fix(rhi): align empty pipeline layout contract

engine/src/RHI/D3D12/D3D12Device.cpp

@@ -155,7 +155,7 @@ void D3D12Device::Shutdown() {
 bool D3D12Device::CreateDXGIFactory(bool enableDebugLayer) {
     UINT dxgiFactoryFlags = 0;
 
-    {
+    if (enableDebugLayer) {
         ID3D12Debug* debugController = nullptr;
         if (SUCCEEDED(D3D12GetDebugInterface(IID_PPV_ARGS(&debugController)))) {
             debugController->EnableDebugLayer();

engine/src/RHI/D3D12/D3D12PipelineLayout.cpp

@@ -72,12 +72,8 @@ bool D3D12PipelineLayout::InitializeInternal(D3D12Device* device, const RHIPipel
         rootIndex++;
     }
 
-    if (m_rootParameters.empty()) {
-        return false;
-    }
-
     D3D12_ROOT_SIGNATURE_DESC rootSigDesc = D3D12RootSignature::CreateDesc(
-        m_rootParameters.data(),
+        m_rootParameters.empty() ? nullptr : m_rootParameters.data(),
         static_cast<uint32_t>(m_rootParameters.size()),
         nullptr, 0,
         D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT);