Harden published curriculum and student flows

apps/student_app/lib/data/models/error_notebook_model.dart

@@ -55,6 +55,7 @@ class ErrorNotebookItem {
   final String errorCategory; // 'conceptual', 'calculation', 'rushed', 'misinterpretation'
   final String status; // 'pending_remediation', 'in_remediation', 'mastered'
   final int remediationAttemptsCount;
+  final bool retentionIsDue;
   final String? masteredAt;
   final String createdAt;
 
@@ -72,6 +73,7 @@ class ErrorNotebookItem {
     required this.errorCategory,
     required this.status,
     required this.remediationAttemptsCount,
+    this.retentionIsDue = false,
     this.masteredAt,
     required this.createdAt,
   });
@@ -125,6 +127,7 @@ class ErrorNotebookItem {
       errorCategory: json['error_category']?.toString() ?? 'conceptual',
       status: json['status']?.toString() ?? 'pending_remediation',
       remediationAttemptsCount: (json['remediation_attempts_count'] as num?)?.toInt() ?? 0,
+      retentionIsDue: json['retention_is_due'] == true || json['retention_is_due'] == 1 || json['retention_is_due'] == '1',
       masteredAt: json['mastered_at']?.toString(),
       createdAt: json['created_at']?.toString() ?? '',
     );
@@ -149,6 +152,7 @@ class ErrorNotebookItem {
       errorCategory: errorCategory,
       status: status ?? this.status,
       remediationAttemptsCount: remediationAttemptsCount ?? this.remediationAttemptsCount,
+      retentionIsDue: retentionIsDue,
       masteredAt: masteredAt ?? this.masteredAt,
       createdAt: createdAt,
     );
@@ -158,16 +162,12 @@ class ErrorNotebookItem {
 class RemedialQuestion {
   final int id;
   final String question;
-  final List<String> options;
-  final int correctIndex;
-  final String explanation;
+  final List<RemedialOption> options;
 
   RemedialQuestion({
     required this.id,
     required this.question,
     required this.options,
-    required this.correctIndex,
-    required this.explanation,
   });
 
   factory RemedialQuestion.fromJson(Map<String, dynamic> json) {
@@ -175,9 +175,17 @@ class RemedialQuestion {
     return RemedialQuestion(
       id: (json['id'] as num?)?.toInt() ?? 0,
       question: json['question']?.toString() ?? '',
-      options: rawOptions.map((e) => e.toString()).toList(),
-      correctIndex: (json['correct_index'] as num?)?.toInt() ?? 0,
-      explanation: json['explanation']?.toString() ?? '',
+      options: rawOptions.map((e) => RemedialOption.fromJson(Map<String, dynamic>.from(e as Map))).toList(),
     );
   }
 }
+
+class RemedialOption {
+  final int id;
+  final String text;
+  RemedialOption({required this.id, required this.text});
+  factory RemedialOption.fromJson(Map<String, dynamic> json) => RemedialOption(
+    id: (json['id'] as num?)?.toInt() ?? 0,
+    text: json['text']?.toString() ?? '',
+  );
+}

apps/student_app/lib/data/models/subject_model.dart

@@ -209,6 +209,8 @@ class CurriculumLessonItemModel {
   final List<String> outcomes;
   final String? markdownFilePath;
   final String? curriculumLessonId;
+  final String? curriculumVersion;
+  final String? primaryLessonAssetId;
   final int durationSeconds;
   final int checkpointsCount;
   final bool isCompleted;
@@ -220,6 +222,8 @@ class CurriculumLessonItemModel {
     this.outcomes = const [],
     this.markdownFilePath,
     this.curriculumLessonId,
+    this.curriculumVersion,
+    this.primaryLessonAssetId,
     this.durationSeconds = 0,
     this.checkpointsCount = 0,
     this.isCompleted = false,
@@ -254,6 +258,8 @@ class CurriculumLessonItemModel {
       outcomes: outs,
       markdownFilePath: filePath,
       curriculumLessonId: json['curriculum_lesson_id']?.toString(),
+      curriculumVersion: json['curriculum_version']?.toString(),
+      primaryLessonAssetId: json['primary_lesson_asset_id']?.toString(),
       durationSeconds: (json['duration_seconds'] as num?)?.toInt() ?? 0,
       checkpointsCount: (json['checkpoints_count'] as num?)?.toInt() ?? 0,
       isCompleted: (json['is_completed'] as bool?) ?? false,