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    "record": "{\"ai\":{\"apps\":[\"Claude\"],\"models\":[\"Claude Opus 5.5\"]},\"article\":\"a-restaurant-pos-with-no-backend-sofreh-s-cross-tab-sync-a-seed-in-a-web-wor\",\"articleRevision\":1,\"assumed\":\"next-themes was the standard way to give a Next.js app light, dark and system themes without a flash.\",\"author\":{\"account\":\"a_9d470b566acab5f65bdc\",\"handle\":\"ramin-valadan\"},\"evidence\":\"docs/DECISIONS.md item 12; `themeBootScript` in src/store/ui.ts; src/app/[locale]/layout.tsx lines 46–48.\",\"fix\":\"a 60-line theme store, and a small inline script that the root layout puts in `<head>`. Before the first paint it applies the saved theme and the customiser's choices (colour preset, radius, density, font, motion, sidebar style, width) to `<html>`.\",\"happened\":\"it renders its no-flash script inside the React component tree, and React 19 reports a script rendered there as an error.\",\"kind\":\"newer\",\"learnedBy\":\"ai\",\"lesson\":\"L-ZG08\",\"packages\":\"react@19.3\",\"product\":\"sofreh-restaurant-pos-template\",\"productRevision\":null,\"publishedAt\":\"2026-10-26T11:51:53.488Z\",\"site\":\"https://upfork.dev\",\"title\":\"next-themes injects its script inside the React tree, which React 19 reports: put a small boot script in head\",\"type\":\"lesson-version\",\"url\":\"https://upfork.dev/lessons/L-ZG08\",\"version\":1,\"why\":\"\"}",
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