feat(auth): add /login page, session middleware, role-based navigation and logout

src/app/page.tsx

@@ -1,5 +1,13 @@
 import { redirect } from 'next/navigation';
+import { createClient } from '@/lib/supabase/server';
 
-export default function Home() {
-  redirect('/dashboard/kpis');
+export default async function Home() {
+  const supabase = await createClient();
+  const { data: { user } } = await supabase.auth.getUser();
+
+  if (user) {
+    redirect('/dashboard/kpis');
+  } else {
+    redirect('/login');
+  }
 }