fix UI

app/static/Universe3D.js

@@ -170,6 +170,9 @@ export function initUniverse(containerId, data, onNodeClick) {
     stopAutoTour: stopAutoTour,
     performQuantumMerge: performQuantumMerge,
     isQuantumMergeActive: () => quantumMerge.active
+    findSpriteByPath: (path) => clusterParticles.find(p => p.userData.path === path),
+    findSpritesByClusterAndExclude: (cluster, excludePath) => 
+      clusterParticles.filter(p => p.userData.cluster === cluster && p.userData.path !== excludePath)
   };
 }
 
@@ -696,13 +699,18 @@ function performQuantumMerge(keepSprite, deleteSprites) {
   // 3. After 3 seconds, trigger supernova
   setTimeout(() => {
     triggerSupernova(() => {
+      deleteSprites.forEach(sprite => {
+        scene.remove(sprite);
+        const index = clusterParticles.indexOf(sprite);
+        if (index > -1) clusterParticles.splice(index, 1);
+      });
+      
       console.log("Quantum merge complete!");
       window.dispatchEvent(new CustomEvent('quantum-merge-complete', {
         detail: { deleteSprites }
       }));
     });
   }, 3000);
-}
 
 // --- SEARCH VISUALIZATION ---
 function setupSearchEvents() {

app/static/script.js

@@ -473,10 +473,9 @@ document.getElementById("smart-cleanup-btn").onclick = async () => {
   if (!confirm(`Keep 1 and delete the rest of '${currentClusterName}'?`)) return;
 
   if (universeController && universeState.data.length > 0) {
-    const keepSprite = clusterParticles.find(p => p.userData.path === keepPath);
-    const deleteSprites = clusterParticles.filter(
-      p => p.userData.cluster === currentClusterName && p.userData.path !== keepPath
-    );
+    const keepSprite = universeController.findSpriteByPath(keepPath);
+    const deleteSprites = universeController.findSpritesByClusterAndExclude(currentClusterName, keepPath);
+
 
     if (keepSprite && deleteSprites.length > 0) {
       universeController.performQuantumMerge(keepSprite, deleteSprites);