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/process/Messenger/RunProcessMessage.php

@@ -0,0 +1,47 @@
+<?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\Process\Messenger;
+
+/**
+ * @author Kevin Bond <kevinbond@gmail.com>
+ */
+class RunProcessMessage implements \Stringable
+{
+    public ?string $commandLine = null;
+
+    public function __construct(
+        public readonly array $command,
+        public readonly ?string $cwd = null,
+        public readonly ?array $env = null,
+        public readonly mixed $input = null,
+        public readonly ?float $timeout = 60.0,
+    ) {
+    }
+
+    public function __toString(): string
+    {
+        return $this->commandLine ?? implode(' ', $this->command);
+    }
+
+    /**
+     * Create a process message instance that will instantiate a Process using the fromShellCommandline method.
+     *
+     * @see Process::fromShellCommandline
+     */
+    public static function fromShellCommandline(string $command, ?string $cwd = null, ?array $env = null, mixed $input = null, ?float $timeout = 60): self
+    {
+        $message = new self([], $cwd, $env, $input, $timeout);
+        $message->commandLine = $command;
+
+        return $message;
+    }
+}