[Feature]: Improve sidebar v2 with compact mode

[andremacola]

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/desktop

Problem or use case

Sidebar V2 should have a compact mode for people who don't like waste of space

Proposed solution

Here an example/suggestion how it could work

Why this matters

I have OCD 😁

Smallest useful scope

...

Alternatives considered

No response

Risks or tradeoffs

No response

Examples or references

No response

Contribution

• I would be open to helping implement this.