Clean up dead code, typos, and minor style issues

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

src/module/cytoscapeMapTrace.js

@@ -25,7 +25,6 @@ cytoscape.use(dagre);
  *   backgroundColor, bordercolor, height, id, label, shape, and width.
  * @param {Array<Object>} edges - Array of edge data objects.
  * @param {HTMLElement} graphId - The DOM container element for Cytoscape.
- * @returns {cytoscape.Core} The configured Cytoscape instance.
  */
 export default function cytoscapeMapTrace(nodes, edges, graphId) {
   // create Cytoscape