local conversion

site/src/components/ActivityFeed.svelte

@@ -2,6 +2,7 @@
   import { onMount } from 'svelte';
   import type { ActivitySummary, BASIndex, Sport } from '../lib/types';
   import { formatDistance, formatDuration, formatElevation, formatDate, sportIcon, sportColor, sportLabel } from '../lib/format';
+  import { loadIndex } from '../lib/dataloader';
 
   /** Render preview_coords as an SVG polyline path string. */
   function trackPath(coords: [number, number][] | null, w: number, h: number): string {
@@ -53,9 +54,7 @@
     sport = (new URLSearchParams(window.location.search).get('sport') as Sport | 'all') ?? 'all';
     mounted = true;
     try {
-      const res = await fetch(`${import.meta.env.BASE_URL}data/index.json`);
-      if (!res.ok) throw new Error(`HTTP ${res.status}`);
-      const index: BASIndex = await res.json();
+      const index = await loadIndex(import.meta.env.BASE_URL);
       all = index.activities.filter(a => a.privacy !== 'private');
     } catch (e: any) {
       error = e.message;