Improve zoomed-in detail: finer routes, more stations, roads always on
- Route data re-fetched at 0.0005° tolerance (~50m) — 29k points,
lines stay continuous even at tight zoom
- State boundaries re-simplified at 0.002° for more detail
- Station zoom thresholds made more aggressive: level 5 at 30° width
(was 20°), level 6 at 15° (was 10°)
- Roads visible at all zoom levels (removed 30° gate)
- Minimum zoom limit: viewport can't go below 3.5° width (~250 miles)
to prevent zooming into emptiness
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>