Continuing from 2acb823e7 which enabled wifi/sound/kidlisp on nix: NixOS boot: - Switch GRUB → systemd-boot (cut loader from 2min to ~55s) - EFI-only partition table (no BIOS boot, fixes ThinkPad 11e) - Silent boot: console=tty2, quiet, initrd.verbose=false - Filter build/ dir from nix source (device nodes crash nix eval) ac-native (C): - Hide Wayland cursor via wl_pointer_set_cursor(NULL) on enter - Use systemctl poweroff/reboot when not PID 1 (fixes "failed to execute shutdown binary" under systemd) - Aggressive mic compressor: threshold 0.15 (was 0.5), ratio 12:1 (was 4:1), hard limiter at 0.9 to prevent clipping Kiosk service: - Add ALSA_CONFIG_PATH for NixOS alsa-lib store path - WLR_NO_HARDWARE_CURSORS + XCURSOR_SIZE=1 env vars - Quieter kernel params in base configuration Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>