feat(finance): add cost management backend module

src/Domain/TakeoutSaaS.Domain/Finance/Repositories/IFinanceCostRepository.cs

@@ -0,0 +1,42 @@
+using TakeoutSaaS.Domain.Finance.Enums;
+using TakeoutSaaS.Domain.Finance.Models;
+
+namespace TakeoutSaaS.Domain.Finance.Repositories;
+
+/// <summary>
+/// 成本管理仓储契约。
+/// </summary>
+public interface IFinanceCostRepository
+{
+    /// <summary>
+    /// 获取成本录入页月度快照。
+    /// </summary>
+    Task<FinanceCostMonthSnapshot> GetMonthSnapshotAsync(
+        long tenantId,
+        FinanceCostDimension dimension,
+        long? storeId,
+        DateTime costMonth,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 保存月度成本录入快照。
+    /// </summary>
+    Task SaveMonthSnapshotAsync(
+        long tenantId,
+        FinanceCostDimension dimension,
+        long? storeId,
+        DateTime costMonth,
+        IReadOnlyList<FinanceCostCategorySnapshot> categories,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 获取成本分析页快照。
+    /// </summary>
+    Task<FinanceCostAnalysisSnapshot> GetAnalysisSnapshotAsync(
+        long tenantId,
+        FinanceCostDimension dimension,
+        long? storeId,
+        DateTime costMonth,
+        int trendMonthCount,
+        CancellationToken cancellationToken = default);
+}