feat: 扩展领域模型与配置

src/Domain/TakeoutSaaS.Domain/Engagement/Entities/CheckInCampaign.cs

@@ -0,0 +1,45 @@
+using TakeoutSaaS.Domain.Engagement.Enums;
+using TakeoutSaaS.Shared.Abstractions.Entities;
+
+namespace TakeoutSaaS.Domain.Engagement.Entities;
+
+/// <summary>
+/// 签到活动配置。
+/// </summary>
+public sealed class CheckInCampaign : MultiTenantEntityBase
+{
+    /// <summary>
+    /// 活动名称。
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 活动描述。
+    /// </summary>
+    public string? Description { get; set; }
+
+    /// <summary>
+    /// 开始日期。
+    /// </summary>
+    public DateTime StartDate { get; set; }
+
+    /// <summary>
+    /// 结束日期。
+    /// </summary>
+    public DateTime EndDate { get; set; }
+
+    /// <summary>
+    /// 支持补签次数。
+    /// </summary>
+    public int AllowMakeupCount { get; set; }
+
+    /// <summary>
+    /// 连签奖励 JSON。
+    /// </summary>
+    public string RewardsJson { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 状态。
+    /// </summary>
+    public CheckInCampaignStatus Status { get; set; } = CheckInCampaignStatus.Draft;
+}