feat(douyu): 和平小店扭蛋碎片查询 + 深色模式修复 + 任务状态 WS 即时推送

- 碎片: 新增 query_xpd_fragments 任务, 复用 e语言 gamecoin 接口取扭蛋币 jb2,
  账号已存角色回退(规避 Livelink 风控), accounts.xpd_fragments 字段与迁移
- 列表: 和平小店移除鱼翅/限制兑换/换绑时间列, 新增扭蛋碎片列;
  操作区硬编码白底改用 theme token, 深色模式适配(三个手册共用)
- 轮询: 任务状态经 WS(level=task)即时推送(二维码/绑定进度即时展示),
  pending/running/终态全覆盖, REST/WS 载荷统一 douyu_task_payload,
  raw 快照递归剥离, HTTP 轮询降频 5s/30s 兜底

core/douyu/activity_client.py

@@ -1105,3 +1105,44 @@ class DouyuActivityClient:
         )
         info = self._xpd_parse_var(response.text, "banlanceInfo")
         return {"balance": self._xpd_int(info.get("balance")), "raw": info}
+
+    def xpd_fragments(
+        self,
+        *,
+        embed_query: dict[str, str],
+        act_id: str,
+        openid: str,
+        roleid: str,
+        plat: str,
+        areaid: str = "1",
+    ) -> dict[str, Any]:
+        """查询和平小店角色扭蛋碎片数量（gamecoin jb2）。"""
+        params = {
+            "_jsvar": "jbInfos",
+            "_service": "pay.idip.gamecoin.get",
+            "_app_id": "2123",
+            "acctype": "ttpp",
+            "areaid": str(areaid),
+            "eventid": "",
+            "interwork": "0",
+            "openid": openid,
+            "openkey": "openkey",
+            "partition": "0",
+            "pay_token": "",
+            "plat": str(plat),
+            "plat_pc": "0",
+            "roleid": roleid,
+            "_biz_code": "cjm",
+            "_act_id": act_id,
+            "coin_type": "1",
+            "_sid": "6",
+        }
+        response = self._request(
+            "get",
+            self.XPD_BALANCE_API,
+            source="查询小店扭蛋碎片",
+            params=params,
+            headers=self._xpd_daoju_headers(),
+        )
+        info = self._xpd_parse_var(response.text, "jbInfos")
+        return {"fragments": self._xpd_int(info.get("jb2")), "raw": info}