Make Produkte a flat nav item, remove Produkte navigation group

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

app/Filament/User/Resources/ProductResource.php

@@ -32,8 +32,6 @@ class ProductResource extends Resource {
     protected static ?string $navigationLabel = 'Produkte';
     protected static ?string $modelLabel = 'Produkt';
     protected static ?string $slug = 'produkt';
-    protected static ?string $navigationGroup = 'Produkte';
-    protected static ?int $navigationSort = 1;
 
     public static function form(Form $form): Form {
         return $form

app/Providers/Filament/UserPanelProvider.php

@@ -39,7 +39,6 @@ class UserPanelProvider extends PanelProvider
             ->favicon(url:'../images/favicon.png')
 
             ->navigationGroups([
-                NavigationGroup::make('Produkte'),
                 NavigationGroup::make('Lager'),
                 NavigationGroup::make('Waren Ein/Ausgang'),
                 NavigationGroup::make('Ressourcen'),