feat(agents): implement Code Commander module (Phases 1-5)

- Phase 1: Infrastructure (state, prompts, registry)
- Phase 2: Execution engine (AI adapters, security classifier, executors)
- Phase 3: Agent integration (graph nodes, routing)
- Phase 4: Streaming interaction (PTY terminal, WebSocket)
- Phase 5: Frontend integration (Vue components)

backend/app/main.py

@@ -28,6 +28,7 @@ from app.routers import (
     marketplace_router,
     agent_skills_router,
     agent_sessions_router,
+    terminal_router,
 )
 from app.routers.scheduler import router as scheduler_router
 from app.services.scheduler_service import start_scheduler, stop_scheduler, get_scheduler_status
@@ -127,6 +128,7 @@ app.include_router(plugins_router)
 app.include_router(marketplace_router)
 app.include_router(agent_skills_router)
 app.include_router(agent_sessions_router)
+app.include_router(terminal_router)
 
 
 @app.get("/api/health")