fix: properly handle 'veg' services in booking edit flow

src/BusProNet/DataProcessor/BookingDataProcessor.php

@@ -105,6 +105,9 @@ class BookingDataProcessor
             $participantData->board = $booking
                 ->getAdditionalServicesForParticipantByGroup($index, Constants::TOKEN_BOARD);
 
+            $vegServices = $booking->getAdditionalServicesForParticipantByGroup($index, Constants::TOKEN_VEG);
+            $participantData->veg = false === empty($vegServices) ? reset($vegServices) : null;
+
             $participantData->rentals = $booking
                 ->getAdditionalServicesForParticipantByGroup($index, Constants::TOKEN_RENTALS);
 
@@ -211,6 +214,11 @@ class BookingDataProcessor
             }
         }
 
+        // Enrich veg
+        if (null !== $participant->veg && isset($travel->additionalServices[$participant->veg->id])) {
+            $participant->veg = $travel->additionalServices[$participant->veg->id];
+        }
+
         // Enrich rentals
         foreach ($participant->rentals as $key => $rental) {
             if (isset($travel->additionalServices[$rental->id])) {

src/BusProNet/DataProcessor/BookingPayloadBuilder.php

@@ -171,8 +171,8 @@ class BookingPayloadBuilder
                 '@idzimmer' => $room->id,
                 '@kategorie' => $room->category,
                 '@idverpflegung' => $room->boardId,
-                '@anreise' => $room->dateFrom ? $room->dateFrom->format('d.m.Y') : null,
-                '@abreise' => $room->dateTo ? $room->dateTo->format('d.m.Y') : null,
+                '@anreise' => $room->dateFrom?->format('d.m.Y'),
+                '@abreise' => $room->dateTo?->format('d.m.Y'),
                 '@anzahl' => $room->totalCount,
                 '@zuordnung' => implode(',', array_map(fn ($index) => $index + 1, $uniqueMapping)),
             ];

src/BusProNet/DataProcessor/ParticipantServiceProcessor.php

@@ -131,6 +131,11 @@ class ParticipantServiceProcessor
             ...$participant->rentals,
         ];
 
+        // Veg is encoded as an additional service in the edit/update payload.
+        if (null !== $participant->veg) {
+            $services[] = $participant->veg;
+        }
+
         // Add ski pass if selected (single service, not an array)
         if (null !== $participant->skiPass) {
             $services[] = $participant->skiPass;

src/Service/BookingChangeTracker.php

@@ -96,6 +96,7 @@ class BookingChangeTracker
                 'skiPass' => $participant->skiPass?->id,
                 'courses' => $this->normalizeServiceArray($participant->courses),
                 'board' => $this->normalizeServiceArray($participant->board),
+                'veg' => $participant->veg?->id,
                 'rentals' => $this->normalizeServiceArray($participant->rentals),
                 'rentalInsurance' => $participant->rentalInsurance?->id,
                 'additionalServices' => $this->normalizeServiceArray($participant->additionalServices),

src/Service/BookingEditDraftMerger.php

@@ -209,6 +209,14 @@ class BookingEditDraftMerger
                 $participant->board = $this->resolveServiceArray($data['board'], $travel->additionalServices);
             }
 
+            // Veg (single service) - merge strategy: only apply if resolves to valid service
+            if (true === array_key_exists('veg', $data) && null !== $data['veg']) {
+                $resolved = $this->resolveService($data['veg'], $travel->additionalServices);
+                if (null !== $resolved) {
+                    $participant->veg = $resolved;
+                }
+            }
+
             // Rentals (array) - overwrite strategy: user can deselect all
             if (true === array_key_exists('rentals', $data) && true === is_array($data['rentals'])) {
                 $participant->rentals = $this->resolveServiceArray($data['rentals'], $travel->additionalServices);

src/Service/BookingEditSubmitGuard.php

@@ -93,6 +93,11 @@ class BookingEditSubmitGuard
             $changed = true;
         }
 
+        if (false === $this->isSameService($participant->veg, $baseline->veg)) {
+            $participant->veg = $baseline->veg;
+            $changed = true;
+        }
+
         if (false === $this->isSameService($participant->skiPass, $baseline->skiPass)) {
             $participant->skiPass = $baseline->skiPass;
             $changed = true;