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/port/common/shim/sdk/SpeedTreeRT.h

@@ -0,0 +1,21 @@
+#pragma once
+// Shim for IDV SpeedTreeRT <SpeedTreeRT.h> (40250 extern/include): the CSpeedTreeRT members that
+// SpeedTreeLib headers name. Tree geometry and wind go through platform/, which defines them.
+
+class CSpeedTreeRT
+{
+public:
+	enum ECollisionObjectType
+	{
+		CO_SPHERE,
+		CO_CYLINDER,
+		CO_BOX
+	};
+
+	struct SGeometry;
+	struct STextures;
+
+	float GetLeafLightingAdjustment() const;
+	float SetWindStrength(float fNewStrength, float fOldStrength = -1.0f, float fFrequencyTimeOffset = -1.0f);
+	void GetCollisionObject(unsigned int nIndex, ECollisionObjectType& eType, float* pPosition, float* pDimensions);
+};

extension/src/port/common/shim/sdk/d3d8.h

@@ -1,4 +1,5 @@
 #pragma once
 // Shim for <d3d8.h>: the D3D8 value types 40250 logic uses as data. Rendering goes through
-// platform/, never through these declarations.
+// platform/, never through these declarations. The real header pulls in <string.h> (objbase.h).
+#include <string.h>
 #include "../../D3DXMath.h"

extension/src/port/common/shim/sdk/granny.h

@@ -0,0 +1,70 @@
+#pragma once
+// Shim for RAD Granny 2.11 <granny.h> (40250 extern/include): the scalar types and structs that
+// EterGrnLib headers name, with the SDK's layout; every other Granny object is opaque. Loading and
+// skinning go through platform/ (backed by libgr2), never through these declarations.
+#include <stdint.h>
+
+typedef uint32_t granny_uint32;
+typedef int32_t granny_int32;
+typedef uint16_t granny_uint16;
+typedef int16_t granny_int16;
+typedef uint8_t granny_uint8;
+typedef int8_t granny_int8;
+typedef float granny_real32;
+typedef granny_uint32 granny_bool32;
+typedef uintptr_t granny_uintaddrx;
+typedef granny_real32 granny_triple[3];
+typedef granny_real32 granny_quad[4];
+
+typedef enum granny_member_type
+{
+	GrannyEndMember,
+	GrannyInlineMember,
+	GrannyReferenceMember,
+	GrannyReferenceToArrayMember,
+	GrannyArrayOfReferencesMember,
+	GrannyVariantReferenceMember,
+	GrannyUnsupportedMemberType_Remove,
+	GrannyReferenceToVariantArrayMember,
+	GrannyStringMember,
+	GrannyTransformMember,
+	GrannyReal32Member,
+	GrannyInt8Member,
+	GrannyUInt8Member,
+	GrannyBinormalInt8Member,
+	GrannyNormalUInt8Member,
+	GrannyInt16Member,
+	GrannyUInt16Member,
+	GrannyBinormalInt16Member,
+	GrannyNormalUInt16Member,
+	GrannyInt32Member,
+	GrannyUInt32Member,
+	GrannyReal16Member,
+	GrannyEmptyReferenceMember,
+	GrannyOnePastLastMemberType,
+	GrannyBool32Member = GrannyInt32Member,
+	Grannymember_type_forceint = 0x7fffffff
+} granny_member_type;
+
+struct granny_data_type_definition
+{
+	granny_member_type Type;
+	char const* Name;
+	granny_data_type_definition* ReferenceType;
+	granny_int32 ArrayWidth;
+	granny_int32 Extra[3];
+	granny_uintaddrx Ignored_Ignored;
+};
+
+struct granny_animation;
+struct granny_control;
+struct granny_file;
+struct granny_file_info;
+struct granny_material;
+struct granny_mesh;
+struct granny_mesh_binding;
+struct granny_mesh_deformer;
+struct granny_model;
+struct granny_model_instance;
+struct granny_skeleton;
+struct granny_world_pose;

extension/src/port/common/shim/win32/Dimm.h

@@ -0,0 +1,7 @@
+#pragma once
+// Shim for the Active IMM COM interfaces (<dimm.h>; 40250 vendors the MIDL output as
+// EterLib/Dimm.h, which is the SDK header and not part of the port mirror) on non-Windows targets.
+#include <imm.h>
+
+struct IActiveIMMApp;
+struct IActiveIMMMessagePumpOwner;

extension/src/port/common/shim/win32/dinput.h

@@ -1,3 +1,13 @@
 #pragma once
-// Shim for <dinput.h> on non-Windows targets; what 40250 logic uses from it is in <windows.h>.
+// Shim for DirectInput 8 <dinput.h> on non-Windows targets: the interfaces 40250 headers name, as
+// opaque types. Input goes through platform/.
 #include "windows.h"
+
+#ifndef DIRECTINPUT_VERSION
+#define DIRECTINPUT_VERSION 0x0800
+#endif
+
+struct IDirectInput8;
+struct IDirectInputDevice8;
+typedef IDirectInput8* LPDIRECTINPUT8;
+typedef IDirectInputDevice8* LPDIRECTINPUTDEVICE8;

extension/src/port/common/shim/win32/imm.h

@@ -0,0 +1,11 @@
+#pragma once
+// Shim for <imm.h> on non-Windows targets: the input-method handles 40250's IME declarations name.
+// Text input goes through platform/.
+#include "windows.h"
+
+struct HIMC__;
+typedef HIMC__* HIMC;
+struct HIMCC__;
+typedef HIMCC__* HIMCC;
+struct tagINPUTCONTEXT;
+typedef tagINPUTCONTEXT INPUTCONTEXT;

extension/src/port/common/shim/win32/windows.h

@@ -1,5 +1,19 @@
 #pragma once
 // Shim for <windows.h> on non-Windows targets: the Win32 scalar types and CRT spellings
-// 40250 sources use (common/Win32Types.h, common/Win32Crt.h).
+// 40250 sources use (common/Win32Types.h, common/Win32Crt.h), plus the headers the real one pulls
+// in that 40250 relies on transitively (winnt.h brings <string.h> for memcpy/memset).
+#include <string.h>
 #include "../../Win32Types.h"
 #include "../../Win32Crt.h"
+
+// winuser.h / wingdi.h constants named in 40250 declarations (default arguments).
+#define WS_OVERLAPPED 0x00000000L
+#define WS_CAPTION 0x00C00000L
+#define WS_SYSMENU 0x00080000L
+#define WS_THICKFRAME 0x00040000L
+#define WS_MINIMIZEBOX 0x00020000L
+#define WS_MAXIMIZEBOX 0x00010000L
+#define WS_OVERLAPPEDWINDOW (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX)
+#define WHITE_BRUSH 0
+#define BLACK_BRUSH 4
+#define KL_NAMELENGTH 9