Arrow navigation was bound to `autoFocus`, so the dropdowns that open with the
keyboard on their trigger — the composer's permission seat, the settings
pickers, the workspace and preset chips — had no walk at all, and a walk that
read its position from `document.activeElement` alternated between the first
and last row as soon as a row refused focus. The walk now works either way and
resumes from the index it last focused.
The keyboard returns to the anchor on Escape and on a selection — unless the
owner moved it itself, as a presented file card does for its preview button —
and the focused row wears the hover fill instead of the browser's ring. An open
menu takes the first Escape from the dialog it sits in.
The composer's trigger menu keeps its own Tab, which settles or drills the
highlighted candidate; Escape and Shift+Tab leave it without settling, and a
dismissed menu stays dismissed until its query changes. Opening it from the
launcher button returns the keyboard to the editor first, since the menu is a
combobox over that editor.
liukx0205
f46b025fd5