[FEATURE]: Refresh wellknown auth on 401 Unauthorized

[aberglund-cf]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

When wellknown auth tokens expire they must be refreshed by executing opencode auth login https://.... If opencode was already running the process must also be restarted. A token with a short lifespan causes this to be a frequent annoyance.

A improved behavior would be to attempt a to execute the login flow for all configured welknown auth tokens after getting a 401 error response.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [BUG] GitLab OAuth token not auto-refreshed on 401 during session #9711: Very similar request — auto-refresh OAuth token on 401 Unauthorized during a session (GitLab-specific, but the core mechanism is the same)