Addresses the lead-review findings on the new vocab SRS/persistence code:
- Resume a persisted study group only when every stored verb resolves,
else rebuild fresh — a partial resume desynced learnedCount from a
shrunken queue and then persisted the loss.
- studyAgain() clears the finished group before building a new one.
- VocabStudyGroupStore.persist() collapses duplicate group records
(cross-device sync races) down to the newest.
- Learn mode now derives its verb list from the live quiz queue, so it
browses exactly what's left to learn instead of a stale frozen pool.
- VerbExampleGenerator retries when the first batch throws, not only
when it returns bad data.
- Per-verb example generation tracks in-flight verbs in a Set, so the
loading spinner clears reliably and duplicate generations are skipped.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Trey T
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