message: fix font color in light mode app banner
diff: <script lang="ts" setup>
  -import AppButton from '../button/AppButton.vue';
  -import AppTheme from '../theme/AppTheme.vue';
  -import AppSpacer from '../spacer/AppSpacer.vue';
  -import { illMobileKikkerstein } from '../../app/img/ill/illustrations';
  -import AppThemeSvg from '../theme/svg/AppThemeSvg.vue';
  import { computed, ref } from 'vue';
  -import AppTranslate from '../translate/AppTranslate.vue';
  +import { useRoute } from 'vue-router';
  +import { illMobileKikkerstein } from '../../app/img/ill/illustrations';
  import { trackAppPromotionClick } from '../analytics/analytics.service';
  +import AppButton from '../button/AppButton.vue';
  import { Screen } from '../screen/screen-service';
  -import { useRoute } from 'vue-router';
  +import AppSpacer from '../spacer/AppSpacer.vue';
  import { useCommonStore } from '../store/common-store';
  +import AppTheme from '../theme/AppTheme.vue';
  +import AppThemeSvg from '../theme/svg/AppThemeSvg.vue';
  +import AppTranslate from '../translate/AppTranslate.vue';
  import { getAppUrl, useAppPromotionStore } from './store';
  const StorageKey = 'banner:app-promo';
  @@ -131,6 +131,7 @@ function close() {
  font-size: 19px
  max-width: 230px
  text-align: center
  + color: var(--theme-fg)
  .-ill
  position: absolute
  