Wire up decode puzzle chain and lock terminal on file removal

Connects the previously-disconnected /decode command to per-player
messages: player 1 unlocks sudo for everyone, player 2 unlocks a scan
command that reveals which files the AI virus has locked, player 3
learns those files should be removed.

Also adds a retaliation mechanic: successfully removing a file locks
the player's terminal. The AI virus locks it out in red immediately;
the mainframe reveals a 12-character recovery code in green after 30
seconds, which can be submitted via /unlock to restore access early,
otherwise the terminal auto-recovers after 45 seconds.

src/Game/Controller/GameController.php

@@ -12,6 +12,7 @@ use App\Game\Repository\GameRepository;
 use App\Game\Repository\PlayerRepository;
 use App\Game\Repository\SessionRepository;
 use App\Game\Service\GameDashboardService;
+use App\Game\Service\GameResponseService;
 use App\Tech\Entity\User;
 use App\Game\Service\PlayerService;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
@@ -115,7 +116,8 @@ final class GameController extends AbstractController
         Request $request,
         Security $security,
         PlayerRepository $playerRepository,
-        GameDashboardService $dashboardService
+        GameDashboardService $dashboardService,
+        GameResponseService $gameResponseService
     ): Response
     {
         $user = $security->getUser();
@@ -157,11 +159,13 @@ final class GameController extends AbstractController
 
         $screen = $player ? $player->getScreen() : 0;
         $session_id = $session->getId();
+        $lock = $player ? $gameResponseService->getPublicLockState($player) : null;
 
         return $this->render('game/index.html.twig', [
             'session' => $session,
             'screen' => $screen,
             'session_id' => $session_id,
+            'lock' => $lock,
         ]);
     }