feat(python): 完成 Python 全量迁移——剩余平台、登录通道与公共层修复

- 新增 5sing/apple/xm/me/qt/lr 平台包与取流实现（含 xm-sign、MissEvan 签名、蜻蜓 HMAC、Apple developer token）
- 新增 wy/kg/tx/lr 登录：扫码、手机号、账密（kg 20028 风控指纹）、cookie 绑定、kg/tx 续期
- request 层：保留多值 Set-Cookie；JSON body 紧凑化（修复 kg 网关验签）；直连不经系统代理（对齐 Node）
- 登录路由统一 Body(embed=True)，修复扫码轮询 422；lifespan 接入登录续期调度
- ruff/format/pyright 全绿；14 平台真实联网与 HTTP 路由验证通过

app/sdk/platforms/tx/music_info.py

@@ -0,0 +1,108 @@
+"""QQ音乐歌曲信息（移植自 sdk/tx/musicInfo.ts）。
+
+走 musicu.fcg 的 music.pf_song_detail_svr/get_song_detail_yqq：songmid → track_info。
+歌词与评论模块靠它把 songmid 换成数字 songID（接口只认数字 id）。
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from app.sdk.common.request import http_fetch
+from app.sdk.common.utils import format_play_time, size_formate
+from app.sdk.platforms.tx.utils import MUSICU_URL, UA_MUSICU
+
+
+def _build_types(file: dict[str, Any]) -> tuple[list[dict[str, Any]], dict[str, dict[str, Any]]]:
+    """file.size_* → types/_types（0 表示该档不存在，与原文一致）。"""
+    types: list[dict[str, Any]] = []
+    _types: dict[str, dict[str, Any]] = {}
+    for key, quality in (
+        ("size_128mp3", "128k"),
+        ("size_320mp3", "320k"),
+        ("size_flac", "flac"),
+        ("size_hires", "flac24bit"),
+    ):
+        if file.get(key):
+            size = size_formate(file[key])
+            types.append({"type": quality, "size": size})
+            _types[quality] = {"size": size}
+    return types, _types
+
+
+def _song_img(album_id: Any, singers: Any) -> str:
+    if album_id in ("", "空", None):
+        if isinstance(singers, list) and singers and singers[0].get("mid"):
+            return f"https://y.gtimg.cn/music/photo_new/T001R500x500M000{singers[0]['mid']}.jpg"
+        return ""
+    return f"https://y.gtimg.cn/music/photo_new/T002R500x500M000{album_id}.jpg"
+
+
+async def get_music_info_by_mid(songmid: str) -> dict[str, Any] | None:
+    """songmid → SongInfo；无 media_mid 时返回 None（原文同样返回 null）。"""
+    resp = await http_fetch(
+        MUSICU_URL,
+        method="post",
+        headers={"User-Agent": UA_MUSICU},
+        body={
+            "comm": {"ct": "19", "cv": "1859", "uin": "0"},
+            "req": {
+                "module": "music.pf_song_detail_svr",
+                "method": "get_song_detail_yqq",
+                "param": {"song_type": 0, "song_mid": songmid},
+            },
+        },
+    )
+    body = resp.body if isinstance(resp.body, dict) else {}
+    req = body.get("req") or {}
+    if body.get("code") != 0 or req.get("code") != 0:
+        raise RuntimeError("获取歌曲信息失败")
+    item = (req.get("data") or {}).get("track_info") or {}
+    file = item.get("file") or {}
+    if not file.get("media_mid"):
+        return None
+
+    types, _types = _build_types(file)
+    album = item.get("album") or {}
+    album_name = album.get("name") or ""
+    album_id = album.get("mid") or ""
+    singers = item.get("singer") or []
+
+    return {
+        "singer": "、".join(str(singer.get("name")) for singer in singers if isinstance(singer, dict)),
+        "name": item.get("title"),
+        "albumName": album_name,
+        "albumId": album_id,
+        "source": "tx",
+        "interval": format_play_time(item.get("interval")),
+        "songId": item.get("id"),
+        "albumMid": album.get("mid") or "",
+        "strMediaMid": file.get("media_mid"),
+        "songmid": item.get("mid"),
+        "img": _song_img(album_id, singers),
+        "types": types,
+        "_types": _types,
+        "typeUrl": {},
+    }
+
+
+async def get_music_info(song_info: dict[str, Any]) -> dict[str, Any] | None:
+    """Platform.get_music_info 契约：song_info 里取 songmid。"""
+    songmid = song_info.get("songmid") or song_info.get("hash") or ""
+    if not songmid:
+        return None
+    return await get_music_info_by_mid(str(songmid))
+
+
+async def handle_music_info(song_info: dict[str, Any]) -> dict[str, Any]:
+    """补全缺失的歌名/歌手/封面；取不到时原样返回（不抛错）。"""
+    if song_info.get("name") and song_info.get("singer"):
+        return song_info
+    try:
+        info = await get_music_info(song_info)
+    except (RuntimeError, OSError, TimeoutError):
+        return song_info
+    if not info:
+        return song_info
+    merged = {**info, **{k: v for k, v in song_info.items() if v}}
+    return merged