Bigger rework of the mobile player around a new "practice session" concept,
plus a second page to review sessions.
Transport / sessions:
- Practice now starts a continuous SESSION clock and begins practicing the
current track. While practicing, the Play button becomes Stop and Practice
becomes Pause, so Practice starts/stops individual tracks while the session
clock keeps running. Stop (the Play button) ends the session and records it.
- Plain Play still runs the metronome with no session/recording.
- Each track-practice is one segment {name, at, sec, bpm}; sub-3s blips are
skipped. A session = {at, endedAt, clockSec, note, segments[]} stored under
metronome.sessions (replaces the old per-track metronome.logs sheet).
- Switching track / set list mid-session rolls the current segment over.
Display:
- Removed the Tap Tempo button; the BPM display now does it: tap = tap tempo,
hold = type an exact value, vertical drag = scrub.
- Detail panel shows every lane (canonical share-token chips, disabled lanes
struck through) and the active features: bar count, end behavior, ramp, and
gaps (trainer play/mute).
- Meter line shows live bar count with total (e.g. "bar 4 / 16") and elapsed
play time; the bottom bar shows live session time + track count while
recording, and links to the sessions page otherwise.
New page mobile-sessions.html: lists saved sessions, each with an editable note
(autosaved) and an aggregate table of tracks practiced in that session
(track - time - plays - bpm range), with per-session delete. PWA scope widened
to /mobile so both pages stay in the installed app + offline (SW v2).
Engine untouched; conformance suite unaffected.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
