Function handleDrop

frontend/src/components/workspace/FolderTreeView.tsx:228–253

(e: React.DragEvent, targetNode: FolderNode)

  // Handle drop
  const handleDrop = (e: React.DragEvent, targetNode: FolderNode) => {
    e.preventDefault();
    e.stopPropagation();
    
    const draggedNode = draggedNodeRef.current;
    if (draggedNode && targetNode.type === 'folder' && draggedNode.nodeId !== targetNode.id) {
      // Don't allow dropping a folder into its own descendant
      let parent = getNodeById(targetNode.id);
      let canDrop = true;
      
      while (parent) {
        if (parent.id === draggedNode.nodeId) {
          canDrop = false;
          break;
        }
        parent = parent.parentId ? getNodeById(parent.parentId) : undefined;
      }
      
      if (canDrop) {
        moveNode(draggedNode.nodeId, targetNode.id);
      }
    }
    
    setDraggedOver(null);
    draggedNodeRef.current = null;
  };

  // Handle file/folder selection
  const handleNodeClick = (node: FolderNode, e: React.MouseEvent) => {