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/nunomaduro/termwind/src/Terminal.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Termwind;
+
+use Symfony\Component\Console\Terminal as ConsoleTerminal;
+
+/**
+ * @internal
+ */
+final class Terminal
+{
+    /**
+     * An instance of Symfony's console terminal.
+     */
+    private ConsoleTerminal $terminal;
+
+    /**
+     * Creates a new terminal instance.
+     */
+    public function __construct(?ConsoleTerminal $terminal = null)
+    {
+        $this->terminal = $terminal ?? new ConsoleTerminal;
+    }
+
+    /**
+     * Gets the terminal width.
+     */
+    public function width(): int
+    {
+        return $this->terminal->getWidth();
+    }
+
+    /**
+     * Gets the terminal height.
+     */
+    public function height(): int
+    {
+        return $this->terminal->getHeight();
+    }
+
+    /**
+     * Clears the terminal screen.
+     */
+    public function clear(): void
+    {
+        Termwind::getRenderer()->write("\ec");
+    }
+}