1. 在项目根目录下，文件路径为【/src/settings/projectSetting.ts】，修改【setting】常量里面的【menuSetting.theme】为【ThemeEnum.LIGHT】，如下：

// 此处省略n行代码
// ! You need to clear the browser cache after the change
const setting: ProjectConfig = {
  // 此处省略n行代码
  // Menu configuration
  menuSetting: {
    // 此处省略n行代码
    // Menu theme
    theme: ThemeEnum.LIGHT,
    // 此处省略n行代码
  },
  // 此处省略n行代码
};

export default setting;

2. 在项目根目录下，文件路径为【/src/utils/index.ts】，添加【深拷贝】公共方法，如下：

//深克隆 可传入对象 或 数组
export function deepClone(obj: any) {
  if (obj === null || !obj) return obj;
  if (Object.prototype.toString.call(obj) === '[object Object]') {
    let target = {};
    const keys = Object.keys(obj);
    keys.forEach((key) => {
      if (obj[key] && typeof obj[key] === 'object') target[key] = deepClone(obj[key]);
      else target[key] = obj[key];
    });
    return target;
  } else if (Array.isArray(obj)) {
    let arr: any[] = [];
    obj.forEach((item, index) => {
      if (item && typeof item === 'object') arr[index] = deepClone(item);
      else arr[index] = item;
    });
    return arr;
  }
}

3. 在项目根目录下，文件路径为【/src/layouts/default/setting/components/SettingFooter.vue】，引入【更新主题背景色】方法，引入【深拷贝】公共方法，并在点击【重置】按钮后设置其方法，如下：

<template>
  <div :class="prefixCls">
    <a-button type="primary" block @click="handleCopy">
      <CopyOutlined class="mr-2" />
      {{ t('layout.setting.copyBtn') }}
    </a-button>

    <a-button color="warning" block @click="handleResetSetting" class="my-3">
      <RedoOutlined class="mr-2" />
      {{ t('common.resetText') }}
    </a-button>

    <a-button color="error" block @click="handleClearAndRedo">
      <RedoOutlined class="mr-2" />
      {{ t('layout.setting.clearBtn') }}
    </a-button>
  </div>
</template>
<script lang="ts">
  import { defineComponent, unref } from 'vue';

  import { CopyOutlined, RedoOutlined } from '@ant-design/icons-vue';

  import { useAppStore } from '/@/store/modules/app';
  import { usePermissionStore } from '/@/store/modules/permission';
  import { useMultipleTabStore } from '/@/store/modules/multipleTab';
  import { useUserStore } from '/@/store/modules/user';

  import { useDesign } from '/@/hooks/web/useDesign';
  import { useI18n } from '/@/hooks/web/useI18n';
  import { useMessage } from '/@/hooks/web/useMessage';
  import { useCopyToClipboard } from '/@/hooks/web/useCopyToClipboard';

  import { updateColorWeak } from '/@/logics/theme/updateColorWeak';
  import { updateGrayMode } from '/@/logics/theme/updateGrayMode';
  import { updateHeaderBgColor, updateSidebarBgColor } from '/@/logics/theme/updateBackground';
  import { updateDarkTheme } from '/@/logics/theme/dark';
  import { changeTheme } from '/@/logics/theme';
  import { deepClone } from '/@/utils';
  import projectSetting from '/@/settings/projectSetting';

  export default defineComponent({
    name: 'SettingFooter',
    components: { CopyOutlined, RedoOutlined },
    setup() {
      const defaultSetting = deepClone(projectSetting)
      const permissionStore = usePermissionStore();
      const { prefixCls } = useDesign('setting-footer');
      const { t } = useI18n();
      const { createSuccessModal, createMessage } = useMessage();
      const tabStore = useMultipleTabStore();
      const userStore = useUserStore();
      const appStore = useAppStore();

      function handleCopy() {
        const { isSuccessRef } = useCopyToClipboard(
          JSON.stringify(unref(appStore.getProjectConfig), null, 2),
        );
        unref(isSuccessRef) &&
          createSuccessModal({
            title: t('layout.setting.operatingTitle'),
            content: t('layout.setting.operatingContent'),
          });
      }
      function handleResetSetting() {
        try {
          const { colorWeak, grayMode, headerSetting, menuSetting, themeColor } = defaultSetting;
          appStore.setDarkMode(menuSetting.theme);
          appStore.setProjectConfig(defaultSetting);
          // updateTheme(themeColor);
          updateColorWeak(colorWeak);
          updateGrayMode(grayMode);
          updateDarkTheme(menuSetting.theme);
          updateHeaderBgColor(headerSetting.bgColor);
          updateSidebarBgColor(menuSetting.bgColor);
          changeTheme(themeColor);
          createMessage.success(t('layout.setting.resetSuccess'));
        } catch (error: any) {
          createMessage.error(error);
        }
      }

      function handleClearAndRedo() {
        localStorage.clear();
        appStore.resetAllState();
        permissionStore.resetState();
        tabStore.resetState();
        userStore.resetState();
        location.reload();
      }
      return {
        prefixCls,
        t,
        handleCopy,
        handleResetSetting,
        handleClearAndRedo,
      };
    },
  });
</script>
<style lang="less" scoped>
  @prefix-cls: ~'@{namespace}-setting-footer';

  .@{prefix-cls} {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
</style>