function handleDragEnter()

in script.js [741:757]

• 10 lines of code
• 2 McCabe index (conditional complexity)

  function handleDragEnter(e) {
    // Remove drag-over class from all items first
    document.querySelectorAll('.tree-item.drag-over').forEach(item => {
      item.classList.remove('drag-over');
    });

    // Find the tree item element (could be a child element that received the event)
    const treeItem = e.target.closest('.tree-item');
    if (treeItem) {
      // Only apply drag-over to the most specific (lowest level) item
      // This prevents multiple highlighted ancestors
      treeItem.classList.add('drag-over');

      // Stop the event from bubbling to prevent parent handlers from firing
      e.stopPropagation();
    }
  }