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/DsCaster.php

@@ -0,0 +1,70 @@
+<?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 Ds\Collection;
+use Ds\Map;
+use Ds\Pair;
+use Symfony\Component\VarDumper\Cloner\Stub;
+
+/**
+ * Casts Ds extension classes to array representation.
+ *
+ * @author Jáchym Toušek <enumag@gmail.com>
+ *
+ * @final
+ */
+class DsCaster
+{
+    public static function castCollection(Collection $c, array $a, Stub $stub, bool $isNested): array
+    {
+        $a[Caster::PREFIX_VIRTUAL.'count'] = $c->count();
+        $a[Caster::PREFIX_VIRTUAL.'capacity'] = $c->capacity();
+
+        if (!$c instanceof Map) {
+            $a += $c->toArray();
+        }
+
+        return $a;
+    }
+
+    public static function castMap(Map $c, array $a, Stub $stub, bool $isNested): array
+    {
+        foreach ($c as $k => $v) {
+            $a[] = new DsPairStub($k, $v);
+        }
+
+        return $a;
+    }
+
+    public static function castPair(Pair $c, array $a, Stub $stub, bool $isNested): array
+    {
+        foreach ($c->toArray() as $k => $v) {
+            $a[Caster::PREFIX_VIRTUAL.$k] = $v;
+        }
+
+        return $a;
+    }
+
+    public static function castPairStub(DsPairStub $c, array $a, Stub $stub, bool $isNested): array
+    {
+        if ($isNested) {
+            $stub->class = Pair::class;
+            $stub->value = null;
+            $stub->handle = 0;
+
+            $a = $c->value;
+        }
+
+        return $a;
+    }
+}