fix: restore soft-deleted users on login

model/log.go

@@ -88,6 +88,33 @@ func GetLogByTokenId(tokenId int) (logs []*Log, err error) {
 	return logs, err
 }
 
+// RecordUserRestoreLog writes an audit-log entry whenever a soft-deleted user
+// is automatically restored (e.g. by logging in again via password or OAuth).
+// `source` describes the trigger, e.g. "github", "linuxdo", "telegram", "password".
+// `callerIp` may be empty when the call originates from the model layer.
+func RecordUserRestoreLog(userId int, source string, callerIp string) {
+	username, _ := GetUsernameById(userId, false)
+	other := map[string]interface{}{}
+	if source != "" {
+		other["restore_source"] = source
+	}
+	if callerIp != "" {
+		other["caller_ip"] = callerIp
+	}
+	log := &Log{
+		UserId:    userId,
+		Username:  username,
+		CreatedAt: common.GetTimestamp(),
+		Type:      LogTypeSystem,
+		Content:   fmt.Sprintf("软删除用户被自动恢复，来源 %s", source),
+		Ip:        callerIp,
+		Other:     common.MapToJsonStr(other),
+	}
+	if err := LOG_DB.Create(log).Error; err != nil {
+		common.SysLog("failed to record user restore log: " + err.Error())
+	}
+}
+
 func RecordLog(userId int, logType int, content string) {
 	if logType == LogTypeConsume && !common.LogConsumeEnabled {
 		return