// lib/metadata/metadata_constants.dart
class MetadataConstants {
  /// 首次 metadata 触发延迟（播放开始后等待时间）
  static const Duration initialTriggerDelay = Duration(seconds: 20);

  /// 重新确认进度点
  static const double recheckProgress75 = 0.75;

  static const double recheckProgress100 = 1.0;

  /// 置信度阈值
  static const double confidenceThreshold = 0.6;

  /// 最小历史证据数量
  static const int minHistoryCount = 4;
}