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.

agent/BACKLOG.md

@@ -78,71 +78,6 @@ cable leaves. Capture steps in HARDWARE-QUEUE.
 
 ## NEXT
 
-### 122. A crisper Nomarchy logo in fastfetch
-
-Bernardo 2026-07-14: the ASCII/block logo fastfetch prints should be **crisper,
-with straight lines** — a "high resolution" ASCII logo rather than the chunky
-mark it renders today.
-
-Where it comes from (`modules/home/fastfetch.nix:12-17`): the vendored vector
-mark is rasterised at 220px (`rsvg-convert`), recoloured to `theme.colors.accent`
-with `magick`, and converted at build time by
-`chafa --format symbols --symbols block --size 20x10 --colors full`. **That
-`--symbols block` is the cause**: it restricts chafa to full/half blocks, so a
-20×10 grid carries roughly 20×20 pixels of detail and every diagonal turns into
-a staircase.
-
-**`--symbols sextant` is the lever, and it is available — verified 2026-07-14 on
-a real Nomarchy machine.** Chase the *fallback*, not one font's charset; this
-was got wrong twice while filing, both times by checking a single font:
-
-- The mono face is **per theme** (`kitty.nix` → `t.fonts.mono` from the
-  theme JSON), not stylix's default. **Boreal — the default theme and the base
-  state — is `GeistMono Nerd Font`**; the other 23 themes are `JetBrainsMono
-  Nerd Font`. Any answer must hold for both.
-- Neither of those two faces covers U+1FBxx (sextants), U+2800 (braille) — **and
-  GeistMono covers no block elements (U+2580–259F) or box drawing either**. So
-  **the logo already renders through fontconfig fallback on the default theme
-  today**, and has all along. Fallback is the normal case here, not the risk.
-- Fallback resolves it: `fc-list :charset=1fb00` → **37 families** on a real
-  box, including the shipped `nerd-fonts.caskaydia-cove` plus
-  `noto-fonts`' Noto Sans Symbols 2; `fc-match "GeistMono Nerd Font:charset=1fb00"`
-  picks CaskaydiaCove. Braille: 59 families. **No tofu.**
-
-So the change itself is roughly a one-flag edit (`--symbols block` →
-`sextant`, 2×3 subcells = 6× the detail, likely with a larger `--size` and a
-matching `rsvg-convert -w`). **The work is the verification, not the edit.**
-Two things can still make it look worse, and only a real terminal can say:
-**(1) fallback metrics** — CaskaydiaCove's sextants drawn in GeistMono's cell
-may not align or may differ in stroke weight, and this is precisely the kind of
-seam that looks fine in a VM and wrong on a laptop; **(2)** the mark is
-**diagonal-heavy** (an N-monogram of angled strokes), and diagonals staircase
-under *any* cell symbol — more resolution makes a finer staircase, not a
-straight line. If "straight lines" means the mark itself should be redrawn with
-straight strokes, that is a **logo design change** to `logo.svg` — not a
-renderer tweak — and it hits all three surfaces below. Settle which is wanted
-before touching chafa flags.
-
-**Note the mark is diagonal-heavy** (an N-monogram of angled strokes), which is
-the underlying tension: diagonals staircase under block symbols at *any* size.
-If "straight lines" means the logo itself should be redrawn with straight
-strokes, that is a **logo design change** to `logo.svg`, not a renderer tweak —
-and it would hit all three surfaces below. Settle which is wanted first.
-
-Do **not** conflate the three logo surfaces — they are different renderers and
-a change here touches only the first: fastfetch (this item), the ISO boot splash
-(`hosts/live.nix` `isoSplash`, rsvg→magick), and the Waybar menu glyph
-(`Nomarchy.ttf` U+F000, `modules/nixos/branding/`). The vector source
-(`modules/nixos/branding/logo.svg`) is shared, so a change to *it* hits all
-three — if the SVG is what needs work, say so and split the item.
-
-This is a **visual change**, so `agent/THEME-DESIGN.md` and the honesty rule
-apply: no "it probably looks fine". Pass = the logo reads crisply in a real
-terminal at the shipped font, **screenshots captured and viewed under at least
-two themes** (one generated palette, one whole-swap), no tofu, it still tracks
-the accent on a theme switch, and the fastfetch layout still lines up (the logo
-column and the module list share a row grid — changing `--size` moves it).
-
 ### 120. A netinstall ISO, next to the fat offline one
 
 Bernardo 2026-07-14, after seeing the measured size: **keep the current ISO
@@ -234,13 +169,6 @@ a suspended machine hibernates after the configured delay and resumes, and a
 machine without hibernate support hides the row instead of offering a
 suspend that never wakes.
 
-### 104. Runtime Airplane mode
-
-Add Airplane mode under System connectivity controls. It must disable Wi-Fi
-and Bluetooth together, remember their prior states, and restore those states
-when disengaged. Pass = the runtime round trip works, and a Waybar indicator is
-visible only while engaged with parity across every whole-bar swap.
-
 ### 105. `[big]` System-menu information architecture
 
 Keep exactly six root menu entries while reorganizing System into