frontend/src/components/layout/page-header.tsx

export function PageHeader({
  title,
  subtitle,
  action,
}: {
  title: string;
  subtitle?: string;
  action?: React.ReactNode;
}) {
  return (
    <div className="flex flex-wrap items-end justify-between gap-4 border-b border-border pb-4">
      <div>
        <h1 className="text-2xl font-bold tracking-tight">{title}</h1>
        {subtitle && (
          <p className="mt-1 text-sm text-muted-foreground">{subtitle}</p>
        )}
      </div>
      {action}
    </div>
  );
}