- Add ai-session-store unit tests for upsert/get round-trips, active filtering, stale recovery, cleanup, thinking debounce, and update/delete events
- Add persistence and resume-history integration tests for planning, subtask, and mission interview sessions across SQLite reload and cancellation flows
- Add reconnect and cross-tab lock tests covering SSE Last-Event-ID replay, keep-alive ping touches, optimistic lock conflicts, stale lock expiry, and lock release on tab close
- Expand useBackgroundSessions hook tests for SSE-driven updates/deletes, project-scoped fetch/stream behavior, counts, dismiss, and refresh state handling
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