- BrainModule provides Brain instance to all gateway controllers
- ConversationsController: CRUD + message listing/creation
- ProjectsController: CRUD with owner assignment
- MissionsController: CRUD with project association
- TasksController: CRUD with project/mission/status filtering
- All routes guarded by AuthGuard (BetterAuth session validation)
- DTOs at module boundaries per project convention
Closes#14, Closes#15
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>