feat: Add Apple TV Design System Visual Reference and Component Guide

- Introduced a comprehensive visual reference for the Apple TV design system, including color palette, component specifications, typography, shadow elevation system, and animation timing guide.
- Detailed button states, card components, text styles, and navigation focus flow for improved user experience.
- Included accessibility considerations and a testing checklist to ensure compliance with design standards.

chore: Complete redesign of XtremFlow Apple TV theme

- Updated color palette to align with Apple TV aesthetics, enhancing sophistication and premium feel.
- Optimized typography for better readability at 10ft viewing distance.
- Improved focus states for remote navigation clarity.
- Implemented a new 5-level shadow system for cinematic depth.
- Refined glass effects for a premium appearance.
- Ensured all components are accessible and comfortable for remote use.

lib/mobile/theme/mobile_theme.dart

@@ -305,7 +305,7 @@ class MobileTheme {
     final baseTheme = ThemeData.light(useMaterial3: true);
 
     return baseTheme.copyWith(
-      colorScheme: AppColors.lightColorScheme,
+      colorScheme: AppColors.darkColorScheme,
       textTheme: GoogleFonts.interTextTheme(baseTheme.textTheme),
     );
   }