feat(menu): Recovery scopes (#111), System IA (#105), drop Control Center (#110)

System is Connectivity / Devices / Recovery / Preferences under the same
six-entry root. Recovery lists desktop (HM), system boot, and BTRFS files
once each with cost labels. Control Center is gone: blur/gaps live in Look
& Feel; update checks and Bluetooth/Printing package toggles in Preferences
(with rebuilds). docs/RECOVERY paths updated.

modules/nixos/default.nix

@@ -21,7 +21,7 @@ let
     install -Dm444 ${./branding/Nomarchy.ttf} $out/share/fonts/truetype/Nomarchy.ttf
   '';
 
-  # Control Center's Bluetooth toggle writes settings.bluetooth.enable; read
+  # Menu Preferences › Bluetooth package writes settings.bluetooth.enable; read
   # it from the state file, the only place it exists on the NixOS side (the
   # hardware.nix/timezone.nix bridge). Missing/invalid JSON fails closed via
   # state-read.nix rather than a raw stack. null = key absent, which
@@ -375,7 +375,6 @@ in
     environment.systemPackages = with pkgs; [
       nomarchy-state-sync # provided by overlays.default
       nomarchy-doctor     # read-only health check (System › Doctor)
-      nomarchy-control-center # TUI control center
       nomarchy-detect-hw  # post-install hardware re-probe (HARDWARE.md §8)
 
       # Day-to-day lifecycle (README §3): nomarchy-pull / -rebuild / -home