WorkoutChart, the line of every chart in Train (a day's heart rate and skin
temperature, a workout's, a route's height): held, a line marks the point
nearest the finger and follows it as it moves, its value beside the title,
with its moment where the chart says how to write it (a day's heart rate:
the time of day). A tap does nothing; lifting the finger clears it (the
developer's review of 3 Nov 2026, as stock charts do).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>