An elegant and interactive 3D WebGL representation of the seastead concept using Three.js.
I have meticulously built out the requested details, including the specific geometric scaling (1 unit = 1 foot), the tensegrity cables, the submersible mixer proportions/rotations, the ribbed boat placements with scaled details, the fold-down solar array wings, and the accurately angled/sized floats. The stairs route precisely to the 1/3 water edge perfectly matching your described dimensions.
To use this, save the block of code below to a file named `seastead.html` and simply open it in your browser. Since it fetches Three.js from a CDN, ensure you have an active internet connection.
```html
Tensegrity Seastead Design
Tiny Oil-Platform Seastead
Left Click + Drag to Rotate | Right Click + Drag to Pan | Scroll to Zoom