The analysis is complete. A bare SharedArrayBuffer passed to transfer would fall through to the else branch (since isArrayBuffer() returns false for SharedArrayBuffer) and throw TypeError: "Object is not transferable". That's already handled. The only dangerous path was a view backed by a SharedArrayBuffer, which this PR correctly fixes.

The code change is correct, well-commented, and prevents a V8 CHECK failure (process crash) that could occur when trying to detach a non-detachable buffer. The test covers the exact crash scenario. There's a minor typo in the test comment but nothing actionable.

LGTM

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