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/nesbot/carbon/lazy/Carbon/MessageFormatter/MessageFormatterMapperStrongType.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * This file is part of the Carbon package.
+ *
+ * (c) Brian Nesbitt <brian@nesbot.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Carbon\MessageFormatter;
+
+use Symfony\Component\Translation\Formatter\MessageFormatterInterface;
+
+if (!class_exists(LazyMessageFormatter::class, false)) {
+    abstract class LazyMessageFormatter implements MessageFormatterInterface
+    {
+        public function format(string $message, string $locale, array $parameters = []): string
+        {
+            return $this->formatter->format(
+                $message,
+                $this->transformLocale($locale),
+                $parameters
+            );
+        }
+    }
+}

vendor/nesbot/carbon/lazy/Carbon/MessageFormatter/MessageFormatterMapperWeakType.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * This file is part of the Carbon package.
+ *
+ * (c) Brian Nesbitt <brian@nesbot.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Carbon\MessageFormatter;
+
+use Symfony\Component\Translation\Formatter\ChoiceMessageFormatterInterface;
+use Symfony\Component\Translation\Formatter\MessageFormatterInterface;
+
+if (!class_exists(LazyMessageFormatter::class, false)) {
+    abstract class LazyMessageFormatter implements MessageFormatterInterface, ChoiceMessageFormatterInterface
+    {
+        abstract protected function transformLocale(?string $locale): ?string;
+
+        public function format($message, $locale, array $parameters = [])
+        {
+            return $this->formatter->format(
+                $message,
+                $this->transformLocale($locale),
+                $parameters
+            );
+        }
+
+        public function choiceFormat($message, $number, $locale, array $parameters = [])
+        {
+            return $this->formatter->choiceFormat($message, $number, $locale, $parameters);
+        }
+    }
+}