feat(ecosystem): full Grade 10 curriculum sync, real device fingerprinting, teacher video dashboard, and official textbook assets

apps/teacher_app/lib/data/repositories/teacher_repository.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'dart:typed_data';
 import 'package:http/http.dart' as http;
 import '../../core/config/app_config.dart';
+import '../../core/services/device_fingerprint_service.dart';
 import '../../core/services/storage_service.dart';
 import '../../core/utils/app_logger.dart';
 import '../models/teacher_models.dart';
@@ -61,10 +62,13 @@ class TeacherRepository {
 
   Future<Map<String, String>> _authHeaders() async {
     final token = await _storage.getToken();
+    final fingerprint = await DeviceFingerprintService.getFingerprint();
+    final metadata = await DeviceFingerprintService.getDeviceMetadata();
     return {
       'Content-Type': 'application/json',
       'Accept': 'application/json',
-      'X-Device-Fingerprint': 'saqel_teacher_flutter',
+      'X-Device-Fingerprint': fingerprint,
+      'X-Device-Platform': metadata['platform'] ?? 'unknown',
       if (token != null && token.isNotEmpty) 'Authorization': 'Bearer $token',
     };
   }
@@ -103,19 +107,23 @@ class TeacherRepository {
     AppLogger.log('Verifying Teacher OTP for $phoneNumber...',
         tag: 'TEACHER_REPO');
     try {
+      final fingerprint = await DeviceFingerprintService.getFingerprint();
+      final metadata = await DeviceFingerprintService.getDeviceMetadata();
       final response = await _client
           .post(
             Uri.parse('$baseUrl${AppConfig.otpVerifyEndpoint}'),
             headers: {
               'Content-Type': 'application/json',
-              'Accept': 'application/json'
+              'Accept': 'application/json',
+              'X-Device-Fingerprint': fingerprint,
+              'X-Device-Platform': metadata['platform'] ?? 'unknown',
             },
             body: json.encode({
               'phone_number': phoneNumber,
               'otp': otp,
               'role': 'teacher',
               if (fullName != null) 'full_name': fullName,
-              'device_fingerprint': 'saqel_teacher_flutter',
+              'device_fingerprint': fingerprint,
             }),
           )
           .timeout(const Duration(seconds: 30));
@@ -546,6 +554,28 @@ class TeacherRepository {
     throw StateError('تعذر تحميل بيانات المحفظة من الخادم.');
   }
 
+  Future<List<Map<String, dynamic>>> getMySubmissions() async {
+    try {
+      final headers = await _authHeaders();
+      final response = await _client
+          .get(
+            Uri.parse('$baseUrl/api/teacher/submissions'),
+            headers: headers,
+          )
+          .timeout(const Duration(seconds: 10));
+
+      if (response.statusCode == 200) {
+        final decoded = json.decode(response.body);
+        if (decoded['status'] == 'success' && decoded['data']?['submissions'] is List) {
+          return List<Map<String, dynamic>>.from(decoded['data']['submissions']);
+        }
+      }
+    } catch (e) {
+      AppLogger.error('getMySubmissions failed', error: e, tag: 'TEACHER_REPO');
+    }
+    return [];
+  }
+
   Future<TeacherPayoutRequestModel> requestCliqPayout({
     required String cliqAlias,
     required double amountJod,