docs: update project handoff

CLAUDE_REVIEW_HUD_PROPOSAL.md

@@ -1,5 +1,23 @@
 # Claude Review Request: Game Scene HUD Polish
 
+## Status
+
+This proposal has mostly been implemented and superseded by the current UI-quality pass.
+
+Implemented since this proposal:
+
+- ScoreCanvas was moved closer to the player.
+- Left/right HUD structure was created.
+- Multiplier ring background and song progress bar were added.
+- Song current time / total time is displayed.
+- Result screen polish has become the current priority.
+
+Remaining HUD follow-up:
+
+- Verify HUD readability in Play Mode.
+- Consider migrating HUD labels from legacy `UI.Text` to TMP after the result screen is stable.
+- Add rank/multiplier micro animations only after static layout is approved.
+
 ## Goal
 
 Match the Game scene HUD closer to the provided Beat Saber-style reference: