- Add Content-Length pre-check to story-pack and story-unpack routes
to reject oversized payloads before buffering the body
- Suppress internal error details in story-unpack catch (was leaking
e.message to the client)
- Strengthen sceneIndex validation: require non-negative integer
- Guard against undefined storyState when replaying shared stories
- Fix prefetch regression: remove currentBeat?.id from useEffect deps
that was re-triggering all change-scene prefetches on every beat
- Fix double detach: use else-if so the second replay detach guard
doesn't fire redundantly after the first already detached
- Align client file-size limit by format (.json 12MB, .infiplot 13MB)
- Move "载入剧情" import button next to "开始" with hover tooltip
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>