테이블 노드 위치정보 저장 구현

frontend/lib/api/dataflow.ts

@@ -115,6 +115,16 @@ export interface DataFlowDiagramsResponse {
   hasPrev: boolean;
 }
 
+// 노드 위치 정보 타입
+export interface NodePosition {
+  x: number;
+  y: number;
+}
+
+export interface NodePositions {
+  [tableName: string]: NodePosition;
+}
+
 // 새로운 JSON 기반 타입들
 export interface JsonDataFlowDiagram {
   diagram_id: number;
@@ -123,6 +133,7 @@ export interface JsonDataFlowDiagram {
     relationships: JsonRelationship[];
     tables: string[];
   };
+  node_positions?: NodePositions;
   company_code: string;
   created_at?: string;
   updated_at?: string;
@@ -147,6 +158,7 @@ export interface CreateDiagramRequest {
     relationships: JsonRelationship[];
     tables: string[];
   };
+  node_positions?: NodePositions;
 }
 
 export interface JsonDataFlowDiagramsResponse {