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/mime/Part/AbstractPart.php

@@ -0,0 +1,116 @@
+<?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\Mime\Part;
+
+use Symfony\Component\Mime\Header\Headers;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class AbstractPart
+{
+    private Headers $headers;
+
+    public function __construct()
+    {
+        $this->headers = new Headers();
+    }
+
+    public function getHeaders(): Headers
+    {
+        return $this->headers;
+    }
+
+    public function getPreparedHeaders(): Headers
+    {
+        $headers = clone $this->headers;
+        $headers->setHeaderBody('Parameterized', 'Content-Type', $this->getMediaType().'/'.$this->getMediaSubtype());
+
+        return $headers;
+    }
+
+    public function toString(): string
+    {
+        return $this->getPreparedHeaders()->toString()."\r\n".$this->bodyToString();
+    }
+
+    public function toIterable(): iterable
+    {
+        yield $this->getPreparedHeaders()->toString();
+        yield "\r\n";
+        yield from $this->bodyToIterable();
+    }
+
+    public function asDebugString(): string
+    {
+        return $this->getMediaType().'/'.$this->getMediaSubtype();
+    }
+
+    abstract public function bodyToString(): string;
+
+    abstract public function bodyToIterable(): iterable;
+
+    abstract public function getMediaType(): string;
+
+    abstract public function getMediaSubtype(): string;
+
+    public function __serialize(): array
+    {
+        if (!method_exists($this, '__sleep')) {
+            return ['headers' => $this->headers];
+        }
+
+        trigger_deprecation('symfony/mime', '7.4', 'Implementing "%s::__sleep()" is deprecated, use "__serialize()" instead.', get_debug_type($this));
+
+        $data = [];
+        foreach ($this->__sleep() as $key) {
+            try {
+                if (($r = new \ReflectionProperty($this, $key))->isInitialized($this)) {
+                    $data[$key] = $r->getValue($this);
+                }
+            } catch (\ReflectionException) {
+                $data[$key] = $this->$key;
+            }
+        }
+
+        return $data;
+    }
+
+    public function __unserialize(array $data): void
+    {
+        if ($wakeup = method_exists($this, '__wakeup') && self::class === (new \ReflectionMethod($this, '__unserialize'))->class) {
+            trigger_deprecation('symfony/mime', '7.4', 'Implementing "%s::__wakeup()" is deprecated, use "__unserialize()" instead.', get_debug_type($this));
+        }
+
+        if (['headers'] === array_keys($data)) {
+            $this->headers = $data['headers'];
+
+            if ($wakeup) {
+                $this->__wakeup();
+            }
+
+            return;
+        }
+
+        trigger_deprecation('symfony/mime', '7.4', 'Passing more than just key "headers" to "%s::__unserialize()" is deprecated, populate properties in "%s::__unserialize()" instead.', self::class, get_debug_type($this));
+
+        \Closure::bind(function ($data) use ($wakeup) {
+            foreach ($data as $key => $value) {
+                $this->{("\0" === $key[0] ?? '') ? substr($key, 1 + strrpos($key, "\0")) : $key} = $value;
+            }
+
+            if ($wakeup) {
+                $this->__wakeup();
+            }
+        }, $this, static::class)($data);
+    }
+}