Full navigation UI with:
- Search bar with 150ms debounced autocomplete from /api/geocode
- Keyboard navigation (arrow keys, Enter, Escape)
- Exact match badge for verified address results
- Multi-stop list with drag-to-reorder (dnd-kit)
- 10-stop cap with disabled state
- Mode selector (drive/walk/bike)
- Valhalla route display with per-leg color polyline
- Maneuver list with instructions, distance, time remaining
- Click maneuver to fly map to that point
- Optimize stops button (3+ stops, uses /optimized_route)
- Responsive: side panel (desktop ≥768px), bottom sheet (mobile)
- Stop pins: green origin, red destination, blue intermediate
- Pin popup with remove button
- Geolocation permission requested on first route, not on load
- Error handling for unroutable pairs
- nginx proxy for /api/ and /valhalla/ endpoints
Dependencies added: zustand, @dnd-kit/core, @dnd-kit/sortable,
@dnd-kit/utilities
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
