traduction + alert

src/Controller/DemoController.php

@@ -6,6 +6,8 @@ use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Attribute\Route;
 
+use Symfony\Contracts\Translation\TranslatorInterface;
+
 final class DemoController extends AbstractController
 {
     #[Route('/demo/index', name: 'app_demo_index')]
@@ -18,6 +20,9 @@ final class DemoController extends AbstractController
     #[Route('/demo/empty', name: 'app_demo_empty')]
     public function empty(): Response
     {   
+        $this->addFlash('danger', " <strong>Well done!</strong> You successfully read this important alert message.");
+        
+        //$this->addFlash('success', $this->translator->trans('conference.success_create_message', array(), 'Admin'));
         return $this->render('demo/empty.html.twig', []);
     }