Fill Suno fields with accessibility adapter

docs/ARCHITECTURE.md

@@ -89,7 +89,10 @@ in Custom mode. The integration attempts to fill the supported title,
 lyrics and style fields but does not press Generate. If a field cannot
 be filled, it returns a field-specific result so Presentation can report
 it and offer the approved text for copying. Treat this integration as
-replaceable because website UI/behavior can change.
+replaceable because website UI/behavior can change. The macOS
+Accessibility-based field filler is an adapter behind a protocol so it
+can be replaced without changing SongProject, prompt compilation or UI
+review logic.
 
 ## Instrument Selector Boundary
 

docs/TASKS.md

@@ -109,11 +109,11 @@ requirement is missing and blocks implementation, record it in
 
 -   [x] Implement explicit `Send to Suno` action.
 -   [x] Open the appropriate Suno creation surface.
--   [ ] Fill supported fields with approved project output.
--   [ ] Never trigger Generate automatically.
--   [ ] Detect/report when fields cannot be filled rather than silently
+-   [x] Fill supported fields with approved project output.
+-   [x] Never trigger Generate automatically.
+-   [x] Detect/report when fields cannot be filled rather than silently
     failing.
--   [ ] Keep integration isolated because Suno UI can change.
+-   [x] Keep integration isolated because Suno UI can change.
 
 ## Phase 9 --- Quality