Exposes the main command resolver's Command.FocusActivation tracker (created by the
command root, attached to the app root) down the tree, so a nested region — the grid panes, or a
feature-region bridge (e.g. the script editor) — records itself in the shared region map it reads. A
region source is an Command.ActivationTracker (a pane's LayerActivation, i.e. its z-stack, read
live) or a bare scope. That's how the toolbar's anchor follows focus into the active region and
resolves from that region's stack top.
Exposes the main command resolver's Command.FocusActivation tracker (created by the command root, attached to the app root) down the tree, so a nested region — the grid panes, or a feature-region bridge (e.g. the script editor) — records itself in the shared region map it reads. A region source is an Command.ActivationTracker (a pane's
LayerActivation, i.e. its z-stack, read live) or a bare scope. That's how the toolbar's anchor follows focus into the active region and resolves from that region's stack top.