zsxq-shared 是做什么的？
Shared foundation for the Knowledge Planet CLI: authentication login (auth login/logout/status), configuration diagnosis (doctor/config show), generic API calling conventions (api list/api call/api raw for underlying or raw HTTP interfaces), planet and topic share link generation (desktop/mobile), safety rules for write and delete operations, and common error code handling (401 token expiration, missing parameters, etc.). Use when a user logs in for the first time, logs out, checks authentication status, calls zsxq-cli api raw / api call, needs to generate a Knowledge Planet share link, or encounters authentication or HTTP errors.