A Folders mode next to grid and list shows one level at a time: subfolders
first with their file count and size, then the files, under a clickable
breadcrumb. Folders and files are marked with tri-state boxes that persist
while navigating; the bar shows the exact total from the core, and the
selection is recovered relative to each marked folder. The sidebar folder
tree navigates in this mode.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
