添加项目文件。

EmailLib/IEmailSender.cs

@@ -0,0 +1,18 @@
+namespace TechHelper.Features
+{
+	public interface IEmailSender
+	{
+		/// <summary>
+		/// 使用 MailKit 通过邮箱发送邮件
+		/// </summary>
+		/// <param name="toEmail">收件人邮箱地址</param>
+		/// <param name="subject">邮件主题</param>
+		/// <param name="body">邮件正文 (支持 HTML)</param>
+		/// <returns></returns>
+		public Task SendEmailAsync(string toEmail,string subject, string body);
+
+		public Task SendEmailAsync(string toEmail, string body);
+
+		public Task SendEmailAuthcodeAsync(string toEmail, string authCode);
+	}
+}