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/uid/Factory/NameBasedUuidFactory.php

@@ -0,0 +1,41 @@
+<?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\Uid\Factory;
+
+use Symfony\Component\Uid\Uuid;
+use Symfony\Component\Uid\UuidV3;
+use Symfony\Component\Uid\UuidV5;
+
+class NameBasedUuidFactory
+{
+    public function __construct(
+        private string $class,
+        private Uuid $namespace,
+    ) {
+    }
+
+    public function create(string $name): UuidV5|UuidV3
+    {
+        switch ($class = $this->class) {
+            case UuidV5::class: return Uuid::v5($this->namespace, $name);
+            case UuidV3::class: return Uuid::v3($this->namespace, $name);
+        }
+
+        if (is_subclass_of($class, UuidV5::class)) {
+            $uuid = Uuid::v5($this->namespace, $name);
+        } else {
+            $uuid = Uuid::v3($this->namespace, $name);
+        }
+
+        return new $class($uuid);
+    }
+}