feat(Theme): enhance theming and UI consistency across components

- Updated app.json to set userInterfaceStyle to automatic for improved theme adaptability.
- Refactored layout components to utilize useAppColors for dynamic theming, ensuring consistent color usage.
- Introduced SystemChrome component to manage system UI background color based on theme.
- Enhanced TabsLayout, ProfileStackLayout, and other components to leverage new theming structure.
- Improved QRCodeScanner, SearchBar, and CommentItem styles to align with the updated theme system.
- Consolidated styles in SystemMessageItem and TabBar for better maintainability and visual coherence.

src/stores/index.ts

@@ -44,6 +44,17 @@ export { userManager } from './userManager';
 export {
   useHomeTabBarVisibilityStore,
 } from './homeTabBarVisibilityStore';
+export {
+  useAppColors,
+  useThemePreference,
+  useResolvedColorScheme,
+  useSetThemePreference,
+  usePaperThemeFromStore,
+  ThemeBootstrap,
+  useThemeStore,
+  type ThemePreference,
+  type ResolvedScheme,
+} from './themeStore';
 export {
   useConversations as useMessageManagerConversations,
   useMessages,