Configures vite-plugin-static-copy to serve @ricky0123/vad-web's ONNX model,
audio worklet, and onnxruntime-web WASM files from the site root.
useOnnxPreloader warms the model cache during page idle so the first mic
click is instant.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
