- coerceEpoch: early-return fallback on null/undefined input (was falling
through to new Date(null) → epoch 0, surfacing as 1970-01-01 in the
stories list); also unify the tail branch to Number.isFinite for
consistency with the number-type fast path
- autosave .catch: roll back lastSavedFingerprintRef on unexpected throw
so the next session change retries instead of silently marking the
content as saved
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
yuanzonghao
cf6e08aec4