fix: 优化告警邮件主题生成逻辑，确保包含自定义标题

src/modules/notification/service/email.go

@@ -23,6 +23,7 @@ func EmailAlarm(a neDataModel.Alarm, neIP string) error {
 	if len(emailList) == 0 {
 		return fmt.Errorf("email list is empty")
 	}
+	toEmailArr := strings.Split(emailList, ",")
 
 	// 模板
 	htmlBodyTemplate := `
@@ -56,8 +57,15 @@ func EmailAlarm(a neDataModel.Alarm, neIP string) error {
 	}
 	htmlStr := buffer.String()
 
+	// 邮件标题
+	subjectTitle := fmt.Sprintf("%s-%s-%s", a.OrigSeverity, a.NeName, a.AlarmTitle)
+	emailTitle := fmt.Sprint(config.Get("notification.email.title"))
+	if emailTitle != "" {
+		subjectTitle = fmt.Sprintf("%s-%s", emailTitle, subjectTitle)
+	}
+
 	// 发送邮件
-	err = EmailSendHTML(htmlStr, strings.Split(emailList, ","))
+	err = EmailSendHTML(subjectTitle, htmlStr, toEmailArr)
 	if err != nil {
 		return fmt.Errorf("EmailAlarm alarmId:%s fail %s", a.AlarmId, err.Error())
 	}
@@ -65,7 +73,7 @@ func EmailAlarm(a neDataModel.Alarm, neIP string) error {
 }
 
 // EmailSendHTML 发送HTML邮件
-func EmailSendHTML(htmlStr string, toEmailArr []string) error {
+func EmailSendHTML(title, htmlStr string, toEmailArr []string) error {
 	// QQ 邮箱：
 	// SMTP 服务器地址：smtp.qq.com（SSL协议端口：465/994 | 非SSL协议端口：25）
 	// 163 邮箱：
@@ -80,7 +88,6 @@ func EmailSendHTML(htmlStr string, toEmailArr []string) error {
 	if !enable {
 		return fmt.Errorf("email notification not enable")
 	}
-	title := fmt.Sprint(emailConf["title"])
 	smtp := fmt.Sprint(emailConf["smtp"])
 	port := parse.Number(emailConf["port"])
 	user := fmt.Sprint(emailConf["user"])