Fix macOS (aarch64-darwin) build: replace zoned_time with portable localtime_r/strftime

[Copilot]

std::chrono::zoned_time and std::chrono::current_zone() are absent from Apple's libc++ on macOS 14, breaking every translation unit that includes Logger.hpp.

Changes

• include/Logger.hpp: Replace zoned_time-based time() and date() helpers with localtime_r + strftime. Add <ctime> include. Update doc comment (format is now HH:MM:SS, not HH:MM:SS.mmm).
• test/LoggerTest.cpp: Same substitution in the log-rotation test case that reproduced the date string independently.

Before

static std::string time() {
    return std::format(
        "{:%T}", std::chrono::zoned_time{std::chrono::current_zone(),
                                         std::chrono::system_clock::now()});
}

After

static std::string time() {
    auto now = std::chrono::system_clock::now();
    std::time_t t = std::chrono::system_clock::to_time_t(now);
    std::tm local_tm{};
    localtime_r(&t, &local_tm);
    char buf[9];
    std::strftime(buf, sizeof(buf), "%T", &local_tm);
    return std::string(buf);
}

localtime_r is POSIX-standard and thread-safe, covering both Linux and macOS.

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[github-actions]

📊 Coverage Report

Coverage Summary

Filename                      Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
include/GameEngine.hpp              4                 0   100.00%           2                 0   100.00%           7                 0   100.00%           0                 0         -
include/IGameMode.hpp               3                 0   100.00%           2                 0   100.00%           2                 0   100.00%           0                 0         -
include/IMidiInput.hpp              1                 0   100.00%           1                 0   100.00%           1                 0   100.00%           0                 0         -
include/ITransport.hpp              1                 0   100.00%           1                 0   100.00%           1                 0   100.00%           0                 0         -
include/Logger.hpp                 27                 2    92.59%           7                 0   100.00%          54                 1    98.15%          16                 2    87.50%
include/Message.hpp                11                 0   100.00%           5                 0   100.00%          10                 0   100.00%           2                 0   100.00%
include/Note.hpp                    8                 0   100.00%           2                 0   100.00%           7                 0   100.00%           4                 0   100.00%
include/RtMidiInput.hpp             4                 0   100.00%           4                 0   100.00%           7                 0   100.00%           0                 0         -
include/UdsTransport.hpp            4                 0   100.00%           3                 0   100.00%           8                 0   100.00%           0                 0         -
src/AnswerValidator.cpp            67                 7    89.55%           5                 0   100.00%          99                 7    92.93%          48                12    75.00%
src/ChallengeFactory.cpp           19                 0   100.00%           5                 0   100.00%          58                 0   100.00%          10                 0   100.00%
src/ChordGame.cpp                  53                 0   100.00%           4                 0   100.00%         104                 0   100.00%          40                 1    97.50%
src/GameEngine.cpp                 64                 2    96.88%           7                 0   100.00%         128                 3    97.66%          42                 4    90.48%
src/NoteGame.cpp                   39                 1    97.44%           4                 0   100.00%          76                 0   100.00%          28                 3    89.29%
src/RtMidiInput.cpp                56                 7    87.50%          16                 6    62.50%         136                16    88.24%          32                 7    78.12%
src/UdsTransport.cpp               82                 3    96.34%           8                 0   100.00%         126                12    90.48%          51                 6    88.24%
src/main.cpp                       25                 2    92.00%           3                 0   100.00%          52                10    80.77%          14                 6    57.14%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                             468                24    94.87%          79                 6    92.41%         876                49    94.41%         287                41    85.71%