.github/workflows/deploy-github-pages.yml runs `npm run build:gh` on push
to main and uploads build/ via actions/upload-pages-artifact@v3 +
actions/deploy-pages@v4.
The build:gh script sets BUILD_PROFILE=gh, which switches svelte.config.js
basePath to /loto so assets resolve under tiennm99.github.io/loto.
Cloudflare Pages keeps deploying in parallel via the CF dashboard
(npm run build, root basePath, loto.miti99.com). Two URLs, no conflict.