feat(home): menu system, swaync, idle/lock, nm-applet, theme parity

- Themed fuzzel (modules/home/fuzzel.nix): palette/fonts/border from the
  JSON, themes/<slug>/fuzzel.ini whole-swap mechanism. Plus the
  nomarchy-menu dispatcher: root picker · power (SUPER+Escape) · theme
  (SUPER+T) · clipboard (SUPER+CTRL+V, cliphist) · calc (qalc) · files
  (fd→xdg-open) · web (DuckDuckGo).
- swaync notifications themed from the JSON (SUPER+N) — until now nothing
  rendered notify-send (theme toasts, font warnings, welcome msg).
- hyprlock + hypridle (modules/home/idle.nix): lock 5min, dpms off 10,
  suspend 30; enables the power menu's Lock entry. cliphist daemon on.
- NetworkManager applet in waybar's tray (preferStatusNotifierItems);
  network module on-click → $TERMINAL -e nmtui.
- nomarchy.keyboard.layout/.variant option → Hyprland kb_layout/kb_variant
  (the installer writes it; pairs with system-side xkb for tty/LUKS).
- Media-key/audio on-click moved to wpctl (pamixer was inconsistent).
- Theme parity: summer-day/night carry their legacy bar LAYOUTS as
  waybar.jsonc whole-swaps (the original import took waybar.css but not
  config.jsonc, so identity themes styled nonexistent modules). Dead
  legacy script-modules dropped, Nerd-Fonts-v2 codepoints → FontAwesome/v3
  (font-awesome now shipped), logo buttons open nomarchy-menu.

New toggles: nomarchy.{fuzzel,swaync,idle}.enable (all default true).

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

modules/home/waybar.nix

@@ -60,7 +60,7 @@ let
       format = "{icon} {volume}%";
       format-muted = "󰝟";
       format-icons.default = [ "󰕿" "󰖀" "󰕾" ];
-      on-click = "pamixer -t";
+      on-click = "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle";
     };
 
     network = {
@@ -68,6 +68,9 @@ let
       format-ethernet = "󰈀";
       format-disconnected = "󰤭";
       tooltip-format = "{ipaddr} via {gwaddr}";
+      # nm-applet sits in the tray for the GUI path; this is the
+      # keyboard-friendly one.
+      on-click = "${config.nomarchy.terminal} -e nmtui";
     };
 
     cpu.format = "󰍛 {usage}%";