UI-Verbesserungen, PWA-Icons, Branding und Settings-Erweiterung

Invertiertes Logo für Admin-Navbar, neue PWA-Icons, Manifest-Updates,
Tailwind-Config-Extraktion, Farb-/Namenseinstellungen im Admin-Bereich
und diverse Layout-Optimierungen.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

resources/views/dashboard.blade.php

@@ -1,5 +1,13 @@
 <x-layouts.app :title="__('ui.dashboard')">
-    <h1 class="text-2xl font-bold mb-6">{{ __('events.hello_user', ['name' => auth()->user()->name]) }}</h1>
+    <div class="flex items-center justify-between mb-6">
+        <h1 class="text-2xl font-bold">{{ __('events.hello_user', ['name' => auth()->user()->name]) }}</h1>
+        @if (auth()->user()->isStaff())
+            <a href="{{ route('admin.events.create') }}" class="inline-flex items-center gap-1.5 bg-blue-600 text-white px-4 py-2 rounded-md text-sm font-medium hover:bg-blue-700 transition-colors">
+                <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"/></svg>
+                {{ __('admin.new_event') }}
+            </a>
+        @endif
+    </div>
 
     {{-- Kalender --}}
     <div x-data="calendarApp()" class="mb-8">