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/translation/Dumper/CsvFileDumper.php

@@ -0,0 +1,54 @@
+<?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\Translation\Dumper;
+
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * CsvFileDumper generates a csv formatted string representation of a message catalogue.
+ *
+ * @author Stealth35
+ */
+class CsvFileDumper extends FileDumper
+{
+    private string $delimiter = ';';
+    private string $enclosure = '"';
+
+    public function formatCatalogue(MessageCatalogue $messages, string $domain, array $options = []): string
+    {
+        $handle = fopen('php://memory', 'r+');
+
+        foreach ($messages->all($domain) as $source => $target) {
+            fputcsv($handle, [$source, $target], $this->delimiter, $this->enclosure, '\\');
+        }
+
+        rewind($handle);
+        $output = stream_get_contents($handle);
+        fclose($handle);
+
+        return $output;
+    }
+
+    /**
+     * Sets the delimiter and escape character for CSV.
+     */
+    public function setCsvControl(string $delimiter = ';', string $enclosure = '"'): void
+    {
+        $this->delimiter = $delimiter;
+        $this->enclosure = $enclosure;
+    }
+
+    protected function getExtension(): string
+    {
+        return 'csv';
+    }
+}