chore(todo): update GAL-53 status to Done and mark acceptance criteria complete

TODO/GAL-53.md

@@ -1,7 +1,7 @@
 ---
 id: GAL-53
 title: Implement a High Score system (saving/loading)
-status: Todo
+status: Done
 parent: GAL-50
 labels: [polish, ui]
 ---
@@ -12,11 +12,11 @@ Implement a High Score system (saving/loading).
 
 ## Acceptance criteria
 
-- [ ] High score persists to disk under a platform-appropriate path (e.g. `dirs::data_dir()/bglga/highscore.json`).
-- [ ] Loaded on startup into a `HighScore` resource; defaults to 0 if the file is absent or corrupt (no panic).
-- [ ] Updated only when `Score > HighScore` on entering `GameOver`, then persisted.
-- [ ] Visible on Start Menu (best so far) and Game Over (best vs current).
-- [ ] Save path overridable via env var or test-only setter so tests don't pollute the user's real config.
+- [x] High score persists to disk under a platform-appropriate path (e.g. `dirs::data_dir()/bglga/highscore.json`).
+- [x] Loaded on startup into a `HighScore` resource; defaults to 0 if the file is absent or corrupt (no panic).
+- [x] Updated only when `Score > HighScore` on entering `GameOver`, then persisted.
+- [x] Visible on Start Menu (best so far) and Game Over (best vs current).
+- [x] Save path overridable via env var or test-only setter so tests don't pollute the user's real config.
 
 ## Integration test hints
 
@@ -24,3 +24,7 @@ Implement a High Score system (saving/loading).
 - Pre-write malformed JSON; assert loader falls back to 0 and doesn't panic.
 - Run scenario: set `Score = 7000`; transition to `GameOver`; reload from disk; assert persisted value = 7000.
 - Concurrency / crash safety: write via temp file + rename, not in-place truncate.
+
+## Comments
+
+- 2026-05-07 — Branch `opencode/clever-wolf`, commit ff3416b — High score system implemented with persistence, UI display, and integration tests.