Interactive Chinese Courtyard 3D Scene

Build an interactive Chinese courtyard using Blender and Three.js that I can explore in a browser. Include white walls, dark tiled roofs, a moon gate, pine trees, a pond, and a rock garden, with a living room, tea room, and bedroom. Use Python to run Blender in the background, generate the models, and export GLB files. Use Three.js for lighting, reflections, animation, and interaction. Support orbit controls, zoom, WASD navigation, day/night switching, and a roof toggle. Gradually add flowing water, koi, hopping frogs, dragonflies, a courtyard cat, sparrows, and nighttime fireflies. Keep movements subtle and natural. Create an original interface that leaves the scene unobstructed. Build in stages, inspect the results in the browser, fix issues, and deliver the runnable project, source files, and setup instructions.