- Extract filterLegacyMpvPluginFileCandidates, buildYomitanAnkiSettingsKey, setMpvCurrentSecondarySubText, runSupportAssetUpdatesForLauncherResult helpers
- Include forceOverride in yomitan anki settings cache key (was missing, causing incorrect cache hits)
- Detect same-PID stale stats daemon state to avoid self-connect
- Validate non-empty extension in buildFfmpegSubtitleExtractionArgs
- Drop unused message param from showOverlayLoadingStatusNotification
- Log and rethrow on session bindings artifact write failure
- Add unit tests for all extracted helpers