fix: allow landing page to be viewed without authentication

- Remove automatic redirect from "/" to login/dashboard
- Allow everyone to view the hackathon landing page
- Users can still click "Daftar Sekarang" to go to login

This fixes the issue where the landing page immediately redirected to login.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/hackathon/src/middleware.ts

@@ -53,9 +53,8 @@ export const middleware = async ({ request }: LoaderFunctionArgs) => {
     return null;
   }
 
-  // Public routes - redirect to dashboard if already authenticated
+  // Public routes - allow everyone to view the landing page
   if (mappingPublicRoutes.includes(pathname)) {
-    if (supabaseSession) return redirect('/dashboard');
     return null;
   }