feat(frontend): Complete authentication and dashboard pages with task management

frontend-next/app/(dashboard)/layout.tsx

@@ -0,0 +1,26 @@
+'use client';
+
+import { useEffect } from 'react';
+import { useRouter } from 'next/navigation';
+import { useAuth } from '@/lib/stores';
+
+export default function DashboardLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  const router = useRouter();
+  const { user } = useAuth();
+
+  useEffect(() => {
+    if (!user) {
+      router.push('/auth/login');
+    }
+  }, [user, router]);
+
+  if (!user) {
+    return null;
+  }
+
+  return <>{children}</>;
+}