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/laravel/framework/src/Illuminate/Routing/RouteSignatureParameters.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Illuminate\Routing;
+
+use Illuminate\Support\Reflector;
+use Illuminate\Support\Str;
+use ReflectionFunction;
+use ReflectionMethod;
+
+class RouteSignatureParameters
+{
+    /**
+     * Extract the route action's signature parameters.
+     *
+     * @param  array  $action
+     * @param  array  $conditions
+     * @return array
+     */
+    public static function fromAction(array $action, $conditions = [])
+    {
+        $callback = RouteAction::containsSerializedClosure($action)
+            ? unserialize($action['uses'])->getClosure()
+            : $action['uses'];
+
+        $parameters = is_string($callback)
+            ? static::fromClassMethodString($callback)
+            : (new ReflectionFunction($callback))->getParameters();
+
+        return match (true) {
+            ! empty($conditions['subClass']) => array_filter($parameters, fn ($p) => Reflector::isParameterSubclassOf($p, $conditions['subClass'])),
+            ! empty($conditions['backedEnum']) => array_filter($parameters, fn ($p) => Reflector::isParameterBackedEnumWithStringBackingType($p)),
+            default => $parameters,
+        };
+    }
+
+    /**
+     * Get the parameters for the given class / method by string.
+     *
+     * @param  string  $uses
+     * @return array
+     */
+    protected static function fromClassMethodString($uses)
+    {
+        [$class, $method] = Str::parseCallback($uses);
+
+        if (! method_exists($class, $method) && Reflector::isCallable($class, $method)) {
+            return [];
+        }
+
+        return (new ReflectionMethod($class, $method))->getParameters();
+    }
+}