feat(finance): implement invoice and business report backend modules

src/Domain/TakeoutSaaS.Domain/Finance/Services/IFinanceBusinessReportExportService.cs

@@ -0,0 +1,38 @@
+using TakeoutSaaS.Domain.Finance.Models;
+
+namespace TakeoutSaaS.Domain.Finance.Services;
+
+/// <summary>
+/// 经营报表导出服务契约。
+/// </summary>
+public interface IFinanceBusinessReportExportService
+{
+    /// <summary>
+    /// 导出单条报表 PDF。
+    /// </summary>
+    Task<byte[]> ExportSinglePdfAsync(
+        FinanceBusinessReportDetailSnapshot detail,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 导出单条报表 Excel。
+    /// </summary>
+    Task<byte[]> ExportSingleExcelAsync(
+        FinanceBusinessReportDetailSnapshot detail,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 导出批量报表 PDF。
+    /// </summary>
+    Task<byte[]> ExportBatchPdfAsync(
+        IReadOnlyList<FinanceBusinessReportDetailSnapshot> details,
+        CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// 导出批量报表 Excel。
+    /// </summary>
+    Task<byte[]> ExportBatchExcelAsync(
+        IReadOnlyList<FinanceBusinessReportDetailSnapshot> details,
+        CancellationToken cancellationToken = default);
+}
+