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/CMakeLists.txt

@@ -18,9 +18,10 @@ set(MT_PORT_SHIMS ${CMAKE_CURRENT_SOURCE_DIR}/common/shim/sdk)
 if(NOT WIN32)
     list(APPEND MT_PORT_SHIMS ${CMAKE_CURRENT_SOURCE_DIR}/common/shim/win32)
 endif()
-# EterBase/lzo.h includes <lzo/lzo1x.h>; third_party/minilzo provides that path.
-list(APPEND MT_PORT_SHIMS ${CMAKE_CURRENT_SOURCE_DIR}/../../third_party/minilzo)
 target_include_directories(port_logic PUBLIC ${MT_PORT_SHIMS})
+# Libraries 40250 links that are vendored as-is: <lzo/lzo1x.h> (EterBase/lzo.h), <cryptopp/*>
+# (EterBase/cipher.h).
+target_link_libraries(port_logic PUBLIC mt3p::minilzo mt3p::cryptopp)
 # 40250 sources carry MSVC `#pragma warning(...)` lines verbatim, and non-literal printf formats
 # (EterImageLib/StdAfx.h) that the Android toolchain turns into errors.
 set(MT_PORT_WARNING_FLAGS)
@@ -83,10 +84,13 @@ foreach(hdr IN LISTS MT_PORT_HEADERS)
 endforeach()
 add_library(port_header_gate OBJECT ${MT_PORT_GATE_SOURCES})
 target_include_directories(port_header_gate PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ${MT_PORT_SHIMS})
+target_link_libraries(port_header_gate PRIVATE mt3p::minilzo mt3p::cryptopp)
 target_compile_features(port_header_gate PRIVATE cxx_std_20)
 target_compile_options(port_header_gate PRIVATE ${MT_PORT_WARNING_FLAGS})
 add_dependencies(port_logic port_header_gate)
 
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../platform ${CMAKE_CURRENT_BINARY_DIR}/../platform)
+
 if(BUILD_TESTING AND CMAKE_SYSTEM_NAME STREQUAL CMAKE_HOST_SYSTEM_NAME)
     add_executable(port_common_test ${CMAKE_CURRENT_SOURCE_DIR}/../../tests/port_common_test.cpp)
     target_link_libraries(port_common_test PRIVATE port_logic)