Make logo smaller or at least configurable

**Is your feature request related to a problem? Please describe.**
The logo uses two lines in the shell, so effectively wasting space:

<img width="640" height="74" alt="Image" src="https://github.com/user-attachments/assets/d9bc40c7-8940-48bc-a792-a3e92739c32a" />

**Describe the solution you'd like**
Either make the logo height == 1, or make showing a logo configurable.

