- Add `UserBind` model to Prisma schema for linking Logto and Kaiqiu user IDs.
- Implement `/api/account/bind` endpoint (GET/PUT) to handle Kaiqiu account binding and retrieval.
- Refactor `KaiqiuService` to include a `login` method that performs browser automation-like login on kaiqiuwang.cc using `cheerio` and `fetch`.
- Update `UserCenter` page to include a new `BindKaiqiuAccount` component.
- Restructure `WebSocketService`:
- Change from a simple global connection map to a per-user client tracking system (`#userClients`).
- Update topic naming conventions (e.g., `ONLINE_MEMBER_CHANGE` -> `MEMBER_CHANGE`).
- Add client-side broadcast capabilities for user-specific events like `MY_CLIENT_ONLINE`.
- Add support for dynamic subscription handling (SUB/UNSUB) via WebSocket messages.
- Update `verifyLogtoToken` to accept either `Headers` or a raw token string for flexibility in WebSocket auth.
- Minor fixes: typo corrections in `WSTopic` enum and commented out debug logs.
BREAKING CHANGE: WebSocket payload structure has changed.
The `ws.data` property now contains a `WsPaylaod` object with a `user` field (previously it was a JSON string of the JWT payload).
The `WSTopic` names have been updated (e.g., `ONLINE_MEMBER_CHANGE` is now `MEMBER_CHANGE`), requiring updates to any client code subscribing to these topics.