Implement the planner-multiplayer-awareness OpenSpec change:
- Add setUserName to use-yjs.ts that persists to localStorage and syncs via awareness
- Create ParticipantList component showing all session participants with color dots,
host badge, and inline name editing for the local user
- Replace plain text cursor labels with SVG pointer arrows and styled name tags
(colored background, drop shadow, rounded corners, z-index below map controls)
- Track awareness add/remove events and display auto-dismissing toasts (3s)
when participants join or leave the session
- Add i18n keys for participant UI in English and German
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Waypoint drag:
- Use observeDeep instead of observe to detect Y.Map property changes
Host election:
- Extracted to host-election.ts with 8 unit tests
- Simple rule: lowest real client ID is always host, deterministic
- Always sets role (host or participant), no missing roles
- Filters server docs (empty awareness state) from election
BRouter routing:
- Route segment-by-segment like bikerouter.de (one request per
waypoint pair), guarantees route passes through every waypoint
- Merge GeoJSON segments with accumulated stats
- 8 unit tests for segment merging and waypoint splitting
Awareness cleanup:
- Track client IDs per WebSocket connection
- Immediately remove awareness on WebSocket close
Debug panel:
- Visibility + expanded state persisted in localStorage
- Hotkey (Shift+Cmd+Option+T) toggles visibility
- Labels server docs as (server)
- All logic self-contained in YjsDebugPanel.tsx
User identity:
- Color and name persisted in localStorage across reloads
Tests: 32 total (16 existing + 8 host election + 8 routing)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Waypoint icons:
- Replace broken Leaflet default icons with numbered blue circles
- Numbers match sidebar order (1, 2, 3...)
Elevation chart:
- Mouse hover shows crosshair, elevation, and distance at cursor
- Red dot appears on the map at the corresponding route position
- Dot disappears when mouse leaves the chart
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
