Phase-2 i18n wiring for the last & hardest app (the live-POS Next.js App Router on a Cloudflare Worker).
Verified on demo.staging6/6 + staging smoke 5/5.
next-intl v4, without i18n routing. The locale is driven by a nix_cafe_lang cookie
(EN / ខ្មែរ), not a /[locale] URL segment — so the /cafe basePath, the auth middleware, and the
POS-lockdown middleware are all untouched. 1,926 strings across 97 files were converted to
t(...) calls; messages are generated from the flat localization export into nested
messages/{en,km}.json by a re-runnable script. The km bundle is English-until-translated —
every key resolves to English until Narong fills the Khmer column, then km.json regenerates with one command
(no code change). A language switcher sits in the authed top bar.
Because the Khmer column isn't filled yet, KM currently renders English (validated: all 1,926
keys resolve, zero key-path leaks). What's proven here is the plumbing: the switcher flips the locale, <html
lang> updates, and every authed surface renders cleanly in both locales.
Language switcher — EN active → ខ្មែរ active
EnglishTop-bar switcher: EN highlighted, <html lang="en">.ភាសាខ្មែរAfter clicking ខ្មែរ: cookie set, full reload, <html lang="km">, KM highlighted (text falls back to English until translated).
Authed surfaces render cleanly (no 5xx, no unresolved-key leaks)
