fix: real-hardware QA sweep — wifi, fonts, firmware, Hyprland 0.55, offline switching

Roadmap items 1+2 plus the issues found testing on a Latitude 5410:

- Ship the 10 most popular Nerd Fonts by default (iosevka swapped for
  mononoki: 1.1 GB vs 27 MB) and warn from nomarchy-theme-sync when a
  configured fonts.mono/fonts.ui family isn't installed (fc-match) —
  fontconfig substitutes silently otherwise.
- hardware.enableRedistributableFirmware: installed systems shipped NO
  firmware blobs (wifi/SOF audio/BT) — nixos-generate-config only emits
  microcode lines referencing this flag, it never sets it.
- Live ISO wifi: networking.wireless.enable = mkForce false killed
  NetworkManager's supplicant — since 26.05 the NM module drives its
  wifi backend THROUGH networking.wireless (dbusControlled). Devices
  vanished from nmtui with iwlwifi loaded and no rfkill block.
- Hyprland 0.55: launch sessions via start-hyprland (watchdog; bare
  binary warns), add the new gesture keyword (workspace_swipe is gone —
  touchpads had no gestures at all), media keys via wpctl/bindel/bindl
  plus the missing mic/play/next/prev binds.
- Offline theme switching: pin mustache-go + stdenv + the repo's own
  standalone HM generation (incl. home-files inputDerivation) into the
  ISO — stylix re-renders base16 templates per switch and an offline
  `apply` cascaded into building stdenv from source (1107 drvs).
  Verified with tools/vm/gap-analysis.py: 17 config drvs, zero fetches.
- Stylix: track release-26.05 (kills the HM version-skew warning and
  the stale home-manager follows), lock updated.
- Roadmap: swaync (no notification daemon ships today).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -230,8 +230,6 @@ workspaces · `Print` region screenshot.
   `tools/import-palettes.py <palettes-dir> themes/`.
 
 ## Roadmap
-- Fix UI: Install Nerd fonts by default (10 most popular ones) and check if the theme's font is installed and correctly set across the sytem.
-- Check if distro is shipping drivers (a test on real hardware was missing wifi driver)
 - We need to start creating a menu system (for apps launcher and for theme switching)
 - We need to add networkManager applet to waybar so user can easily connect to internet
 - **Faster switches:** move `backgrounds/` out of the flake source (the 86 MB
@@ -241,3 +239,4 @@ workspaces · `Print` region screenshot.
 - Installer round 2: multi-disk BTRFS RAID, impermanence, BIOS/legacy
   boot (v1 `nomarchy-install` is single-disk UEFI — see `pkgs/nomarchy-install`)
 - `hyprlock`/`hypridle`, swayosd, launch-or-focus UX scripts
+- swaync notification center (notify-send currently renders bare)