Trip days split on reporting gaps rendered as disconnected coloured segments. Add serve.fn_vehicle_day_track (one primary-device LineString for the EAT day), merge it into the trips API as day_track, and draw it as a faint base line beneath the per-trip colours so the route reads as one continuous drive.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
