refactor(sdk): tipSearch 全删、歌词解码器归位、IPC 桥移除、api-source 层拆除

- 四平台 tipSearch 全部删除（永不做搜索联想），types 同步去掉 tipSearch 字段
- 歌词解码器归位：kg/krcDecode、tx/qrcDecode、kw/lyricDecode（原 common/ 下三处）
- rendererIpc/ipcNames IPC 桥删除，SDK 纯服务端化
- supportQuality 由各平台 apis 内联导出（sdk/index 汇总），kg/kw/tx/wy 改直连 apis/*，api-source 旧层移除

sdk/index.ts

@@ -2,7 +2,10 @@ import kw from './kw/index.ts'
 import kg from './kg/index.ts'
 import tx from './tx/index.ts'
 import wy from './wy/index.ts'
-import { supportQuality } from './api-source.ts'
+import { supportQualitys as kwQualitys } from './apis/kw.ts'
+import { supportQualitys as kgQualitys } from './apis/kg.ts'
+import { supportQualitys as txQualitys } from './apis/tx.ts'
+import { supportQualitys as wyQualitys } from './apis/wy.ts'
 import type { PlatformModule, SearchResult, SongInfo } from './types.ts'
 import {
   sizeFormate,
@@ -31,7 +34,14 @@ export const sources = SUPPORTED_SOURCES.map(({ id, name }) => ({ id, name }))
 export const init = (): Promise<unknown[]> =>
   Promise.all(SUPPORTED_SOURCES.map((s) => s.module.init?.()).filter(Boolean))
 
-export { supportQuality }
+// 各平台官方直连接口支持的音质（由取流接口的音质映射推导；
+// 外部音源模式下实际可用音质取决于 sources/ 脚本，另行运行时表现）
+export const supportQuality: Record<string, string[]> = {
+  kw: kwQualitys,
+  kg: kgQualitys,
+  tx: txQualitys,
+  wy: wyQualitys,
+}
 
 const trimStr = (str: unknown): string => (typeof str === 'string' ? str.trim() : str as string)