📌 What kinds of shapes can it make right now?

Six families:

- **NACA 4-digit aerofoils** (e.g. `NACA2412 wing 200mm chord 600mm span`)
- **NACA morph wings** — interpolates two profiles along the span (`NACA2412 to NACA0009 morph 600mm`)
- **Square-to-round ducts** (`square 200mm to round 100mm duct 400mm length`)
- **Columns** — straight or twisted (`twisted column 200mm diameter 800mm height`)
- **Stars** with 3–24 points (`5-point star 200mm 400mm height`)
- **Ellipses** (`ellipse 200x100 mm 500mm length`)

Full list with examples: /ai_help.php