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>

resources/views/components/flash-message.blade.php

@@ -0,0 +1,17 @@
+@props(['type' => 'success', 'message'])
+
+@php
+    $classes = match($type) {
+        'success' => 'bg-green-50 border-green-400 text-green-800',
+        'error' => 'bg-red-50 border-red-400 text-red-800',
+        'warning' => 'bg-yellow-50 border-yellow-400 text-yellow-800',
+        default => 'bg-blue-50 border-blue-400 text-blue-800',
+    };
+@endphp
+
+<div class="mb-4 p-3 border-l-4 rounded {{ $classes }}" x-data="{ show: true }" x-show="show">
+    <div class="flex justify-between items-center">
+        <p class="text-sm">{{ $message }}</p>
+        <button @click="show = false" class="ml-4 text-lg leading-none opacity-50 hover:opacity-100">&times;</button>
+    </div>
+</div>