initializeApp function
Implementation
Future<void> initializeApp() async {
WidgetsFlutterBinding.ensureInitialized();
_prefs = await SharedPreferences.getInstance();
_initialTheme = switch (_prefs.getString(themeModeKey)) {
'light' => ThemeMode.light,
'dark' => ThemeMode.dark,
_ => ThemeMode.system,
};
_initialSidebarMinified = _prefs.getBool(sidebarMinifiedKey) ?? false;
}