuildColumnsOutlined with ApartmentOutlined

Fix TypeScript error by using valid icon name from @ant-design/icons.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/components/QuickActionsGrid.tsx

@@ -3,7 +3,7 @@ import {
   BuildOutlined,
   ImportOutlined,
   TeamOutlined,
-  BuildColumnsOutlined,
+  ApartmentOutlined,
   DollarOutlined,
   AuditOutlined,
 } from '@ant-design/icons';
@@ -33,7 +33,7 @@ const QuickActionsGrid: React.FC = () => {
       path: '/company/employees',
     },
     {
-      icon: <BuildColumnsOutlined />,
+      icon: <ApartmentOutlined />,
       title: '导入楼栋',
       description: '批量导入楼栋数据',
       themeColor: '#722ed1',