SteamVR 2.18 adds Linux fixes, Steam Frame improvements and Aurora environment

Valve released the stable SteamVR 2.18 update with fixes across all supported platforms, including Steam Frame. It adds tethered USB streaming for Quest, fixes async reprojection on AMD GPUs and "Error 17", and makes Aurora the default environment.

• Added tethered USB streaming support for Quest
• Fixed async reprojection failures on AMD GPUs
• Aurora is now the default environment
• Fixed ~300ms frame gaps during packet loss