Deployment troubleshooting

1. Open browser console (F12) and check the red error
2. Hard refresh: Ctrl + Shift + R (or Cmd + Shift + R on Mac)
3. Make sure your server serves .js files with MIME type application/javascript
4. Delete ALL old assets/index-*.js files on the server, upload only the latest from dist/assets/
5. If using CloudFlare/CDN, purge the cache
6. Verify .htaccess is uploaded to the same directory as index.html