forked from 1b-agent/opencadstudio-upstream
Conflicts were additive: main's AddLayer/ModifyLayer (LayerConfig, OptHandle) alongside this branch's v7 system-variable, transaction, selection and solid operations. Main's variants keep their positions in the IPC enums; the v7 additions follow them. src/io/mod.rs takes main's reworded Shape-rotation note. Co-Authored-By: Claude Sonnet 5 <[email protected]>