UI indicator/affordance - "show tabs"

### what happens

I am not sure how to find the sidebar with dave, and other options.

###

see inspiration from signal 

<img width="406" height="236" alt="Image" src="https://github.com/user-attachments/assets/837e6fa5-307a-4841-b3f8-14bccda3cf79" />

<img width="494" height="319" alt="Image" src="https://github.com/user-attachments/assets/d896ede6-6aec-4995-8869-a7d748952e13" />