Thanks for reporting this - it’s now fixed for the next release: https://feedback.objo.dev/bug/1169
Changing the code editor font will no longer affect the console output or other unrelated Studio text. I also audited the other uses of the editor font settings and corrected the same issue in notes, method metadata, and debugger labels.
The console output now has its own font family and font size settings under Settings > Editor, so it can be configured independently.