wip: finalize implementation

src/Controller/Booking/Traits/BookingCreateTrait.php

@@ -5,7 +5,9 @@ declare(strict_types=1);
 namespace App\Controller\Booking\Traits;
 
 use App\Form\Model\BookingDto;
+use Symfony\Component\Form\FormInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpFoundation\Response;
 
 /**
  * Provides common functionality for booking creation controllers.
@@ -78,4 +80,20 @@ trait BookingCreateTrait
             'groupedSelectedRooms' => $groupedSelectedRooms,
         ];
     }
+
+    /**
+     * Handles API errors by logging, adding flash message, and rendering the form.
+     */
+    private function handleApiError(
+        string $logMessage,
+        array $context,
+        string $flashMessage,
+        BookingDto $bookingCreateDto,
+        FormInterface $form,
+    ): Response {
+        $this->logger->error($logMessage, $context);
+        $this->addFlash('error', $flashMessage);
+
+        return $this->renderStepForm($bookingCreateDto, $form);
+    }
 }

src/Controller/Booking/Traits/ParticipantCardFlowTrait.php

@@ -67,7 +67,6 @@ trait ParticipantCardFlowTrait
         // Merge default options with provided options
         $formOptions = array_merge([
             'booking_context' => $bookingDto,
-            'edit_mode' => BookingDto::MODE_EDIT === $bookingDto->getMode(),
         ], $options);
 
         return $this->createForm(BookingParticipantType::class, $participant, $formOptions);