fix

Application/Dto/ImportDto.cs

@@ -0,0 +1,38 @@
+namespace Application.Dto;
+
+/// <summary>
+/// 导入请求
+/// </summary>
+public record ImportRequest
+{
+    /// <summary>
+    /// 文件流
+    /// </summary>
+    public required Stream FileStream { get; init; }
+
+    /// <summary>
+    /// 文件扩展名（.csv, .xlsx, .xls）
+    /// </summary>
+    public required string FileExtension { get; init; }
+
+    /// <summary>
+    /// 文件名
+    /// </summary>
+    public string FileName { get; init; } = string.Empty;
+
+    /// <summary>
+    /// 文件大小（字节）
+    /// </summary>
+    public long FileSize { get; init; }
+}
+
+/// <summary>
+/// 导入响应
+/// </summary>
+public record ImportResponse
+{
+    /// <summary>
+    /// 导入结果消息
+    /// </summary>
+    public string Message { get; init; } = string.Empty;
+}