refactor: separate Cockpit controller and presentation components

docs/CODE-BOUNDARIES.md

@@ -310,3 +310,13 @@ subscriptions. Composition supplies the manager, installations search and
 explicit visual/panel actions. `ui/context/policy` exposes the existing pure
 mode and restoration rules. No source transport or renderer is imported by
 these components; initial state and action results retain their existing shape.
+
+## Cockpit controls
+
+`ui/cockpit` supplies the Cockpit controller and Display portal. Camera updates,
+instruments, Context readouts, briefings, signals, layout and input have separate
+modules. Composition supplies the existing aircraft/awareness operations, terrain
+cache and sampling operations, continuous-render owner and regional briefing
+service. Pure math, utility layout and vision helpers have explicit exports.
+Disposal releases subscriptions and pending work; portal moves preserve the
+original Display groups, independent scroll positions and current focus owner.