refactor: isolate Map Source controls and selection lifecycle

docs/CODE-BOUNDARIES.md

@@ -260,3 +260,12 @@ releasing UI consumers, then destroy to remove owned stages and restore the
 borrowed bloom state. `ui/effects/bloom` exposes the pure intensity/version helpers
 without loading the renderer. UI presentation and product-action coordination
 remain in their callers.
+
+## Map Source controls
+
+`ui/maps` owns source-chip presentation, selection feedback and its subscription
+lifetime. It receives the existing controller and explicit state/action callbacks;
+it imports no renderer or application. Source construction and availability policy
+remain with the map controller. Rebuilding controls removes their previous chip
+listeners, and destruction suppresses late completions without owning or destroying
+the supplied controller.

docs/CURRENT-STATE.md

@@ -1,5 +1,14 @@
 # God's Eye View Current State
 
+## Map Source control ownership
+
+Map Source controls own chip listeners, source-state subscriptions and selection
+feedback. Loading remains with the supplied map controller. The active chip
+follows the source actually displayed, including fallback; obsolete completions
+cannot overwrite a newer selection. Refresh and destruction revoke old listeners
+and destruction suppresses late UI updates. Available choices and setup behavior
+remain unchanged.
+
 ## Visual effects ownership
 
 VisualEffects owns style-stage creation, crossfades, animation scheduling, bloom