refactor: keep Scene prompts with their controls

docs/CODE-BOUNDARIES.md

@@ -323,7 +323,7 @@ original Display groups, independent scroll positions and current focus owner.
 
 ## Scene controls
 
-`ui/scenes` owns Scene panel input, project/shot rows, playback button and runtime
+`ui/scenes` owns Scene prompts, panel input, project/shot rows, playback button and runtime
 presentation. It receives project reads and explicit actions, with no imports of
 the director, source modules, camera engine or storage. Replacement and disposal
 release listeners; pending action feedback is limited to its current owner.

docs/CURRENT-STATE.md

@@ -2,7 +2,7 @@
 
 ## Scene control ownership
 
-Scene controls own panel listeners, shot rows, playback/recording presentation
+Scene controls own creation/deletion prompts, panel listeners, shot rows, playback/recording presentation
 and keyboard cancellation. The director supplies project reads and explicit
 editing/playback actions while retaining persistence, camera and layer sequencing.
 Replacing rows revokes their old listeners. Disposal stops controls immediately;