M: Add prefetching for auth

rsconcept/frontend/src/app/ApplicationLayout.tsx

@@ -33,8 +33,6 @@ function ApplicationLayout() {
   const noNavigation = useAppLayoutStore(state => state.noNavigation);
   const noFooter = useAppLayoutStore(state => state.noFooter);
 
-  // TODO: prefetch data
-
   return (
     <ErrorBoundary FallbackComponent={ErrorFallback} onError={logError} onReset={resetState}>
       <NavigationState>

rsconcept/frontend/src/main.tsx

@@ -4,6 +4,11 @@ import { createRoot } from 'react-dom/client';
 
 import App from './app';
 import GlobalProviders from './app/GlobalProviders';
+import { authApi } from './backend/auth/api';
+import { queryClient } from './backend/queryClient';
+
+// Prefetch auth data
+queryClient.prefetchQuery(authApi.getAuthQueryOptions()).catch(console.error);
 
 createRoot(document.getElementById('root')!).render(
   <GlobalProviders>