another step
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@@ -1,52 +0,0 @@
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import { COOKIE_NAMES } from '@/lib/cookies';
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/**
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* Inline synchronous script placed in <head> — runs before any paint.
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*
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* Two jobs:
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* 1. Set data-mui-color-scheme on <html> from our cookie, so the server-set
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* attribute and the first-paint attribute always agree (no flash).
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* 2. Patch Storage.prototype so MUI v9's internal localStorage reads for key
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* 'mode' return null (forcing MUI to use the defaultMode prop we derive
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* from the cookie on the server) and writes to 'mode' are routed to our
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* cookie instead of localStorage.
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*
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* Why patch Storage.prototype instead of storageWindow={null}?
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* In MUI v9 localStorageManager: `if (!storageWindow && typeof window !== 'undefined') {
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* storageWindow = window; }` — null is falsy, so storageWindow={null} is silently
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* overridden to window in the browser. The prototype patch is the only reliable way.
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*/
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export function ColorSchemeScript() {
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const cookieName = COOKIE_NAMES.COLOR_SCHEME; // 'color-scheme'
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const maxAge = 60 * 60 * 24 * 365;
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// MUI v9 default modeStorageKey (InitColorSchemeScript.mjs: DEFAULT_MODE_STORAGE_KEY = 'mode')
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const muiModeKey = 'mode';
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const script =
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`(function(){` +
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// ── 1. Set attribute from cookie before first paint ─────────────────────
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`var m=document.cookie.match(/(^|;)\\s*${cookieName}=([^;]*)/);` +
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`var s=m?decodeURIComponent(m[2]):(window.matchMedia('(prefers-color-scheme:dark)').matches?'dark':'light');` +
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`document.documentElement.setAttribute('data-mui-color-scheme',s==='dark'?'dark':'light');` +
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// ── 2. Intercept Storage so MUI never touches localStorage ───────────────
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`try{` +
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`var _s=Storage.prototype.setItem,_g=Storage.prototype.getItem,_r=Storage.prototype.removeItem;` +
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`Storage.prototype.setItem=function(k,v){` +
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`if(this===window.localStorage&&k==='${muiModeKey}'){` +
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`if(v==='dark'||v==='light')document.cookie='${cookieName}='+v+';path=/;max-age=${maxAge};samesite=lax';` +
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`else document.cookie='${cookieName}=;path=/;max-age=0';` +
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`return;}` +
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`_s.call(this,k,v);};` +
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`Storage.prototype.getItem=function(k){` +
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`if(this===window.localStorage&&k==='${muiModeKey}')return null;` +
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`return _g.call(this,k);};` +
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`Storage.prototype.removeItem=function(k){` +
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`if(this===window.localStorage&&k==='${muiModeKey}'){` +
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`document.cookie='${cookieName}=;path=/;max-age=0';return;}` +
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`_r.call(this,k);};` +
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`}catch(e){}` +
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`})();`;
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// eslint-disable-next-line react/no-danger
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return <script dangerouslySetInnerHTML={{ __html: script }} />;
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}
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@@ -3,7 +3,7 @@ import { LIGHT_THEME } from './light';
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import { DARK_THEME } from './dark';
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import APP_THEME, { APP_THEME_LTR, APP_THEME_RTL } from './theme';
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import { getDirection } from './direction';
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import { ColorSchemeScript } from './ColorSchemeScript';
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export {
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APP_THEME,
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@@ -14,5 +14,4 @@ export {
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LIGHT_THEME as default,
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AppThemeProvider as ThemeProvider,
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getDirection,
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ColorSchemeScript,
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};
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