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/wy/__init__.py

@@ -0,0 +1,61 @@
+"""网易音乐（wy）平台模块 —— 移植自 sdk/wy/index.ts + sdk/apis/wy.ts。
+
+能力位与原实现对齐：
+  music_search / leaderboard / song_list / hot_search / comment / singer /
+  album / playlist / parse / user_playlist / get_music_url / get_lyric / get_pic /
+  get_music_info / get_music_detail_page_url
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from app.sdk.platforms._base import Platform
+from app.sdk.platforms.wy import (
+    album,
+    comment,
+    hot_search,
+    leaderboard,
+    lyric,
+    music_search,
+    parse,
+    playlist,
+    singer,
+    song_list,
+    user_playlist,
+)
+from app.sdk.platforms.wy.music_info import get_music_info
+from app.sdk.platforms.wy.pic import get_pic
+
+
+def get_music_detail_page_url(song_info: dict[str, Any]) -> str:
+    return f"https://music.163.com/#/song?id={song_info.get('songmid')}"
+
+
+async def get_music_url(song_info: dict[str, Any], quality: str, retry_num: int = 0) -> dict[str, Any]:
+    """取流入口。延迟导入 apis.wy：apis 模块反向依赖 platforms.wy.utils，
+    模块级互相 import 会在「先导入 apis」的入口下拿到半初始化的模块。"""
+    from app.sdk.apis import wy as wy_api
+
+    return await wy_api.get_music_url(song_info, quality, retry_num)
+
+
+MODULE = Platform(
+    id="wy",
+    name="网易音乐",
+    music_search=music_search,
+    leaderboard=leaderboard,
+    song_list=song_list,
+    hot_search=hot_search,
+    comment=comment,
+    singer=singer,
+    album=album,
+    playlist=playlist,
+    parse=parse,
+    user_playlist=user_playlist,
+    get_music_url=get_music_url,
+    get_lyric=lyric.get_lyric,
+    get_pic=get_pic,
+    get_music_info=get_music_info,
+    get_music_detail_page_url=get_music_detail_page_url,
+)