Collapsing a day card has hidden that day's places from the map since #216, and
it was the only way to reduce a busy map to one day. The phone shell does not
render DayPlanSidebar, so when it replaced the desktop page on phones that
control disappeared with it: expandedDayIds stayed null and every day's pins sat
on top of each other with nothing to do about it (#1962).
A day chip in map view now drives the same declutter the desktop chevron drives,
rather than introducing a second filter. Entering the map focuses the selected
day, tapping another chip moves the focus with it, and leaving the map clears it
so the timeline is never looking at a filtered state. Unplanned places stay
visible, exactly as the collapse path has always left them.
214 items came out of writing the tests. Real defects are corrected, dead code
is removed rather than covered, and the tests that pinned the old behaviour
move with them.
Also drops two agent coverage scratch files that slipped into the coverage PR
and adds the ignore rule that keeps them out.
Maurice