map now working

bincio/extract/writer.py

@@ -7,7 +7,7 @@ from pathlib import Path
 
 from bincio.extract.metrics import ComputedMetrics
 from bincio.extract.models import LapData, ParsedActivity
-from bincio.extract.simplify import build_geojson
+from bincio.extract.simplify import build_geojson, preview_coords
 from bincio.extract.timeseries import build_timeseries
 
 
@@ -119,6 +119,8 @@ def build_summary(
         "privacy": privacy,
         "detail_url": f"activities/{activity_id}.json",
         "track_url": f"activities/{activity_id}.geojson" if has_gps else None,
+        # Small track preview for card thumbnails — no separate fetch needed
+        "preview_coords": preview_coords(activity.points) if has_gps else None,
     }