feat: improved promotional and purchase vouchers

src/Controller/Booking/Create/Step2Controller.php

@@ -150,10 +150,20 @@ class Step2Controller extends AbstractController
 
         $form->handleRequest($request);
 
+        // Collect notifications from field handlers (run during PRE_SUBMIT)
+        $notifications = $this->collectAndClearNotifications($bookingDto);
+
         if (true === $form->isSubmitted() && true === $form->isValid()) {
             // Save BookingDto to session
             $this->bookingService->saveBookingDto($request, $bookingDto, BookingDto::MODE_CREATE);
 
+            // Add notifications as flash messages (redirects destroy HTMX-triggered toasts)
+            if (false === empty($notifications)) {
+                foreach ($notifications as $notification) {
+                    $this->addFlash($notification['type'], $notification['message']);
+                }
+            }
+
             // HTMX redirect to cards view
             return $this->hxRedirect($request, $this->generateUrl('app_booking_create_step_2'));
         }
@@ -174,12 +184,21 @@ class Step2Controller extends AbstractController
 
         // HTMX request: render blocks only with OOB swap
         if ($this->isHxRequest($request)) {
-            return $this->htmxOobResponse(
+            $response = $this->htmxOobResponse(
                 'booking/_participant_form.html.twig',
                 ['participant_form', 'booking_summary'],
                 $templateData,
                 $this->generateUrl('app_booking_create_step_2_participant', ['index' => $index])
             );
+
+            // Add notifications to render response if present
+            if (false === empty($notifications)) {
+                $response->headers->set('HX-Trigger', json_encode([
+                    'showNotifications' => $notifications,
+                ]));
+            }
+
+            return $response;
         }
 
         // Regular request: render full template