import 'package:shared_preferences/shared_preferences.dart'; class BudgetManager { static const _budgetKey = 'user_budget'; static Future getBudget() async { final prefs = await SharedPreferences.getInstance(); return prefs.getDouble(_budgetKey) ?? 10000.0; // Default value } static Future setBudget(double amount) async { final prefs = await SharedPreferences.getInstance(); await prefs.setDouble(_budgetKey, amount); } }