v0.3.1 Release Notes

This release adds SmartArt extraction and updates shape modeling to better separate standard shapes, arrows, and SmartArt structures.

Highlights

• SmartArt extraction via Excel COM, including layout name and nested nodes.
• Shape modeling split into Shape, Arrow, and SmartArt for clearer semantics.
• SmartArt node payload optimized for compact output (layout, nodes, kids).

Compatibility Notes

• Shape.type now exists only on Shape; it is omitted for Arrow and SmartArt.
• SmartArt output uses layout and nodes with kids; previous fields like layout_name, roots, or children are no longer present.