LiveView.tsx passed raw nodes/edges from the store straight to
ReactFlow, bypassing the collapse pipeline that CanvasContainer applies
in the editor. Result: a group or zone marked collapsed in edit mode
still showed all its contents on /view?key=... and in standalone live
view. The flag was being persisted and read correctly — only the
read-only canvas ignored it.
Reuse the same memoized computeCollapseInfo + rewireEdgesForCollapse
pipeline. Add two regression tests that load a /liveview payload with
a collapsed group and assert the children never reach ReactFlow.
Pouzor