- New GroupRectNode: rounded rect with NodeResizer (8 handles), no
connection handles, always behind network nodes via negative zIndex
- GroupRectModal: label, font preset (Inter/Mono/Serif), 3×3 text
position grid, text/border/background color pickers, z-order 1–9
- Sidebar: "Add Rectangle" button (below Add Node), group rects
excluded from node count stats
- Save/load: size persisted in custom_colors.width/height, no backend
schema changes required
- elevateNodesOnSelect=false on ReactFlow so selected rects never
pop above network nodes
- Tests: 3 new store tests + 9 GroupRectModal tests (66 total, all pass)
Pouzor