feat(routes): add realtime estimates panel with pattern-aware styling

- New GET /api/stops/estimates endpoint (nano mode: tripId, patternId, estimate, delay only)
- useStopEstimates hook wiring estimates to routes-$id stop panel
- Pattern-aware styling: dim schedules and estimates from other patterns
- Past scheduled departures shown with strikethrough instead of hidden
- Persist selected pattern in URL hash (replace navigation, no history push)
- Fix planner arrivals using new estimates endpoint

1 files changed, 2 insertions, 0 deletions

diff --git a/src/frontend/app/data/PlannerApi.ts b/src/frontend/app/data/PlannerApi.ts
index 43c8ae1..6f39f50 100644
--- a/src/frontend/app/data/PlannerApi.ts
+++ b/src/frontend/app/data/PlannerApi.ts
@@ -31,6 +31,8 @@ export interface Itinerary {
 export interface Leg {
   mode?: string;
   feedId?: string;
+  routeId?: string;
+  tripId?: string;
   routeName?: string;
   routeShortName?: string;
   routeLongName?: string;