Swap the factory's six tripService imports for the injected TripsService; delete services/tripService.ts and the collab/vacay bridges with it; prune the days/budget bridges to their surviving exports; update the migration docs and regenerate migration-graph.md.
Nest services inject RealtimeService (call-time delegation to the
websocket module, DatabaseService pattern) instead of importing
broadcast/broadcastToUser globals. Zero behavior change; test edits
are constructor-arg additions plus RealtimeModule in e2e harness
imports only.
jubnl