import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

/// App 语言设置（脚手架）。
///
/// `null` = 跟随系统；Task 10 补齐：持久化（settings 存储）、
/// 设置页交互与全部页面的 l10n 覆盖检查。
class LocaleSettings extends Notifier<Locale?> {
  @override
  Locale? build() => null;

  void setLocale(Locale? locale) => state = locale;
}

final localeSettingsProvider =
    NotifierProvider<LocaleSettings, Locale?>(LocaleSettings.new);