Update Saqel Platform: 2026-09-02 09:06:45

apps/student_app/lib/logic/cubits/video_playback_cubit.dart

@@ -69,6 +69,7 @@ class VideoPlaybackError extends VideoPlaybackState {
 
 class VideoPlaybackCubit extends Cubit<VideoPlaybackState> {
   final CurriculumRepository _repo;
+  int _lastObservedPosition = -1;
 
   VideoPlaybackCubit({CurriculumRepository? repo})
       : _repo = repo ?? CurriculumRepository(),
@@ -76,6 +77,7 @@ class VideoPlaybackCubit extends Cubit<VideoPlaybackState> {
 
   Future<void> loadLesson(CurriculumLessonItemModel lesson, {SubjectModel? subject}) async {
     AppLogger.log('Loading Socratic playback for lesson: ${lesson.title}', tag: 'VIDEO_CUBIT');
+    _lastObservedPosition = -1;
     emit(VideoPlaybackLoading());
     try {
       final playback = await _repo.getLessonPlayback(lesson.markdownFilePath ?? lesson.id, subjectId: subject?.id);
@@ -97,9 +99,9 @@ class VideoPlaybackCubit extends Cubit<VideoPlaybackState> {
     if (currentState is VideoPlaybackReady && currentState.activeCheckpoint == null) {
       // Check if this second triggers a Socratic checkpoint
       for (var cp in currentState.playbackData.checkpoints) {
-        if (!currentState.passedCheckpointIds.contains(cp.id) &&
-            seconds >= cp.timestampSeconds &&
-            seconds <= cp.timestampSeconds + 2) {
+        final crossedCheckpoint = seconds >= cp.timestampSeconds &&
+            (_lastObservedPosition < cp.timestampSeconds || _lastObservedPosition > seconds);
+        if (!currentState.passedCheckpointIds.contains(cp.id) && crossedCheckpoint) {
           AppLogger.log('🚨 Socratic Checkpoint Triggered! (${cp.questionText})', tag: 'SOCRATIC_ENGINE');
           emit(currentState.copyWith(
             currentPositionSeconds: seconds,
@@ -110,6 +112,7 @@ class VideoPlaybackCubit extends Cubit<VideoPlaybackState> {
         }
       }
 
+      _lastObservedPosition = seconds;
       emit(currentState.copyWith(currentPositionSeconds: seconds));
     }
   }