randy
105651f005
Track properties gain activity_type (FIT: sport enum from the session/sport message, Garmin's own table; GPX: <trk><type> passed through as-is) alongside the existing distance/elevation/duration. Clicking a track line now opens a bottom panel with a chart per metric the track actually has (elevation always; speed/cadence/heart rate only when present — FIT's record fields or GPX's device extensions). TrackStats.build_profile computes cumulative distance the same way for both formats so they're directly comparable. One pointermove listener drives a synchronized crosshair across every chart, a single tooltip listing all series, and a map marker at the hovered point's position — hovering the chart shows where on the track that moment was.