Enhance video playback cubit resilience and K-12 curriculum flow

apps/student_app/lib/core/theme/app_colors.dart

@@ -24,6 +24,8 @@ class AppColors {
   static const Color adminViolet = Color(0xFF8B5CF6);
   static const Color whatsappGreen = Color(0xFF25D366);
   static const Color errorRed = Color(0xFFEF4444);
+  static const Color emeraldGreen = teacherEmerald;
+  static const Color crimsonRed = errorRed;
 
   // Text Colors
   static const Color textPrimaryDark = Color(0xFFF8FAFC);

apps/student_app/lib/core/theme/app_theme.dart

@@ -31,6 +31,14 @@ class AppTypography {
     letterSpacing: -0.3,
   );
 
+  static const TextStyle titleLarge = TextStyle(
+    fontFamily: primaryFont,
+    fontFamilyFallback: fallbackFonts,
+    fontSize: 17,
+    fontWeight: FontWeight.w700,
+    letterSpacing: -0.2,
+  );
+
   static const TextStyle titleMedium = TextStyle(
     fontFamily: primaryFont,
     fontFamilyFallback: fallbackFonts,