Plan

class Plan {
  final String? planId;
  final String planName;
  final Localizable title;
  final String planDescription;
  final Localizable description;
  final String planImage;
  final List<String> lessons; // lessonIds
  final List<String> tags;
  final List<String> targetAreas;
  final int? totalViews;
  final int? totalPlays;
  final int? totalCompletions;
  final DateTime? lastViewed;
  final DateTime? lastPlayed;
  final DateTime? lastCompleted;
  final String? currentPlanPlayId;
  final List<String> completedLessons; // from PlanPlay
}