feat(settings): show default font size

components/settings/SettingsFontSize.vue

@@ -1,4 +1,5 @@
 <script lang="ts" setup>
+import { DEFAULT_FONT_SIZE } from '~/constants'
 import type { FontSize } from '~/types'
 
 const sizes = ['xs', 'sm', 'md', 'lg', 'xl'] as FontSize[]
@@ -8,7 +9,7 @@ const fontSize = useFontSizeRef()
 <template>
   <select v-model="fontSize">
     <option v-for="size in sizes" :key="size" :value="size" :selected="fontSize === size">
-      {{ size }}
+      {{ `${size}${size === DEFAULT_FONT_SIZE ? $t('settings.interface.default') : ''}` }}
     </option>
   </select>
 </template>