layout: restructure into src/ tests/ android/ scripts/ tools/

- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
  (+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
  perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten

No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/platform/EterBase/Debug.cpp

@@ -0,0 +1,196 @@
+// Platform skeleton for EterBase/Debug.h (40250 EterBase/Debug.cpp), generated by platform_stub.py.
+// Every MT_PLATFORM_STUB() body is unimplemented: replace it with the platform implementation. Implemented
+// bodies follow the 40250 non-_DEBUG build (batch 2D: Trace*, TraceError to stderr).
+#include "EterBase/StdAfx.h"
+#include "EterBase/Debug.h"
+
+#include "../PlatformStub.h"
+#include "EterBase/Timer.h"
+#include "LogBox.h"
+#include "TraceErrorObserver.h"
+
+#include <cstdarg>
+#include <cstdio>
+#include <ctime>
+#include <string>
+
+const DWORD DEBUG_STRING_MAX_LEN = 1024;
+
+namespace
+{
+TraceErrorObserver g_trace_error_observer = nullptr;
+}
+
+void SetTraceErrorObserver(TraceErrorObserver observer)
+{
+	g_trace_error_observer = observer;
+}
+
+auto SetLogLevel(UINT) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto Log(UINT, const char *) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto Logn(UINT, const char *) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto Logf(UINT, const char *, ...) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto Lognf(UINT, const char *, ...) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+void Trace(const char *)
+{
+	// Non-_DEBUG 40250: written only to the log file (OpenLogFile, not implemented yet).
+}
+
+void Tracen(const char *)
+{
+	// Non-_DEBUG 40250: written only to the log file (OpenLogFile, not implemented yet).
+}
+
+void Tracenf(const char *, ...)
+{
+	// Non-_DEBUG 40250: written only to the log file (OpenLogFile, not implemented yet).
+}
+
+void Tracef(const char *, ...)
+{
+	// Non-_DEBUG 40250: written only to the log file (OpenLogFile, not implemented yet).
+}
+
+void TraceError(const char* c_szFormat, ...)
+{
+#ifndef _DISTRIBUTE
+	char szBuf[DEBUG_STRING_MAX_LEN+2];
+
+	strncpy(szBuf, "SYSERR: ", DEBUG_STRING_MAX_LEN);
+	int len = strlen(szBuf);
+
+	va_list args;
+	va_start(args, c_szFormat);
+	len = _vsnprintf(szBuf + len, sizeof(szBuf) - (len + 1), c_szFormat, args) + len;
+	va_end(args);
+
+	// PORT: _vsnprintf returns -1 on truncation; 40250 then writes the terminator before the buffer.
+	if (len < 8)
+		len = DEBUG_STRING_MAX_LEN;
+
+	szBuf[len] = '\n';
+	szBuf[len + 1] = '\0';
+
+	time_t ct = time(0);
+	struct tm ctm = *localtime(&ct);
+
+	fprintf(stderr, "%02d%02d %02d:%02d:%05d :: %s",
+					ctm.tm_mon + 1,
+					ctm.tm_mday,
+					ctm.tm_hour,
+					ctm.tm_min,
+					ELTimer_GetMSec() % 60000,
+					szBuf + 8);
+	fflush(stderr);
+	if (g_trace_error_observer)
+		g_trace_error_observer(szBuf + 8);
+#endif
+}
+
+auto TraceErrorWithoutEnter(const char *, ...) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+namespace
+{
+std::string& log_box_message()
+{
+	static std::string message;
+	return message;
+}
+}
+
+const std::string& LastLogBoxMessage()
+{
+	return log_box_message();
+}
+
+void ClearLogBoxMessage()
+{
+	log_box_message().clear();
+}
+
+void LogBox(const char * c_szMsg, const char * c_szCaption, HWND)
+{
+	// 40250 pops a MessageBox on g_PopupHwnd and Tracen()s the text. There is no window here and no
+	// log file yet, so stderr is the whole of it; the text is also kept for the caller (LogBox.h),
+	// because it is the only place a script traceback survives.
+	std::string& message = log_box_message();
+	message = c_szCaption ? c_szCaption : "LOG";
+	message += ": ";
+	message += c_szMsg ? c_szMsg : "";
+
+	fprintf(stderr, "%s\n", message.c_str());
+	fflush(stderr);
+	Tracen(c_szMsg);
+}
+
+void LogBoxf(const char * c_szFormat, ...)
+{
+	va_list args;
+	va_start(args, c_szFormat);
+
+	char szBuf[2048];
+	_vsnprintf(szBuf, sizeof(szBuf), c_szFormat, args);
+	va_end(args); // PORT: 40250 leaks the va_list; on this ABI va_end is not optional
+
+	// PORT: _vsnprintf does not terminate on truncation.
+	szBuf[sizeof(szBuf) - 1] = '\0';
+	LogBox(szBuf);
+}
+
+auto LogFile(const char *) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto LogFilef(const char *, ...) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto OpenConsoleWindow() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CloseConsoleWindow() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto SetupLog() -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto OpenLogFile(bool) -> void
+{
+	MT_PLATFORM_STUB();
+}
+
+auto CloseLogFile() -> void
+{
+	MT_PLATFORM_STUB();
+}