fix: correct room assignment and count

closes #869c2jnzr

src/BusProNet/DataProcessor/BookingPayloadBuilder.php

@@ -172,7 +172,7 @@ class BookingPayloadBuilder
                 '@idverpflegung' => $room->boardId,
                 '@anreise' => $room->dateFrom ? $room->dateFrom->format('d.m.Y') : null,
                 '@abreise' => $room->dateTo ? $room->dateTo->format('d.m.Y') : null,
-                '@anzahl' => count($uniqueMapping),
+                '@anzahl' => $room->totalCount,
                 '@zuordnung' => implode(',', array_map(fn ($index) => $index + 1, $uniqueMapping)),
             ];
         }
@@ -456,12 +456,21 @@ class BookingPayloadBuilder
         $availableRooms = $bookingDto->travel->getAvailableRooms();
         $payload['ferienzielunterbringungen']['ferienzielunterbringung'] = [];
 
+        // Build room selection quantity lookup
+        $roomQuantities = [];
+        foreach ($bookingDto->roomSelections as $selection) {
+            if ($selection->quantity > 0) {
+                $roomQuantities[$selection->id] = $selection->quantity;
+            }
+        }
+
         foreach ($roomMap as $roomId => $participantIds) {
             $room = $availableRooms[$roomId] ?? null;
             if (null === $room) {
                 continue;
             }
 
+            $quantity = $roomQuantities[$roomId] ?? 1;
             $uniqueParticipantIds = array_unique($participantIds);
 
             $payload['ferienzielunterbringungen']['ferienzielunterbringung'][] = [
@@ -470,7 +479,7 @@ class BookingPayloadBuilder
                 '@idverpflegung' => $room->boardId,
                 '@anreise' => $bookingDto->travel->dateFrom->format('d.m.Y'),
                 '@abreise' => $bookingDto->travel->dateTo->format('d.m.Y'),
-                '@anzahl' => count($uniqueParticipantIds),
+                '@anzahl' => $quantity,
                 '@zuordnung' => implode(',', $uniqueParticipantIds),
             ];
         }