⚡ Optimize MicrotubuleTorus rendering with InstancedMesh

[jason420247]

💡 What: The optimization replaces individual <mesh> components with a single <instancedMesh> for the MicrotubuleTorus component. It pre-calculates positions using useMemo and updates instance matrices in the useFrame loop using a reusable THREE.Object3D instance.

🎯 Why: Rendering hundreds or thousands of individual meshes is computationally expensive due to the high number of draw calls (one per mesh). Instancing allows the GPU to render many identical geometries in a single draw call, significantly improving frame rates and reducing CPU overhead.

📊 Measured Improvement:

• Draw Calls: Reduced from ~1082 (360 + 720 cubes + lights) to ~4 (1 per torus + lights).
• CPU/Memory: The use of a single tempObject for matrix calculations minimizes garbage collection overhead during animation frames.
• Robustness: Added key={count} to handle dynamic instance count changes safely.

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PR created automatically by Jules for task 16037118529389045494 started by @jason420247

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