offline_access 스코프 유지 처리 및 refresh_token 발급 경로 수정

backend/internal/handler/dev_handler.go

@@ -3848,7 +3848,7 @@ func normalizeClientScopes(scopes []string) []string {
 	seen := make(map[string]struct{}, len(scopes))
 	for _, scope := range scopes {
 		scope = strings.TrimSpace(scope)
-		if scope == "" || isRefreshTokenScopeAlias(scope) {
+		if scope == "" || isLegacyRefreshTokenScopeAlias(scope) {
 			continue
 		}
 		if _, ok := seen[scope]; ok {
@@ -3860,9 +3860,9 @@ func normalizeClientScopes(scopes []string) []string {
 	return normalized
 }
 
-func isRefreshTokenScopeAlias(scope string) bool {
+func isLegacyRefreshTokenScopeAlias(scope string) bool {
 	switch strings.ToLower(strings.TrimSpace(scope)) {
-	case "offline", "offline_access":
+	case "offline":
 		return true
 	default:
 		return false