Stand: SMTP-Test, Admin-Mail-Tab, Notifiable-Fix, Lazy-Quill

- Fix: Notifiable-Trait zum User-Model hinzugefuegt (behebt notify()-500er)
- Installer: SMTP-Verbindungstest mit EsmtpTransport + Ueberspringen-Link
- Admin: Neuer E-Mail-Tab mit SMTP-Konfiguration + Verbindungstest
- Admin: Lazy Quill-Initialisierung (nur sichtbare Locale wird geladen)
- Uebersetzungen: 17 neue Mail-Keys in allen 6 Sprachen

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vendor/symfony/console/Event/ConsoleAlarmEvent.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Event;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+final class ConsoleAlarmEvent extends ConsoleEvent
+{
+    public function __construct(
+        Command $command,
+        InputInterface $input,
+        OutputInterface $output,
+        private int|false $exitCode = 0,
+    ) {
+        parent::__construct($command, $input, $output);
+    }
+
+    public function setExitCode(int $exitCode): void
+    {
+        if ($exitCode < 0 || $exitCode > 255) {
+            throw new \InvalidArgumentException('Exit code must be between 0 and 255.');
+        }
+
+        $this->exitCode = $exitCode;
+    }
+
+    public function abortExit(): void
+    {
+        $this->exitCode = false;
+    }
+
+    public function getExitCode(): int|false
+    {
+        return $this->exitCode;
+    }
+}