How to increase the font size of the chat panel I tried the apc way but not work for me

I already check this link
Changing Chat Panel Font Size / Line Height easily - #7 by vivgui - Feature Requests - Cursor - Community Forum
And add the code

"apc.stylesheet": {
  ".anysphere-markdown-container-root": "font-size: 16px; line-height: 1.4;"
}

To the settinig.json file. But the font-size not changed in the chat Panel, instead the font-size in the editor panel changed.
You can check my ui here

So what should I do ?

Hey, did you remember to enable APC?

I get this EROFS error.
When I want to enable it the error came out
I try to fix this with sudo chown -R $(whoami) $(which cursor) but not work for me. Do you have this issue before?

I tried this still not work. I gave it up.