Add smoothness, track type, cycleway, and bike route color modes
Four new route visualization modes extracted from BRouter WayTags:
- Smoothness: excellent (green) → impassable (dark red)
- Track Type: grade1 (green, best) → grade5 (red, worst)
- Cycleway: track/lane/shared_lane/no with direction awareness
- Bike Route: icn/ncn/rcn/lcn priority from route_bicycle_* tags
Each mode includes map polyline coloring, elevation chart coloring,
inline legend, hover label, i18n (EN+DE), and mock fixture data.
Dockerfile patched to also expose tracktype in BRouter WayTags
(smoothness, cycleway, and route_bicycle already present).
Dropdown order: plain, elevation, grade, surface, road type, speed
limit, smoothness, track type, cycleway, bike route.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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