feat: wrap game in centered card, style abandon button, abandon anonymous game on login

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/EventListener/AbandonAnonymousGameOnLoginListener.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\EventListener;
+
+use App\Entity\Game;
+use App\Repository\GameRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\EventDispatcher\Attribute\AsEventListener;
+use Symfony\Component\Security\Http\Event\LoginSuccessEvent;
+
+#[AsEventListener]
+class AbandonAnonymousGameOnLoginListener
+{
+    public function __construct(
+        private readonly GameRepository $gameRepository,
+        private readonly EntityManagerInterface $em,
+    ) {}
+
+    public function __invoke(LoginSuccessEvent $event): void
+    {
+        $session = $event->getRequest()->getSession();
+        $gameId = $session->get('current_game_id');
+
+        if (!$gameId) {
+            return;
+        }
+
+        $game = $this->gameRepository->find($gameId);
+
+        if ($game && $game->getStatus() === Game::STATUS_IN_PROGRESS) {
+            $game->abandon();
+            $this->em->flush();
+        }
+
+        $session->remove('current_game_id');
+    }
+}