fix: complete hardware collection diagnostics

audit/internal/platform/nvidia_config_check.go

@@ -43,6 +43,9 @@ func (s *System) RunNvidiaConfigCheckPack(ctx context.Context, baseDir string, l
 	if settings, err := s.ListNvidiaGPUSettings(); err != nil {
 		status.Notes = append(status.Notes, "nvidia-smi GPU settings unavailable (no driver, or no GPU present): "+err.Error())
 	} else {
+		if len(settings) == 0 {
+			status.NoGPUs = true
+		}
 		for _, g := range settings {
 			f := NvidiaGPUConfigFinding{
 				Index: g.Index, Name: g.Name,
@@ -127,6 +130,7 @@ type NvidiaConfigCheckStatus struct {
 
 	GPUs        []NvidiaGPUConfigFinding  `json:"gpus,omitempty"`
 	NVLinkPairs []NvidiaNVLinkPairFinding `json:"nvlink_pairs,omitempty"`
+	NoGPUs      bool                      `json:"no_gpus"`
 
 	// Confidential Computing readiness — informational only, does not gate
 	// overall_status: an unconfigured/NOT_READY CC state is a
@@ -466,7 +470,10 @@ func renderNvidiaConfigCheckSummary(status NvidiaConfigCheckStatus) string {
 	fmt.Fprintf(&b, "cc_state=%s\n", status.CCState)
 	fmt.Fprintf(&b, "cpu_cc_capability=%s\n", status.CPUCCCapability)
 	fmt.Fprintf(&b, "gpu_cc_capability=%s\n", status.GPUCCCapability)
-	if len(status.Warnings) == 0 {
+	if status.NoGPUs {
+		fmt.Fprintln(&b, "overall_status=UNSUPPORTED")
+		fmt.Fprintln(&b, "reason=no_nvidia_gpus_detected")
+	} else if len(status.Warnings) == 0 {
 		fmt.Fprintln(&b, "overall_status=OK")
 	} else {
 		fmt.Fprintln(&b, "overall_status=FAILED")