chainage panel update

README.md

@@ -212,8 +212,13 @@ Distances are WGS84-ellipsoidal (no spherical bias); calibration anchors persist
                                          the column, so renaming the note is safe)
 - `GET /api/projects/:id/chainage/calibrations` — the saved calibrations, one per road-type group
                                          (`road_type, route_len_m, anchor_count, computed_by,
-                                         computed_at`) — every recompute persists one, so any user
-                                         sees what's already calibrated (member/admin)
+                                         computed_at, has_summary`) — every recompute persists one,
+                                         so any user sees what's already calibrated (member/admin)
+- `GET /api/projects/:id/chainage/summary?road_type=` — the SAVED full result of the group's last
+                                         recompute (route, spans, per-video chainage, warnings),
+                                         null if never computed; the dashboard auto-loads it so a
+                                         newly signed-in admin sees the existing compute
+                                         (member/admin)
 - `POST /api/projects/:id/chainage/recompute`  `{video_ids, road_type}` — order the videos into a
                                          route, snap the points, distribute the client-vs-GPS error
                                          piecewise-linearly; writes `chainage_*` (client) +