## Why
`codex agents` rejected invocation-specific configuration, preventing the
dashboard from applying settings when starting a shared thread.
## What changed
- Accept interactive options such as model, approval, sandbox, search, working
directory, and configuration overrides when opening the agents dashboard.
- Forward supported session-flag configuration into threads started through an
embedded or remote app server, while excluding unrelated values.
- Continue to reject initial prompts and images, along with local provider and
additional-directory settings that cannot be applied to a remote server.
## Testing
- Cover accepted dashboard options and rejected incompatible inputs.
- Verify that explicit feature and sandbox overrides reach shared threads in
both embedded and remote modes.
GitOrigin-RevId: f10aa1e16ff62b49d55679e987d9e458438ba3f8