# 官方能力模块 / Official capabilities

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 is exposed. The admin-only `/official/connection` endpoint
provides login (POST), state/discovery (GET), local frame association (PUT), and
local disconnect (DELETE), under `/api/v1/devices/{device_id}`. Browser requests
use the existing Frame Flow session and CSRF protection; API clients require admin.

`connection.py` persists the official session and selected robot in
`/config/official-{device_id}.secret`, atomically with mode 0600. Passwords are
transient and never stored. These files must not be committed or exposed to users.
Disconnect clears the local secret, including on restart; it does not revoke
remote official account sessions. Expired sessions require logging in again.
No login refresh or stored-password automatic retry is performed.

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。
账号连接页面与会话持久化已实现；额外写操作尚未实现。
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。