refactor(api)!: 平台 id 回退——joox/5sing/bili/apple 恢复全名，目录对齐 bd/mg

- 撤销 3381e9b/1b972ec 中 jx/5s/bl/ap 四个短码，恢复 joox/5sing/bili/apple；
  qian→bd、migu→mg 保留
- 目录与文件对齐保留的新 id：sdk/qian/→sdk/bd/、sdk/migu/→sdk/mg/、
  sdk/apis/qian.ts→bd.ts、migu.ts→mg.ts、src/http/migu-stream.ts→mg-stream.ts
  （规则改为「目录=对外 id」，聚合入口的模块变量同步更名；music.migu.cn 等域名、
  上游 music-lib 对照注释、miguGet 等功能标识符不动）
- 对外 id 全表：kw kg tx wy qs xm me qt lr mg bd joox 5sing bili apple

**破坏性变更**：joox/5sing/bili/apple 四平台的 URL、/sources 返回与
data/auth.json 凭据键恢复全名，已存短码键的登录态需重新登录。

验证：typecheck ✓、pnpm test 112/112 ✓

sdk/bili/index.ts

@@ -1,4 +1,4 @@
-// Bilibili（B站）平台模块 —— 上游 music-lib/bilibili 的移植（平台 id: bl）
+// Bilibili（B站）平台模块 —— 上游 music-lib/bilibili 的移植（平台 id: bili）
 // 能力：搜索 / 取流（DASH，VIP 可出 FLAC/Hi-Res）/ 歌单（合集 ugc_season + 多分P稿件）/
 //       链接解析（BV/av、分P）/ 封面 / 扫码登录（sdk/bili/login.ts，凭据落 sdk/auth/store.ts）
 // 不实现：专辑、歌词（上游即空实现）、榜单、热搜、歌手、评论、个人歌单、歌单分类（上游均未实现）。

sdk/bili/login.ts

@@ -5,7 +5,7 @@
 //       0 成功 / 86038 过期 / 86090 已扫码待确认 / 86101 未扫码
 // 成功时登录态 Cookie 在 poll 响应的 Set-Cookie 与 data.url 的 crossDomain 查询串里（两处都收集）。
 // 凭据落盘到 sdk/auth/store.ts 的 `bili` 记录（cookie / refreshToken / 账号资料），与 kg/wy 一致；
-// 上游 New(cookie) 的实例化语义由 getCredentials('bl') 承担（见 util.ts getCookie）。
+// 上游 New(cookie) 的实例化语义由 getCredentials('bili') 承担（见 util.ts getCookie）。
 // 状态码沿用本仓库约定：800 过期 / 801 等待扫码 / 802 已扫码待确认 / 803 登录成功。
 import QRCode from 'qrcode'
 import { httpFetch } from '../common/request.ts'
@@ -125,7 +125,7 @@ export const checkQRLogin = async(key: string) => {
     const cookie = cookieString(jar)
     if (!cookie) throw new Error('B站登录成功但未获取到 Cookie，请重试')
     const profile = await fetchProfile(cookie)
-    setCredentials('bl', {
+    setCredentials('bili', {
       cookie,
       refreshToken: String(data.refresh_token || ''),
       mid: profile.mid,
@@ -148,7 +148,7 @@ export const checkQRLogin = async(key: string) => {
 
 /** 当前登录态（凭据存在性 + 落盘时保存的账号资料） */
 export const status = () => {
-  const cred = getCredentials('bl') as any
+  const cred = getCredentials('bili') as any
   return cred?.cookie
     ? {
         logged: true,

sdk/bili/lyric.ts

@@ -1,6 +1,6 @@
 // Bilibili 歌词（上游 bilibili/lyric.go 即空实现：GetLyrics 对 bilibili 源恒返回空字符串）
 // B 站视频没有公开歌词接口（cc_subtitle 需登录且绝大多数视频没有），上游未实现，此处保持一致：
-// 返回统一结构 { lyric: '', tlyric: '' }，让 /lyric/bl 有响应而不是 404。
+// 返回统一结构 { lyric: '', tlyric: '' }，让 /lyric/bili 有响应而不是 404。
 export const getLyric = (_songInfo?: any, ..._rest: any[]) => {
   const requestObj = {
     promise: Promise.resolve({ lyric: '', tlyric: '' }),

sdk/bili/musicSearch.ts

@@ -50,7 +50,7 @@ export const search = async(keyword: string, page = 1, limit = 20) => {
     allPage: numPages || p + (list.length >= l ? 1 : 0),
     total,
     limit: l,
-    source: 'bl' as const,
+    source: 'bili' as const,
   }
 }
 

sdk/bili/playlist.ts

@@ -57,7 +57,7 @@ export const searchPlaylist = async(keyword: string, page = 1, limit = 20) => {
         creator: view?.owner?.name || item.author || '',
         description: season.intro || '',
         link: `https://www.bilibili.com/video/${item.bvid}`,
-        source: 'bl' as const,
+        source: 'bili' as const,
       }
     }
     const pages: any[] = view?.pages ?? []
@@ -73,14 +73,14 @@ export const searchPlaylist = async(keyword: string, page = 1, limit = 20) => {
         creator: view?.owner?.name || item.author || '',
         description: '',
         link: `https://www.bilibili.com/video/${item.bvid}`,
-        source: 'bl' as const,
+        source: 'bili' as const,
       }
     }
     return null
   })
 
   const list = result.filter(Boolean)
-  return { list, page: p, limit: l, total: list.length, source: 'bl' as const }
+  return { list, page: p, limit: l, total: list.length, source: 'bili' as const }
 }
 
 /** 由 bvid 构造歌单详情（上游 GetPlaylistSongs 的 bvid 分支 + ParsePlaylist 的元数据） */
@@ -167,7 +167,7 @@ const pageSlice = (detail: { info: any, songs: any[] }, page: any, limit: any) =
   const p = Math.max(1, Number(page) || 1)
   const l = Math.min(Math.max(1, Number(limit) || 100), 10000)
   return {
-    source: 'bl' as const,
+    source: 'bili' as const,
     info: detail.info,
     list: detail.songs.slice((p - 1) * l, p * l),
     page: p,
@@ -216,7 +216,7 @@ const parsePlaylistView = async(bvid: string, view: any) => {
     let trackCount = countSeasonEpisodes(season.sections)
     if (!trackCount) trackCount = detail.songs.length
     return {
-      source: 'bl' as const,
+      source: 'bili' as const,
       id,
       info: { ...detail.info, trackCount, playCount: Number(season?.stat?.view) || undefined },
       list: detail.songs,
@@ -227,7 +227,7 @@ const parsePlaylistView = async(bvid: string, view: any) => {
   }
   const detail = await detailFromBvid(bvid)
   return {
-    source: 'bl' as const,
+    source: 'bili' as const,
     id: bvidKey(bvid),
     info: { ...detail.info, trackCount: detail.songs.length },
     list: detail.songs,

sdk/bili/util.ts

@@ -25,7 +25,7 @@ export const biliHeaders = (cookie = ''): Record<string, string> => ({
 })
 
 /** 已保存的登录 Cookie（未登录返回空串） */
-export const getLoginCookie = (): string => String((getCredentials('bl') as any)?.cookie || '')
+export const getLoginCookie = (): string => String((getCredentials('bili') as any)?.cookie || '')
 
 const cookieMapFromHeaders = (headers: any): Record<string, string> => {
   const raw = headers?.['set-cookie']
@@ -147,7 +147,7 @@ export const makeSong = ({ bvid, cid, name, artist, album, duration, cover, page
     lrc: null,
     types: [] as any[],
     _types: {} as Record<string, any>,
-    source: 'bl' as const,
+    source: 'bili' as const,
     bvid,
     cid: String(cid ?? ''),
     page,