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/sebastian/complexity/src/Visitor/CyclomaticComplexityCalculatingVisitor.php

@@ -0,0 +1,61 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/complexity.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\Complexity;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\BinaryOp\BooleanAnd;
+use PhpParser\Node\Expr\BinaryOp\BooleanOr;
+use PhpParser\Node\Expr\BinaryOp\LogicalAnd;
+use PhpParser\Node\Expr\BinaryOp\LogicalOr;
+use PhpParser\Node\Expr\Ternary;
+use PhpParser\Node\Stmt\Case_;
+use PhpParser\Node\Stmt\Catch_;
+use PhpParser\Node\Stmt\ElseIf_;
+use PhpParser\Node\Stmt\For_;
+use PhpParser\Node\Stmt\Foreach_;
+use PhpParser\Node\Stmt\If_;
+use PhpParser\Node\Stmt\While_;
+use PhpParser\NodeVisitorAbstract;
+
+final class CyclomaticComplexityCalculatingVisitor extends NodeVisitorAbstract
+{
+    /**
+     * @var positive-int
+     */
+    private int $cyclomaticComplexity = 1;
+
+    public function enterNode(Node $node): void
+    {
+        switch ($node::class) {
+            case BooleanAnd::class:
+            case BooleanOr::class:
+            case Case_::class:
+            case Catch_::class:
+            case ElseIf_::class:
+            case For_::class:
+            case Foreach_::class:
+            case If_::class:
+            case LogicalAnd::class:
+            case LogicalOr::class:
+            case Node\MatchArm::class:
+            case Ternary::class:
+            case While_::class:
+                $this->cyclomaticComplexity++;
+        }
+    }
+
+    /**
+     * @return positive-int
+     */
+    public function cyclomaticComplexity(): int
+    {
+        return $this->cyclomaticComplexity;
+    }
+}