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/singer.py

@@ -0,0 +1,147 @@
+"""QQ音乐歌手（移植自 sdk/tx/singer.ts）。
+
+上游歌手详情接口（musichallSinger.GetSingerDetail 等）已停用（104403），这里按原文的
+合成路径取信息：
+  * 歌手名 —— 从 GetSingerSongList 第一条曲目的 singer 数组里按 mid 反查（找不到取首位）
+  * 作品数 —— GetSingerSongList 的 totalNum
+  * 专辑数 —— GetAlbumList 的 total
+  * 头像/性别 —— 头像走固定 URL 规则（T001），性别接口已无可信来源，返回 null
+"""
+
+from __future__ import annotations
+
+import asyncio
+from typing import Any
+
+from app.sdk.platforms.tx.filter import album_img, music_info_item
+from app.sdk.platforms.tx.utils import create_musicu_fetch
+
+SONG_LIST_MODULE = "musichall.song_list_server"
+ALBUM_LIST_MODULE = "music.musichallAlbum.AlbumListServer"
+
+
+def filter_song_list(raw: Any) -> list[dict[str, Any]]:
+    """GetSingerSongList 的 songList（每项包一层 {songInfo}）→ SongInfo 列表。"""
+    return [music_info_item((item or {}).get("songInfo")) for item in raw or []]
+
+
+def filter_album_list(raw: Any) -> list[dict[str, Any]]:
+    return [
+        {
+            "id": item.get("albumID"),
+            "mid": item.get("albumMid"),
+            "count": item.get("totalNum"),
+            "info": {
+                "name": item.get("albumName"),
+                "author": item.get("singerName"),
+                "img": album_img(item.get("albumMid")),
+                "desc": None,
+            },
+        }
+        for item in raw or []
+        if isinstance(item, dict)
+    ]
+
+
+async def get_info(id: str) -> dict[str, Any]:
+    """歌手信息：歌曲数与专辑数并发取，任一失败整体失败（与原文 Promise.all 一致）。"""
+    song_body, album_body = await asyncio.gather(
+        create_musicu_fetch(
+            {
+                "req": {
+                    "module": SONG_LIST_MODULE,
+                    "method": "GetSingerSongList",
+                    "param": {"singerMid": id, "order": 1, "begin": 0, "num": 1},
+                }
+            }
+        ),
+        create_musicu_fetch(
+            {
+                "req": {
+                    "module": ALBUM_LIST_MODULE,
+                    "method": "GetAlbumList",
+                    "param": {"singerMid": id, "order": 0, "begin": 0, "num": 1, "songNumTag": 0, "singerID": 0},
+                }
+            }
+        ),
+    )
+    song_req = song_body.get("req") or {}
+    album_req = album_body.get("req") or {}
+    if song_req.get("code") != 0 or album_req.get("code") != 0:
+        raise RuntimeError("get singer info faild.")
+
+    song_data = song_req.get("data") or {}
+    album_data = album_req.get("data") or {}
+    # 详情接口停用：歌手名从歌曲条目反查
+    first_song = (song_data.get("songList") or [{}])[0] or {}
+    singers = (first_song.get("songInfo") or {}).get("singer") or []
+    self_info = next((s for s in singers if isinstance(s, dict) and s.get("mid") == id), None)
+    if self_info is None:
+        self_info = singers[0] if singers and isinstance(singers[0], dict) else {}
+    return {
+        "source": "tx",
+        "id": id,
+        "info": {
+            "name": self_info.get("name") or "",
+            "desc": None,
+            "avatar": f"https://y.gtimg.cn/music/photo_new/T001R500x500M000{id}.jpg",
+            "gender": None,
+        },
+        "count": {
+            "music": song_data.get("totalNum"),
+            "album": album_data.get("total"),
+        },
+    }
+
+
+async def get_song_list(id: str, page: int = 1, limit: int = 100) -> dict[str, Any]:
+    body = await create_musicu_fetch(
+        {
+            "req": {
+                "module": SONG_LIST_MODULE,
+                "method": "GetSingerSongList",
+                "param": {"singerMid": id, "order": 1, "begin": (page - 1) * limit, "num": limit},
+            }
+        }
+    )
+    req = body.get("req") or {}
+    if req.get("code") != 0:
+        raise RuntimeError("get singer song list faild.")
+    data = req.get("data") or {}
+    return {
+        "source": "tx",
+        "list": filter_song_list(data.get("songList")),
+        "limit": limit,
+        "page": page,
+        "total": data.get("totalNum"),
+    }
+
+
+async def get_album_list(id: str, page: int = 1, limit: int = 10) -> dict[str, Any]:
+    body = await create_musicu_fetch(
+        {
+            "req": {
+                "module": ALBUM_LIST_MODULE,
+                "method": "GetAlbumList",
+                "param": {
+                    "singerMid": id,
+                    "order": 0,
+                    "begin": (page - 1) * limit,
+                    "num": limit,
+                    "songNumTag": 0,
+                    "singerID": 0,
+                },
+            }
+        }
+    )
+    req = body.get("req") or {}
+    if req.get("code") != 0:
+        raise RuntimeError("get singer album faild.")
+    data = req.get("data") or {}
+    return {
+        "source": "tx",
+        "list": filter_album_list(data.get("albumList")),
+        "limit": limit,
+        "page": page,
+        "total": data.get("total"),
+    }