add codes

src/hooks/ColorMode.js

@@ -0,0 +1,22 @@
+import { useSetting, useSettingUpdate } from "./Setting";
+
+/**
+ * 深色模式hook
+ * @returns
+ */
+export function useDarkMode() {
+  const setting = useSetting();
+  return !!setting?.darkMode;
+}
+
+/**
+ * 切换深色模式
+ * @returns
+ */
+export function useDarkModeSwitch() {
+  const darkMode = useDarkMode();
+  const updateSetting = useSettingUpdate();
+  return async () => {
+    await updateSetting({ darkMode: !darkMode });
+  };
+}