Issue with std::filesystem::path conversion to std::string in C++

I'm facing an issue while attempting to fetch all filenames from a directory. The problem arises when handling certain strings, resulting in errors. Below is the code snippet:

#include <filesystem>int main(){    const char* dir = "D:\\Music";    std::vector<std::string> musicList;    for (const auto& entry : std::filesystem::recursive_directory_iterator(dir))    {        if (entry.is_regular_file())        {            musicList.emplace_back(entry.path().string());        }    }}

The issue occurs at entry.path().string() when processing strings like L"D:\\Music\\suki\\Angel Note - 月明かりは優しく・・・.mp3". The program terminates with an error pointing to:

_STD_BEGIN// We would really love to use the proper way of building error_code by specializing// is_error_code_enum and make_error_code for __std_win_error, but because://   1. We would like to keep the definition of __std_win_error in xfilesystem_abi.h//   2. and xfilesystem_abi.h cannot include <system_error>//   3. and specialization of is_error_code_enum and overload of make_error_code//      need to be kept together with the enum (see limerick in N4950 [temp.expl.spec]/8)// we resort to using this _Make_ec helper._NODISCARD inline error_code _Make_ec(__std_win_error _Errno) noexcept { // make an error_code    return { static_cast<int>(_Errno), _STD system_category() };}[[noreturn]] inline void _Throw_system_error_from_std_win_error(const __std_win_error _Errno) {    _THROW(system_error{ _Make_ec(_Errno) });  // Here occur error!}_STD_END

I compiled the code in Visual Studio 2022, and the C++ standard is C++17.

Upon investigation, I simplified the issue with:

#include <filesystem>int main(){    std::filesystem::path path = L"・";    auto str = path.string();}

Similar issues arose at path.string(). Upon further simplification using L"\u30FB", I discovered the character ・ is represented as "\u30FB".

While path.wstring(), path.u8string(), and other string conversions work well, I need a char* for APIs such as ImGui::Text(str) or FMOD's API. Attempts to convert wstring to string using codecvt, Win32 API, or ICU resulted in garbled text like "・":

#include <filesystem>#include <Windows.h>std::string ws2s(const std::wstring& wstr){    int len = WideCharToMultiByte(CP_UTF8, 0, wstr.c_str(), -1, nullptr, 0, nullptr, nullptr);    std::string str;    str.reserve(len);    WideCharToMultiByte(CP_UTF8, 0, wstr.c_str(), -1, str.data(), len, nullptr, nullptr);    return str;}int main(){    std::filesystem::path path = L"\u30FB";    auto str = ws2s(path.wstring());}

The resulting str was "・" instead of "\u30FB".

Is there a reliable method to handle this situation effectively?