OK

com_eis/src/View/Main/HtmlView.php

@@ -1,15 +1,20 @@
 <?php
+
 namespace EIS\Component\EIS\Administrator\View\Main;
 
 \defined('_JEXEC') or die;
-use Joomla\CMS\Factory;
+
 use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
+use EIS\Component\EIS\Administrator\Helper\TreeHelper;
+
 class HtmlView extends BaseHtmlView
 {
     public function display($tpl = null): void
     {
-        echo "<h2>Willkommen bei EIS</h2>";
-        $this->data = Factory::getApplication()->getUserState('com_eis.pdfdata');
+        // Baumdaten laden und fürs Template bereitstellen
+        $items = TreeHelper::getItems();
+        $this->treeHtml = TreeHelper::renderTree($items);
+
         parent::display($tpl);
     }
 }