init method
Initialize the service. Must be called before using other methods.
Implementation
Future<void> init() async {
if (_isInitialized) return;
try {
_prefs = await SharedPreferences.getInstance();
_isInitialized = true;
} catch (e) {
debugPrint('SubZeroOnboardingService: Failed to initialize: $e');
_isInitialized = true; // Still mark as initialized to prevent retries
}
}