refactor: separate Layers panel presentation from lifecycle actions

docs/CODE-BOUNDARIES.md

@@ -269,3 +269,10 @@ it imports no renderer or application. Source construction and availability poli
 remain with the map controller. Rebuilding controls removes their previous chip
 listeners, and destruction suppresses late completions without owning or destroying
 the supplied controller.
+
+## Layer panel
+
+`ui/layers` exports the Layers panel and clear-control binding. Callers supply
+snapshots, row descriptors, subscriptions and actions; the component imports no
+layer implementation or application bootstrap. Layer transactions remain with
+the caller. Hidden-page refresh scheduling remains an explicit callback.

docs/CURRENT-STATE.md

@@ -1,5 +1,14 @@
 # God's Eye View Current State
 
+## Layer panel ownership
+
+Layer rows, feed feedback, counts, focus-preserving chips and toggle listeners
+are owned by a renderer-free panel component. The layer manager supplies current
+snapshots, lifecycle actions and row descriptors. Remount and teardown remove
+listeners and row subscriptions; obsolete completions do not repaint old rows.
+The clear control presents busy state while its existing action owns the transaction.
+
+
 ## Map Source control ownership
 
 Map Source controls own chip listeners, source-state subscriptions and selection