- EDIT leaves the centre session cluster and sits immediately right of the gear, in the brand
column — so mode lives with the controls that configure the app, not with the session buttons.
- The gear is a LlamaCasty control, so its icon is `attention` orange instead of muted grey.
Guard: UiShellTests asserts the gear fill and that EDIT appears before the centre (session)
cluster, so a later reformat cannot quietly put it back.