연결 이름 수정 로직 수정

frontend/components/dataflow/SaveDiagramModal.tsx

@@ -155,11 +155,11 @@ const SaveDiagramModal: React.FC<SaveDiagramModalProps> = ({
                       <div className="flex-1">
                         <div className="flex items-center gap-2 text-sm">
                           <Badge variant="secondary" className="text-xs">
-                            {relationship.relationshipType}
+                            {relationship.connectionType || "simple-key"}
                           </Badge>
-                          <span className="font-medium">{relationship.fromTable}</span>
-                          <span className="text-gray-500">→</span>
-                          <span className="font-medium">{relationship.toTable}</span>
+                          <span className="font-medium">
+                            {relationship.relationshipName || `${relationship.fromTable} → ${relationship.toTable}`}
+                          </span>
                         </div>
                         <div className="mt-1 text-xs text-gray-600">
                           {relationship.fromColumns.join(", ")} → {relationship.toColumns.join(", ")}