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/joox/song.py

@@ -0,0 +1,96 @@
+"""JOOX 歌曲形状映射（对应 sdk/joox/song.ts）。
+
+统一 Song 形状（见 tmp/port-spec.md）；兼容来源：openjoox2 track/album/playlist 条目、
+openjoox v3 search 的 song_info、以及 SSR 页面上的 track 条目（字段有 snake/camel 两套命名，
+上游 Go 也两套都兜底）。
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from app.sdk.common.utils import format_play_time
+from app.sdk.platforms.joox.util import (
+    first_non_empty,
+    first_non_zero,
+    joox_artists,
+    normalize_joox_id,
+    pick_joox_image,
+    to_int,
+)
+
+
+def joox_song_from_track(
+    item: Any,
+    fallback_album: str = "",
+    fallback_cover: str = "",
+    fallback_album_id: str = "",
+) -> dict[str, Any] | None:
+    """详情/列表 track 条目 → 统一 Song 形状。"""
+    if not isinstance(item, dict):
+        item = {}
+    songmid = normalize_joox_id(item.get("id"))
+    if not songmid:
+        return None
+
+    artists = item.get("artist_list")
+    if not (isinstance(artists, list) and artists):
+        artists = item.get("artistList")
+    album_id = normalize_joox_id(first_non_empty(item.get("album_id"), item.get("albumId"), fallback_album_id))
+
+    return {
+        "songmid": songmid,
+        "name": str(first_non_empty(item.get("name"), item.get("title"), "Unknown")),
+        "singer": str(first_non_empty(joox_artists(artists), "Unknown")),
+        "albumId": str(album_id or ""),
+        "albumName": str(first_non_empty(item.get("album_name"), item.get("albumName"), fallback_album)),
+        "interval": format_play_time(
+            first_non_zero(item.get("play_duration"), item.get("playDuration"), item.get("duration"))
+        ),
+        "img": str(
+            first_non_empty(
+                pick_joox_image(item.get("images")),
+                item.get("imgSrc"),
+                item.get("cover"),
+                item.get("image"),
+                item.get("pic"),
+                fallback_cover,
+            )
+        )
+        or None,
+        "lrc": None,
+        "vip": to_int(item.get("vip_flag") if item.get("vip_flag") is not None else 0) == 1,
+        "types": [],
+        "_types": {},
+        "source": "joox",
+    }
+
+
+def joox_song_from_search(info: Any) -> dict[str, Any] | None:
+    """openjoox v3 搜索歌曲条目（song_info）→ 统一 Song 形状。"""
+    return joox_song_from_track(info)
+
+
+def joox_song_from_detail(detail: Any, play_url: str = "") -> dict[str, Any]:
+    """详情接口返回的整曲信息（parse 用，含可播放地址）→ 统一 Song 形状。"""
+    if not isinstance(detail, dict):
+        detail = {}
+    song = joox_song_from_track(detail)
+    if song is None:
+        song = {
+            "songmid": normalize_joox_id(detail.get("id")),
+            "name": str(detail.get("name") or ""),
+            "singer": str(joox_artists(detail.get("artist_list"))),
+            "albumId": str(normalize_joox_id(detail.get("album_id"))),
+            "albumName": str(detail.get("album_name") or ""),
+            "interval": format_play_time(first_non_zero(detail.get("play_duration"))),
+            "img": str(pick_joox_image(detail.get("images"))) or None,
+            "lrc": None,
+            "types": [],
+            "_types": {},
+            "source": "joox",
+        }
+    if play_url:
+        song["url"] = play_url
+    song["vip"] = to_int(detail.get("vip_flag") if detail.get("vip_flag") is not None else 0) == 1
+    return song