fix: restore drag-and-drop + onPointerDown stopPropagation on button — both work on all resolutions

frontend/src/components/contacts/ContactFolderTree.tsx

@@ -153,6 +153,11 @@ function FolderTreeItem({
   return (
     <div>
       <div
+        draggable
+        onDragStart={(e) => {
+          e.dataTransfer.setData('text/folder-id', node.id);
+          e.dataTransfer.effectAllowed = 'move';
+        }}
         onDragOver={(e) => onDragOver(e, node.id)}
         onDragLeave={() => onDragLeave(node.id)}
         onDrop={(e) => onDrop(e, node.id)}
@@ -179,6 +184,8 @@ function FolderTreeItem({
         )}
         <button
           type="button"
+          draggable={false}
+          onPointerDown={(e) => { e.stopPropagation(); }}
           onClick={(e) => { e.stopPropagation(); e.preventDefault(); onMoreClick(e, node.id); }}
           className="flex-shrink-0 text-secondary-400 hover:text-primary-600 p-1.5 rounded hover:bg-secondary-100 transition-colors touch-manipulation"
           title="Optionen"