Zoom out cap

When zooming out, glyphs/dots become smaller on a linera scale. Maybe enforce a minimum size per dot/glyph to be able to still grasp global view visually.

<img width="192" height="173" alt="Image" src="https://github.com/user-attachments/assets/1b3c1f7f-a968-4bf5-9838-2dfc1c81d472" />