Replace .map() with .forEach() where return value is unused

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/module/cytoscapeMap.js

@@ -280,7 +280,7 @@ export default function cytoscapeMap(mapData, dataLayerType, dataLayerOption, cu
     }
     //存下此刻剛進入畫面時當前所有節點的座標位置
     const allNodes = cy.nodes();
-    allNodes.map(nodeFirstlySave => {
+    allNodes.forEach(nodeFirstlySave => {
       cytoscapeStore.saveNodePosition(nodeFirstlySave.id(), nodeFirstlySave.position(), rank);
     });