Fix memory leaks from Tippy.js instances and unremoved event listeners

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

src/module/cytoscapeMap.js

@@ -306,6 +306,7 @@ export default function cytoscapeMap(
   // creat tippy.js
   let tip;
   cy.on("mouseover", "node", function (event) {
+    tip?.destroy();
     const node = event.target;
     let ref = node.popperRef();
     let dummyDomEle = document.createElement("div");
@@ -319,7 +320,8 @@ export default function cytoscapeMap(
     if (node.data("label").length > 10) tip.show();
   });
   cy.on("mouseout", "node", function (event) {
-    tip?.hide();
+    tip?.destroy();
+    tip = null;
   });
 
   // here we remember and recall positions

src/module/cytoscapeMapTrace.js

@@ -96,6 +96,7 @@ export default function cytoscapeMapTrace(nodes, edges, graphId) {
   // creat tippy.js
   let tip;
   cy.on("mouseover", "node", function (event) {
+    tip?.destroy();
     const node = event.target;
     let ref = node.popperRef();
     let dummyDomEle = document.createElement("div");
@@ -109,6 +110,7 @@ export default function cytoscapeMapTrace(nodes, edges, graphId) {
     tip.show();
   });
   cy.on("mouseout", "node", function (event) {
-    tip.hide();
+    tip?.destroy();
+    tip = null;
   });
 }