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>

themes/summer-day/waybar.css

@@ -49,6 +49,7 @@ window#waybar {
 #pulseaudio,
 #network,
 #battery,
+#tray,
 #custom-powermenu {
   background-color: @bg0;
   color: @fg;

themes/summer-night/waybar.css

@@ -53,8 +53,9 @@ window#waybar {
 #clock.date,
 #workspaces,
 #pulseaudio,
+#network,
 #idle_inhibitor,
-#custom-battery,
+#battery,
 #custom-powermenu {
   background-color: @bg0;
   color: @fg;
@@ -98,7 +99,6 @@ window#waybar {
   margin-left: 15px;
   padding-left: 20px;
   padding-right: 21px;
-  font-family: Nomarchy;
   font-size: 20px;
 }
 
@@ -112,7 +112,7 @@ window#waybar {
   padding-right: 23px;
 }
 
-#custom-battery.preservation {
+#battery.charging {
   color: @green;
 }