closes #112 Replace `os.UserConfigDir()` with explicit `~/.config` fallback to align macOS, Linux, and other platforms on same config location Respects `XDG_CONFIG_HOME` if set, otherwise uses `~/.config/iris/`
closes #112 Replace `os.UserConfigDir()` with explicit `~/.config` fallback to align macOS, Linux, and other platforms on same config location Respects `XDG_CONFIG_HOME` if set, otherwise uses `~/.config/iris/`