Реал-тайм через SSE (push-to-invalidate): живые приглашения/партии, авто-обновление без перезагрузки

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/routers/invitations.py

@@ -8,7 +8,7 @@ from app.auth.deps import get_current_user
 from app.db.session import get_session
 from app.models import User
 from app.schemas import api as s
-from app.services import invitation_service
+from app.services import invitation_service, notify
 
 router = APIRouter(prefix="/invitations", tags=["invitations"])
 
@@ -27,7 +27,9 @@ def accept_invitation(
     session: Session = Depends(get_session),
     user: User = Depends(get_current_user),
 ) -> s.OkResponse:
-    invitation_service.accept(session, user, invitation_id)
+    group = invitation_service.accept(session, user, invitation_id)
+    notify.invitations_changed(user.id)  # type: ignore[arg-type]
+    notify.group_changed(session, group.id)  # type: ignore[arg-type]  # новый участник
     return s.OkResponse()
 
 
@@ -38,4 +40,5 @@ def decline_invitation(
     user: User = Depends(get_current_user),
 ) -> s.OkResponse:
     invitation_service.decline(session, user, invitation_id)
+    notify.invitations_changed(user.id)  # type: ignore[arg-type]
     return s.OkResponse()