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/league/uri-interfaces/IPv4/NativeCalculator.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * League.Uri (https://uri.thephpleague.com)
+ *
+ * (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace League\Uri\IPv4;
+
+use function floor;
+use function intval;
+
+final class NativeCalculator implements Calculator
+{
+    public function baseConvert(mixed $value, int $base): int
+    {
+        return intval((string) $value, $base);
+    }
+
+    public function pow(mixed $value, int $exponent)
+    {
+        return $value ** $exponent;
+    }
+
+    public function compare(mixed $value1, mixed $value2): int
+    {
+        return $value1 <=> $value2;
+    }
+
+    public function multiply(mixed $value1, mixed $value2): int
+    {
+        return $value1 * $value2;
+    }
+
+    public function div(mixed $value, mixed $base): int
+    {
+        return (int) floor($value / $base);
+    }
+
+    public function mod(mixed $value, mixed $base): int
+    {
+        return $value % $base;
+    }
+
+    public function add(mixed $value1, mixed $value2): int
+    {
+        return $value1 + $value2;
+    }
+
+    public function sub(mixed $value1, mixed $value2): int
+    {
+        return $value1 - $value2;
+    }
+}