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backend/F9WebAiTest.Domain/Entities/AggregateRoot.cs

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+namespace F9WebAiTest.Domain.Entities;
+
+/// <summary>
+/// DDD 聚合根基类：BusinessEntity + 领域事件。
+/// 聚合根是聚合的入口与唯一代表，外部只能通过聚合根访问聚合内部对象，通过仓储持久化。
+/// 参考 BBIT.F9.Domain.Entities.AggregateRoot
+/// </summary>
+public abstract class AggregateRoot : BusinessEntity, IAggregateRoot
+{
+    private readonly List<IDomainEvent> _domainEvents = new();
+    public IReadOnlyCollection<IDomainEvent> DomainEvents => _domainEvents.AsReadOnly();
+
+    protected void AddDomainEvent(IDomainEvent domainEvent) => _domainEvents.Add(domainEvent);
+
+    public void ClearDomainEvents() => _domainEvents.Clear();
+}
+
+/// <summary>聚合根标记接口</summary>
+public interface IAggregateRoot
+{
+}