- Rename core loader, dashboard server chat/planning routes, and frontend agent IDs/storage keys from kb-agent to fn-agent naming
- Update dashboard hooks and components (agent list, chat view, quick chat) to use the new fn agent key prefixes consistently
- Refresh engine, dashboard, core, and CLI tests/mocks to remove remaining kb-agent route and temp prefix references
- Update storage/gap-analysis docs to reflect fn agent key names and add a @gsxdsm/fusion patch changeset for the rename
- Rename engine export and call sites to use createFnAgent consistently across runtime flows
- Update core lazy engine loader and dashboard agent-generation/planning/chat paths to reference createFnAgent
- Refresh affected unit and integration tests, including renaming pi-create-kb-agent.test.ts to pi-create-fn-agent.test.ts
- Update AGENTS.md documentation references to match the new createFnAgent name
- 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
