Complete Socratic adaptive exams in Flutter, Guardian WhatsApp alerts, and curriculum robustness

apps/student_app/lib/data/repositories/app_repositories.dart

@@ -3,6 +3,7 @@ import '../../core/network/api_client.dart';
 import '../../core/services/storage_service.dart';
 import '../models/user_model.dart';
 import '../models/lesson_model.dart';
+import '../models/exam_model.dart';
 
 /// Authentication Repository (OTP, National ID, me, logout)
 class AuthRepository {
@@ -176,3 +177,52 @@ class GuardianRepository {
     return [];
   }
 }
+
+/// Exam Repository (Adaptive Exams, Questions, Diagnostic Submissions)
+class ExamRepository {
+  final ApiClient _api;
+
+  ExamRepository({ApiClient? api}) : _api = api ?? ApiClient();
+
+  Future<List<ExamModel>> getExams({int? courseId, int? lessonId, String? scope}) async {
+    final params = <String, dynamic>{};
+    if (courseId != null) params['course_id'] = courseId;
+    if (lessonId != null) params['lesson_id'] = lessonId;
+    if (scope != null) params['scope'] = scope;
+
+    final res = await _api.get(AppConfig.examsEndpoint, queryParams: params);
+    if (res is Map && res['data'] is List) {
+      return (res['data'] as List)
+          .map((item) => ExamModel.fromJson(Map<String, dynamic>.from(item)))
+          .toList();
+    }
+    return [];
+  }
+
+  Future<ExamModel> getExamDetails(int examId) async {
+    final res = await _api.get('${AppConfig.examsEndpoint}/$examId');
+    if (res is Map && res['data'] is Map) {
+      return ExamModel.fromJson(Map<String, dynamic>.from(res['data']));
+    }
+    throw ApiException('فشل تحميل تفاصيل الامتحان');
+  }
+
+  Future<ExamSubmissionResultModel> submitExam(
+    int examId, {
+    required List<Map<String, dynamic>> answers,
+    required int timeSpentSeconds,
+  }) async {
+    final res = await _api.post(
+      '${AppConfig.examsEndpoint}/$examId/submit',
+      body: {
+        'answers': answers,
+        'time_spent_seconds': timeSpentSeconds,
+      },
+    );
+
+    if (res is Map && res['data'] is Map) {
+      return ExamSubmissionResultModel.fromJson(Map<String, dynamic>.from(res['data']));
+    }
+    throw ApiException('فشل تقديم الامتحان والتشخيص الذكي');
+  }
+}