[grok] Energy beam connecting Batcave terminal to the sky (#86) (#370)

app.js

@@ -1341,6 +1341,30 @@ const energyBeamMaterial = new THREE.MeshBasicMaterial({
 const energyBeam = new THREE.Mesh(energyBeamGeometry, energyBeamMaterial);
 energyBeam.position.set(ENERGY_BEAM_X, ENERGY_BEAM_Y + ENERGY_BEAM_HEIGHT / 2, ENERGY_BEAM_Z);
 scene.add(energyBeam);
+    // Energy beam from Batcave terminal to sky - connection to outside world
+    const beamGeometry = new THREE.CylinderGeometry(0.5, 2, 1000, 32, 32, true);
+    const beamMaterial = new THREE.MeshBasicMaterial({
+      color: NEXUS.colors.accent,
+      emissive: NEXUS.colors.accent,
+      emissiveIntensity: 0.8,
+      opacity: 0.6,
+      transparent: true,
+      side: THREE.BackSide
+    });
+    const energyBeam = new THREE.Mesh(beamGeometry, beamMaterial);
+    energyBeam.position.set(-50, 500, -50); // Centered above Batcave terminal area
+    energyBeam.rotation.x = Math.PI / 2;
+    NEXUS.scene.add(energyBeam);
+    NEXUS.animations.push({
+      object: energyBeam,
+      property: 'material.opacity',
+      start: 0.3,
+      end: 0.6,
+      duration: 2000,
+      ease: 'Quadratic.InOut',
+      loop: true,
+      yoyo: true
+    });
 
 // === RUNE RING ===
 // 12 Elder Futhark rune sprites in a slow-orbiting ring around the center platform.