feat: domain-based theme-detection

src/Twig/AppRuntime.php

@@ -5,10 +5,10 @@ declare(strict_types=1);
 namespace App\Twig;
 
 use App\BusProNet\DataProvider\CountryDataProvider;
+use App\EventListener\DomainThemeListener;
 use App\Form\Model\BookingDto;
 use App\Form\Service\CreateFieldStateProvider;
 use App\Form\Service\EditFieldStateProvider;
-use App\Service\BookingService;
 use App\Service\ParticipantEligibilityService;
 use Symfony\Component\Form\FormView;
 use Symfony\Component\HttpFoundation\RequestStack;
@@ -228,18 +228,20 @@ class AppRuntime implements RuntimeExtensionInterface
     }
 
     /**
-     * Returns the current booking theme from session.
+     * Returns the current booking theme from request attribute.
      *
+     * The theme is resolved by DomainThemeListener based on the request host.
      * Defaults to 'base' if no theme is set.
      */
     public function getBookingTheme(): string
     {
         $request = $this->requestStack->getCurrentRequest();
+
         if (null === $request) {
-            return BookingService::DEFAULT_THEME;
+            return 'base';
         }
 
-        return $request->getSession()->get(BookingService::THEME_KEY, BookingService::DEFAULT_THEME);
+        return $request->attributes->get(DomainThemeListener::THEME_ATTRIBUTE, 'base');
     }
 
     /**