- trip_members.sort_order (per-user, migrated) drives GET /api/trips order
- PATCH /api/trips/:id/order updates only the caller's membership row
- Trip cards get a drag handle reusing the generalized row-reorder helper;
clicking the card still navigates
Calendar chips can be dragged onto another in-range day (multi-day entries shift end_date by the same delta in one PATCH); day-editor rows get a drag handle to reorder within a day, patching sort_order only for changed positions. Continues/dropoff ghost chips and stay bands are not draggable; touch devices fall back to the existing click/edit flow. Each stay band now gets a deterministic colour from an 8-hue palette by chronological index, mirrored as dots in the summary Areas list.
grabowski