fix ts errors

frontend/src/components/Navbar/Navbar.tsx

@@ -5,7 +5,7 @@ import { useChannels } from '../../hooks/useChannels';
 import './Navbar.css';
 
 export function Navbar() {
-  const { isAuthenticated, user, logout } = useAuth();
+  const { isAuthenticated, logout } = useAuth();
   const location = useLocation();
   const [searchParams, setSearchParams] = useSearchParams();
   const { channels } = useChannels();

frontend/src/pages/HomePage.tsx

@@ -14,7 +14,7 @@ export function HomePage() {
   const sort = (searchParams.get('sort') || 'newest') as 'newest' | 'oldest' | 'popular';
   const selectedChannel = searchParams.get('channel') || undefined;
   
-  const { videos, loading, error, meta, refreshing } = useVideos({
+  const { videos, loading, error, meta } = useVideos({
     page,
     limit: 12,
     search: search || undefined,