feat(qs): 汽水音乐平台接入——匿名搜索/试听、抖音扫码登录、解密流代理

- sdk/qs 平台模块(安卓参数指纹匿名搜索)+ sdk/apis/qs 取流:
  匿名 30s 试听,登录态走签名 track_v2 + spade key AES-CTR 解密
- /login/qs/qr 抖音扫码登录(授权后 sessionid 解锁完整曲目)
- /stream/qs/:id 解密流代理,/url 返回的相对地址按请求 host 补全
- 回归测试覆盖 kw 双通道(VIP 真音频/降级链)与 qs 试听;start.bat 去掉
  SOURCE_ENABLED 直启

sdk/qs/lyric.ts

@@ -0,0 +1,46 @@
+// 汽水音乐歌词（逐字时间轴 → LRC/YRC）
+// 来源: seo_track 的 lyric.content，行格式 `[起(ms),长(ms)]<行内偏移(ms),长(ms),0>字...`
+// 与网易云 yrc 同族（wy/lyric.ts 的 parseTools 处理 (a,b,c) 括号变体，这里是尖括号）
+import musicInfo from './musicInfo.ts'
+
+const lineRe = /^\[(\d+),\d+\]/
+const wordRe = /<(\d+),(\d+),\d+>([^<]*)/g
+
+const msFormat = (timeMs: number) => {
+  if (Number.isNaN(timeMs)) return ''
+  let ms = timeMs % 1000
+  timeMs /= 1000
+  const m = parseInt(String(timeMs / 60)).toString().padStart(2, '0')
+  timeMs %= 60
+  const s = parseInt(String(timeMs)).toString().padStart(2, '0')
+  return `[${m}:${s}.${ms}]`
+}
+
+const parseTimedLyric = (content: string) => {
+  const lrcLines: string[] = []
+  const yrcLines: string[] = []
+  for (const rawLine of String(content || '').split('\n')) {
+    const line = rawLine.trim()
+    const lineMatch = lineRe.exec(line)
+    if (!lineMatch) continue
+    const timeTag = msFormat(parseInt(lineMatch[1]))
+    if (!timeTag) continue
+    const words = [...line.slice(lineMatch[0].length).matchAll(wordRe)]
+    if (!words.length) continue
+    const text = words.map(word => word[3]).join('')
+    if (!text.trim()) continue // 间奏空行
+    lrcLines.push(`${timeTag}${text}`)
+    yrcLines.push(`${timeTag}${words.map(word => `<${word[1]},${word[2]}>${word[3]}`).join('')}`)
+  }
+  return { lyric: lrcLines.join('\n'), yrc: yrcLines.join('\n') }
+}
+
+export default (trackId: string) => {
+  const requestObj = musicInfo(trackId)
+  requestObj.promise = requestObj.promise.then(body => {
+    const info = parseTimedLyric(body?.lyric?.content)
+    if (!info.lyric) return Promise.reject(new Error('获取歌词失败'))
+    return { lyric: info.lyric, tlyric: '', yrc: info.yrc }
+  }) as any
+  return requestObj
+}