feat: implement hx-boost for reliable loading indication

src/Controller/Booking/Create/IndexController.php

@@ -107,11 +107,11 @@ class IndexController extends AbstractController
     }
 
     /**
-     * Cancels the active booking session and returns to the login page.
+     * Cancels the active booking session and returns to the appropriate page.
      *
      * This endpoint allows users to exit the booking flow at any time by
-     * clearing the booking session data and redirecting them back to the
-     * regular login screen.
+     * clearing the booking session data and redirecting them to the account
+     * dashboard (if logged in) or login page (if guest).
      */
     #[Route('/bookings/cancel', name: 'app_booking_cancel')]
     public function cancel(Request $request): Response
@@ -127,8 +127,10 @@ class IndexController extends AbstractController
             // Add a flash message to inform the user
             $this->addFlash('info', 'Buchung abgebrochen.');
 
-            // Redirect to login page
-            return $this->hxRedirect($request, $this->generateUrl('app_login'));
+            // Redirect to account dashboard if logged in, otherwise to login page
+            $targetRoute = null !== $this->getUser() ? 'app_account' : 'app_login';
+
+            return $this->redirectToRoute($targetRoute);
         }
 
         return $this->render('booking/modal_cancel.html.twig');

src/Controller/Booking/Create/Step1Controller.php

@@ -55,12 +55,6 @@ class Step1Controller extends AbstractController
         }
 
         $form = $this->createForm(BookingCreateStep1Type::class, $bookingCreateDto, [
-            'attr' => [
-                'hx-post' => $this->generateUrl('app_booking_create_step_1'),
-                'hx-target' => '#form-wrapper',
-                'hx-select' => '#form-wrapper',
-                'hx-swap' => 'outerHTML',
-            ],
             'validation_groups' => ['booking_create_step_1'],
         ]);
 
@@ -80,7 +74,7 @@ class Step1Controller extends AbstractController
             // Clear baseline snapshot when moving to step 2
             $this->bookingService->clearBaselineSnapshot($request);
 
-            return $this->hxRedirect($request, $this->generateUrl('app_booking_create_step_2'));
+            return $this->redirectToRoute('app_booking_create_step_2');
         }
 
         // Get complete summary data (pricing, rooms, CMS data)

src/Controller/Booking/Create/Step2Controller.php

@@ -94,7 +94,7 @@ class Step2Controller extends AbstractController
             $this->bookingService->saveBookingDto($request, $bookingCreateDto, BookingDto::MODE_CREATE);
 
             // Proceed to Step 3
-            return $this->hxRedirect($request, $this->generateUrl('app_booking_create_step_3'));
+            return $this->redirectToRoute('app_booking_create_step_3');
         }
 
         // Generate cards data with validation state if form was submitted and failed
@@ -112,17 +112,6 @@ class Step2Controller extends AbstractController
             'summaryData' => $summaryData,
         ];
 
-        // HTMX request: render blocks only
-        if ($this->isHxRequest($request)) {
-            return $this->htmxOobResponse(
-                'booking/create/step_2.html.twig',
-                ['participant_cards', 'booking_summary'],
-                $templateData,
-                $this->generateUrl('app_booking_create_step_2')
-            );
-        }
-
-        // Regular request: render full template
         return $this->render('booking/create/step_2.html.twig', $templateData);
     }
 
@@ -162,7 +151,7 @@ class Step2Controller extends AbstractController
             $this->addNotificationsAsFlashMessages($notifications);
 
             // HTMX redirect to cards view
-            return $this->hxRedirect($request, $this->generateUrl('app_booking_create_step_2'));
+            return $this->redirectToRoute('app_booking_create_step_2');
         }
 
         // Get complete summary data (pricing, rooms, CMS data)
@@ -174,29 +163,8 @@ class Step2Controller extends AbstractController
             'bookingDto' => $bookingDto,
             'summaryData' => $summaryData,
             '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)) {
-            $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
         return $this->render('booking/create/step_2_participant.html.twig', $templateData);
     }
 
@@ -226,8 +194,7 @@ class Step2Controller extends AbstractController
             $request,
             $bookingDto,
             $index,
-            'app_booking_create_step_2_participant_refresh',
-            'app_booking_create_step_2_participant'
+            'app_booking_create_step_2_participant_refresh'
         );
     }
 }

src/Controller/Booking/Create/Step3Controller.php

@@ -103,7 +103,7 @@ class Step3Controller extends AbstractController
 
                         $this->addFlash('info', $message);
 
-                        return $this->hxRedirect($request, $this->generateUrl('app_booking_create_step_4'));
+                        return $this->redirectToRoute('app_booking_create_step_4');
                     }
 
                     // Not a fallback scenario - show validation error
@@ -153,7 +153,7 @@ class Step3Controller extends AbstractController
                     $this->addFlash('info', $inquiryResponse->message);
                 }
 
-                return $this->hxRedirect($request, $this->generateUrl('app_booking_create_step_4'));
+                return $this->redirectToRoute('app_booking_create_step_4');
             } catch (TimeoutException $e) {
                 return $this->handleApiError(
                     'Booking inquiry timeout',

src/Controller/Booking/Create/Step4Controller.php

@@ -104,7 +104,7 @@ class Step4Controller extends AbstractController
                 $this->clearTravelDataCache($bookingCreateDto);
                 $this->bookingService->clearBookingDto($request, BookingDto::MODE_CREATE);
 
-                return $this->hxRedirect($request, $this->generateUrl('app_booking_create_success'));
+                return $this->redirectToRoute('app_booking_create_success');
             } catch (TimeoutException $e) {
                 return $this->handleApiError(
                     'Booking creation timeout',