Fix display voice announcements broken by poll refactor.

Replace Alpine-incompatible Set and stuck speaking lock with a plain-object queue; resume speechSynthesis and exempt display ack from CSRF.

Co-authored-by: Cursor <cursoragent@cursor.com>

bootstrap/app.php

@@ -39,6 +39,9 @@ return Application::configure(basePath: dirname(__DIR__))
         },
     )
     ->withMiddleware(function (Middleware $middleware): void {
+        $middleware->validateCsrfTokens(except: [
+            'display/*/announcements/*/played',
+        ]);
         $middleware->redirectGuestsTo(fn (Request $request) => route('sso.connect', [
             'redirect' => $request->fullUrl(),
         ]));