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>

docker/brouter/Dockerfile

@@ -20,13 +20,14 @@ RUN addgroup --system app && adduser --system --ingroup app app \
 RUN cp -r profiles2/* /data/profiles/ 2>/dev/null || true \
     && mv brouter-*-all.jar brouter.jar
 
-# Patch profiles to include maxspeed in WayTags output (for speed limit visualization)
+# Patch profiles to include extra tags in WayTags output for visualization
 # Each tag needs its own assign statement to appear in tiledesc WayTags
 RUN for f in /data/profiles/*.brf; do \
-      if grep -q "dummyUsage" "$f" && ! grep -q "maxspeed" "$f"; then \
-        sed -i '/assign dummyUsage/a assign dummyUsage2 = maxspeed=' "$f"; \
-      elif ! grep -q "maxspeed" "$f" && grep -q "context:node" "$f"; then \
-        sed -i '/---context:node/i assign dummyUsage2 = maxspeed=' "$f"; \
+      if grep -q "dummyUsage" "$f"; then \
+        grep -q "maxspeed" "$f" || sed -i '/assign dummyUsage/a assign dummyUsage2 = maxspeed=' "$f"; \
+        grep -q "tracktype" "$f" || sed -i '/assign dummyUsage/a assign dummyUsage3 = tracktype=' "$f"; \
+      elif grep -q "context:node" "$f"; then \
+        sed -i '/---context:node/i assign dummyUsage2 = maxspeed=\nassign dummyUsage3 = tracktype=' "$f"; \
       fi; \
     done