Addresses the approve-with-comments review on PR #154:
- applyDocToFragment: hydrate PMNode.fromJSON in its OWN try so a hydration
failure (e.g. an unknown node type) is labelled "fromJSON" — the stage that
actually threw — instead of the misleading "updateYFragment". The diagnostic
comment on unstorableYjsError ("label names the stage that failed") is now
truthful.
- assertYjsEncodable: also rehearse PMNode.fromJSON(docmostSchema, …) so a doc
that would only fail in apply's hydration step is rejected at preview time too,
narrowing the preview/apply gap (review suggestion B). Still cheap — no live
fragment, no updateYFragment.
- Tests: relabel the diagnostic test to (fromJSON); add structural-diff edge
cases — neighbour deletion keeps the unchanged node's cursor anchor, doc->empty
clears the fragment without throwing, top-level node-type change diffs in
place — plus a preview-gate test for the new fromJSON rehearsal. 297/297 green.
build/ rebuilt for the changed lib module only (build/client.js left untouched
to avoid pulling in pre-existing unrelated src/build drift).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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