Add a Pane `forceCollapsed` prop — collapses the track without writing to
the store (so the saved open state restores when the window widens) while
keeping hoverReveal alive (unlike `disabled`, which suppresses it).
desktop-controller watches (max-width: 600px) and force-collapses the chat
sidebar + file browser, so on a narrow window both rails get out of the way
and the hover-reveal overlay becomes the way in.
Brooklyn Nicholson
e6f437e6c0