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/psy/psysh/src/VarDumper/Cloner.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2026 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\VarDumper;
+
+use Symfony\Component\VarDumper\Caster\Caster;
+use Symfony\Component\VarDumper\Cloner\Data;
+use Symfony\Component\VarDumper\Cloner\Stub;
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+
+/**
+ * A PsySH-specialized VarCloner.
+ */
+class Cloner extends VarCloner
+{
+    private int $filter = 0;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function cloneVar($var, $filter = 0): Data
+    {
+        $this->filter = $filter;
+
+        return parent::cloneVar($var, $filter);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function castResource(Stub $stub, $isNested): array
+    {
+        return Caster::EXCLUDE_VERBOSE & $this->filter ? [] : parent::castResource($stub, $isNested);
+    }
+}