feat(maps): Coordinate Converter + new Maps category - #94
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First of the maps suite. Fully client-side (no tiles/network): convert a GPS coordinate between Decimal (DD), DMS, UTM (WGS84) and geohash, plus an OpenStreetMap link and 'use my location' (geolocation). - coord.lib (pure, tested): parseLatLng, ddToDms/dmsToDd, ddToUtm/utmToDd (USGS series), encode/decodeGeohash, formatDd. Round-trip tests across hemispheres + zones. - New 'Maps' category (emerald). Coordinate Converter island with a format picker + per-format outputs with copy buttons. 575 tests · lint clean · build green (/tools/coord-convert built). Map-based tools (Map Explorer, GeoJSON/GPX/KML viewer, Static map — MapLibre + OpenFreeMap, with dark-theme sync) come next. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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First of the maps suite. Fully client-side (no tiles/network): convert a GPS coordinate between Decimal (DD), DMS, UTM (WGS84), and geohash, plus an OpenStreetMap link and 'use my location'.
coord.lib(pure, tested): DD/DMS, UTM (USGS series), geohash — round-trip tests across hemispheres + zones.575 tests · lint clean · build green. Map-based tools (Map Explorer, GeoJSON/GPX/KML viewer, Static map — MapLibre + OpenFreeMap, with dark-theme sync) come next.
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