"use client" import { useEffect } from "react" /** Landing toujours en thème système, indépendamment des réglages Ultimail. */ export function LandingThemeApplier() { useEffect(() => { const media = window.matchMedia("(prefers-color-scheme: dark)") const apply = () => { document.documentElement.classList.toggle("dark", media.matches) } apply() media.addEventListener("change", apply) return () => media.removeEventListener("change", apply) }, []) return null }