- Render the new-folder input as a temporary tree row at the creation
location (file-explorer style): full-width input confirmed with Enter
and canceled with Escape/blur; the parent folder auto-expands, and in
list mode the row is inserted after the parent item
- Remove the drag-to-blank-area folder creation (drop-zone strip,
sidebar-level drag handlers, performDragMoveWithState); dropping models
onto folder nodes still moves them
- Update empty-state hints and locale keys accordingly
Will Miao
cc8eedcff7