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trails/openspec/changes/archive/2026-03-26-planner-route-interactions/specs/map-display/spec.md
Ullrich Schäfer ba044610b7
Add route interactions: click-to-split, drag-to-reshape, colored route rendering 
- 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>
2026-03-26 22:36:42 +01:00

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MODIFIED Requirements

Requirement: Route visualization

The map SHALL display the computed route as an interactive, optionally color-coded polyline on the map.

Scenario: Display route

  • WHEN BRouter returns a route GeoJSON
  • THEN the route is rendered as a polyline on the map, colored according to the active color mode

Scenario: Route updates on waypoint change

  • WHEN a waypoint is added, moved, or deleted
  • THEN the route polyline updates after BRouter recomputes the route

Scenario: Ghost marker on hover

  • WHEN the cursor is within 15 pixels of the route polyline
  • THEN a transient ghost marker appears at the nearest route point, which can be clicked or dragged to insert a waypoint (see route-splitting and route-drag-reshape specs)