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/RunProcessMessageHandler.php

@@ -0,0 +1,36 @@
+<?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;
+
+use Symfony\Component\Process\Exception\ProcessFailedException;
+use Symfony\Component\Process\Exception\RunProcessFailedException;
+use Symfony\Component\Process\Process;
+
+/**
+ * @author Kevin Bond <kevinbond@gmail.com>
+ */
+final class RunProcessMessageHandler
+{
+    public function __invoke(RunProcessMessage $message): RunProcessContext
+    {
+        $process = match ($message->commandLine) {
+            null => new Process($message->command, $message->cwd, $message->env, $message->input, $message->timeout),
+            default => Process::fromShellCommandline($message->commandLine, $message->cwd, $message->env, $message->input, $message->timeout),
+        };
+
+        try {
+            return new RunProcessContext($message, $process->mustRun());
+        } catch (ProcessFailedException $e) {
+            throw new RunProcessFailedException($e, new RunProcessContext($message, $e->getProcess()));
+        }
+    }
+}