Extract all Leaflet zIndexOffset values into z-index.ts constants:
POI markers (-1000) < cursors (-1000) < ghost waypoint (-100)
< waypoint markers (1000) < highlight dot (2000)
Replaced CircleMarker highlight with a Marker+DivIcon so it
participates in z-index ordering above waypoint markers.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The ghost marker (route split indicator) was interfering with waypoint
dragging because it sat above waypoints (zIndexOffset 1000) and stayed
active during drag operations.
Adopt brouter-web's suspension pattern:
- Suspend route interaction on waypoint mouseover (not just dragstart),
unsuspend on mouseout — ghost marker hides before any click/drag
- Lower ghost marker zIndexOffset to -100 so waypoints always receive
clicks first
- Keep drag guards as a safety net
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Enrich BRouter response with per-point 3D coordinates and segment boundary
tracking (EnrichedRoute interface)
- ColoredRoute component: plain, elevation gradient (green→yellow→red), and
surface color modes with invisible wide polyline for click targeting
- Click-to-split: click on route polyline inserts waypoint at nearest point,
mapped to correct segment via boundary indices
- MidpointHandles: draggable CircleMarkers at route segment midpoints for
reshaping, hidden below zoom 12, opaque on hover
- Color mode toggle (select) synced via Yjs routeData
- i18n keys for color mode labels (en + de)
- Unit tests for segment boundary tracking (13 tests)
- E2E tests for enriched route response and color mode toggle
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
