add audio downloader

docs/.vitepress/theme/components/AudioButton.vue

@@ -27,7 +27,21 @@ async function playAudio() {
   });
   stopTTS();
 
-  audioEl.value.src = props.src;
+  const uploadURL = "https://www.howtostudykorean.com/wp-content/uploads";
+  let src = props.src;
+  if (src.startsWith(uploadURL)) {
+    src = src.replace(uploadURL, "/uploads/");
+    audioEl.value.onerror = () => {
+      if (!audioEl.value) return;
+      audioEl.value.src = props.src;
+      audioEl.value.currentTime = 0;
+      audioEl.value.play();
+    };
+  } else {
+    audioEl.value.onerror = null;
+  }
+
+  audioEl.value.src = src;
   audioEl.value.currentTime = 0;
   await audioEl.value.play();
 }