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

apps/teacher_app/lib/presentation/screens/teacher_main_shell.dart

@@ -6,6 +6,7 @@ import '../../core/utils/saqel_toast.dart';
 import '../../data/models/teacher_models.dart';
 import '../../logic/cubits/teacher_auth_cubit.dart';
 import 'tabs/teacher_studio_upload_tab.dart';
+import 'tabs/teacher_submissions_tab.dart';
 import 'tabs/teacher_monetization_tab.dart';
 import 'tabs/teacher_reputation_scorecard_tab.dart';
 import 'tabs/teacher_assignments_qna_tab.dart';
@@ -353,11 +354,14 @@ class _TeacherMainShellState extends State<TeacherMainShell> {
             ),
             body: IndexedStack(
               index: _currentTabIndex,
-              children: const [
-                TeacherStudioUploadTab(),
-                TeacherMonetizationTab(),
-                TeacherReputationScorecardTab(),
-                TeacherAssignmentsQnATab(),
+              children: [
+                const TeacherStudioUploadTab(),
+                TeacherSubmissionsTab(
+                  onNavigateToUpload: () => setState(() => _currentTabIndex = 0),
+                ),
+                const TeacherMonetizationTab(),
+                const TeacherReputationScorecardTab(),
+                const TeacherAssignmentsQnATab(),
               ],
             ),
             bottomNavigationBar: Container(
@@ -379,8 +383,12 @@ class _TeacherMainShellState extends State<TeacherMainShell> {
                 elevation: 0,
                 items: const [
                   BottomNavigationBarItem(
-                    icon: Icon(CupertinoIcons.videocam_circle_fill),
-                    label: 'استوديو الحصص',
+                    icon: Icon(CupertinoIcons.cloud_upload_fill),
+                    label: 'استوديو الرفع',
+                  ),
+                  BottomNavigationBarItem(
+                    icon: Icon(CupertinoIcons.play_rectangle_fill),
+                    label: 'حصصي وفيديوهاتي',
                   ),
                   BottomNavigationBarItem(
                     icon: Icon(CupertinoIcons.money_dollar_circle_fill),