fix: theme

app/layout.tsx

@@ -16,7 +16,7 @@ export const metadata: Metadata = {
 
 // Runs before paint to set the `.dark` class from saved preference / system,
 // avoiding a light flash on load. Kept inline + minimal on purpose.
-const noFlashTheme = `(function(){try{var t=localStorage.getItem('aram_theme');if(!t){t=window.matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light';}if(t==='dark'){document.documentElement.classList.add('dark');}}catch(e){}})();`;
+const noFlashTheme = `(function(){try{var t=localStorage.getItem('aram_theme');if(t==='dark'||(t!=='light'&&(t='system',window.matchMedia('(prefers-color-scheme: dark)').matches))){document.documentElement.classList.add('dark');}}catch(e){}})();`;
 
 export default function RootLayout({
   children,