Platform-dispatched constants where Linux and macOS diverge:
TIOCSWINSZ, O_NONBLOCK, MsghdrDarwin struct (4-byte msg_iovlen
and msg_controllen vs Linux's 8-byte size_t fields), and split
recvmsg into Linux/Darwin typed variants so scm_rights uses the
correct struct per platform.
Also: app settings dir uses ~/Library/Application Support on
macOS, removed hardcoded TERMINFO from pane spawn env, removed
debug print from native_pty resize.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude
943ab966d2