[Design] unify color tone

in dark mode the sidebar is warm and the pane is cold... i like the sidebar more. the ui is slop, but i need to sit down and get serious about color theory here, we lean a little too hard on pico

<img width="136" height="236" alt="Image" src="https://github.com/user-attachments/assets/6506c8b7-d443-4c42-8d72-f20e8378eb37" />

cards are inconsistent too...wtf?