loadTheme function

Implementation

Future<void> loadTheme() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  String? theme = prefs.getString('themeMode');

  if (theme == 'dark') {
    themeNotifier.value = ThemeMode.dark;
  } else if (theme == 'light') {
    themeNotifier.value = ThemeMode.light;
  } else {
    themeNotifier.value = ThemeMode.system; // Predeterminado al sistema
  }
}