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/string/TruncateMode.php

@@ -0,0 +1,42 @@
+<?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\String;
+
+enum TruncateMode
+{
+    /**
+     * Will cut exactly at given length.
+     *
+     * Length: 14
+     * Source: Lorem ipsum dolor sit amet
+     * Output: Lorem ipsum do
+     */
+    case Char;
+
+    /**
+     * Returns the string up to the last complete word containing the specified length.
+     *
+     * Length: 14
+     * Source: Lorem ipsum dolor sit amet
+     * Output: Lorem ipsum
+     */
+    case WordBefore;
+
+    /**
+     * Returns the string up to the complete word after or at the given length.
+     *
+     * Length: 14
+     * Source: Lorem ipsum dolor sit amet
+     * Output: Lorem ipsum dolor
+     */
+    case WordAfter;
+}