Ensure Win32 resize hooks removed during shutdown

[MelkorBalrog]

Summary

• register and uninstall Windows resize hooks globally so callbacks stop before the interpreter releases the GIL
• keep window resize controllers detaching native hooks even during Python finalization to prevent late callbacks
• document the shutdown safety change in HISTORY

Testing

• python -m pytest (fails: missing optional dependencies such as PIL prevent test collection)
• python -m radon cc -s -j gui/utils/window_resizer.py gui/utils/win32_hooks.py (fails: radon not installed)

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Win32 hook finalizer skips uninstall during shutdown

When sys.is_finalizing() is true, _Win32WindowProcHook.__del__ now drops the hook from _HOOKS and returns without calling uninstall, so the patched window procedure remains installed while the CFUNCTYPE callback is being torn down. During interpreter shutdown WindowResizeController.__del__ also exits immediately (window_resizer.py:333-334), so hooks created by controllers are collected via this branch and never reach the new atexit cleanup (the hook has already been removed from _HOOKS). On Windows any late WM messages in that window tear-down window will then call a freed callback, risking crashes precisely during interpreter exit—the scenario this change was meant to prevent.

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