Implement verified curriculum, video review, watch sessions, ledger safeguards, and remove demo data

apps/teacher_app/lib/logic/cubits/teacher_monetization_cubit.dart

@@ -28,6 +28,8 @@ class TeacherMonetizationState {
   final List<TeacherPayoutRequestModel> payoutRequests;
   final bool isSubmittingPayout;
   final bool isLoading;
+  final bool financialUnavailable;
+  final String financialMessage;
 
   const TeacherMonetizationState({
     required this.institutionalStudents,
@@ -44,6 +46,8 @@ class TeacherMonetizationState {
     required this.payoutRequests,
     required this.isSubmittingPayout,
     this.isLoading = false,
+    this.financialUnavailable = false,
+    this.financialMessage = '',
   });
 
   TeacherMonetizationState copyWith({
@@ -61,6 +65,8 @@ class TeacherMonetizationState {
     List<TeacherPayoutRequestModel>? payoutRequests,
     bool? isSubmittingPayout,
     bool? isLoading,
+    bool? financialUnavailable,
+    String? financialMessage,
   }) {
     return TeacherMonetizationState(
       institutionalStudents:
@@ -78,6 +84,8 @@ class TeacherMonetizationState {
       payoutRequests: payoutRequests ?? this.payoutRequests,
       isSubmittingPayout: isSubmittingPayout ?? this.isSubmittingPayout,
       isLoading: isLoading ?? this.isLoading,
+      financialUnavailable: financialUnavailable ?? this.financialUnavailable,
+      financialMessage: financialMessage ?? this.financialMessage,
     );
   }
 }
@@ -116,16 +124,21 @@ class TeacherMonetizationCubit extends Cubit<TeacherMonetizationState> {
       final mkt =
           audience['marketplace_students'] as Map<String, dynamic>? ?? {};
       final wallet = data['wallet'] as Map<String, dynamic>? ?? {};
+      final unavailable = data['financial_status'] == 'unavailable';
 
       final instCount = (inst['count'] as num?)?.toDouble() ?? 0.0;
       final paidCount = (mkt['count'] as num?)?.toDouble() ?? 0.0;
-      final gross =
-          (data['gross_revenue_jod'] as num?)?.toDouble() ?? (paidCount * 20.0);
-      final tShare = gross * 0.55;
-      final dShare = gross * 0.15;
-      final pShare = gross * 0.30;
+      final split = data['revenue_split'] as Map<String, dynamic>? ?? {};
+      // Never infer a wallet from subscriber counts, course prices, or old
+      // percentages. The backend returns null until a provider-backed ledger
+      // and eligible watch-minute policy are live.
+      final gross = (data['gross_revenue_jod'] as num?)?.toDouble() ?? 0.0;
+      final tShare = (split['teacher_amount_jod'] as num?)?.toDouble() ?? 0.0;
+      final dShare =
+          (split['directorate_amount_jod'] as num?)?.toDouble() ?? 0.0;
+      final pShare = (split['platform_amount_jod'] as num?)?.toDouble() ?? 0.0;
       final avail =
-          (wallet['available_balance_jod'] as num?)?.toDouble() ?? tShare;
+          (wallet['available_balance_jod'] as num?)?.toDouble() ?? 0.0;
       final withdrawn =
           (wallet['total_withdrawn_jod'] as num?)?.toDouble() ?? 0.0;
       final alias = wallet['cliq_payout_alias']?.toString() ?? '';
@@ -154,6 +167,8 @@ class TeacherMonetizationCubit extends Cubit<TeacherMonetizationState> {
         cliqAlias: alias,
         courses: courses,
         payoutRequests: payouts,
+        financialUnavailable: unavailable,
+        financialMessage: data['financial_message']?.toString() ?? '',
         isLoading: false,
       ));
     } catch (_) {
@@ -162,15 +177,8 @@ class TeacherMonetizationCubit extends Cubit<TeacherMonetizationState> {
   }
 
   void updateSubscribers(double subscribers) {
-    final gross = subscribers * state.pricePerCourse;
-    emit(state.copyWith(
-      studentSubscribers: subscribers,
-      grossRevenue: gross,
-      teacherShare: gross * 0.55,
-      directorateShare: gross * 0.15,
-      platformShare: gross * 0.30,
-      availableBalance: gross * 0.55,
-    ));
+    // Presentation must not fabricate revenue from a manually changed count.
+    emit(state.copyWith(studentSubscribers: subscribers));
   }
 
   Future<void> submitCliqPayout({
@@ -186,14 +194,8 @@ class TeacherMonetizationCubit extends Cubit<TeacherMonetizationState> {
       final updatedList =
           List<TeacherPayoutRequestModel>.from(state.payoutRequests)
             ..insert(0, req);
-      final newAvail =
-          (state.availableBalance - amountJod).clamp(0.0, double.infinity);
-      final newWithdrawn = state.totalWithdrawn + amountJod;
-
       emit(state.copyWith(
         payoutRequests: updatedList,
-        availableBalance: newAvail,
-        totalWithdrawn: newWithdrawn,
         isSubmittingPayout: false,
       ));
     } catch (_) {