Blade Styles & Viewer Improvements
New blade styles for cookie cutters, inner area calculation, improved viewer controls, and better input handling.

New #
Blade style selector added to the Cookie Cutter module with three options:
- Standard — default cutting edge
- Tapered — stepped taper with adjustable number of steps
- Sloped — smooth angled edge with controllable chamfer width and height
Inner area calculation added to the viewer to display the effective cutting area of the design.
Direct numeric input enabled — you can now type exact values without using sliders or steppers.
Improved #
- Manifold viewer updated with a cleaner pill-style toolbar combining:
- area display
- camera controls
Fixed #
- Camera reset now fully stops rotation and correctly restores the default view.