message: fix(ConfigProvider): dark mode not work as default value
diff: @@ -61,7 +61,8 @@ export default defineComponent({
  (newVal, oldVal) => {
  document.body.classList.remove(`van-theme-${oldVal}`);
  document.body.classList.add(`van-theme-${newVal}`);
  - }
  + },
  + { immediate: true }
  );
  }
  