feat(roadtrip): add daily scheduling and configurable day endings

client/src/api/assignmentEndDay.ts

@@ -0,0 +1,7 @@
+import { assignmentSchema, type AssignmentEndDayRequest } from '@trek/shared'
+import { apiClient } from './client'
+
+export async function saveAssignmentEndDay(tripId: number | string, id: number, body: AssignmentEndDayRequest) {
+  const saved = await apiClient.put(`/trips/${tripId}/assignments/${id}/end-day`, body)
+  return assignmentSchema.parse(saved.data.assignment)
+}