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/Attribute/Interact.php

@@ -0,0 +1,51 @@
+<?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\Attribute;
+
+use Symfony\Component\Console\Exception\LogicException;
+
+#[\Attribute(\Attribute::TARGET_METHOD)]
+class Interact implements InteractiveAttributeInterface
+{
+    private \ReflectionMethod $method;
+
+    /**
+     * @internal
+     */
+    public static function tryFrom(\ReflectionMethod $method): ?self
+    {
+        /** @var self|null $self */
+        if (!$self = ($method->getAttributes(self::class)[0] ?? null)?->newInstance()) {
+            return null;
+        }
+
+        if (!$method->isPublic() || $method->isStatic()) {
+            throw new LogicException(\sprintf('The interactive method "%s::%s()" must be public and non-static.', $method->getDeclaringClass()->getName(), $method->getName()));
+        }
+
+        if ('__invoke' === $method->getName()) {
+            throw new LogicException(\sprintf('The "%s::__invoke()" method cannot be used as an interactive method.', $method->getDeclaringClass()->getName()));
+        }
+
+        $self->method = $method;
+
+        return $self;
+    }
+
+    /**
+     * @internal
+     */
+    public function getFunction(object $instance): \ReflectionFunction
+    {
+        return new \ReflectionFunction($this->method->getClosure($instance));
+    }
+}