- Add batch status API types (BatchStatusRequest, BatchStatusResponse, etc.)
- Add batch GitHub client wrappers for efficient PR/issue status fetching
- Create useBatchBadgeFetch hook for coordinated dashboard fetching
- Update Board component to batch fetch badge statuses on mount
- Update TaskCard to merge batch, WebSocket, and task data with freshness comparison
- Add batch status REST endpoint at POST /api/tasks/batch/status
- Fix SSE hook cleanup to prevent memory leaks and stale connections
- Cap agent log memory and optimize batch log processing
- Memoize Board, Column, and TaskCard with custom comparator to reduce re-renders
- Stabilize column task arrays and preserve pagination across live updates
- Add TaskCardBadge component for PR/issue state display
- Remove deprecated GitHub polling code and archive functionality from core store
