feat: add energy beam to Batcave terminal

app.js

@@ -1234,6 +1234,28 @@ window.addEventListener('resize', () => {
 
 // === SOVEREIGNTY METER ===
 
+// === BATCAVE TERMINAL ENERGY BEAM ===
+// Vertical energy beam from Batcave terminal area to the sky with animated opacity for a subtle pulse effect.
+const beamGeometry = new THREE.CylinderGeometry(0.2, 0.5, 50, 32);
+const beamMaterial = new THREE.MeshBasicMaterial({
+  color: NEXUS.colors.energy,
+  emissive: NEXUS.colors.energy,
+  emissiveIntensity: 0.8,
+  transparent: true,
+  opacity: 0.6
+});
+const energyBeam = new THREE.Mesh(beamGeometry, beamMaterial);
+energyBeam.position.set(-10, 25, -10); // Positioned at Batcave terminal area
+energyBeam.rotation.x = Math.PI / 2;
+NEXUS.scene.add(energyBeam);
+
+// Animate beam opacity for subtle pulse effect
+function animateBeam() {
+  beamMaterial.opacity = 0.6 + 0.2 * Math.sin(Date.now() * 0.002);
+  requestAnimationFrame(animateBeam);
+}
+animateBeam();
+
 // === BATCAVE TERMINAL ENERGY BEAM ===
 // Vertical energy beam representing connection between Timmy and the outside world
 const beamGeometry = new THREE.CylinderGeometry(0.2, 0.5, 100, 32);