records: exclude indoor/treadmill/virtual sub_sport; rebuild athlete.json on bake

- fit.py: map FIT sub_sport 'treadmill' and 'virtual' to 'indoor'
- writer.py: broaden _is_outdoor to catch all indoor sub_sport variants
- render/cli.py: rebuild athlete.json from index.json on every bake so
  records never go stale when the exclusion logic changes

bincio/render/cli.py

@@ -105,6 +105,35 @@ def _bake_tracks(data: Path, handle: str | None = None) -> None:
             console.print(f"  [yellow]{user_dir.name}[/yellow]: bake_tracks failed: {exc}")
 
 
+def _rebuild_athlete_json(data: Path, handle: str | None = None) -> None:
+    """Rebuild athlete.json for one user or all users from their current index.json."""
+    import json
+    from bincio.extract.writer import write_athlete_json
+
+    targets = [data / handle] if handle else _user_dirs(data)
+    _COMPUTED = {"bas_version", "generated_at", "power_curve", "records", "best_climbs"}
+    for user_dir in targets:
+        index_path = user_dir / "index.json"
+        if not index_path.exists():
+            continue
+        try:
+            index_data = json.loads(index_path.read_text(encoding="utf-8"))
+            summaries = index_data.get("activities", [])
+            if not summaries:
+                continue
+            athlete_config: dict = {}
+            athlete_path = user_dir / "athlete.json"
+            if athlete_path.exists():
+                try:
+                    existing = json.loads(athlete_path.read_text(encoding="utf-8"))
+                    athlete_config = {k: v for k, v in existing.items() if k not in _COMPUTED}
+                except Exception:
+                    pass
+            write_athlete_json(summaries, user_dir, athlete_config)
+        except Exception as exc:
+            console.print(f"  [yellow]{user_dir.name}[/yellow]: rebuild_athlete failed: {exc}")
+
+
 def _write_root_manifest(data: Path) -> None:
     """Rewrite the root index.json shard manifest from current user dirs."""
     import json
@@ -207,6 +236,7 @@ def render(
     console.print(f"Data:  [cyan]{data}[/cyan]")
 
     _merge_edits(data, handle=handle)
+    _rebuild_athlete_json(data, handle=handle)
     _bake_tracks(data, handle=handle)
     _write_root_manifest(data)