feat: add CSV export to audit log

ui/src/pages/Admin/RolesTab.tsx

@@ -20,6 +20,7 @@ import {
   useDeleteRole,
 } from '../../api/queries/admin/rbac';
 import type { RoleDetail } from '../../api/queries/admin/rbac';
+import { PageLoader } from '../../components/PageLoader';
 import styles from './UserManagement.module.css';
 
 export default function RolesTab({ highlightId, onHighlightConsumed }: { highlightId?: string | null; onHighlightConsumed?: () => void }) {
@@ -115,7 +116,7 @@ export default function RolesTab({ highlightId, onHighlightConsumed }: { highlig
     );
   }
 
-  if (isLoading) return <Spinner size="md" />;
+  if (isLoading) return <PageLoader />;
 
   return (
     <>