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>

e2e/fixtures/brouter-mock.ts

@@ -44,6 +44,22 @@ const MOCK_ROUTE_3WP = {
     "30", "30", "unknown", "unknown", "unknown",
     "unknown", "50", "50", "30", "30",
   ],
+  smoothnesses: [
+    "good", "good", "intermediate", "intermediate", "bad",
+    "bad", "good", "good", "excellent", "excellent",
+  ],
+  tracktypes: [
+    "unknown", "unknown", "unknown", "unknown", "grade3",
+    "grade3", "unknown", "unknown", "unknown", "unknown",
+  ],
+  cycleways: [
+    "lane", "lane", "track", "track", "unknown",
+    "unknown", "shared_lane", "shared_lane", "lane", "lane",
+  ],
+  bikeroutes: [
+    "rcn", "rcn", "lcn", "lcn", "none",
+    "none", "ncn", "ncn", "rcn", "rcn",
+  ],
 };
 
 /**
@@ -83,6 +99,18 @@ const MOCK_ROUTE_2WP = {
   maxspeeds: [
     "50", "50", "unknown", "unknown", "30", "30",
   ],
+  smoothnesses: [
+    "good", "good", "intermediate", "bad", "good", "good",
+  ],
+  tracktypes: [
+    "unknown", "unknown", "grade2", "grade4", "unknown", "unknown",
+  ],
+  cycleways: [
+    "lane", "lane", "track", "no", "shared_lane", "shared_lane",
+  ],
+  bikeroutes: [
+    "ncn", "ncn", "rcn", "none", "lcn", "lcn",
+  ],
 };
 
 /**