Function apply

apps/app/src/hooks/use-theme.tsx:21–24

()

    if (theme === "system") {
      const mq = window.matchMedia("(prefers-color-scheme: dark)");
      const apply = () => {
        root.classList.remove("light", "dark");
        root.classList.add(mq.matches ? "dark" : "light");
      };
      apply();
      mq.addEventListener("change", apply);
      return () => mq.removeEventListener("change", apply);