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/EterLib/FileLoaderThread.h

@@ -0,0 +1,63 @@
+#ifndef __INC_YMIR_ETERLIB_FILELOADERTHREAD_H__
+#define __INC_YMIR_ETERLIB_FILELOADERTHREAD_H__
+
+#include <deque>
+#include "Thread.h"
+#include "Mutex.h"
+#include "../EterBase/MappedFile.h"
+
+class CFileLoaderThread 
+{
+	public:
+		typedef struct SData
+		{
+			std::string	stFileName;
+
+			CMappedFile	File;
+			LPVOID		pvBuf;
+			DWORD		dwSize;
+		} TData;
+
+	public:
+		CFileLoaderThread();
+		~CFileLoaderThread();
+
+		int Create(void * arg);
+	
+	public:
+		void	Request(std::string & c_rstFileName);
+		bool	Fetch(TData ** ppData);
+		void	Shutdown();
+
+	protected:
+		static UINT CALLBACK	EntryPoint(void * pThis);
+		UINT					Run(void * arg);
+
+		void *					Arg() const		{ return m_pArg; }
+		void					Arg(void * arg) { m_pArg = arg; }
+		
+		HANDLE					m_hThread;
+
+	private:
+		void *					m_pArg;
+		unsigned				m_uThreadID;
+
+	protected:
+		UINT					Setup();
+		UINT					Execute(void * pvArg);
+		void					Destroy();
+		void					Process();
+
+	private:
+		std::deque<TData *>		m_pRequestDeque;
+		Mutex					m_RequestMutex;
+
+		std::deque<TData *>		m_pCompleteDeque;
+		Mutex					m_CompleteMutex;
+
+		HANDLE					m_hSemaphore;
+		int						m_iRestSemCount;
+		bool					m_bShutdowned;
+};
+
+#endif