TrailMark 3.2.1 — Topographic rendering & 50k waypoint offline load
Resolves a long-standing memory regression when importing large GPX files. Topographic map rendering now uses a tiled vector pipeline that streams contour data per viewport — typical load dropped from 4.1 s to 680 ms on 3-year-old devices. Offline POI database rebuilt with 2026 OSM snapshot (12.4 M entries compressed to 187 MB).