wip: refactor to cards with individual participant forms

src/Form/Service/ParticipantAdditionalServicesFieldHandler.php

@@ -59,11 +59,12 @@ class ParticipantAdditionalServicesFieldHandler extends AbstractParticipantField
      * services are selected.
      *
      * @param array<string, mixed> $submittedData    The submitted participant form data
+     * @param string               $mode             The booking mode (BookingDto::MODE_CREATE or MODE_EDIT)
      * @param int                  $participantIndex The index of the participant being processed
      *
      * @return bool Always returns true for service selection fields
      */
-    public function shouldProcess(array $submittedData, int $participantIndex): bool
+    public function shouldProcess(array $submittedData, string $mode, int $participantIndex): bool
     {
         return true; // Always process to handle deselection cases
     }
@@ -84,6 +85,7 @@ class ParticipantAdditionalServicesFieldHandler extends AbstractParticipantField
      * 5. Updates participant with filtered valid selections
      *
      * @param array<string, mixed> $submittedData    The submitted participant form data
+     * @param string               $mode             The booking mode (BookingDto::MODE_CREATE or MODE_EDIT)
      * @param BookingDto  $bookingDto       The booking DTO to update (create or edit)
      * @param int                  $participantIndex The index of the participant being processed
      */