[Bug]: no way to set custom binary path for copilot or add custom models

[brrock]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

Not sure

Steps to reproduce

1. Open settings

Expected behavior

It worked before

Actual behavior

It would let me add custom stuff

Impact

Minor bug or occasional failure

Version or commit

No response

Environment

No response

Logs or stack traces

Screenshots, recordings, or supporting files

No response

Workaround

No response