修复讲解语音切换后播放器未刷新

- 暂停时切换语言或男女声同步刷新音轨、时长和进度
- 保持暂停状态，播放中继续自动切换新音轨
- 补充语音切换播放器刷新回归测试

Made-with: Proma

src/composables/useGlobalAudioPlayer.ts

@@ -205,6 +205,31 @@ const toSwitchedAudioItem = (
   supportedLanguages: currentAudio.value?.supportedLanguages
 })
 
+const prepare = (audio: AudioItem, options: GlobalAudioPlayOptions = {}) => {
+  const preservedMode = options.displayMode || displayMode.value
+  stopAudioElement()
+  currentAudio.value = audio
+  currentSource.value = options.source || currentSource.value
+  retryOnError = options.retryOnError || retryOnError
+  visible.value = true
+  displayMode.value = preservedMode
+  playing.value = false
+  loading.value = false
+  error.value = audio.audioUrl ? '' : '当前语言暂无语音讲解'
+  currentTime.value = 0
+  duration.value = audio.duration || 0
+
+  if (audio.audioUrl) {
+    const element = ensureAudioElement()
+    if (element) {
+      element.src = audio.audioUrl
+      element.load()
+      element.playbackRate = playbackRate.value
+      element.muted = muted.value
+    }
+  }
+}
+
 const play = async (audio: AudioItem, options: GlobalAudioPlayOptions = {}) => {
   if (!audio.audioUrl) {
     const preservedMode = options.displayMode || displayMode.value
@@ -500,6 +525,7 @@ export const useGlobalAudioPlayer = () => ({
   closeVersion,
   hasAudio: computed(() => Boolean(currentAudio.value)),
   play,
+  prepare,
   pause,
   resume,
   stop,