  const cancelCheckout = useCallback(() => {
    // Track abandoned checkout (fire and forget)
    if (state.authUser || state.selectedPackage) {
      fetch('/checkout/track-abandoned', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]')?.getAttribute('content') || '',
        },
        body: JSON.stringify({
          package_id: state.selectedPackage.id,
          last_step: ['package', 'auth', 'payment', 'confirmation'].indexOf(state.currentStep) + 1,
          user_id: state.authUser?.id,
          email: state.authUser?.email,
        }),
      }).catch(error => {
        console.error('Failed to track abandoned checkout:', error);
      });
    }

    // State aus localStorage entfernen
    localStorage.removeItem('checkout-wizard-state');
    // Zur Package-Übersicht zurückleiten
    window.location.href = '/packages';
  }, [state]);
