feat(bookings): show transport routes on map (#384, #587)

Adds from/to endpoints to flight/train/cruise/car reservations with
live map rendering. Flights use geodesic arcs and a curved duration +
distance badge; train/car/cruise render as straight or geodesic lines
with endpoint markers. Airports come from an embedded OurAirports
database (~3200 airports, offline-capable); train/cruise/car locations
via Nominatim. Per-trip connection toggle sits in the day plan
sidebar, persisted in localStorage. Clicking a map endpoint opens the
existing transport detail popup. New display setting toggles endpoint
labels on the map. Migration 105 adds the reservation_endpoints table
plus needs_review flag; existing flights are backfilled from their
IATA metadata on server startup.

client/src/types.ts

@@ -137,6 +137,20 @@ export interface BudgetMember {
   paid: boolean
 }
 
+export interface ReservationEndpoint {
+  id?: number
+  reservation_id?: number
+  role: 'from' | 'to' | 'stop'
+  sequence: number
+  name: string
+  code: string | null
+  lat: number
+  lng: number
+  timezone: string | null
+  local_time: string | null
+  local_date: string | null
+}
+
 export interface Reservation {
   id: number
   trip_id: number
@@ -158,6 +172,8 @@ export interface Reservation {
   accommodation_id?: number | null
   day_plan_position?: number | null
   metadata?: Record<string, string> | string | null
+  needs_review?: number
+  endpoints?: ReservationEndpoint[]
   created_at: string
 }