fix: increase default zoom level in new tracks example for large files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: naomiaro

website/src/components/examples/NewTracksExample.tsx

@@ -224,7 +224,8 @@ export function NewTracksExample() {
       {tracks.length > 0 && (
         <WaveformPlaylistProvider
           tracks={tracks}
-          samplesPerPixel={2048}
+          samplesPerPixel={8192}
+          zoomLevels={[512, 1024, 2048, 4096, 8192, 16384, 32768]}
           mono
           waveHeight={120}
           automaticScroll={true}