初始化

FutureMailAPI/Services/IFileUploadService.cs

@@ -0,0 +1,12 @@
+using Microsoft.AspNetCore.Http;
+using FutureMailAPI.DTOs;
+
+namespace FutureMailAPI.Services
+{
+    public interface IFileUploadService
+    {
+        Task<ApiResponse<FileUploadResponseDto>> UploadFileAsync(IFormFile file, int userId, FileUploadRequestDto request);
+        Task<ApiResponse<bool>> DeleteFileAsync(string fileId, int userId);
+        Task<ApiResponse<FileUploadResponseDto>> GetFileAsync(string fileId, int userId);
+    }
+}