[feat] fetch get json request return 403 not 302

## Describe the feature

When we use fetch to get json data from server，userauth return 302 with redirect url。Fetch will throw TypeError: failed to fetch caused by cors error. It's better to throw 403 with login expired message to make frontend do the re-login easily.

Start by tracing the userauth middleware's handling of fetch requests and the existing 302 redirect path; no file or test is named in the issue. Verify the behavior with a JSON request, and consider the work done when an expired login produces a 403 with a login-expired message instead of a redirect.

Written by the indexing model from the issue text.