Gap-fill (track detail): GPS.fillGaps now returns {points,gaps} with per-gap
status; the 🧩 control previews ONLY the filled dropouts (cyan casing; unfilled
= red dashed) with a Save/Cancel panel. Save is a reversible in-place patch
(estimated points added, original untouched; DB.saveGapFill/revertGapFill +
estimated/gap_filled columns), then recalculateSession. Revert removes them.
Route planner: renamed menu 'Нарисовать маршрут' → 'Нарисовать тренировку'
(it makes a workout session, not a route); routes empty-state now points at the
on-phone planner. showRouteEditor rewritten per-leg: each leg road (BRouter) or
straight independently, road by default, tap a leg to toggle it, long-press to
insert, silent straight fallback where no road; the global button sets all legs.