versionCode 6. public_html/ changed, so the service worker cache goes to
bgclock-v21.
Not confirmed on device: the force-quit-and-reopen check from RELEASING.md
step 4 has not been run for this build. Nothing in it touches storage, timing
or the state machine — the change is a label, an inherited colour and a lit
button, all written from render() — but the check is still owed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>