exclude lift-assisted ski types from ascent totals

src/lib/activity-rules.ts

@@ -0,0 +1,8 @@
+// Lift-assisted downhill types: their recorded elevation gain comes from
+// lifts, so it doesn't count toward ascent totals. Touring variants
+// ("ski touring", "backcountry ski") earn their metres and do count.
+export const LIFT_ASSISTED_TYPES = ['ski', 'alpine ski', 'downhill ski', 'snowboard'];
+
+export function countsTowardAscent(type: string): boolean {
+	return !LIFT_ASSISTED_TYPES.includes(type.toLowerCase().trim());
+}