Sync master with upstream (2026-09-16) - #8
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This advances the C++ version from C++17 to C++23, most of the immediate fallout is from UTF-8 strings in filesystem code. This change keeps the impact minimal by casting at the boundaries rather than changing internal string representations to u8string and char8_t, something that might be desirable down the line.
feat: bump language version to C++23
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Merges upstream/master:
8694a07Merge PR feat: bump language version to C++23 PathOfBuildingCommunity/PathOfBuilding-SimpleGraphic#120 from zao/feat/cpp23-first54950cffeat: bump language version to C++23Clean merge (ort auto-merged
CMakeLists.txt,engine/render/r_main.cpp,engine/system/win/sys_main.cpp,engine/system/win/sys_video.cpp).macOS port: no forward-porting needed.
verify-port.shreports 18 fork-patched files before and after the merge, no dropped or unsignatured fork lines, no file-mode changes, no re-versioned vendored port dirs (P5 clean).Gate for the C++23 bump on macOS is a local arm64 rebuild + runtime smoke test, run after merge.