[FEATURE] Sidebar can no longer be pinned

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 just updated Claude Code on MacOS and now the sidebar always is closed. It is very annoying to not be able to see the other sessions at the same time, especially when you are working on more than one and one of them needs attention

Proposed Solution

It is self-explanatory. Have a way to pin it

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_