feat: airplane mode (#104) + crisper fastfetch logo (#122)

Airplane: runtime Wi-Fi+Bluetooth kill-switch with prior-state restore,
System menu + SUPER+CTRL+R, Waybar plane glyph (self-hides, whole-swap
parity). Fastfetch: chafa sextants at 24×12 (was block 20×10) for a
finer monogram; V2 kitty screenshots under boreal and summer-night.

docs/ROADMAP.md

@@ -427,6 +427,15 @@ Design/decision records and a running log of shipped work (items marked
   default `$TERMINAL` / SUPER+Return, doctor + calendar + what-changed use
   `kitty --class=com.nomarchy.*`. Ghostty module and install-time GL probe
   removed. V3: Acer SUPER+Return + doctor float.
+- ✓ **Airplane mode (#104):** System › Airplane mode + SUPER+CTRL+R +
+  Waybar plane glyph (self-hides when off). Runtime `nomarchy-airplane`
+  softs Wi-Fi (nmcli) + Bluetooth (rfkill/bluetoothctl), remembers prior
+  radio state in `$XDG_RUNTIME_DIR`, restores on disengage. Whole-swap
+  waybar parity.
+- ✓ **Crisper fastfetch logo (#122):** chafa `--symbols sextant` at 24×12
+  (was block 20×10), rsvg width 360. V2 kitty screenshots boreal + summer-night
+  accent; no tofu (fontconfig fallback as today). Diagonals still staircase
+  a little — logo SVG limit, not chafa.
 - ✓ **State file rename (#107):** `theme-state.json` → `state.json`; CLI
   `nomarchy-theme-sync` → `nomarchy-state-sync` (old binary name kept as a
   symlink). Eval/read shims accept the legacy file name; the next write