refactor(sdk): 审计 P2 卫生项清理——请求层收敛与死代码清除

- 删除旧 sdk/request.ts，全部 import 收敛到 sdk/common/request.ts（85 文件）
- 注释死代码 630+ 行、裸 console.log 吞错 6 处、未使用符号 26 处清零
- bili 状态校验去重；utils DNS 预解析失败日志改 warn 带上下文
- CODE-AUDIT.md：第四节 P2 清理记录 + 第八节线索逐条复核结论（kw/kg/tx/wy parse 骨架相似实质各异，不抽公共层）

sdk/kw/util.ts

@@ -1,33 +1,7 @@
-// import { httpGet, httpFetch } from '../request.ts'
 import { handleKwDecodeLyric } from './lyricDecode.ts'
 import { createCipheriv, createDecipheriv } from 'crypto'
 import { toMD5 } from '../utils.ts'
 
-// const kw_token = {
-//   token: null,
-//   isGetingToken: false,
-// }
-
-// const translationMap = {
-//   "{'": '{"',
-//   "'}\n": '"}',
-//   "'}": '"}',
-//   "':'": '":"',
-//   "','": '","',
-//   "':{'": '":{"',
-//   "':['": '":["',
-//   "'}],'": '"}],"',
-//   "':[{'": '":[{"',
-//   "'},'": '"},"',
-//   "'},{'": '"},{"',
-//   "':[],'": '":[],"',
-//   "':{},'": '":{},"',
-//   "'}]}": '"}]}',
-// }
-
-// export const objStr2JSON = str => {
-//   return JSON.parse(str.replace(/(^{'|'}\n$|'}$|':'|','|':\[{'|'}\],'|':{'|'},'|'},{'|':\['|':\[\],'|':{},'|'}]})/g, s => translationMap[s]))
-// }
 
 export const objStr2JSON = (str: string): any => {
   return JSON.parse(str.replace(/('(?=(,\s*')))|('(?=:))|((?<=([:,]\s*))')|((?<={)')|('(?=}))/g, '"'))
@@ -44,46 +18,9 @@ export const matchToken = (headers: Record<string, any>): string | null => {
   }
 }
 
-// const wait = time => new Promise(resolve => setTimeout(() => resolve(), time))
-
-
-// export const getToken = (retryNum = 0) => new Promise((resolve, reject) => {
-//   if (retryNum > 2) return Promise.reject(new Error('try max num'))
-
-//   if (kw_token.isGetingToken) return wait(1000).then(() => getToken(retryNum).then(token => resolve(token)))
-//   if (kw_token.token) return resolve(kw_token.token)
-//   kw_token.isGetingToken = true
-//   httpGet('http://www.kuwo.cn/', (err, resp) => {
-//     kw_token.isGetingToken = false
-//     if (err) return getToken(++retryNum)
-//     if (resp.statusCode != 200) return reject(new Error('获取失败'))
-//     const token = kw_token.token = matchToken(resp.headers)
-//     resolve(token)
-//   })
-// })
 
 export const decodeLyric = handleKwDecodeLyric
 
-// export const tokenRequest = async(url, options = {}) => {
-//   let token = kw_token.token
-//   if (!token) token = await getToken()
-//   if (!options.headers) {
-//     options.headers = {
-//       Referer: 'http://www.kuwo.cn/',
-//       csrf: token,
-//       cookie: 'kw_token=' + token,
-//     }
-//   }
-//   const requestObj = httpFetch(url, options)
-//   requestObj.promise = requestObj.promise.then(resp => {
-//     // console.log(resp)
-//     if (resp.statusCode == 200) {
-//       kw_token.token = matchToken(resp.headers)
-//     }
-//     return resp
-//   })
-//   return requestObj
-// }
 
 interface LrcWordInfo {
   startTime: number
@@ -117,7 +54,6 @@ export const lrcTools = {
         }
 
         prevWord.newTimeStr = `<${prevWord.startTime},${prevWord.endTime - prevWord.startTime}>`
-        // console.log(prevWord)
       }
     }
     return {
@@ -137,7 +73,6 @@ export const lrcTools = {
       }
       const wordTimes = words.match(this.rxps.wordTimeAll)
       if (!wordTimes) return
-      // console.log(wordTimes)
       let preTimeInfo
       for (const timeStr of wordTimes) {
         const result = this.rxps.wordTime.exec(timeStr)
@@ -167,7 +102,6 @@ export const lrcTools = {
     }
   },
   parse(lrc: string): string {
-    // console.log(lrc)
     const lines = lrc.split(/\r\n|\r|\n/)
     const tools = Object.create(this)
     tools.isOK = true
@@ -183,7 +117,6 @@ export const lrcTools = {
     if (!tools.lines.length) return ''
     let lrcs = tools.lines.join('\n')
     if (tools.tags.length) lrcs = `${tools.tags.join('\n')}\n${lrcs}`
-    // console.log(lrcs)
     return lrcs
   },
 }