Persist Reasoning Effort between sessions

Describe the feature or problem you'd like to solve

Preserve not only the model but the reasoning effort to be used.

Proposed solution

I’d like the reasoning effort setting to persist across restarts as a default. Today, /config model persists, but the effort resets to Medium even after setting High in /settings. This makes it impossible to define a default high-effort profile for all sessions. Please prioritize making effort part of the persisted app settings.

Example prompts or workflows

Use the CLI’s config command to set the default reasoning effort:

• User default:  /config reasoning-effort high 
• Repo-only default:  /config --repo reasoning-effort high 
• Local-only default:  /config --local reasoning-effort high 

If you want to confirm current settings, run:

•  /config 

This changes the default reasoning effort for future sessions; the current session can be adjusted with  /model  or the session settings UI if needed.

Additional context

No response

CLI の /config コマンドと永続化される app-settings パスを追跡し、まず既存の model 値が再起動後も保持される仕組みを確認する。reasoning-effort の user、--repo、--local の値を検証し、確認の間に再起動して、/config がそれらをデフォルト値として報告する一方、現在のセッション設定は別個のままであることを確認する。