port 2A step 4: platform skeleton + rest of the 2V3 header closure

- Mirror the remaining non-Python 2V3 closure headers (98 more, 173 total): EffectLib,
  EterGrnLib, SpeedTreeLib, SphereLib, PRTerrainLib, EterImageLib, EterBase/Poly, cipher/tea,
  EterLib Grp*/IME/Input/MSWindow/StateManager, GameLib actor/map/race headers, EterPack.
- SDK shims: granny.h, SpeedTreeRT.h, imm.h, Dimm.h (the SDK MIDL header, not mirrored),
  dinput/d3dx8 additions; D3D8 render-state enums, FVF macros and the COM resource hierarchy;
  more Win32 GDI/handle types with layout static_asserts.
- PORT edits for MSVC-permissive code (typename, friend visibility, <algorithm>, pointer→uintptr_t)
  and PRTerrainLib/StdAfx.h dropping the ScriptLib/Python include.
- port_logic links the vendored cryptopp/minilzo.
- extension/src/platform: port_platform target with 103 generated stub files (1917 function
  stubs, 146 static members) from the new platform_stub.py (clang -ast-dump-filter);
  MT_PLATFORM_STUB() marks every unimplemented body. libmtgodot links port_platform and
  port_gate.sh builds it.

Gate: macOS, Android, iOS, Windows (mingw) PASS; Linux BLOCKED (no toolchain).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

extension/src/platform/EterLib/GrpDevice.cpp

@@ -0,0 +1,148 @@
+// Platform skeleton for EterLib/GrpDevice.h (40250 EterLib/GrpDevice.cpp), generated by platform_stub.py.
+// Every MT_PLATFORM_STUB() body is unimplemented: replace it with the platform implementation.
+#include "EterLib/StdAfx.h"
+#include "EterLib/GrpDevice.h"
+
+#include "../PlatformStub.h"
+
+CGraphicDevice::CGraphicDevice()
+{
+	MT_PLATFORM_STUB();
+}
+
+CGraphicDevice::~CGraphicDevice()
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::InitBackBufferCount(UINT) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::Destroy() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::Create(HWND, int, int, bool, int, int) -> int
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<int>();
+}
+
+auto CGraphicDevice::GetDeviceState() -> EDeviceState
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<EDeviceState>();
+}
+
+auto CGraphicDevice::Reset() -> bool
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<bool>();
+}
+
+auto CGraphicDevice::EnableWebBrowserMode(const RECT &) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::DisableWebBrowserMode() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::MoveWebBrowserRect(const RECT &) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::ResizeBackBuffer(UINT, UINT) -> bool
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<bool>();
+}
+
+auto CGraphicDevice::RegisterWarningString(UINT, const char *) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__Initialize() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__IsInDriverBlackList(D3D_CAdapterInfo &) -> bool
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<bool>();
+}
+
+auto CGraphicDevice::__WarningMessage(HWND, UINT) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__InitializeDefaultIndexBufferList() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__DestroyDefaultIndexBufferList() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__CreateDefaultIndexBufferList() -> bool
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<bool>();
+}
+
+auto CGraphicDevice::__CreateDefaultIndexBuffer(UINT, UINT, const WORD *) -> bool
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<bool>();
+}
+
+auto CGraphicDevice::__InitializePDTVertexBufferList() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__DestroyPDTVertexBufferList() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CGraphicDevice::__CreatePDTVertexBufferList() -> bool
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<bool>();
+}
+
+auto CGraphicDevice::CreatePTStreamVertexShader() -> DWORD
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<DWORD>();
+}
+
+auto CGraphicDevice::CreatePNTStreamVertexShader() -> DWORD
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<DWORD>();
+}
+
+auto CGraphicDevice::CreatePNT2StreamVertexShader() -> DWORD
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<DWORD>();
+}
+
+auto CGraphicDevice::CreateDoublePNTStreamVertexShader() -> DWORD
+{
+	MT_PLATFORM_STUB();
+	return mt_platform_stub_return<DWORD>();
+}