- Removed CPU option from driver selection (only CUDA/ROCm GPU drivers)
- Set CUDA as default driver selection when available
- Added available_gpu_backends field to node API responses
- Frontend dynamically populates driver options based on node's available GPUs
- API validation rejects non-GPU driver requests
- Cluster clients only accept CUDA/ROCm backend restart commands
- Improved user experience by showing only relevant driver options per node