- Add settings content scroll refs and trigger scroll-to-top after successful sign-in and sign-up flows with regression coverage
- Keep task card merge timers live during active merges and add SSE support for task timing refresh
- Hoist Active Agents panel above the main list, add next-heartbeat visibility, and fix stale "Connecting..." card states
- Enforce unavailable-node scheduling guards and reset task steps when reopening tasks to triage or todo
Fusion-Task-Id: FN-2943