I'll modify the component to have all folders open by default and adjust the animation to prevent unwanted scaling. Here's the updated version:

Here are the key changes I've made to address your requirements:

1. Open all folders by default:

   • I've added a useEffect hook that runs once when the component mounts. It collects all folder IDs using the getAllFolderIds function and sets them as expanded in the expandedFolders state.

2. Prevent unwanted scaling during animations:

   • I've adjusted the animation settings for the Reorder.Item and its children to use spring animations with custom stiffness and damping values. This provides a smoother animation without scaling effects.
   • The layout prop is now applied to the motion.div that wraps the item content, which helps maintain the layout during animations.
   • I've added an AnimatePresence component to handle the appearance and disappearance of folder contents when expanding or collapsing.

3. Smoother animations:

   • The layoutTransition prop is added to the Reorder.Item to ensure smooth transitions when items are reordered.
   • Custom transition settings are applied to various animated elements to create a consistent and smooth feel throughout the component.

These changes should result in a file tree editor where all folders are initially expanded, and the animations are smoother without unwanted scaling effects. The drag-and-drop functionality remains intact, and you can still collapse and expand folders as needed.

Let me know if you want any further adjustments or have any questions about the implementation!