功能：补充固定场景助手与GPU健康诊断能力

platform/internal/server/exclusive_gpu_test.go

@@ -119,6 +119,23 @@ func TestExclusiveGPUAuthorizationAndOccupiedGroup(t *testing.T) {
 	}
 }
 
+func TestExclusiveGPUStatusPreflightIsReadOnly(t *testing.T) {
+	f, p := exclusiveFixture(t, "normal")
+	admin := f.login("admin")
+	code, out := f.request("GET", "/resources/gpu-exclusive?node=gpu-node", admin, nil, "")
+	expect(t, 200, code, out)
+	if out["enabled"] != true || out["groupComplete"] != true || out["allocationReady"] != false || out["releaseReady"] != false {
+		t.Fatalf("unexpected preflight: %#v", out)
+	}
+	if len(p.actions) != 0 {
+		t.Fatalf("preflight changed power: %#v", p.actions)
+	}
+	code, _ = f.request("POST", "/resources/gpu-exclusive", admin, nil, "")
+	if code != 404 {
+		t.Fatalf("exclusive GPU status unexpectedly exposes write route: %d", code)
+	}
+}
+
 func TestExclusiveGPUReservationBlocksAdministrativePower(t *testing.T) {
 	f, p := exclusiveFixture(t, "normal")
 	prepareExclusive(t, f)