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

apps/admin_app/lib/services/directorate_api_service.dart

@@ -5,6 +5,7 @@ import 'package:http/http.dart' as http;
 import '../core/services/storage_service.dart';
 import '../core/utils/app_logger.dart';
 import '../data/models/directorate_models.dart';
+import 'device_fingerprint_service.dart';
 
 /// Authenticated API client for principals, supervisors, and directorates.
 /// Operational data always comes from the server; connection errors stay errors.
@@ -21,11 +22,14 @@ class DirectorateApiService {
     if (token == null || token.isEmpty) {
       throw StateError('جلسة الإدارة غير متوفرة. يرجى تسجيل الدخول.');
     }
+    final fingerprint = await DeviceFingerprintService.getFingerprint();
+    final metadata = await DeviceFingerprintService.getDeviceMetadata();
     return {
       'Accept': 'application/json',
       'Content-Type': 'application/json',
       'Authorization': 'Bearer $token',
-      'X-Device-Fingerprint': 'saqel_admin_flutter',
+      'X-Device-Fingerprint': fingerprint,
+      'X-Device-Platform': metadata['platform'] ?? 'unknown',
     };
   }
 
@@ -75,18 +79,22 @@ class DirectorateApiService {
     required String otp,
     required String role,
   }) async {
+    final fingerprint = await DeviceFingerprintService.getFingerprint();
+    final metadata = await DeviceFingerprintService.getDeviceMetadata();
     final response = await http
         .post(
           Uri.parse('$baseUrl/api/auth/otp/verify'),
-          headers: const {
+          headers: {
             'Accept': 'application/json',
-            'Content-Type': 'application/json'
+            'Content-Type': 'application/json',
+            'X-Device-Fingerprint': fingerprint,
+            'X-Device-Platform': metadata['platform'] ?? 'unknown',
           },
           body: json.encode({
             'phone_number': phoneNumber,
             'otp': otp,
             'role': role,
-            'device_fingerprint': 'saqel_admin_flutter',
+            'device_fingerprint': fingerprint,
           }),
         )
         .timeout(const Duration(seconds: 30));