패키징 개선

backend/internal/service/worksmobile_mapper.go

@@ -46,7 +46,8 @@ type WorksmobileUserPayload struct {
 }
 
 type WorksmobileUserName struct {
-	LastName string `json:"lastName,omitempty"`
+	LastName  string `json:"lastName,omitempty"`
+	FirstName string `json:"firstName,omitempty"`
 }
 
 type WorksmobilePasswordConfig struct {
@@ -61,6 +62,26 @@ func (c WorksmobilePasswordConfig) IsZero() bool {
 		c.ChangePasswordAtNextLogin == nil
 }
 
+func worksmobileUserNameFromDisplayName(name string) WorksmobileUserName {
+	name = strings.TrimSpace(name)
+	if name == "" || strings.ContainsAny(name, " \t\r\n") {
+		return WorksmobileUserName{LastName: name}
+	}
+	runes := []rune(name)
+	if len(runes) < 2 || len(runes) > 4 {
+		return WorksmobileUserName{LastName: name}
+	}
+	for _, r := range runes {
+		if r < '가' || r > '힣' {
+			return WorksmobileUserName{LastName: name}
+		}
+	}
+	return WorksmobileUserName{
+		LastName:  string(runes[:1]),
+		FirstName: string(runes[1:]),
+	}
+}
+
 func (p WorksmobileUserPayload) MarshalJSON() ([]byte, error) {
 	type payloadJSON struct {
 		DomainID        int64                         `json:"domainId"`
@@ -299,7 +320,7 @@ func buildWorksmobileUserPayloadForDomainTenants(user domain.User, tenant domain
 		DomainID:        domainID,
 		Email:           strings.TrimSpace(user.Email),
 		UserExternalKey: user.ID,
-		UserName:        WorksmobileUserName{LastName: strings.TrimSpace(user.Name)},
+		UserName:        worksmobileUserNameFromDisplayName(user.Name),
 		CellPhone:       domain.NormalizePhoneNumber(user.Phone),
 		EmployeeNumber:  employeeNumber,
 		Locale:          "ko_KR",