Implement multi-teacher video selector, in-app curriculum document reader, 15-question Unit 1 exam bank, and interactive science simulation engine

apps/student_app/lib/presentation/screens/player/socratic_video_player_screen.dart

@@ -15,11 +15,15 @@ import 'package:video_player/video_player.dart';
 class SocraticVideoPlayerScreen extends StatefulWidget {
   final CurriculumLessonItemModel lesson;
   final SubjectModel? subject;
+  final String? instructorName;
+  final String? videoSourceLabel;
 
   const SocraticVideoPlayerScreen({
     super.key,
     required this.lesson,
     this.subject,
+    this.instructorName,
+    this.videoSourceLabel,
   });
 
   @override
@@ -593,6 +597,28 @@ class _SocraticVideoPlayerScreenState extends State<SocraticVideoPlayerScreen> w
                               ),
                             ],
                           ),
+                          if (widget.instructorName != null || widget.videoSourceLabel != null) ...[
+                            const SizedBox(height: 10),
+                            Container(
+                              padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
+                              decoration: BoxDecoration(
+                                color: AppColors.saqelCyan.withAlpha(25),
+                                borderRadius: BorderRadius.circular(10),
+                                border: Border.all(color: AppColors.saqelCyan.withAlpha(60)),
+                              ),
+                              child: Row(
+                                mainAxisSize: MainAxisSize.min,
+                                children: [
+                                  const Icon(CupertinoIcons.person_crop_circle_fill, color: AppColors.saqelCyan, size: 14),
+                                  const SizedBox(width: 6),
+                                  Text(
+                                    widget.instructorName ?? widget.videoSourceLabel ?? 'شرح منصة صَقِل الذكية 🤖',
+                                    style: const TextStyle(color: AppColors.saqelCyan, fontSize: 11, fontWeight: FontWeight.w700),
+                                  ),
+                                ],
+                              ),
+                            ),
+                          ],
                           const SizedBox(height: 14),
                           if (widget.lesson.outcomes.isNotEmpty)
                             ...widget.lesson.outcomes.map((out) {