CTS Building Builder Pro v1.0.18

CONNECTED WALL GROOVES
- Selected-line grooves now continue across joined wall faces in one wall group.
- Supports L corners, wall returns, multi-step walls and connected angled faces.
- Each wall plane is re-detected after the preceding native Push/Pull cut.
- The complete connected wall must remain closed and manifold before commit.
- A failed corner is rolled back as one safe SketchUp undo operation.

CURVED WALL GROOVES
- Segmented arcs and curved walls are processed facet by facet in path order.
- The groove keeps its depth across every bend and rejoins at shared facet edges.
- Outside Width, Inside Width, Selected Portion, Extend to Wall Edges and
  Extra Length Beyond Wall remain available.

All previous tools and properties are retained.
