- copy engine/render to src/render/src (sunk param types excluded),
de-Qt in five parallel groups: core machinery (tickets/worker pool/
jobs), caches, color/texture, preview/IPC, GPU backends
- replace Qt GL/Vulkan wrappers with native context abstractions
(CGL/EGL/WGL, raw vulkan.h), QProcess with POSIX WorkerProcess,
QJsonObject with a minimal NDJSON-compatible workerjson (wire
protocol unchanged), QDataStream disk state with a byte-compatible
BinaryStream
- signals become single std::function callbacks or facade-triggered
calls per the documented signal/slot strategy
- pure C ABI in include/render + src/render/c_api (renderer/cache/
color/manager families, OAKRENDER_E_* codes), 37 gtest cases
- bridge src/node/transition/render/* stubs to the real oakrender
headers, closing the node<->render cycle: liboaknode links
liboakrender, zero dangling symbols
- docs: M7 implementation status + oakrender semantic-change notes