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/yaml/Resources/bin/yaml-lint

@@ -0,0 +1,49 @@
+#!/usr/bin/env php
+<?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.
+ */
+
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
+/**
+ * Runs the Yaml lint command.
+ *
+ * @author Jan Schädlich <jan.schaedlich@sensiolabs.de>
+ */
+
+use Symfony\Component\Console\Application;
+use Symfony\Component\Yaml\Command\LintCommand;
+
+function includeIfExists(string $file): bool
+{
+    return file_exists($file) && include $file;
+}
+
+if (
+    !includeIfExists(__DIR__ . '/../../../../autoload.php') &&
+    !includeIfExists(__DIR__ . '/../../vendor/autoload.php') &&
+    !includeIfExists(__DIR__ . '/../../../../../../vendor/autoload.php')
+) {
+    fwrite(STDERR, 'Install dependencies using Composer.'.PHP_EOL);
+    exit(1);
+}
+
+if (!class_exists(Application::class)) {
+    fwrite(STDERR, 'You need the "symfony/console" component in order to run the Yaml linter.'.PHP_EOL);
+    exit(1);
+}
+
+(new Application())->addCommand($command = new LintCommand())
+    ->getApplication()
+    ->setDefaultCommand($command->getName(), true)
+    ->run()
+;