fix(stress): label loaders and improve john opencl diagnostics

audit/internal/webui/tasks_test.go

@@ -95,6 +95,23 @@ func TestResolveBurnPreset(t *testing.T) {
 	}
 }
 
+func TestTaskDisplayNameUsesNvidiaStressLoader(t *testing.T) {
+	tests := []struct {
+		loader string
+		want   string
+	}{
+		{loader: "", want: "NVIDIA GPU Stress (bee-gpu-burn)"},
+		{loader: "builtin", want: "NVIDIA GPU Stress (bee-gpu-burn)"},
+		{loader: "john", want: "NVIDIA GPU Stress (John/OpenCL)"},
+		{loader: "nccl", want: "NVIDIA GPU Stress (NCCL)"},
+	}
+	for _, tc := range tests {
+		if got := taskDisplayName("nvidia-stress", "acceptance", tc.loader); got != tc.want {
+			t.Fatalf("taskDisplayName(loader=%q)=%q want %q", tc.loader, got, tc.want)
+		}
+	}
+}
+
 func TestRunTaskHonorsCancel(t *testing.T) {
 	t.Parallel()