feat(ucs): integrate coordinate systems

Route coordinate input, geometry creation, transforms, properties,\nviews, and viewport persistence through a shared working plane.\n\nRefs #484

src/app/command_driver.rs

@@ -1888,6 +1888,7 @@ impl OpenCADStudio {
                             &handles,
                             &crate::command::EntityTransform::Rotate {
                                 center: glam::DVec3::ZERO,
+                                axis: glam::DVec3::Z,
                                 angle_rad,
                             },
                         );