fix: keep browser history intact when navigating between cards view and participant form

src/Controller/Booking/Create/Step2Controller.php

@@ -120,7 +120,8 @@ class Step2Controller extends AbstractController
             return $this->htmxOobResponse(
                 'booking/create/step_2.html.twig',
                 ['participant_cards', 'booking_summary'],
-                $templateData
+                $templateData,
+                $this->generateUrl('app_booking_create_step_2')
             );
         }
 
@@ -169,21 +170,28 @@ class Step2Controller extends AbstractController
         // Get detailed pricing data for summary sidebar
         $summary = $this->bookingService->getRoomSummaryAndParticipantCount($bookingDto);
 
-        // Render form and sidebar with OOB swap using htmxOobResponse
-        // This ensures both initial load and refresh use the same block-based rendering
-        return $this->htmxOobResponse(
-            'booking/_participant_form.html.twig',
-            ['participant_form', 'booking_summary'],
-            [
-                'form' => $form->createView(),
-                'participantIndex' => $index,
-                'bookingDto' => $bookingDto,
-                'summaryData' => $summaryData,
-                'pricingData' => $summary['pricing'],
-                'refreshRouteName' => 'app_booking_create_step_2_participant_refresh',
-                'submitRouteName' => 'app_booking_create_step_2_participant',
-            ]
-        );
+        $templateData = [
+            'form' => $form->createView(),
+            'participantIndex' => $index,
+            'bookingDto' => $bookingDto,
+            'summaryData' => $summaryData,
+            'pricingData' => $summary['pricing'],
+            'refreshRouteName' => 'app_booking_create_step_2_participant_refresh',
+            'submitRouteName' => 'app_booking_create_step_2_participant',
+        ];
+
+        // HTMX request: render blocks only with OOB swap
+        if ($this->isHxRequest($request)) {
+            return $this->htmxOobResponse(
+                'booking/_participant_form.html.twig',
+                ['participant_form', 'booking_summary'],
+                $templateData,
+                $this->generateUrl('app_booking_create_step_2_participant', ['index' => $index])
+            );
+        }
+
+        // Regular request: render full template
+        return $this->render('booking/create/step_2_participant.html.twig', $templateData);
     }
 
     /**