The journey map joins every located entry with a faint dashed line in the
order of its pins. It drew that line through everything, also across days
whose real route is on the map as a kept recording or the live Dawarich
trail, so straight guesses fanned out over the recorded track. The phone
has no layer switches, so the line could not even be hidden there.
A recorded track now carries the day it belongs to (an optional `date` on
the track contract, set by every builder of recorded lines: kept days, the
shared page's recordings, the live Dawarich trail and the day import
preview). A pure model splits the connection into the stretches still open
and those whose days were all recorded, the night between two recorded days
included. Both renderers draw only the open stretches with the entries; the
covered ones sit on a layer of their own that shows while the reader hides
what was recorded, so the guess comes back exactly where nothing else
explains the way.
The live trail is now matched to a kept day by that date instead of reading
the track name as one.
Closes#2888
Maurice
66bff5c342