feat: promotional and purchase vouchers

src/Form/Model/ParticipantDto.php

@@ -33,6 +33,8 @@ class ParticipantDto
         'licensePlate',
         'bulkInsuranceBooking',
         'insurance',
+        'purchaseVoucherCode',
+        'promoVoucherCode',
     ];
 
     public ?int $index = null;
@@ -111,6 +113,34 @@ class ParticipantDto
     // Bulk insurance booking flag (applicant only: when checked, assigns same insurance type to all participants)
     public bool $bulkInsuranceBooking = false;
 
+    /**
+     * Purchase voucher redemption code.
+     * Collected from all participants and aggregated into single <gutscheine> collection in booking payload.
+     */
+    #[Assert\Length(
+        max: 50,
+        maxMessage: 'Der Gutscheincode darf maximal {{ limit }} Zeichen lang sein'
+    )]
+    #[Assert\Regex(
+        pattern: '/^[A-Za-z0-9\-]+$/',
+        message: 'Der Gutscheincode darf nur Buchstaben, Zahlen und Bindestriche enthalten'
+    )]
+    public ?string $purchaseVoucherCode = null;
+
+    /**
+     * Promo voucher code.
+     * Applied per participant in booking payload as <aktionscode>.
+     */
+    #[Assert\Length(
+        max: 50,
+        maxMessage: 'Der Aktionscode darf maximal {{ limit }} Zeichen lang sein'
+    )]
+    #[Assert\Regex(
+        pattern: '/^[A-Za-z0-9\-]+$/',
+        message: 'Der Aktionscode darf nur Buchstaben, Zahlen und Bindestriche enthalten'
+    )]
+    public ?string $promoVoucherCode = null;
+
     /**
      * @var array<array{type: string, message: string}> Notification messages for user feedback
      */