Races: start, checkpoints, and finish

The “Checkpoints” screen is built as a route thread from top to bottom: Start → Checkpoints → Finish. Each point has coordinates, class assignments, and a marshal.

1. Set up the Start: coordinates come from the “Current location” button (while standing on the spot), from picking on the map, or by manual entry.
2. Add checkpoints along the course. Each has classes (“All” by default; a checkpoint can be kept for only some classes), an optional name (“CP-2 Ford”), and coordinates. The order is changed with the arrows.
3. The Finish works like the start; if the start and finish share a spot, there’s a “Copy start coordinates” button.
4. Assign marshals — by phone number or Enduro ID; recent helpers are suggested. A marshal records passings at their checkpoint on their own phone.