feat: finalize voucher handling and discount display in summary and overview

src/BusProNet/DataProcessor/BookingDataProcessor.php

@@ -902,8 +902,9 @@ class BookingDataProcessor
             }
 
             // Add goodwill voucher as participant-level einloesecode
-            // Goodwill vouchers are excluded from inquiry bookings and only allowed in final booking requests
-            if (false === $isInquiryBooking && Constants::BOOKING_TYPE_BOOKING === $bookingType) {
+            // Goodwill vouchers are excluded from inquiry bookings (status='A') but included in final bookings (status='F')
+            // They can be sent in both validation requests (buchungsart=Anfrage) and commit requests (buchungsart=Buchung)
+            if (false === $isInquiryBooking) {
                 $goodwillCode = $this->getGoodwillVoucherCodeForParticipant($participant);
                 if (null !== $goodwillCode) {
                     $participantData['einloesecode'] = $goodwillCode;
@@ -1205,8 +1206,8 @@ class BookingDataProcessor
 
         foreach ($bookingDto->participants as $participant) {
             if (null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
-                // Exclude goodwill vouchers (flagged by field handler)
-                if (false === $participant->hasGoodwillVoucher) {
+                // Exclude goodwill vouchers
+                if (false === $participant->hasGoodwillVoucher()) {
                     $vouchers[] = trim($participant->purchaseVoucherCode);
                 }
             }
@@ -1242,7 +1243,7 @@ class BookingDataProcessor
      */
     private function getGoodwillVoucherCodeForParticipant(ParticipantDto $participant): ?string
     {
-        if (true === $participant->hasGoodwillVoucher && null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
+        if ($participant->hasGoodwillVoucher() && null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
             return trim($participant->purchaseVoucherCode);
         }