整个课程和数据UI重新设计版本

kouyu_english/lib/features/lesson/lesson_flow.dart

@@ -4,7 +4,9 @@ import '../../core/app_state.dart';
 import '../../core/ai_service.dart';
 import '../../core/app_theme.dart';
 import '../../core/models.dart';
-import '../../core/seed_courses.dart';
+import '../../core/courses/courses.dart';
+import '../../core/courses/course_pack.dart';
+import '../../core/courses/course_repository.dart';
 import '../../core/speech_compare.dart';
 import '../../core/voice_service.dart';
 import '../../core/writing_feedback.dart';
@@ -14,6 +16,7 @@ import '../../widgets/voice_answer.dart';
 
 part 'steps/independent_step.dart';
 part 'steps/listening_step.dart';
+part 'steps/material_step.dart';
 part 'steps/preview_step.dart';
 part 'steps/reading_step.dart';
 part 'steps/speaking_step.dart';
@@ -53,10 +56,10 @@ class _LessonFlowState extends State<LessonFlow> {
   }
 
   LessonActivity get activity =>
-      activityBySegmentId(segment.id, widget.state.activeLessonId);
+      activityBySegmentId(segment.id);
 
   List<VocabularyItem> get previewItems =>
-      vocabularyBySegmentId(segment.id, widget.state.activeLessonId);
+      vocabularyBySegmentId(segment.id);
 
   @override
   void initState() {
@@ -155,6 +158,16 @@ class _LessonFlowState extends State<LessonFlow> {
           ),
           onContinue: widget.state.completeReading,
         );
+      case LessonStep.material:
+        content = _MaterialStep(
+          state: widget.state,
+          materials:
+              CourseRepository.instance
+                  .unitById(widget.state.activeLessonId)
+                  ?.materials ??
+              const [],
+          onContinue: widget.state.completeMaterial,
+        );
       case LessonStep.writing:
         content = _WritingStep(
           state: widget.state,
@@ -180,6 +193,7 @@ class _LessonFlowState extends State<LessonFlow> {
       case LessonStep.independent:
         content = _IndependentStep(
           state: widget.state,
+          lessonId: lesson.id,
           segmentId: segment.id,
           keepRecording: widget.state.keepRecordings,
           activity: activity,
@@ -199,9 +213,9 @@ class _LessonFlowState extends State<LessonFlow> {
               initialText: activity.independentPrompt,
             );
           },
-          onContinue: (spoken, recordingPath) =>
+          onContinue: (spoken, recordingPath, aiCorrected) =>
               widget.state.completeIndependentAttempt(
-                assisted: showIndependentHelp,
+                assisted: showIndependentHelp || aiCorrected,
                 spoken: spoken,
                 rawAnswer: independentController.text.trim(),
                 recordingPath: recordingPath,