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/routing/Loader/AttributeServicesLoader.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\Routing\Loader;
+
+use Symfony\Component\Config\Loader\Loader;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * Loads routes from a list of tagged classes by delegating to the attribute class loader.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+final class AttributeServicesLoader extends Loader
+{
+    /**
+     * @param class-string[] $taggedClasses
+     */
+    public function __construct(
+        private array $taggedClasses = [],
+    ) {
+    }
+
+    public function load(mixed $resource, ?string $type = null): RouteCollection
+    {
+        $collection = new RouteCollection();
+
+        foreach ($this->taggedClasses as $class) {
+            $collection->addCollection($this->import($class, 'attribute'));
+        }
+
+        return $collection;
+    }
+
+    public function supports(mixed $resource, ?string $type = null): bool
+    {
+        return 'routing.controllers' === $resource;
+    }
+}