- ConversationView: an ended session (SessionDetail, SessionReplay pass
`ended`) polls its transcript every 60 s instead of 3 s and stops
rescanning sub-agents; new_event, reconnect and show still fetch at once.
- Workspace: GET /api/run follows run-moving WS messages (lane run
columns, session created/status change, runs_interrupted) with a 30 s
fallback, instead of a blind 5 s poll.
- StatusBar: session counts re-read only when a session's
status/waiting/archived state changes (60 s fallback); costs re-read at
most every 30 s while work is happening and every 2 min otherwise.
- Dashboard recent activity: 60 s safety poll (was 10 s) plus remote
import messages; WS still prepends new events.
- New lib/sessionChange.ts matcher with tests.
