[FEATURE] Provide a way to remap Ctrl+o

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I use mc (Midnight Commander, an orthodox file manager similar to FAR Manager and Norton Commander). All of these file managers use Ctrl+o to switch between the shell and the TUI. It makes it impossible to use Ctrl+o to expand lines in Claude Code.

Proposed Solution

Provide a way to reconfigure this action to another key.

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

_No response_

Additional Context

_No response_