refactor: 架构整固——分层单向化、全量 TypeScript、直接运行

- 移除 bd/mg 两平台及磁盘残留产物；清理 api-test 死脚本、musicSdk/message+options 死模块、infSign vendor
- musicSdk/ 改名 sdk/；src/common、src/auth、src/apis 整体移入 sdk/，依赖方向定为 src → sdk 严格单向
- src/ 手写 JS 全量转 .ts，删除 JS 类型垫片 modules.d.ts；源码 import 统一 .ts 后缀
- Node 原生类型剥离直接运行 .ts（engines >=22.18），取消 tsc 发射产物，tsc 仅类型检查（pnpm typecheck）
- 删除 kwdes 备用实现与 src/index.ts 转发垫片；测试移至 test/smoke-test.ts
- common/request.ts 补显式导出类型；修复 set-cookie 单值形态、ApiError 类字段等隐患

验证：tsc 零错误，smoke-test 41/41

sdk/kg/album.ts

@@ -0,0 +1,63 @@
+import { getMusicInfosByList } from './musicInfo.ts'
+import { createHttpFetch } from './util.ts'
+
+export default {
+  /**
+   * 通过AlbumId获取专辑信息
+   * @param {*} id
+   */
+  async getAlbumInfo(id) {
+    const albumInfoRequest = await createHttpFetch('http://kmrserviceretry.kugou.com/container/v1/album?dfid=1tT5He3kxrNC4D29ad1MMb6F&mid=22945702112173152889429073101964063697&userid=0&appid=1005&clientver=11589', {
+      method: 'POST',
+      body: {
+        appid: 1005,
+        clienttime: 1681833686,
+        clientver: 11589,
+        data: [{ album_id: id }],
+        fields: 'language,grade_count,intro,mix_intro,heat,category,sizable_cover,cover,album_name,type,quality,publish_company,grade,special_tag,author_name,publish_date,language_id,album_id,exclusive,is_publish,trans_param,authors,album_tag',
+        isBuy: 0,
+        key: 'e6f3306ff7e2afb494e89fbbda0becbf',
+        mid: '22945702112173152889429073101964063697',
+        show_album_tag: 0,
+      },
+    })
+    if (!albumInfoRequest) return Promise.reject(new Error('get album info failed.'))
+    const albumInfo = albumInfoRequest[0]
+
+    return {
+      name: albumInfo.album_name,
+      image: albumInfo.sizable_cover.replace('{size}', 240),
+      desc: albumInfo.intro,
+      authorName: albumInfo.author_name,
+      // play_count: this.formatPlayCount(info.count),
+    }
+  },
+  /**
+   * 通过AlbumId获取专辑
+   * @param {*} id
+   * @param {*} page
+   */
+  async getAlbumDetail(id, page = 1, limit = 200) {
+    const albumList = await createHttpFetch(`http://mobiles.kugou.com/api/v3/album/song?version=9108&albumid=${id}&plat=0&pagesize=${limit}&area_code=0&page=${page}&with_res_tag=0`)
+    if (!albumList.info) return Promise.reject(new Error('Get album list failed.'))
+
+    let result = await getMusicInfosByList(albumList.info)
+
+    const info = await this.getAlbumInfo(id)
+
+    return {
+      list: result || [],
+      page,
+      limit,
+      total: albumList.total,
+      source: 'kg',
+      info: {
+        name: info.name,
+        img: info.image,
+        desc: info.desc,
+        author: info.authorName,
+        // play_count: this.formatPlayCount(info.count),
+      },
+    }
+  },
+}