feat(sdk): 新增咪咕/千千/JOOX/哔哩哔哩/5sing/Apple Music 六平台

平台注册表由 9 个扩到 15 个，同时补齐 sdk/types.ts 的类型与
OpenAPI 文档里的能力位声明。

- migu：命中 Z3D/I3D 加密候选时不返回直链，改由服务端解密代理出流，
  SDK 侧只负责登记票据，避免客户端拿到无法播放的密文
- apple：只提供 preview 试听片段（完整曲为 DRM），标 noAggregate
  排除在跨平台精确匹配之外，防止用它顶掉其它平台的可播结果
- 其余平台按既有 PlatformModule 约定实现搜索/专辑/歌单/歌词

为什么合并成一次提交：六平台共用同一份注册表与能力位声明，
拆开会产生互相引用、单独无法通过类型检查的中间态。

sdk/apple/album.ts

@@ -0,0 +1,77 @@
+// Apple Music 专辑（上游 apple.go 的 SearchAlbum / ParseAlbum / GetAlbumSongs）
+// 详情：amp-api /v1/catalog/<sf>/albums/<id>?extend=extendedAssetUrls
+//   → data[0].relationships.tracks.data[]（>300 首时分页，next 由 fetchAllTrackResources 跟进）
+// 链接：extractAppleID(link, 'album')，支持裸数字 id 与 /us/album/<slug>/<id> 链接。
+import {
+  appleAmpGet,
+  appleAlbumToPlaylist,
+  appleSongFromCatalog,
+  extractAppleID,
+  fetchAllTrackResources,
+  getAppleConfig,
+} from './util.ts'
+
+export { searchAlbum } from './musicSearch.ts'
+
+import { searchAlbum } from './musicSearch.ts'
+
+/** 专辑详情（page/limit 在完整曲目上切片，与其它平台 getAlbumDetail 契约一致） */
+export const getAlbumDetail = async(rawId: string, page = 1, limit = 50) => {
+  const albumId = extractAppleID(String(rawId ?? ''), 'album')
+  if (!albumId) throw new Error(`invalid apple music album id/link: ${rawId}`)
+
+  const cfg = getAppleConfig()
+  const body: any = await appleAmpGet(`/v1/catalog/${cfg.storefront}/albums/${albumId}`, { extend: 'extendedAssetUrls' })
+  const album = (body?.data ?? [])[0]
+  if (!album) throw new Error(`apple album not found: ${albumId}`)
+
+  const tracks = await fetchAllTrackResources(album?.relationships?.tracks)
+  const songs = tracks.map((track: any) => appleSongFromCatalog(track, albumId))
+
+  const p = Math.max(1, Number(page) || 1)
+  const l = Math.max(1, Number(limit) || 50)
+  const summary = appleAlbumToPlaylist(album)
+  // 上游 fetchPlaylistDetail 的做法：接口未给 trackCount 时以实际曲目数补齐
+  if (!summary.trackCount || songs.length > summary.trackCount) summary.trackCount = songs.length
+
+  return {
+    source: 'apple' as const,
+    info: {
+      id: albumId,
+      name: summary.name,
+      img: summary.cover,
+      desc: summary.description,
+      author: summary.creator,
+      link: summary.link,
+      trackCount: summary.trackCount,
+      releaseDate: summary.extra?.release_date || '',
+      recordLabel: summary.extra?.record_label || '',
+    },
+    list: songs.slice((p - 1) * l, (p - 1) * l + l),
+    page: p,
+    limit: l,
+    total: songs.length,
+  }
+}
+
+/** 上游 GetAlbumSongs：只返回曲目数组 */
+export const getAlbumSongs = async(id: string): Promise<any[]> => {
+  const { list } = await getAlbumDetail(id, 1, 100000)
+  return list
+}
+
+/** 上游 ParseAlbum：专辑链接 → 详情（曲目全量，不分页） */
+export const parseAlbumLink = async(link: string) => {
+  const detail = await getAlbumDetail(link, 1, 100000)
+  return {
+    source: 'apple' as const,
+    id: detail.info.id,
+    info: detail.info,
+    list: detail.list,
+    page: 1,
+    limit: Math.max(detail.total, 1),
+    total: detail.total,
+  }
+}
+
+export default { getAlbumDetail, getAlbumSongs, searchAlbum, parseAlbumLink }