wip: modernized edit flow, fix insurance tier calculation

src/Service/RoomAssignmentService.php

@@ -4,7 +4,7 @@ declare(strict_types=1);
 
 namespace App\Service;
 
-use App\Form\Model\BookingCreateDto;
+use App\Form\Model\BookingDto;
 
 /**
  * Handles automatic room assignment for booking participants.
@@ -26,9 +26,9 @@ class RoomAssignmentService
      * - 2x "Doppelzimmer" (capacity 2) = participants 0-1 → room A, participants 2-3 → room A
      * - 1x "3-Bett-Zimmer" (capacity 3) = participants 4-6 → room B
      *
-     * @param BookingCreateDto $dto The booking DTO containing room selections and participants
+     * @param BookingDto $dto The booking DTO containing room selections and participants
      */
-    public function assignParticipantsToRooms(BookingCreateDto $dto): void
+    public function assignParticipantsToRooms(BookingDto $dto): void
     {
         $participantIndex = 0;
         $selectedRooms = $dto->getSelectedRooms();