The map route ran first-activity to last-activity only, while the sidebar
already showed the hotel-to-first-stop and last-stop-to-hotel legs with
their drive times. Feed the day's accommodation bookends into the map
route too, reusing the same getDayBookendHotels lookup and the
"optimize from accommodation" gate, so the drawn line starts and ends at
the hotel, including single-activity and transfer days.
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