Porting FreeCAD to wasm64: what broke after the compile succeeded

freecad-web 1.0 is FreeCAD 1.1.3 compiled to wasm64-emscripten and running in your browser: Qt 6.11, OCCT 7.8.1, Coin3D 4.0.3, VTK 9.3.1, CPython 3.13.3, PySide6, numpy, matplotlib, IfcOpenShell, with