### What problem does this PR solve?
Add APIs to admin server.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
Follow-up to #12488#13386
### What problem does this PR solve?
Previously, token authentication failures returned HTTP 200 with an
error code in the response body.
This PR updates `token_required` to raise `Unauthorized` and relies on
the global error handler to return a structured JSON response with HTTP
401 status.
The response body structure (`code`, `message`, `data`) remains
unchanged to preserve compatibility with the official SDK.
Frontend logic has been updated to handle HTTP 401 responses in addition
to checking `data.code`.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
feat: Adds the tenant model ID field to the interface definition
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Fix: Fixed the issue where the error prompt box on the Agent page would
be covered #3221
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
