feat: oakengine facade, oaknode/oakrender impls, worker+CLI, app skeleton
- oaknode Rust crate: full implementation (core engine, sequence/
track/block/footage, traverser, serializer, 43 node behaviors;
493 tests green)
- oakrender Rust crate: full implementation incl. wgpu backend
skeleton, ticket arena, worker pool (136 tests green; fixed
lost-wakeup and ticket ordering races)
- src/facade/rust (oakfacade): 222 oakengine_* exports over the
module C ABIs (61 tests green); worker_main + real POSIX shm
frame-slot transport (SpscRingBuffer/FrameSlotPool, wire-compatible
with engine/render/ipc)
- cli/rust + worker/rust binaries (29 + 29 tests green)
- oakotio: FCPXML import/export (49 tests green)
- oaktask: OTIO/FCPXML format dispatch (90 tests green)
- app/rust: gpui app skeleton — dock panels (viewers/timeline/
explorer/inspector/node editor), transport, olive themes,
i18n (en/zh), 37 tests green
- gpui submodule: menu checkmarks, dock ratios, vertical meter,
CPU-frame viewer surface, drop-frame timecode