feat(frontend): add react spa with wishlist flows and public profile

apps/frontend/src/components/Layout/ProtectedRoute.tsx

@@ -0,0 +1,17 @@
+import { Navigate, useLocation } from 'react-router-dom';
+import type { ReactNode } from 'react';
+import { useAuthStore } from '@/features/auth/authStore';
+
+export function ProtectedRoute({ children }: { children: ReactNode }) {
+  const { user, status } = useAuthStore();
+  const location = useLocation();
+  if (status !== 'ready') {
+    return (
+      <div className="flex min-h-[50vh] items-center justify-center text-muted">Loading...</div>
+    );
+  }
+  if (!user) {
+    return <Navigate to="/login" replace state={{ from: location }} />;
+  }
+  return <>{children}</>;
+}