The retry reused the same React keys for the same activity ids, so every
activity component kept its internal state (selected option, feedback,
flip, matched pairs) from the first run — the retried items appeared
pre-answered with the old wrong answer and could not be answered again.
- StudyFeed now keeps a runId that increments on every restart/retry and
includes it in the slide keys, so each run gets fresh component state.
- Scroll snaps back to the first slide instantly on a new run (the old
requestAnimationFrame + smooth goTo could race the queue change).
New retry suite (14 checks): answer wrong → results → retry → items are
unanswered and enabled → answer correctly → 2/2 on the retry run, plus the
full 'study again' reset. Deck-chrome 15/15, pwa 16/16, final-ux 12/12,
security 8/8, contrast 20/20.
Martin Dvorak
1bacf43ed2