The v3 library loaded the best-accuracy map (/api/stats/best) once into
state.accuracy at render time and only refreshed it on a full re-render.
The play->return flow takes the screen-entry fast-path that restores the
cached grid DOM without re-fetching, so a just-earned score stayed
invisible on the card until the next app restart re-ran render().
stats-recorder now emits a `stats:recorded` event (filename/arrangement)
once the scored POST /api/stats resolves on the server -- the correct
moment, since song:stop fires before the POST completes. songs.js
listens: if the library is the active screen it re-fetches
/api/stats/best and patches the affected card/row badge in place;
otherwise it marks the filename dirty and onV3SongsScreenEnter applies
it on return. A failed fetch keeps the entry dirty so a later trigger
retries instead of silently dropping the update.
Badge markup is factored into a shared accuracyBadge(filename, variant)
(grid pill + tree-row percentage, both tagged .fb-acc-badge) so the
in-place repaintAccuracy can find and replace them without a full list
re-render, preserving scroll and pagination. The old empty song:stop
"refresh lazily next render" placeholder is replaced.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
