feat: add dark mode switch in sidebar

src/hooks/useDarkmode.ts

@@ -0,0 +1,17 @@
+import { useSettingStore } from "@/store";
+import { useEffect, useState } from "react";
+
+const useDarkMode = () => {
+  const settingStore = useSettingStore();
+  const [isDarkMode, setIsDarkMode] = useState(false);
+
+  useEffect(() => {
+    setTimeout(() => {
+      setIsDarkMode(document.documentElement.classList.contains("dark"));
+    });
+  }, [settingStore.setting.theme]);
+
+  return isDarkMode;
+};
+
+export default useDarkMode;