fix(roadtrip): a flight day ends at the stay it lands at, and no drive runs where nobody drives

On a day a flight, train, ferry, cruise or bus leaves and lands, tonight's stay was seated
by its check-in time. A hotel in Munich checked into from 15:00 stood ahead of a 15:15 flight
out of Hamburg, so the drive went from the Munich hotel to Hamburg airport and reported the
flight as nine hours late. A check-in is the earliest arrival, not an appointment: such a
stay now waits behind the landing when it lies nearer the arrival than the departure, and
its check-in only holds it when the ride lands before the room is ready. A time typed on the
stop keeps its seat.

With the stays at both ends of a day switched on:
- a day with nothing but the next stay's check-in and a ride booked across it gets no drive
  from one hotel to the other, the same rule the day plan follows since #2476;
- a stay is never joined by road to a terminal more than 2000 km away. The check moved to
  shared/roadtrip so Days and the road trip read one copy.

A departure terminal's pin is dated: reaching it more than half a day late no longer moves
the flight to the next day without a word, it is a late warning with the full minutes.
A check-in evening also carries the stay's check-in time, as a label only.

calculate_roadtrip runs the same code and its description says all of the above.

client/src/components/Map/dayRoutePlan.ts

@@ -1,7 +1,7 @@
 import { withHotelBookends } from './RouteCalculator'
 import { getTransportRouteEndpoints, getTransportForDay, getMergedItems, isCarrierTransport, hasCarrierEndpointOnDay } from '../../utils/dayMerge'
 import { getDayBookendHotels, shouldDrawMorningLeg, shouldDrawEveningLeg, type CarrierEdge } from '../../utils/dayOrder'
-import { withinDriveRange } from '../../utils/geo'
+import { withinDriveRange } from '@trek/shared/roadtrip'
 import type { Accommodation, AssignmentsMap, Day, Reservation } from '../../types'
 
 export const TRANSPORT_TYPES = ['flight', 'train', 'bus', 'car', 'taxi', 'bicycle', 'cruise', 'ferry', 'transit', 'transport_other']