2321c2dc06
Replace direct `navigation.navigate()` and `navigation.getParent()?.navigate()` calls with centralized `navigationService.navigate()` across multiple screens. Convert screen component functions from JSX elements to array-returning functions in RootNavigator to fix React key warnings and improve render consistency. - HomeScreen: use navigationService for post and user navigation - PrivateChatInfoScreen: use navigationService for profile navigation - ChatScreen: use navigationService for avatar press and user profile navigation - RootNavigator: convert PublicScreens and AuthenticatedScreens to getPublicScreens() and getAuthenticatedScreens() functions returning arrays with proper keys