NTE optimization guide: How to fix lag, stuttering, and low FPS

NTE optimization guide: **PC**: 1) Install on C drive/SSD — D drive causes severe stuttering; 2) Update GPU drivers; 3) Switch renderer (DX11/DX12/Vulkan) in settings; 4) Disable volumetric fog, screen space reflections; 5) Lower render resolution to 90%; 6) Clear ShaderCache folder. **Mobile**: 1) Lower render quality to Medium or Low; 2) Disable motion blur and volumetric lighting; 3) Set frame rate to 30 FPS to reduce heat; 4) Close background apps. **General**: Ensure 20GB+ free storage, use wired network for lower latency.