refactor(api)!: 平台 id 改两字母短码——qian→bd、joox→jx、5sing→5s、bili→bl

对外 id 统一为两字母短码，与既有的 kw/kg/tx/wy/qs/xm/me/qt/lr 对齐；
migu 与 apple 保持原样（Apple Music 没有自然的短码）。

**破坏性变更**：id 出现在所有 URL、/sources 返回、OpenAPI 示例以及
data/auth.json 的凭据键里，这四个平台已存的登录态会失效，需重新登录。

- sdk/index.ts：id 与 supportQuality 映射键
- sdk/types.ts：Source 联合类型
- src/routes.ts 与 routes-login.ts：路由路径与 schema 描述
  （/login/bili/qr → /login/bl/qr 等）、/login/status 的响应键
- test/smoke-test.ts、README.md、docs/API.md 同步

有意未改：sdk 目录与文件名仍用平台名（sdk/qian/、sdk/apis/joox.ts …），
规则定为「目录=平台名，id=对外短码」，映射只在 SUPPORTED_SOURCES 一处声明。
域名与正则（joox.com、5sing.kugou.com、/joox\.com\//）、jooxSign 等标识符、
错误文案里的中文平台名、以及 kg 榜单名（含「joox本地热歌榜」）全部保持原样——
它们只是恰好含平台名，并不是 id。

验证：typecheck ✓、pnpm test 112/112 ✓；另起临时实例实证 /sources 与
/login/status 的新 id 与展示名，新旧 id 均无残留。

sdk/qian/album.ts

@@ -29,7 +29,7 @@ const mapAlbumSummary = (item: QianAlbumSearchItem) => {
     genre: String(item?.genre ?? '').trim(),
     lang: String(item?.lang ?? '').trim(),
     link: id ? albumLink(id) : '',
-    source: 'qian' as const,
+    source: 'bd' as const,
   }
 }
 
@@ -74,7 +74,7 @@ export const searchAlbumItems = async(keyword: string, page = 1, limit = 10): Pr
 /** 搜索专辑（返回歌单/专辑统一摘要形状） */
 export const searchAlbum = async(keyword: string, page = 1, limit = 10) => {
   const word = String(keyword ?? '').trim()
-  const empty = { source: 'qian' as const, list: [] as any[], total: 0, page, limit }
+  const empty = { source: 'bd' as const, list: [] as any[], total: 0, page, limit }
   if (!word) return empty
 
   const items = await searchAlbumItems(word, page, limit)
@@ -82,7 +82,7 @@ export const searchAlbum = async(keyword: string, page = 1, limit = 10) => {
     .map(mapAlbumSummary)
     .filter((album) => album.id)
     .slice(0, limit)
-  return { source: 'qian' as const, list, total: items.length, page, limit }
+  return { source: 'bd' as const, list, total: items.length, page, limit }
 }
 
 /** 旧数字专辑 id → PSID（P 码）；已是 P 码则原样返回 */
@@ -146,7 +146,7 @@ export const getAlbumDetail = async(id: string, page = 1, limit = 30) => {
   }
 
   return {
-    source: 'qian' as const,
+    source: 'bd' as const,
     info: albumInfo,
     list: paged,
     page,

sdk/qian/index.ts

@@ -6,7 +6,7 @@
 //   - VIP/版权曲目 tracklink 无 path（需登录态会员 cookie），搜索保留但标记 payPlay；
 //   - 歌单关键词搜索（/v1/search?type=6）服务端已下线（errno 23001），searchPlaylist 返回空列表；
 //   - 上游 GetUserPlaylists 明确 Unsupported，本移植不提供 userPlaylist。
-// 凭据：上游 New(cookie) 的 cookie 从 sdk/auth/store.ts 的 getCredentials('qian') 读取（可选）。
+// 凭据：上游 New(cookie) 的 cookie 从 sdk/auth/store.ts 的 getCredentials('bd') 读取（可选）。
 import qianApi from '../apis/qian.ts'
 import musicSearch from './musicSearch.ts'
 import lyric from './lyric.ts'

sdk/qian/musicSearch.ts

@@ -6,7 +6,7 @@ import { APP_ID, apiGet, apiOk, mapTrack } from './util.ts'
 
 export const search = async(keyword: string, page = 1, limit = 20) => {
   const word = String(keyword ?? '').trim()
-  const empty = { list: [] as any[], allPage: 1, total: 0, limit, source: 'qian' as const }
+  const empty = { list: [] as any[], allPage: 1, total: 0, limit, source: 'bd' as const }
   if (!word) return empty
 
   const body = await apiGet('/v1/search', {
@@ -28,7 +28,7 @@ export const search = async(keyword: string, page = 1, limit = 20) => {
     allPage: haveMore ? page + 1 : Math.max(page, Math.ceil(total / Math.max(1, limit)) || 1),
     total,
     limit,
-    source: 'qian' as const,
+    source: 'bd' as const,
   }
 }
 

sdk/qian/parse.ts

@@ -26,7 +26,7 @@ export const parseSong = async(link: string) => {
   }
   delete song.lyricUrl
   delete song.raw
-  return { ...song, songmid: firstNonEmpty(song.songmid, tsid), source: 'qian' as const }
+  return { ...song, songmid: firstNonEmpty(song.songmid, tsid), source: 'bd' as const }
 }
 
 export const parseAlbum = async(link: string) => parseAlbumLink(link)

sdk/qian/playlist.ts

@@ -19,14 +19,14 @@ const mapPlaylistSummary = (item: any) => {
     creator: firstNonEmpty(item?.creator, item?.author, item?.userName, item?.nickName, item?.ownerName),
     description: rawDesc || tagList.join('、'),
     link: id ? playlistLink(id) : '',
-    source: 'qian' as const,
+    source: 'bd' as const,
   }
 }
 
 /** 上游 SearchPlaylist（type=6 歌单搜索；服务端已停用，返回空列表） */
 export const searchPlaylist = async(keyword: string, page = 1, limit = 10) => {
   const word = String(keyword ?? '').trim()
-  const empty = { source: 'qian' as const, list: [] as any[], total: 0, page, limit }
+  const empty = { source: 'bd' as const, list: [] as any[], total: 0, page, limit }
   if (!word) return empty
 
   const body = await apiGet('/v1/search', {
@@ -40,7 +40,7 @@ export const searchPlaylist = async(keyword: string, page = 1, limit = 10) => {
 
   const items = Array.isArray(body?.data?.typeSonglist) ? body.data.typeSonglist : []
   const list = items.map(mapPlaylistSummary).filter((item: any) => item.id)
-  return { source: 'qian' as const, list, total: Number(body?.data?.total) || list.length, page, limit }
+  return { source: 'bd' as const, list, total: Number(body?.data?.total) || list.length, page, limit }
 }
 
 /** 歌单详情（含曲目；tracklist/info 支持 pageNo/pageSize） */
@@ -69,7 +69,7 @@ export const getPlaylistDetail = async(id: string, page = 1, limit = 50) => {
   const total = Number(data?.trackCount) || list.length
 
   return {
-    source: 'qian' as const,
+    source: 'bd' as const,
     info: { id: playlistId, name: title, img: cover, desc: description, author: creator, link: playlistLink(playlistId) },
     list,
     page,
@@ -105,7 +105,7 @@ export const getCategories = async() => {
       list.push({ id, name, group: groupName, count: Number(item?.count ?? 0) || 0 })
     }
   }
-  return { source: 'qian' as const, list }
+  return { source: 'bd' as const, list }
 }
 
 /** 上游 GetCategoryPlaylists（page >= 1，limit 1..100） */
@@ -125,7 +125,7 @@ export const getCategoryPlaylists = async(categoryId: string | number, page = 1,
     .map((item: any) => ({ ...mapPlaylistSummary(item), categoryId: cateId }))
     .filter((item: any) => item.id)
   return {
-    source: 'qian' as const,
+    source: 'bd' as const,
     list,
     total: Number(body?.data?.total) || list.length,
     page: pageNo,

sdk/qian/util.ts

@@ -2,7 +2,7 @@
 // 上游 music-lib/qianqian 的全部接口都走 /v1/*，参数 = 业务参数 + appid + timestamp + sign：
 //   sign = md5(按 key 升序拼接 "k=v&..."（不含 sign）+ Secret)
 // 该平台匿名即可搜索 / 查专辑 / 查歌单 / 拿免费曲目直链；cookie 仅影响 VIP、收藏等登录态资源，
-// MusicServer 从 sdk/auth/store.ts 的 getCredentials('qian') 读取（可选，未登录留空）。
+// MusicServer 从 sdk/auth/store.ts 的 getCredentials('bd') 读取（可选，未登录留空）。
 import crypto from 'node:crypto'
 import { httpFetch } from '../request.ts'
 import { getCredentials } from '../auth/store.ts'
@@ -18,7 +18,7 @@ export const RATE_ORDER = ['3000', '320', '128', '64']
 
 /** 千千平台 cookie（未绑定返回空串；上游所有请求都会带上该 header，此处保持一致） */
 export const getQianCookie = (): string => {
-  const cred = getCredentials('qian') as { cookie?: string } | null
+  const cred = getCredentials('bd') as { cookie?: string } | null
   return cred?.cookie ? String(cred.cookie) : ''
 }
 
@@ -196,7 +196,7 @@ export const mapTrack = (item: any, opts: MapTrackOptions = {}) => {
     lrcx: '',
     types,
     _types,
-    source: 'qian' as const,
+    source: 'bd' as const,
   }
 }