add vocab quiz

docs/.vitepress/theme/components/TTS.vue

@@ -13,6 +13,10 @@
 import { useTemplateRef } from "vue";
 import { speak, getVoices } from "tauri-plugin-tts-api";
 
+defineExpose({
+  playAudio,
+});
+
 const { lang = "ko-KR" } = defineProps<{
   class?: string;
   lang?: string;