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/prompts/src/Concerns/Interactivity.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Laravel\Prompts\Concerns;
+
+use Laravel\Prompts\Exceptions\NonInteractiveValidationException;
+
+trait Interactivity
+{
+    /**
+     * Whether to render the prompt interactively.
+     */
+    protected static bool $interactive;
+
+    /**
+     * Set interactive mode.
+     */
+    public static function interactive(bool $interactive = true): void
+    {
+        static::$interactive = $interactive;
+    }
+
+    /**
+     * Return the default value if it passes validation.
+     */
+    protected function default(): mixed
+    {
+        $default = $this->value();
+
+        $this->validate($default);
+
+        if ($this->state === 'error') {
+            throw new NonInteractiveValidationException($this->error);
+        }
+
+        return $default;
+    }
+}