feat(mcp): align MCP surface with current app state

- Add Journey addon tools (list, get, entries, contributors, suggestions,
  available trips, create/update/delete journey and entries, reorder,
  contributors CRUD, preferences, share link management)
- Add Journey resources (trek://journeys and sub-resources)
- Split transport (flight/train/car/cruise) into dedicated tools with
  endpoints[] and needs_review support; narrow reservation types to
  non-transport only
- Add airport lookup tools (search_airports, get_airport) under geo:read
- Add import_places_from_url and bulk_delete_places to places tools
- Add journey:read/write/share OAuth scopes (27 total) with translations
  across all 15 locales
- Default end_day to start_day when creating a transport (MCP + UI)
- Fix MCP.md drift: addon gates, removed files resource, corrected
  get_trip_summary description, todos under Packing addon

client/src/i18n/translations/id.ts

@@ -2235,6 +2235,7 @@ const id: Record<string, string | { name: string; category: string }[]> = {
   'oauth.scope.group.vacay': 'Liburan',
   'oauth.scope.group.geo': 'Geo',
   'oauth.scope.group.weather': 'Cuaca',
+  'oauth.scope.group.journey': 'Journey',
 
   // OAuth scope labels & descriptions
   'oauth.scope.trips:read.label': 'Lihat perjalanan & itinerari',
@@ -2285,6 +2286,12 @@ const id: Record<string, string | { name: string; category: string }[]> = {
   'oauth.scope.geo:read.description': 'Cari lokasi, selesaikan URL peta, dan geokode terbalik koordinat',
   'oauth.scope.weather:read.label': 'Prakiraan cuaca',
   'oauth.scope.weather:read.description': 'Ambil prakiraan cuaca untuk lokasi dan tanggal perjalanan',
+  'oauth.scope.journey:read.label': 'Lihat Journey',
+  'oauth.scope.journey:read.description': 'Baca Journey, entri, dan daftar kontributor',
+  'oauth.scope.journey:write.label': 'Kelola Journey',
+  'oauth.scope.journey:write.description': 'Buat, perbarui, dan hapus Journey beserta entrinya',
+  'oauth.scope.journey:share.label': 'Kelola tautan Journey',
+  'oauth.scope.journey:share.description': 'Buat, perbarui, dan cabut tautan berbagi publik untuk Journey',