Update route-coloring spec with all 10 modes, create follow-up changes

Spec updates:
- route-coloring: Added speed limit, smoothness, track type, cycleway,
  and bike route modes. Added OSM wiki links, BRouter profile patching,
  dropdown order, bike route human-readable legends.

New follow-up changes (proposals only):
- elevation-map-interaction: Bidirectional chart ↔ map interaction
  (route hover → chart, chart click → pan, chart drag → zoom)
- e2e-test-reorganization: Mock BRouter by default, split tests by
  feature, shared helpers
- journal-poi-details: Surface POI metadata in Journal route detail
  (phone, address, website, opening hours from snapped waypoints)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

openspec/changes/elevation-map-interaction/.openspec.yaml

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+schema: spec-driven
+created: 2026-04-11

openspec/changes/elevation-map-interaction/proposal.md

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+## Why
+
+The elevation chart and map currently have one-directional interaction: hovering the chart shows a red dot on the map. But hovering the route on the map doesn't highlight the chart, clicking the chart doesn't pan the map, and there's no way to zoom into a section of the route from the chart. This makes it hard to correlate what you see on the map with what you see in the elevation profile.
+
+## What Changes
+
+- **Route hover → chart marker**: Hovering over the route polyline on the map shows the corresponding position on the elevation chart with a crosshair
+- **Chart click → map pan**: Clicking on the elevation chart pans the map to center on that point along the route
+- **Chart drag → map zoom**: Dragging/selecting a range on the elevation chart zooms the map to fit that section of the route
+
+## Capabilities
+
+### Modified Capabilities
+- `route-coloring`: Elevation chart gains bidirectional interaction with the map
+- `map-display`: Route polyline hover reports position back to the chart
+
+## Impact
+
+- `ElevationChart.tsx`: Add click handler (pan map), drag-select handler (zoom map), accept highlighted index from map hover
+- `PlannerMap.tsx` / `ColoredRoute.tsx`: Route polyline hover finds closest point and reports index/position back to SessionView
+- `SessionView.tsx`: Wire bidirectional state between chart and map