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

server/src/mcp/tools.ts

@@ -1,6 +1,7 @@
 import { McpServer } from '@modelcontextprotocol/sdk/server/mcp';
 import { registerTodoTools } from './tools/todos';
 import { registerAssignmentTools } from './tools/assignments';
+import { registerJourneyTools } from './tools/journey';
 import { registerReservationTools } from './tools/reservations';
 import { registerTagTools } from './tools/tags';
 import { registerMapsWeatherTools } from './tools/mapsWeather';
@@ -12,6 +13,7 @@ import { registerBudgetTools } from './tools/budget';
 import { registerPackingTools } from './tools/packing';
 import { registerCollabTools } from './tools/collab';
 import { registerTripTools } from './tools/trips';
+import { registerTransportTools } from './tools/transports';
 import { registerVacayTools } from './tools/vacay';
 import { registerMcpPrompts } from './tools/prompts';
 
@@ -40,6 +42,10 @@ export function registerTools(server: McpServer, userId: number, scopes: string[
 
   registerCollabTools(server, userId, scopes);
 
+  registerTransportTools(server, userId, scopes);
+
+  registerJourneyTools(server, userId, scopes);
+
   registerVacayTools(server, userId, scopes);
 
   registerTodoTools(server, userId, scopes);