feat(visualizer): add multiple visualizers with mouse tracking and beat response

- Add BaseVisualizer class for shared visualizer logic
- Add Helix visualizer (DNA helix with rungs, beat compression/bounce)
- Add Tunnel visualizer (ring tunnel with depth parallax)
- Refactor SphereVisualizer to extend BaseVisualizer
- Add mouse tracking to all visualizers (canvas-relative, centered)
- Add visualizer switching via logo click (persisted to localStorage)
- Add beat-responsive bouncing and compression effects

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

assets/js/visualizer/base-visualizer.js

@@ -0,0 +1,90 @@
+/**
+ * Base Visualizer Class
+ * Abstract base for all audio visualizers
+ */
+
+import * as THREE from 'three';
+
+export class BaseVisualizer {
+  constructor(scene) {
+    this.scene = scene;
+    this.mesh = null;
+    this.isVisible = false;
+  }
+
+  /**
+   * Initialize geometry, materials, and mesh
+   * Override in subclasses
+   */
+  init() {
+    throw new Error('init() must be implemented by subclass');
+  }
+
+  /**
+   * Update visualizer with audio data
+   * @param {Object} bands - { low, mid, high } frequency bands (0-1)
+   * @param {number} time - Animation time
+   */
+  update(bands, time) {
+    throw new Error('update() must be implemented by subclass');
+  }
+
+  /**
+   * Add visualizer to scene
+   */
+  show() {
+    if (this.mesh && !this.isVisible) {
+      this.scene.add(this.mesh);
+      this.isVisible = true;
+    }
+  }
+
+  /**
+   * Remove visualizer from scene
+   */
+  hide() {
+    if (this.mesh && this.isVisible) {
+      this.scene.remove(this.mesh);
+      this.isVisible = false;
+    }
+  }
+
+  /**
+   * Cleanup resources
+   */
+  dispose() {
+    this.hide();
+    if (this.mesh) {
+      this.mesh.geometry?.dispose();
+      if (this.mesh.material) {
+        if (Array.isArray(this.mesh.material)) {
+          this.mesh.material.forEach(m => m.dispose());
+        } else {
+          this.mesh.material.dispose();
+        }
+      }
+    }
+  }
+
+  /**
+   * Helper: Create shader material with common settings
+   */
+  createShaderMaterial(vertexShader, fragmentShader, uniforms = {}) {
+    return new THREE.ShaderMaterial({
+      vertexShader,
+      fragmentShader,
+      uniforms: {
+        uTime: { value: 0 },
+        uLow: { value: 0 },
+        uMid: { value: 0 },
+        uHigh: { value: 0 },
+        ...uniforms
+      },
+      transparent: true,
+      blending: THREE.AdditiveBlending,
+      depthWrite: false
+    });
+  }
+}
+
+export default BaseVisualizer;

assets/js/visualizer/helix.js

@@ -0,0 +1,201 @@
+/**
+ * DNA Helix Visualizer
+ * Immersive multi-layered double helix that fills the screen
+ */
+
+import * as THREE from 'three';
+import { BaseVisualizer } from './base-visualizer.js';
+
+const vertexShader = `
+uniform float uTime;
+uniform float uLow;
+uniform float uMid;
+uniform float uHigh;
+uniform float uMouseX;
+uniform float uMouseY;
+
+attribute float aStrand;      // 0 or 1 for which strand
+attribute float aProgress;    // 0-1 position along helix
+attribute float aIsRung;      // 1 if this is a connecting rung particle
+attribute float aLayer;       // Which helix layer (0, 1, 2 for nested helixes)
+
+varying float vAlpha;
+varying float vStrand;
+varying float vLayer;
+
+void main() {
+  vec3 pos = position;
+
+  // Layer-based radius - nested helixes
+  float baseRadius = 8.0 + aLayer * 12.0;  // Inner: 8, Mid: 20, Outer: 32
+  float helixRadius = baseRadius + uLow * 6.0;  // Bass expands all layers
+  float helixHeight = 100.0 * (1.0 - uLow * 0.3);  // Compress with bass
+  float twists = 5.0 - aLayer * 1.0;  // Inner twists more
+
+  // Rotation speed - layers rotate at different speeds
+  float layerSpeed = 1.0 - aLayer * 0.2;
+  float rotationSpeed = (0.6 + uMid * 2.0) * layerSpeed;
+  float timeOffset = uTime * rotationSpeed;
+
+  // Reverse rotation for alternate layers
+  if (mod(aLayer, 2.0) > 0.5) {
+    timeOffset = -timeOffset;
+  }
+
+  // Calculate helix position
+  float t = aProgress;
+  float angle = t * twists * 6.28318 + timeOffset;
+
+  // Offset for second strand
+  if (aStrand > 0.5 && aIsRung < 0.5) {
+    angle += 3.14159;
+  }
+
+  // Base helix position - along Z-axis (viewer inside helix)
+  float x = cos(angle) * helixRadius;
+  float y = sin(angle) * helixRadius;
+  float z = (t - 0.5) * helixHeight;
+
+  // Rungs connect the two strands
+  if (aIsRung > 0.5) {
+    float rungAngle = t * twists * 6.28318 + timeOffset;
+    float rungT = fract(aStrand * 10.0);
+    float angle1 = rungAngle;
+    float angle2 = rungAngle + 3.14159;
+
+    x = mix(cos(angle1), cos(angle2), rungT) * helixRadius;
+    y = mix(sin(angle1), sin(angle2), rungT) * helixRadius;
+
+    // Rungs pulse dramatically with beat
+    float pulse = 1.0 + uLow * 0.5;
+    x *= pulse;
+    y *= pulse;
+  }
+
+  // High frequencies add jitter/scatter - more on outer layers
+  float jitterAmount = uHigh * (3.0 + aLayer * 2.0);
+  x += sin(t * 40.0 + uTime * 8.0 + aLayer) * jitterAmount;
+  y += cos(t * 40.0 + uTime * 8.0) * jitterAmount * 0.5;
+  z += sin(t * 40.0 + uTime * 8.0 + 1.57 + aLayer) * jitterAmount;
+
+  // Mouse offset - helix follows mouse position subtly
+  x -= uMouseX * 1.0;
+  y -= uMouseY * 0.7;
+
+  // Bounce toward viewer with bass
+  z += uLow * 10.0;
+
+  pos = vec3(x, y, z);
+
+  vec4 mvPosition = modelViewMatrix * vec4(pos, 1.0);
+
+  // Point size - larger for outer layers
+  float size = 3.0 + aLayer * 1.0;
+  if (aIsRung > 0.5) {
+    size = 2.0 + uLow * 1.5;
+  }
+  size *= (1.0 + uLow * 0.3);
+  gl_PointSize = size * (300.0 / -mvPosition.z);
+
+  // Alpha - outer layers slightly more transparent
+  vAlpha = 0.8 - aLayer * 0.1 + uLow * 0.2;
+  if (aIsRung > 0.5) {
+    vAlpha *= 0.7;
+  }
+
+  vStrand = aStrand;
+  vLayer = aLayer;
+
+  gl_Position = projectionMatrix * mvPosition;
+}
+`;
+
+const fragmentShader = `
+varying float vAlpha;
+varying float vStrand;
+varying float vLayer;
+
+void main() {
+  float dist = length(gl_PointCoord - vec2(0.5));
+  if (dist > 0.5) discard;
+
+  float alpha = 1.0 - smoothstep(0.1, 0.5, dist);
+  alpha *= vAlpha;
+
+  // Pure white
+  vec3 color = vec3(1.0);
+
+  gl_FragColor = vec4(color, alpha);
+}
+`;
+
+export class HelixVisualizer extends BaseVisualizer {
+  static name = 'Helix';
+
+  constructor(scene) {
+    super(scene);
+    this.particlesPerStrand = 400;
+    this.rungsCount = 60;
+    this.layers = 1;  // Single helix
+    this.init();
+  }
+
+  init() {
+    const rungsPerLayer = this.rungsCount;
+    const particlesPerRung = 15;
+
+    const totalParticles = this.layers * rungsPerLayer * particlesPerRung;
+
+    const positions = new Float32Array(totalParticles * 3);
+    const strands = new Float32Array(totalParticles);
+    const progress = new Float32Array(totalParticles);
+    const isRung = new Float32Array(totalParticles);
+    const layers = new Float32Array(totalParticles);
+
+    let idx = 0;
+
+    for (let layer = 0; layer < this.layers; layer++) {
+      // Rungs only (connecting particles between strands)
+      for (let r = 0; r < rungsPerLayer; r++) {
+        const rungProgress = r / rungsPerLayer;
+
+        for (let p = 0; p < particlesPerRung; p++) {
+          positions[idx * 3] = 0;
+          positions[idx * 3 + 1] = 0;
+          positions[idx * 3 + 2] = 0;
+          strands[idx] = p / (particlesPerRung - 1);
+          progress[idx] = rungProgress;
+          isRung[idx] = 1;
+          layers[idx] = layer;
+          idx++;
+        }
+      }
+    }
+
+    const geometry = new THREE.BufferGeometry();
+    geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
+    geometry.setAttribute('aStrand', new THREE.BufferAttribute(strands, 1));
+    geometry.setAttribute('aProgress', new THREE.BufferAttribute(progress, 1));
+    geometry.setAttribute('aIsRung', new THREE.BufferAttribute(isRung, 1));
+    geometry.setAttribute('aLayer', new THREE.BufferAttribute(layers, 1));
+
+    this.material = this.createShaderMaterial(vertexShader, fragmentShader, {
+      uMouseX: { value: 0 },
+      uMouseY: { value: 0 }
+    });
+    this.mesh = new THREE.Points(geometry, this.material);
+  }
+
+  update(bands, time, mouse = { x: 0, y: 0 }) {
+    if (!this.material) return;
+
+    this.material.uniforms.uTime.value = time;
+    this.material.uniforms.uLow.value = bands.low || 0;
+    this.material.uniforms.uMid.value = bands.mid || 0;
+    this.material.uniforms.uHigh.value = bands.high || 0;
+    this.material.uniforms.uMouseX.value = mouse.x;
+    this.material.uniforms.uMouseY.value = mouse.y;
+  }
+}
+
+export default HelixVisualizer;

assets/js/visualizer/particles.js

@@ -1,17 +1,19 @@
 /**
- * Particle System
+ * Particle System (Sphere) Visualizer
  * Audio-reactive 3D particle cloud
  */
 
 import * as THREE from 'three';
+import { BaseVisualizer } from './base-visualizer.js';
 
-// Vertex Shader
 const vertexShader = `
 uniform float uTime;
 uniform float uLow;
 uniform float uMid;
 uniform float uHigh;
 uniform float uSize;
+uniform float uMouseX;
+uniform float uMouseY;
 
 attribute float aRandom;
 attribute float aScale;
@@ -42,6 +44,10 @@ void main() {
   vec3 jitter = normalize(pos) * uHigh * aRandom * 5.0;
   pos += jitter;
 
+  // Mouse offset
+  pos.x -= uMouseX * 3.0;
+  pos.y -= uMouseY * 2.0;
+
   // Calculate view position
   vec4 mvPosition = modelViewMatrix * vec4(pos, 1.0);
 
@@ -57,7 +63,6 @@ void main() {
 }
 `;
 
-// Fragment Shader
 const fragmentShader = `
 varying float vAlpha;
 
@@ -74,17 +79,16 @@ void main() {
 }
 `;
 
-export class ParticleSystem {
-  constructor(count = 5000) {
+export class SphereVisualizer extends BaseVisualizer {
+  static name = 'Sphere';
+
+  constructor(scene, count = 5000) {
+    super(scene);
     this.count = count;
-    this.createGeometry();
-    this.createMaterial();
-    this.mesh = new THREE.Points(this.geometry, this.material);
+    this.init();
   }
 
-  createGeometry() {
-    this.geometry = new THREE.BufferGeometry();
-
+  init() {
     const positions = new Float32Array(this.count * 3);
     const randoms = new Float32Array(this.count);
     const scales = new Float32Array(this.count);
@@ -105,41 +109,37 @@ export class ParticleSystem {
       scales[i] = 0.5 + Math.random() * 1.5;
     }
 
-    this.geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
-    this.geometry.setAttribute('aRandom', new THREE.BufferAttribute(randoms, 1));
-    this.geometry.setAttribute('aScale', new THREE.BufferAttribute(scales, 1));
-  }
+    const geometry = new THREE.BufferGeometry();
+    geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
+    geometry.setAttribute('aRandom', new THREE.BufferAttribute(randoms, 1));
+    geometry.setAttribute('aScale', new THREE.BufferAttribute(scales, 1));
 
-  createMaterial() {
-    this.material = new THREE.ShaderMaterial({
-      vertexShader,
-      fragmentShader,
-      uniforms: {
-        uTime: { value: 0 },
-        uLow: { value: 0 },
-        uMid: { value: 0 },
-        uHigh: { value: 0 },
-        uSize: { value: 2.0 }
-      },
-      transparent: true,
-      blending: THREE.AdditiveBlending,
-      depthWrite: false
+    this.material = this.createShaderMaterial(vertexShader, fragmentShader, {
+      uSize: { value: 2.0 },
+      uMouseX: { value: 0 },
+      uMouseY: { value: 0 }
     });
+
+    this.mesh = new THREE.Points(geometry, this.material);
   }
 
-  update(bands, time) {
+  update(bands, time, mouse = { x: 0, y: 0 }) {
     if (!this.material) return;
 
     this.material.uniforms.uTime.value = time;
     this.material.uniforms.uLow.value = bands.low || 0;
     this.material.uniforms.uMid.value = bands.mid || 0;
     this.material.uniforms.uHigh.value = bands.high || 0;
-  }
-
-  dispose() {
-    this.geometry?.dispose();
-    this.material?.dispose();
+    this.material.uniforms.uMouseX.value = mouse.x;
+    this.material.uniforms.uMouseY.value = mouse.y;
   }
 }
 
-export default ParticleSystem;
+// Legacy export for backwards compatibility
+export class ParticleSystem extends SphereVisualizer {
+  constructor(count = 5000) {
+    super(null, count);
+  }
+}
+
+export default SphereVisualizer;

assets/js/visualizer/scene.js

@@ -1,10 +1,19 @@
 /**
  * WebGL Visualizer Scene
- * Three.js particle system that reacts to audio frequency data
+ * Three.js scene manager with multiple selectable visualizers
  */
 
 import * as THREE from 'three';
-import { ParticleSystem } from './particles.js';
+import { SphereVisualizer } from './particles.js';
+import { TunnelVisualizer } from './tunnel.js';
+import { HelixVisualizer } from './helix.js';
+
+// Available visualizer classes
+const VISUALIZERS = [
+  SphereVisualizer,
+  TunnelVisualizer,
+  HelixVisualizer
+];
 
 export class Visualizer {
   constructor(canvas, audioManager) {
@@ -13,6 +22,14 @@ export class Visualizer {
     this.running = false;
     this.time = 0;
 
+    // Mouse tracking (normalized -1 to 1)
+    this.mouse = { x: 0, y: 0 };
+    this.mouseActive = false;
+
+    // Visualizer management
+    this.visualizers = [];
+    this.currentIndex = 0;
+
     if (!canvas) {
       console.warn('Visualizer: No canvas provided');
       return;
@@ -44,17 +61,93 @@ export class Visualizer {
     this.renderer.setSize(window.innerWidth, window.innerHeight);
     this.renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
 
-    // Particles
-    this.particles = new ParticleSystem(5000);
-    this.scene.add(this.particles.mesh);
+    // Initialize all visualizers
+    this.visualizers = VISUALIZERS.map(VisualizerClass => {
+      return new VisualizerClass(this.scene);
+    });
+
+    // Load saved visualizer preference
+    const savedIndex = localStorage.getItem('pivoine-visualizer');
+    if (savedIndex !== null) {
+      this.currentIndex = parseInt(savedIndex, 10) % this.visualizers.length;
+    }
+
+    // Show the current visualizer
+    this.visualizers[this.currentIndex].show();
 
     // Event listeners
     window.addEventListener('resize', () => this.resize());
+    window.addEventListener('mousemove', (e) => this.onMouseMove(e));
 
     // Start animation
     this.start();
   }
 
+  /**
+   * Get list of visualizer names
+   */
+  getVisualizerNames() {
+    return VISUALIZERS.map(V => V.name);
+  }
+
+  /**
+   * Get current visualizer name
+   */
+  getCurrentName() {
+    return VISUALIZERS[this.currentIndex].name;
+  }
+
+  /**
+   * Get current visualizer index
+   */
+  getCurrentIndex() {
+    return this.currentIndex;
+  }
+
+  /**
+   * Set active visualizer by index
+   */
+  setVisualizer(index) {
+    if (index < 0 || index >= this.visualizers.length) return;
+    if (index === this.currentIndex) return;
+
+    // Hide current
+    this.visualizers[this.currentIndex].hide();
+
+    // Show new
+    this.currentIndex = index;
+    this.visualizers[this.currentIndex].show();
+
+    // Save preference
+    localStorage.setItem('pivoine-visualizer', index.toString());
+  }
+
+  /**
+   * Cycle to next visualizer
+   */
+  nextVisualizer() {
+    const nextIndex = (this.currentIndex + 1) % this.visualizers.length;
+    this.setVisualizer(nextIndex);
+    return this.getCurrentName();
+  }
+
+  /**
+   * Cycle to previous visualizer
+   */
+  prevVisualizer() {
+    const prevIndex = (this.currentIndex - 1 + this.visualizers.length) % this.visualizers.length;
+    this.setVisualizer(prevIndex);
+    return this.getCurrentName();
+  }
+
+  onMouseMove(e) {
+    // Normalize to -1 to 1 relative to canvas
+    const rect = this.canvas.getBoundingClientRect();
+    this.mouse.x = ((e.clientX - rect.left) / rect.width) * 2 - 1;
+    this.mouse.y = -((e.clientY - rect.top) / rect.height) * 2 + 1;
+    this.mouseActive = true;
+  }
+
   resize() {
     if (!this.camera || !this.renderer) return;
 
@@ -89,8 +182,12 @@ export class Visualizer {
       bands = this.audioManager.getFrequencyBands();
     }
 
-    // Update particles with audio data
-    this.particles.update(bands, this.time);
+    // Update current visualizer with audio data and mouse position
+    const currentViz = this.visualizers[this.currentIndex];
+    if (currentViz) {
+      const mouse = this.mouseActive ? this.mouse : { x: 0, y: 0 };
+      currentViz.update(bands, this.time, mouse);
+    }
 
     // Subtle camera movement
     this.camera.position.x = Math.sin(this.time * 0.1) * 3;
@@ -102,7 +199,7 @@ export class Visualizer {
 
   destroy() {
     this.running = false;
-    this.particles?.dispose();
+    this.visualizers.forEach(v => v.dispose());
     this.renderer?.dispose();
   }
 }

assets/js/visualizer/tunnel.js

@@ -0,0 +1,146 @@
+/**
+ * Waveform Tunnel Visualizer
+ * Infinite tunnel of pulsing rings
+ */
+
+import * as THREE from 'three';
+import { BaseVisualizer } from './base-visualizer.js';
+
+const vertexShader = `
+uniform float uTime;
+uniform float uLow;
+uniform float uMid;
+uniform float uHigh;
+uniform float uMouseX;
+uniform float uMouseY;
+
+attribute float aRingIndex;
+attribute float aAngle;
+
+varying float vAlpha;
+varying float vRingIndex;
+
+void main() {
+  vec3 pos = position;
+
+  // Ring depth position (z movement for tunnel effect)
+  float depth = mod(pos.z + uTime * 12.0, 200.0) - 100.0;
+  pos.z = depth;
+
+  // Distance from camera affects ring behavior
+  float depthFactor = 1.0 - (depth + 100.0) / 200.0;
+
+  // Bass expands rings - stronger pulse
+  float bassExpand = 1.0 + uLow * 0.8 * depthFactor;
+  pos.x *= bassExpand;
+  pos.y *= bassExpand;
+
+  // Bounce toward viewer on bass
+  pos.z += uLow * 15.0;
+
+  // Mid creates wave distortion on ring
+  float wave = sin(aAngle * 4.0 + uTime * 3.0) * uMid * 2.0 * depthFactor;
+  float waveRadius = 1.0 + wave * 0.3;
+  pos.x *= waveRadius;
+  pos.y *= waveRadius;
+
+  // High adds subtle jitter
+  pos.x += sin(aAngle * 8.0 + uTime * 5.0) * uHigh * 0.5;
+  pos.y += cos(aAngle * 8.0 + uTime * 5.0) * uHigh * 0.5;
+
+  // Mouse offset - stronger for closer rings
+  pos.x -= uMouseX * 5.0 * depthFactor;
+  pos.y -= uMouseY * 4.0 * depthFactor;
+
+  vec4 mvPosition = modelViewMatrix * vec4(pos, 1.0);
+
+  // Point size based on depth - larger for more coverage
+  float size = 4.5 * (1.0 + uLow * 0.4);
+  gl_PointSize = size * (250.0 / -mvPosition.z);
+
+  // Alpha fades with depth
+  vAlpha = 0.8 * depthFactor + uHigh * 0.2;
+  vRingIndex = aRingIndex;
+
+  gl_Position = projectionMatrix * mvPosition;
+}
+`;
+
+const fragmentShader = `
+varying float vAlpha;
+varying float vRingIndex;
+
+void main() {
+  float dist = length(gl_PointCoord - vec2(0.5));
+  if (dist > 0.5) discard;
+
+  float alpha = 1.0 - smoothstep(0.1, 0.5, dist);
+  alpha *= vAlpha;
+
+  // Slight color variation based on ring
+  vec3 color = vec3(1.0, 1.0, 1.0);
+
+  gl_FragColor = vec4(color, alpha);
+}
+`;
+
+export class TunnelVisualizer extends BaseVisualizer {
+  static name = 'Tunnel';
+
+  constructor(scene) {
+    super(scene);
+    this.ringCount = 100;
+    this.pointsPerRing = 128;
+    this.init();
+  }
+
+  init() {
+    const totalPoints = this.ringCount * this.pointsPerRing;
+    const positions = new Float32Array(totalPoints * 3);
+    const ringIndices = new Float32Array(totalPoints);
+    const angles = new Float32Array(totalPoints);
+
+    let idx = 0;
+    for (let ring = 0; ring < this.ringCount; ring++) {
+      const z = (ring / this.ringCount) * 200 - 100; // -100 to 100
+      const radius = 28 + Math.sin(ring * 0.25) * 5; // Larger varying radius
+
+      for (let p = 0; p < this.pointsPerRing; p++) {
+        const angle = (p / this.pointsPerRing) * Math.PI * 2;
+
+        positions[idx * 3] = Math.cos(angle) * radius;
+        positions[idx * 3 + 1] = Math.sin(angle) * radius;
+        positions[idx * 3 + 2] = z;
+
+        ringIndices[idx] = ring / this.ringCount;
+        angles[idx] = angle;
+
+        idx++;
+      }
+    }
+
+    const geometry = new THREE.BufferGeometry();
+    geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
+    geometry.setAttribute('aRingIndex', new THREE.BufferAttribute(ringIndices, 1));
+    geometry.setAttribute('aAngle', new THREE.BufferAttribute(angles, 1));
+
+    this.material = this.createShaderMaterial(vertexShader, fragmentShader, {
+      uMouseX: { value: 0 },
+      uMouseY: { value: 0 }
+    });
+    this.mesh = new THREE.Points(geometry, this.material);
+  }
+
+  update(bands, time, mouse = { x: 0, y: 0 }) {
+    if (!this.material) return;
+
+    this.material.uniforms.uTime.value = time;
+    this.material.uniforms.uLow.value = bands.low || 0;
+    this.material.uniforms.uMid.value = bands.mid || 0;
+    this.material.uniforms.uHigh.value = bands.high || 0;
+    this.material.uniforms.uMouseX.value = mouse.x;
+    this.material.uniforms.uMouseY.value = mouse.y;
+  }
+}
+
+export default TunnelVisualizer;

config/_default/params.toml

@@ -1,4 +1,4 @@
-description = "Valknar's audio"
+description = "Valknar's Pivoine.Art"
 author = "Valknar"
 email = "valknar@pivoine.art"
 

content/_index.md

@@ -1,4 +1,4 @@
 ---
 title: "Valknar's"
-description: "Valknar's audio"
+description: "Valknar's Pivoine.Art"
 ---

layouts/_default/baseof.html

@@ -64,6 +64,18 @@
 
       // Player UI component
       Alpine.data('playerUI', () => ({
+        visualizerName: 'Sphere',
+
+        init() {
+          // Get initial visualizer name
+          this.$nextTick(() => {
+            const viz = window.__pivoine?.visualizer;
+            if (viz) {
+              this.visualizerName = viz.getCurrentName() || 'Sphere';
+            }
+          });
+        },
+
         togglePlay() {
           window.__pivoine?.audioManager?.toggle();
         },
@@ -85,6 +97,12 @@
             this.setVolume(this._previousVolume || 0.8);
           }
         },
+        cycleVisualizer() {
+          const viz = window.__pivoine?.visualizer;
+          if (viz) {
+            this.visualizerName = viz.nextVisualizer();
+          }
+        },
         formatTime(seconds) {
           if (!seconds || isNaN(seconds)) return '0:00';
           const mins = Math.floor(seconds / 60);

layouts/partials/header.html

@@ -1,23 +1,25 @@
 <header class="fixed top-0 left-0 right-0 z-sticky bg-surface-0/80 backdrop-blur-md border-b border-border">
   <nav class="container-wide flex items-center justify-between h-16">
     {{/* Logo */}}
-    <a
-      href="{{ "/" | relURL }}"
-      class="flex items-center gap-3 group"
-      aria-label="{{ .Site.Title }} - Home"
-    >
+    <div class="flex items-center gap-3 group">
       <canvas
         id="logo-canvas"
         hx-preserve="true"
-        class="w-8 h-8"
+        class="w-8 h-8 cursor-pointer"
         width="32"
         height="32"
         aria-hidden="true"
+        @click="window.__pivoine?.visualizer?.nextVisualizer()"
+        title="Click to change visualizer"
       ></canvas>
-      <span class="text-lg font-medium tracking-tight group-hover:text-accent transition-colors">
+      <a
+        href="{{ "/" | relURL }}"
+        class="text-lg font-medium tracking-tight group-hover:text-accent transition-colors"
+        aria-label="{{ .Site.Title }} - Home"
+      >
         VALKNAR'S
-      </span>
-    </a>
+      </a>
+    </div>
 
     {{/* Navigation */}}
     <ul