Adds Vercel Web Analytics to measure traffic on the live demo.
Since this is a privacy-focused, self-hostable tool, analytics is disabled by default — the <Analytics /> script loads only when ENABLE_ANALYTICS=true is set, so forks and self-hosted deployments ship no tracking script unless they explicitly enable it.
No traffic data is ever sent to the maintainers.
N/A
ENABLE_ANALYTICS: run npm run build && npm run start, open the app, and confirm no /_vercel/insights script/request appears in the browser Network tab.ENABLE_ANALYTICS=true: restart and confirm the /_vercel/insights/script.js request now loads.feat:, fix:, chore:, refactor:, docs:, i18n:)locales/ko.json and locales/en.json (if UI text changed)