Wire anomaly detection backend into dashboard WebSocket feed as
typed 'anomaly_detected' and 'alert' messages. Add security mode
state to snapshot/delta broadcasts via SecurityStateProvider.
Include load shedding integration for crowd flow, detection event
logging, identity matching improvements, and sleep integration
updates. All acceptance criteria met: arm/disarm persists,
learning progress refreshes, alert banner <2s, acknowledge flow.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>