[FEATURE]: keybind to toggle thinking visibility (/thinking)

[leonasdev]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Add a configurable TUI keybind to toggle thinking visibility, equivalent to running /thinking.

• Motivation: quickly hide/show thinking without typing a slash command.
• Proposal: new config entry keybinds.thinking_toggle wired to the existing session.toggle.thinking command.
• Default: ctrl+o for Claude Code parity (happy to switch default to <leader>o if preferred by maintainers).
• Notes: no behavior change beyond adding the shortcut; /thinking still works.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• WebUI: thinking/reasoning blocks hidden after response completion, no way to show them #7866: WebUI: thinking/reasoning blocks hidden after response completion, no way to show them

Feel free to ignore if none of these address your specific case.

[github-actions]

For keybind-related issues, please also check our pinned keybinds documentation: #4997