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/var-dumper/Caster/DoctrineCaster.php

@@ -0,0 +1,64 @@
+<?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\VarDumper\Caster;
+
+use Doctrine\Common\Proxy\Proxy as CommonProxy;
+use Doctrine\ORM\PersistentCollection;
+use Doctrine\ORM\Proxy\Proxy as OrmProxy;
+use Symfony\Component\VarDumper\Cloner\Stub;
+
+/**
+ * Casts Doctrine related classes to array representation.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @final
+ *
+ * @internal since Symfony 7.3
+ */
+class DoctrineCaster
+{
+    public static function castCommonProxy(CommonProxy $proxy, array $a, Stub $stub, bool $isNested): array
+    {
+        foreach (['__cloner__', '__initializer__'] as $k) {
+            if (\array_key_exists($k, $a)) {
+                unset($a[$k]);
+                ++$stub->cut;
+            }
+        }
+
+        return $a;
+    }
+
+    public static function castOrmProxy(OrmProxy $proxy, array $a, Stub $stub, bool $isNested): array
+    {
+        foreach (['_entityPersister', '_identifier'] as $k) {
+            if (\array_key_exists($k = "\0Doctrine\\ORM\\Proxy\\Proxy\0".$k, $a)) {
+                unset($a[$k]);
+                ++$stub->cut;
+            }
+        }
+
+        return $a;
+    }
+
+    public static function castPersistentCollection(PersistentCollection $coll, array $a, Stub $stub, bool $isNested): array
+    {
+        foreach (['snapshot', 'association', 'typeClass'] as $k) {
+            if (\array_key_exists($k = "\0Doctrine\\ORM\\PersistentCollection\0".$k, $a)) {
+                $a[$k] = new CutStub($a[$k]);
+            }
+        }
+
+        return $a;
+    }
+}