The unkeyed struct rule found auto-properties by the compiler's
<Name>k__BackingField name and marked the whole struct Unsupported when
one was get-only or a field was readonly. Record structs fell out with a
generic reason, and settable or init properties beside a field were
silently hidden. Editing is in place, so the lock protected nothing.
An unkeyed struct now shows its public fields (readonly ones read-only)
and its public properties that have a setter (init-only ones read-only).
Get-only properties are computed or kept by the in-place edit, so they are
not rows; vector swizzles stay out of the inspector.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>