Bun Check Fix

Goal

The first real failure was in @platejs/selection#typecheck.
The failing file was packages/selection/src/react/hooks/useSelectionArea.spec.tsx.
The error was TS2554: Expected 0 arguments, but got 1 at the mock instantiation new SelectionAreaMock(options).
That was a stale spec typing mismatch, not a runtime package bug.
After that, the fast suite was still red because test-fast.mjs only isolated specs that directly contained mock.module(.
packages/toc/src/react/hooks/useContentObserver.spec.tsx was still running in the shared batch because its mock.module(...) calls lived in packages/toc/src/react/hooks/tocHookMocks.ts.
The runner now recursively follows local imports and isolates specs whose helper graph contains mock.module(.
Root bun check then hit the known hashed-dist workspace race during g:build.
g:build now falls back to turbo --concurrency=1 after a failed parallel build, and g:typecheck uses that stabilized build wrapper once instead of doing two blind parallel retries.