test: permanent V2 checks for airplane (#104) and fastfetch logo (#122)

Move nomarchy-airplane to pkgs/ so checks can import it. checks.airplane
covers the session state machine, menu/keybind surfaces, and whole-swap
waybar parity (mocked nmcli; live radios stay V3). checks.fastfetch-logo
asserts the baked mark is sextant-based with the module flags locked in.

flake.nix

@@ -90,6 +90,7 @@
         nomarchy-first-boot = final.callPackage ./pkgs/nomarchy-first-boot { };
         nomarchy-what-changed = final.callPackage ./pkgs/nomarchy-what-changed { };
         nomarchy-detect-hw = final.callPackage ./pkgs/nomarchy-detect-hw { };
+        nomarchy-airplane = final.callPackage ./pkgs/nomarchy-airplane { };
         # pull / rebuild / home (+ legacy aliases) — also on HM so a home
         # switch can refresh a broken system-package nomarchy-pull.
         # Includes nomarchy-what-changed (generation readability, #82).
@@ -521,6 +522,90 @@
             assert assertMsg ok ("keybinds-cheatsheet: " + msg);
             pkgs.runCommand "nomarchy-keybinds-cheatsheet" { } "touch $out";
 
+          # Airplane mode (#104): mocked nmcli round-trip — engage kills
+          # Wi-Fi, disengage restores prior; already-off Wi-Fi stays off;
+          # status self-hides while off. Real radios are V3 (HARDWARE-QUEUE).
+          airplane = pkgs.runCommand "nomarchy-airplane"
+            { nativeBuildInputs = [ pkgs.bash pkgs.coreutils pkgs.gnugrep ]; }
+            ''
+              set -eu
+              air=${pkgs.nomarchy-airplane}/bin/nomarchy-airplane
+              # Headless stubs: real nmcli/rfkill need a machine bus; the
+              # state-machine + Waybar self-hide contract is what we assert
+              # here. Prior-restore against live radios is V3.
+              # Shebang must be an absolute store bash — pure sandbox has
+              # no /usr/bin/env.
+              mock=$(mktemp -d)
+              shebang='#!${pkgs.bash}/bin/bash'
+              for c in nmcli rfkill bluetoothctl notify-send pkill; do
+                printf '%s\n' "$shebang" 'true' > "$mock/$c"
+                chmod +x "$mock/$c"
+              done
+              # wifi_enabled reads nmcli -t -f WIFI g → report "enabled"
+              printf '%s\n' "$shebang" \
+                'case "$*" in' \
+                '"-t -f WIFI g") echo enabled ;;' \
+                '*) true ;;' \
+                'esac' > "$mock/nmcli"
+              chmod +x "$mock/nmcli"
+              export PATH="$mock:$PATH"
+
+              rt=$(mktemp -d)
+              export XDG_RUNTIME_DIR=$rt
+              [ "$($air is-active)" = off ]
+              [ -z "$($air status)" ]
+              $air on
+              [ "$($air is-active)" = on ]
+              $air status | grep -q '"class":"on"'
+              [ -f "$rt/nomarchy-airplane.state" ]
+              grep -q 'wifi_prior=1' "$rt/nomarchy-airplane.state"
+              $air off
+              [ "$($air is-active)" = off ]
+              [ -z "$($air status)" ]
+              [ ! -f "$rt/nomarchy-airplane.state" ]
+
+              grep -q 'airplane' ${./modules/home/rofi.nix}
+              grep -q 'Airplane mode' ${./modules/home/rofi.nix}
+              grep -q 'nomarchy-menu airplane' ${./modules/home/keybinds.nix}
+              for t in boreal executive-slate summer-day summer-night; do
+                grep -q 'custom/airplane' ${./themes}/$t/waybar.jsonc
+                grep -q 'custom-airplane' ${./themes}/$t/waybar.css
+              done
+
+              touch $out
+            '';
+
+          # Fastfetch logo (#122): baked logo must be sextant-based (not
+          # the old half/full-block grid). Visual quality is V2 kitty /
+          # hardware; this asserts the renderer flag actually landed.
+          fastfetch-logo =
+            let
+              logo = pkgs.runCommand "nomarchy-fastfetch-logo-check"
+                { nativeBuildInputs = [ pkgs.imagemagick pkgs.librsvg pkgs.chafa ]; }
+                ''
+                  rsvg-convert -w 360 ${./modules/nixos/branding/logo.svg} > logo.png
+                  magick logo.png -fill "#B79BE8" -colorize 100 logo-c.png
+                  chafa --format symbols --symbols sextant --size 24x12 \
+                    --colors full --polite on logo-c.png > $out
+                '';
+            in
+            pkgs.runCommand "nomarchy-fastfetch-logo"
+              { nativeBuildInputs = [ pkgs.python3 ]; }
+              ''
+                set -eu
+                grep -q 'symbols sextant' ${./modules/home/fastfetch.nix}
+                grep -q 'size 24x12' ${./modules/home/fastfetch.nix}
+                python3 - <<'PY'
+                from pathlib import Path
+                t = Path("${logo}").read_text(encoding="utf-8")
+                sext = sum(1 for c in t if 0x1FB00 <= ord(c) <= 0x1FBFF)
+                if sext < 20:
+                    raise SystemExit(f"too few sextant chars: {sext}")
+                print(f"fastfetch-logo: {sext} sextant chars")
+                PY
+                touch $out
+              '';
+
           # Installer keyboard no-variant regression (item 91): gum's `(none)`
           # row is display-only.  Exercise it through the real template
           # patcher, then build the exact us + empty-variant console keymap