Function handler

desktop/src/shared/theme/ThemeProvider.tsx:324–326

(event: MediaQueryListEvent)

    const mq = window.matchMedia("(prefers-color-scheme: dark)");
    const handler = (event: MediaQueryListEvent) => {
      setSystemIsDark(event.matches);
    };

    setSystemIsDark(mq.matches);
    mq.addEventListener("change", handler);