feat: improved promotional and purchase vouchers

src/Form/Model/ParticipantDto.php

@@ -127,6 +127,15 @@ class ParticipantDto
     )]
     public ?string $purchaseVoucherCode = null;
 
+    /**
+     * Flag indicating if the purchase voucher is a goodwill (Kulanz) voucher.
+     *
+     * Goodwill vouchers are treated as promotional vouchers in BPN XML
+     * (sent as <aktionscode> per participant, not in <gutscheine> collection).
+     * Set by ParticipantPurchaseVoucherFieldHandler during form processing.
+     */
+    public bool $hasGoodwillVoucher = false;
+
     /**
      * Promo voucher code.
      * Applied per participant in booking payload as <aktionscode>.

src/Form/Model/ParticipantEditDto.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Form\Model;
 
+use App\Validator\Constraints as AppAssert;
 use Symfony\Component\Validator\Constraints as Assert;
 use Symfony\Component\Validator\Context\ExecutionContextInterface;
 
@@ -15,6 +16,8 @@ use Symfony\Component\Validator\Context\ExecutionContextInterface;
  * the participant being edited and the full booking context needed for
  * cross-participant validation.
  */
+#[AppAssert\PurchaseVoucher(groups: ['booking_create', 'booking_edit'])]
+#[AppAssert\PromoVoucher(groups: ['booking_create', 'booking_edit'])]
 class ParticipantEditDto
 {
     public function __construct(