fix(core): [CORE-SUBTITLE-OFFSET-01] refresh paused native cue membership and order

packages/artplayer/src/player/subtitleOffsetMix.ts

@@ -1,4 +1,5 @@
 import type { SubtitleOffsetHost } from '../subtitle/types'
+import { refreshPausedCues } from '../subtitle/timing'
 import { clamp, def } from '../utils'
 
 export default function subtitleOffsetMix(art: SubtitleOffsetHost): void {
@@ -21,6 +22,7 @@ export default function subtitleOffsetMix(art: SubtitleOffsetHost): void {
         cue.startTime = clamp(cue.originalStartTime + offset, 0, art.duration)
         cue.endTime = clamp(cue.originalEndTime + offset, 0, art.duration)
       }
+      refreshPausedCues(template.$track.track, template.$video, cues)
       art.subtitle.update()
       notice.show = `${i18n.get('Subtitle Offset')}: ${value}s`
       art.emit('subtitleOffset', value)

packages/artplayer/src/subtitle/timing.ts

@@ -0,0 +1,16 @@
+import type { SubtitleCue } from './types'
+
+export function refreshPausedCues(track: TextTrack | undefined, video: { paused?: boolean, currentTime?: number } | undefined, cues: readonly SubtitleCue[]): void {
+  if (!track || track.mode === 'disabled' || !video?.paused || !Number.isFinite(video.currentTime))
+    return
+  const time = video.currentTime!
+  const expected = cues.filter(cue => cue.startTime <= time && time < cue.endTime)
+  const active = Array.from(track.activeCues || [])
+  if (expected.length === active.length && expected.every((cue, index) => active[index] === cue))
+    return
+  // Some engines retain stale active flags after timing edits while paused.
+  for (const cue of cues)
+    track.removeCue(cue)
+  for (const cue of cues)
+    track.addCue(cue)
+}

packages/artplayer/src/subtitle/types.ts

@@ -36,7 +36,7 @@ export interface SubtitleView {
 }
 
 export interface SubtitleOffsetHost {
-  template: { $track?: SubtitleTrack | null }
+  template: { $track?: SubtitleTrack | null, $video?: { paused?: boolean, currentTime?: number } }
   subtitle: { readonly cues: SubtitleCue[], update: () => void }
   readonly duration: number
   notice: NoticeSink