Optional official-account integration, independent of the KoKonna device API Key client. The application composition root attaches it per configured device; the FrameDeviceDriver protocol does not depend on account login or widgets.

rpc.py: in-memory official login/session, disconnect, device discovery/detail and widget query. Strict method allowlist, no retries, no raw vendor errors.
widgets.py: normalized widget states and 60-second successful query cache.
capabilities.py: full discovered client operation inventory and evidence. Discovered does not mean implemented or enabled. Unenabled operations are blocked.
widget_catalog.json: dated, non-secret fallback catalog.

The public /api/v1/devices/{device_id}/widgets endpoint is unchanged. The old drivers.kokonna.widgets.WidgetReader import remains a compatibility re-export. No raw RPC proxy or public password-login endpoint is introduced. Future admin account connection UI must use this module and keep credentials server-side. No account or session secret is automatically persisted by this module.

设备 API Key 仍负责现有设备、图片和图库接口。官方账号功能集中在本目录，不进入 DisplayService、Renderer、Scheduler 或 FrameDeviceDriver。账号登录已提供内部客户端能力；页面连接入口、写操作和会话持久化尚未实现。所有已发现但未启用的 RPC 方法均拒绝执行，不复用 API Key 的写入开关。