feat: drop moonlock and moonset

The power menu is a Quickshell popout in the moonarch config now, and it
was the last caller of moonlock. Inputs, package entries and both build
recipes are gone, together with the generated /etc configs and the
moonlock PAM stack — swaylock's comes from programs.niri.enable.

modules/desktop.nix

@@ -66,18 +66,6 @@ in
     # stasis reads /etc/stasis/ as its system-wide fallback, never /etc/xdg/.
     "stasis/stasis.rune".source = "${xdg}/stasis/stasis.rune";
 
-    # moonlock and moonset fall back to /usr/share/moonarch/wallpaper.jpg,
-    # which does not exist here, so the wallpaper is pointed at the store path
-    # explicitly. Both read these files as their system-wide config.
-    "moonlock/moonlock.toml".text = ''
-      background_path = "${wallpaper}"
-    '';
-    # blur matches the value set in ~/.config/moonset/moonset.toml on Arch.
-    "moonset/moonset.toml".text = ''
-      background_path = "${wallpaper}"
-      background_blur = 20.0
-    '';
-
     # Configs outside /etc/xdg/ in the Arch package as well.
     "mpv/mpv.conf".source = "${etc}/mpv/mpv.conf";
     "xdg-desktop-portal/niri-portals.conf".source =
@@ -157,15 +145,11 @@ in
 
   environment.systemPackages = with pkgs; [
     # Own programs
-    moonarchPkgs.moonset
     moonarchPkgs.sweet-cursors
     moonarchPkgs.stasis
     moonarchPkgs.moonarch-scripts
-    # Only still installed because moonset's Lock action invokes moonlock by
-    # name and has no lock_command option. Idle and lid-close use swaylock.
-    moonarchPkgs.moonlock
 
-    # Session lock
+    # Session lock. The power menu is a Quickshell popout, not a package.
     swaylock
 
     # Compositor extras
@@ -244,10 +228,4 @@ in
     "C %h/.config/waypaper/config.ini 0644 - - - ${waypaperConfig}"
     "C %h/.config/swaylock/config 0644 - - - ${swaylockConfig}"
   ];
-
-  # PAM stack for moonlock, shipped by the package but owned by the system.
-  # swaylock needs none of this: programs.niri.enable brings
-  # security.pam.services.swaylock with it. Goes away with moonlock.
-  security.pam.services.moonlock.text =
-    builtins.readFile "${moonarchPkgs.moonlock}/share/moonlock/moonlock-pam";
 }