feat: special treatment of participants with age 0-2 (babies)

src/Form/Service/ParticipantFieldOptionsProvider.php

@@ -16,7 +16,6 @@ use App\Form\Service\Factory\ParticipantRoomChoiceLoaderFactory;
 use App\Service\BookingPriceCalculatorService;
 use App\Service\InsuranceService;
 use App\Service\ServiceAvailabilityCalculator;
-use App\Validator\Constraints\RoomSelection;
 
 /**
  * Provides dynamic field options for participant form fields.
@@ -580,9 +579,9 @@ class ParticipantFieldOptionsProvider extends AbstractFieldOptionsProvider
                 return false;
             }
 
-            // Baby rooms only available for participants 2 years or younger
-            if (RoomSelection::BABY_ROOM_CODE === $room->code) {
-                return $age <= 2;
+            // Baby rooms only available for participants at or under BABY_MAX_AGE
+            if (Constants::BABY_ROOM_CODE === $room->code) {
+                return $age <= Constants::BABY_MAX_AGE;
             }
 
             // All other rooms available for all ages