Two regressions from the template-resolution rework, plus the harness gap
that hid them:
- `instanceTargetOf` decided from the shape of the id. Unpacking keeps the
derived ids, so unpacked content still counted as template content. It now
asks whether the object is spelled out in the holder.
- The parent picker captured its holder when the row was built. Since
`viewOf()` returns a derived copy, the menu listed the objects of that
moment (measured: 40 in the model, 17 in the menu). It resolves on open.
- `evaluate()` swallowed page exceptions, so a mutate that died half-way let
every later check pass or fail for the wrong reason.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
