hotfix: Implement client-side dashboard redirect with loading spinner, improve authentication error handling by clearing user state on 401, and extend SSO redirect loop protection.

src/app/page.tsx

@@ -1,11 +1,18 @@
-import { redirect } from 'next/navigation';
+'use client';
+
+import { useEffect } from 'react';
+import { useRouter } from 'next/navigation';
 
 export default function Home() {
-  redirect('/dashboard');
+  const router = useRouter();
+
+  useEffect(() => {
+    router.replace('/dashboard');
+  }, [router]);
 
   return (
     <main className='w-full h-full min-h-screen flex flex-row justify-center items-center'>
-      <h1>LTI ERP</h1>
+      <span className='loading loading-spinner loading-lg'></span>
     </main>
   );
 }