- .btn-progress fills a button's bg by --pct (setBtnProgress). Elevation
refine drives it from fetchElevations network batches (0-80%) then save
(85-100%); recompute from recalculateSession phase milestones; roads
rebuild from a new Rust roads_progress event (rebuild_roads emits
[current,total] every ~2000 points - first Rust->JS event in the app,
adds use tauri::Emitter) so it no longer just hangs silently.
- recalc/refine now reopen the detail via reopenDetail (awaits the
popstate) instead of the manual pop+history.back+render race.
- Track detail remembers its map view per session (_sdMapView, moveend) and
restores it on reopen/return instead of re-fitting the whole track; the
recording map persists its zoom in localStorage across screen switches.