Clean up dead code, typos, and minor style issues

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

src/module/cytoscapeMap.js

@@ -181,9 +181,7 @@ export default function cytoscapeMap(
           "text-margin-y": function (node) {
             return node.data("type") === "activity" ? 2 : 0;
           },
-          padding: function (node) {
-            return node.data("type") === "activity" ? 0 : 0;
-          },
+          padding: 0,
           "text-justification": "left",
           "text-halign": "center",
           "text-valign": "center",

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

src/module/timeLabel.js

@@ -110,7 +110,7 @@ export function getTimeLabel(second, fixedNumber = 0) {
   } else if (mm > 0) {
     return ((second % hour) / minutes).toFixed(fixedNumber) + " mins";
   }
-  if (second == 0) {
+  if (second === 0) {
     return second + " sec";
   }
   return second + " sec";
@@ -141,7 +141,7 @@ export function simpleTimeLabel(second, fixedNumber = 0) {
   } else if (mm > 0) {
     return ((second % hour) / minutes).toFixed(fixedNumber) + "m";
   }
-  if (second == 0) {
+  if (second === 0) {
     return second + "s";
   }
   return second + "s";