feat: implement glowing memory orbs and fix portal duplication bug

app.js

@@ -3129,3 +3129,20 @@ init().then(() => {
   connectMemPalace();
   mineMemPalaceContent();
 });
+
+// Project Mnemosyne — Holographic Memory
+function spawnMemoryOrb(position, color = 0x4af0c0, size = 0.5) {
+    const geometry = new THREE.SphereGeometry(size, 32, 32);
+    const material = new THREE.MeshPhongMaterial({
+        color: color,
+        emissive: color,
+        emissiveIntensity: 2,
+        transparent: true,
+        opacity: 0.8,
+        shininess: 100
+    });
+    const orb = new THREE.Mesh(geometry, material);
+    orb.position.copy(position);
+    orb.userData.pulse = 0;
+    return orb;
+}

frontend/js/scene-objects.js

@@ -503,6 +503,11 @@ export function getSceneObjectCount() {
 export function addPortal(def) {
   if (!scene || !def.id) return false;
 
+  // Remove existing portal if it already exists to prevent duplication
+  if (registry.has(def.id)) {
+    removePortal(def.id);
+  }
+
   const color = def.color != null ? parseColor(def.color) : 0x00ffaa;
   const s = def.scale ?? 1;
   const group = new THREE.Group();

frontend/js/websocket.js

@@ -193,9 +193,13 @@ function handleMemoryEvent(msg) {
         geometry: 'sphere',
         position: { x: pos.x + (Math.random() - 0.5) * 5, y: 1, z: pos.z + (Math.random() - 0.5) * 5 },
         material: { 
+          type: 'physical',
           color: categoryColors[data.category] || 0xcccccc,
           emissive: categoryColors[data.category] || 0xcccccc,
-          emissiveIntensity: 2,
+          emissiveIntensity: 3,
+          transmission: 0.6,
+          roughness: 0.1,
+          metalness: 0.1,
           opacity: 0.8,
         },
         scale: 0.2 + (data.trust_score || 0.5) * 0.5,