- scan.acfun.cn QR flow (start -> long-poll scanResult -> acceptResult) with
rotated-signature handling, background poller, durable session in the Host
credential service, and cookie handoff to the provider
- Client half: Settings -> AcFun page (status, QR code, poll, logout) over a
same-origin /acfun-panel JSON API with cross-origin rejection
- acfun_moment / acfun_moment_comments / acfun_topic read tools, moment_like /
moment_unlike / moment_banana actions, and comment posting on moments
- acfun_account status tool; docs for the QR contract, the 广场/动态 research
verdict, and the client-composition restart requirement
