docs: 目标平台收窄为 macOS arm64 + Android arm64

用户决定：Linux 和 Windows 不做，不验收、不作为任何步骤的阻塞项。

- PORT-PLAN 第 1 节写明范围；2A step 3 的平台列表、2P step 1/2 措辞跟着改；
  2P step 4 由「五个平台分别验证」改为「两个目标平台」，Linux/Windows 两行
  划掉但保留原因备查（上游 2.7 只支持 MSVC + PC/pyconfig.h，mingw 下
  posixmodule.c / dynload_win.c 与 MinGW 头文件冲突）。
- PLATFORMS.md 新增 Scope 段；THIRD-PARTY.md 的 CPython Windows 段由
  "not built yet" 改为 out of scope；PYTHON-EMBED-EVAL.md 下一步两条。
- 仓库里的 mingw-w64 交叉编译只留作可移植性门禁（它抓到过
  UserInterface/StdAfx.h 的真问题），不代表支持 Windows。
- iOS arm64 暂按次要目标记录：保持交叉编译干净，但不作为验收目标。

仅文档改动。port_map.py check 0 error；参考 EterPack.cpp 的 8 个 pack key
值逐个 git grep --cached -w，均未入库。

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

audit/history.jsonl

@@ -496,3 +496,4 @@
 {"time": "2026-09-23T17:30:00Z", "event": "port_round", "unit": "PORT-PLAN 批次 2P step 2: ScriptLib/PythonLauncher.cpp into port_logic on the embedded interpreter", "ported": ["ScriptLib/PythonLauncher.cpp (10 of 12 fns)", "ScriptLib/PythonMarshal.cpp (4 of 11)"], "adapted": [], "deleted": [], "divergent": [], "needs_live": [], "status_note": "statuses set only for what port.python_launcher actually runs. PythonUtils.cpp is copied and compiled but nothing calls it yet (the binding modules are 2V0), so all 19 stay TODO; TraceFunc/SetTraceFunc are _DEBUG-only; in PythonMarshal only the small-.pyc path runs (r_long, _PyMarshal_ReadLongFromFile, getfilesize, _PyMarshal_ReadLastObjectFromFile) because that one delegates to CPython's own PyMarshal_ReadObjectFromString under 16KB, leaving the ported r_object reader unreached. Two // PORT: edits: `unsigned char(val)` -> a cast (MSVC extension) in PythonUtils.cpp x2, and PyObject_AsCharBuffer's Py_ssize_t* in TraceFunc. CPythonLauncher::GetError dereferences the NULL PyErr_Fetch yields when nothing is pending — kept verbatim, the test only calls it with an error set.", "shims": "extension/src/port/common/shim/sdk/Python-2.7/: 12 forwarding headers for 40250's #include <Python-2.7/*>; symtable.h forward-declares mod_ty instead of including Python-ast.h, whose one-word macros (Delete, Module, Set, Print) collide with EterLib/Pool.h — 40250 sidestepped the same clash by commenting out PySymtable_Build", "tests": ["ctest port.python_launcher (macOS arm64): Create/RunLine/RunMemoryTextFile(CRLF)/RunCompiledFile(.pyc)/RunFile PASS; RunFile(\"system.py\") reads the real pack and stops at ImportError: No module named app (the 2V0 C++ modules)", "ctest macOS: 27/27 PASS", "android arm64 NDK API 24 + ios arm64 iphoneos: port_logic (incl. ScriptLib) compiles"], "commit": "2P-step2"}
 {"time": "2026-09-23T19:30:00Z", "event": "port_round", "unit": "PORT-PLAN 批次 2P step 3a/3b: python27.zip on sys.path (platform/ScriptLib/PythonHost) + the pack module", "ported": ["UserInterface/PythonPackModule.cpp (3 of 5 fns: packExist, packGet, initpack)"], "adapted": [], "deleted": [], "divergent": [], "needs_live": [], "stdlib": {"builder": "tools/py_embed/make_stdlib_zip.py <Lib> <out.zip>, CMake target mtpython_stdlib -> <build>/python27.zip", "contents": "397 modules, 6876547 bytes, ZIP_STORED (no zlib module, so zipimport cannot inflate); deterministic (sorted, fixed timestamp) so the sha256 identifies it", "sha256": "5fce8f974a89b66110823d7529be96e359b56dea05fc6875189a241d2d37a7d6", "skipped": "test/tests trees, lib-tk, idlelib, lib2to3, bsddb, ensurepip, curses, distutils, unittest, wsgiref, multiprocessing, compiler, plat-*", "host": "platform/ScriptLib/PythonHost.cpp: Configure() sets Py_NoSiteFlag/IgnoreEnvironment/Frozen/DontWriteBytecode + program name before Py_Initialize; InstallStdLib() does PySys_SetPath then re-registers encodings.search_function, because 2.7 initializes the codec registry once at startup and never retries"}, "status_note": "PythonPackModule's other two functions are CAccountConnector's login key builder, which happens to live in that unit; kept verbatim under #if 0 until the 2V1 login slice brings AccountConnector.h. port/UserInterface/StdAfx.h is a partial mirror: the original includes every library's StdAfx plus <dshow.h>/<qedit.h>, so it carries only what compiles today (ScriptLib/StdAfx.h, APP_NAME, the name length enum, initpack) and grows with the 2V slices.", "tests": ["ctest python.embed now runs against python27.zip itself (zipimport), not the loose Lib/", "ctest port.python_launcher: InstallStdLib + `import os, string, types, codecs` + cp1252 encode; initpack then pack.Exist/pack.Get for system.py (byte count equals CEterPackManager's), uiscript/selectcharacterwindow.py and locale/en/locale_game.txt; .tga and a missing file give None", "ctest macOS: 27/27 PASS", "android arm64 + ios arm64: port_platform (incl. PythonHost, PythonPackModule) compiles"], "not_done": ["3c: stage python27.zip out of the app resources into the sandbox on Android/iOS and check it against the manifest sha256; PythonHost::DefaultStdLibPath() only reads MT_PYTHON_STDLIB today"], "commit": "2P-step3ab"}
 {"time": "2026-09-23T21:40:00Z", "event": "port_round", "unit": "PORT-PLAN 批次 2P step 3c: staging python27.zip into the mobile sandbox", "ported": [], "adapted": [], "deleted": [], "divergent": [], "needs_live": [], "staging": {"ships": "make_stdlib_zip.py also writes <out>.sha256; target mtpython_stdlib_project copy_if_different's python27.zip + .sha256 into project/ (gitignored), and both export presets' include_filter lists them so they enter the PCK", "runtime": "extension/src/python_stdlib.cpp (GDScript: Metin2Python.stdlib_path(force_stage)) — desktop uses ProjectSettings.globalize_path(res://python27.zip) in place; exported builds read the bytes out of the PCK, write user://python27.zip.part, verify the sha256 of the written file, then rename to user://python27.zip. An existing sandbox copy is reused only when it hashes to the shipped digest, so a torn first start or a new build re-stages.", "handoff": "PythonHost::SetDefaultStdLibPath() — DefaultStdLibPath() now answers with the staged path; $MT_PYTHON_STDLIB still wins. python_stdlib.cpp is the only unit that knows res:// / user://; port_platform stays godot-free.", "build_fix": "the Windows gate (MinGW, no mtpython) was broken by step 3b and is fixed here: port/CMakeLists.txt now also excludes UserInterface/StdAfx.h (it includes ScriptLib/StdAfx.h, as the original PCH does) and UserInterface/PythonPackModule.cpp, and platform/CMakeLists.txt excludes platform/ScriptLib/ the way port_logic already excluded port/ScriptLib/."}, "status_note": "On-device staging is not verified: the macOS test drives the mobile path with force_stage=true, and Android/iOS user:// sandboxes come with step 4. The zip's presence in an exported pack was checked with --export-pack, not with an APK. Nothing in the app's boot path calls Metin2Python.stdlib_path() yet — the interpreter only starts in the process with 2V0; today the test is its only caller.", "tests": ["project/python_stdlib_test.gd (godot --headless --path project --script python_stdlib_test.gd) -> PASS: in-place path on desktop; force_stage copies into user://, sha256 matches the shipped digest, bytes equal res://, no .part left, ZIPReader opens it and finds encodings/__init__.py and os.py; a second call does not re-copy (mtime unchanged); a deliberately corrupted sandbox copy is re-staged", "godot --headless --export-pack macOS <zip> lists python27.zip (6876547) and python27.zip.sha256 (65)"], "not_done": "真机验证（Android/iOS 进程内落盘 + system.py -> prototype.RunApp()）随 2P step 4；Linux/Windows 见 step 4 表格", "commit": "2P-step3c"}
+{"time": "2026-09-23T22:20:00Z", "event": "scope_decision", "unit": "目标平台收窄为 macOS arm64 + Android arm64（Linux / Windows 不做）", "ported": [], "adapted": [], "deleted": [], "divergent": [], "needs_live": [], "decision": {"by": "user", "statement": "Linux 和 Windows 不考虑，目前主要支持 macOS arm64 和 Android arm64", "ios": "iOS arm64 保留为交叉编译干净的次要目标，不作为验收目标（我的判断，待用户确认）", "mingw": "仓库里的 mingw-w64 交叉编译只留作可移植性门禁——它这次抓到了 UserInterface/StdAfx.h 的真问题——不代表支持 Windows，不为它投入额外工作，也不阻塞任何步骤"}, "docs": ["docs/PORT-PLAN.md: 第 1 节新增范围段；批次 2A step 3 平台列表；批次 2P step 1/2 措辞；step 4 由「五个平台」改为「两个目标平台」，Linux/Windows 两行划掉并保留原因备查；总表 2P 行", "docs/PLATFORMS.md: 新增 Scope 段", "docs/THIRD-PARTY.md: CPython 的 Windows 段由「not built yet」改为 out of scope + 原因备查", "docs/PYTHON-EMBED-EVAL.md: 下一步 1/3 两条"], "tests": "仅文档改动，无代码改动；port_map.py check 0 error / 1 tag；参考 EterPack.cpp 的 8 个 pack key 值逐个 git grep --cached -w，均未入库", "not_done": "2P step 4 剩余项仍在：Android 真机 APK 进程内的 3c 沙盒落地，以及 app 进程里跑 system.py → prototype.RunApp()"}