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/mime/Crypto/DkimOptions.php

@@ -0,0 +1,97 @@
+<?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\Mime\Crypto;
+
+/**
+ * A helper providing autocompletion for available DkimSigner options.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class DkimOptions
+{
+    private array $options = [];
+
+    public function toArray(): array
+    {
+        return $this->options;
+    }
+
+    /**
+     * @return $this
+     */
+    public function algorithm(string $algo): static
+    {
+        $this->options['algorithm'] = $algo;
+
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function signatureExpirationDelay(int $show): static
+    {
+        $this->options['signature_expiration_delay'] = $show;
+
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function bodyMaxLength(int $max): static
+    {
+        $this->options['body_max_length'] = $max;
+
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function bodyShowLength(bool $show): static
+    {
+        $this->options['body_show_length'] = $show;
+
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function headerCanon(string $canon): static
+    {
+        $this->options['header_canon'] = $canon;
+
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function bodyCanon(string $canon): static
+    {
+        $this->options['body_canon'] = $canon;
+
+        return $this;
+    }
+
+    /**
+     * @return $this
+     */
+    public function headersToIgnore(array $headers): static
+    {
+        $this->options['headers_to_ignore'] = $headers;
+
+        return $this;
+    }
+}