Our furniture product pages feel flat with static photos. We need a web-based 3D configurator where the product stays front and center: shoppers can spin it 360°, zoom into details, and swap materials—wood species, fabric colors, and metal finishes—with instant visual feedback and price recalculation. Material changes should update the model’s textures in real time. Keep the surrounding UI minimal and intuitive. Track selections in a central state so we can generate a final configuration summary and add it to the cart. Prefer SvelteKit for the app and Three.js for the viewer, but keep the architecture simple and robust.