The first guard block computed the partial-render condition but had an empty
if-body, so it never skipped anything — the real skip is the chapter-sync
guard further down. Delete the dead block and move its observability warning
into the live guard's else branch, eliminating the data-loss trap without
changing behavior.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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