fix(music-player): 修复歌词解析和显示问题

- 更新歌词解析正则，支持更广泛的歌词格式
- 修复歌词时间计算，精确到毫秒
-优化无歌词时的处理逻辑，显示每行文本
- 改进歌词滚动逻辑，确保正确显示当前行
- 增加对 currentTime 的监听，实时更新歌词显示

music-qianduan/src/components/MusicPlayer.vue

@@ -386,22 +386,29 @@ const parsedLyric = computed(() => {
   const lyric = currentMusic.value.lyric;
   const lines = lyric.split('\n');
   const result = [];
-  const timeRegExp = /\[(\d{2}):(\d{2})\.(\d+)\]/g;
+  const timeRegExp = /\[(\d{2}):(\d{2})\.(\d{2,3})\]/g;
 
   for (const line of lines) {
     const text = line.replace(timeRegExp, '').trim();
-    if (text) {
     timeRegExp.lastIndex = 0;
     let match;
     while ((match = timeRegExp.exec(line)) !== null) {
-        const min = parseInt(match, 10);
-        const sec = parseInt(match, 10);
-        const msStr = match;
-        const time = min * 60 + sec + parseFloat('0.' + msStr);
+      const min = parseInt(match[1], 10);
+      const sec = parseInt(match[2], 10);
+      const msPart = match[3];
+      const msStr = msPart.padEnd(3, '0');
+      const ms = parseInt(msStr, 10);
+      const time = min * 60 + sec + ms / 1000;
+      if (text) {
         result.push({ time, text });
       }
     }
   }
+
+  if (result.length === 0) {
+    return lines.map(line => ({ time: 0, text: line.trim() }));
+  }
+
   return result.sort((a, b) => a.time - b.time);
 })
 
@@ -523,18 +530,28 @@ const formatSliderTooltip = (val) => formatTime(val)
 // 监听 Pinia store 的时间更新
 watch(currentTime, (newVal) => {
   if (!isUserSeeking.value) {
-    sliderTime.value = newVal
+    sliderTime.value = newVal;
   }
   // 更新歌词
-  if (parsedLyric.value.length > 0) {
-    let newIndex = parsedLyric.value.findIndex(line => line.time > newVal) - 1
-    if (newIndex < 0) newIndex = parsedLyric.value.length - 1
+  if (parsedLyric.value && parsedLyric.value.length > 0) {
+    let newIndex = parsedLyric.value.findIndex(l => l.time > newVal);
+    
+    if (newIndex === -1) {
+      // We are at or after the last lyric line
+      newIndex = parsedLyric.value.length - 1;
+    } else {
+      // The active line is the one before the next line
+      newIndex = newIndex - 1;
+    }
+
     if (currentLyricIndex.value !== newIndex) {
-      currentLyricIndex.value = newIndex
-      if (isExpanded.value) scrollToActiveLyric()
+      currentLyricIndex.value = newIndex;
+      if (isExpanded.value && newIndex >= 0) {
+        scrollToActiveLyric();
       }
     }
-})
+  }
+});
 
 // 滚动到当前歌词
 const scrollToActiveLyric = async () => {
@@ -577,6 +594,34 @@ watch(() => currentMusic.value?.id, (newId) => {
     if (isExpanded.value) expandedActiveTab.value = 'lyric'
   }
 })
+
+// 监听当前播放时间，更新歌词
+watch(currentTime, (newTime) => {
+  if (!parsedLyric.value || parsedLyric.value.length === 0) return
+
+  let newIndex = -1
+  for (let i = 0; i < parsedLyric.value.length; i++) {
+    if (newTime >= parsedLyric.value[i].time) {
+      newIndex = i
+    } else {
+      break
+    }
+  }
+
+  if (newIndex !== currentLyricIndex.value) {
+    currentLyricIndex.value = newIndex
+    if (newIndex > -1 && lyricScrollbar.value && lyricLines.value[newIndex]) {
+      const lineEl = lyricLines.value[newIndex]
+      const scrollbarEl = lyricScrollbar.value.wrapRef
+      if (scrollbarEl) {
+        const offsetTop = lineEl.offsetTop
+        const scrollbarHeight = scrollbarEl.clientHeight
+        const targetScrollTop = offsetTop - scrollbarHeight / 2 + lineEl.clientHeight / 2
+        lyricScrollbar.value.setScrollTop(targetScrollTop)
+      }
+    }
+  }
+})
 </script>
 
 <style scoped>