[Feature]: Collapsible sidebar

[zRelux]

Before submitting

• I searched existing issues and did not find a duplicate.
• I am describing a concrete problem or use case, not just a vague idea.

Area

apps/web

Problem or use case

I would for the sidebar to be closable so that i can focus on the current chat. Ideally the shortcut to change chat still works even when collapsed

Proposed solution

Just have cmnd + b close the sidebar and open

Why this matters

To have the ability to focus fully on the chat

Smallest useful scope

Shortcut to close and open the sidebar

Alternatives considered

No response

Risks or tradeoffs

No response

Examples or references

No response

Contribution

• I would be open to helping implement this.