0eb87fa0f5
JASSUB renders the ASS event matching video.currentTime + timeOffset, so an event at source time S appears at video time S - timeOffset. Adding the user delay to the offset therefore showed ASS subtitles EARLIER on positive delay, while the VTT path (and the subtitle menu's "later" label) shifts cues later. At +2000ms an ASS track diverged from an SRT track by a full 4 seconds. Subtract the delay instead, correct the comment to state the actual JASSUB render equation, and add tests covering the constructed timeOffset for positive/negative delays plus the live-instance update path. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>