Adds a responsive Home screen combining the notification list with a
device summary panel and ARP scanner status, visible side-by-side on
wide screens and stacked on narrow ones.
Backend:
- New GET /api/devices/summary endpoint returning registered device
counts and "seen in last 24h / 7 days" breakdowns by registration
status
- Migration 07 adds indexes on (is_registered) and (last_seen,
is_registered) so summary queries use index range scans instead of
full table scans
Frontend:
- HomeScreen replaces NotificationList, embedding notifications,
device summary card, and ArpScannerCard in a LayoutBuilder-driven
two-column (≥700 px) or single-column layout
- ArpScannerCard extracted to a shared public widget reused by both
HomeScreen and StatusScreen
- Nav rail entry renamed to "Home" with home icon
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
