refactor: move 'wlsunset' package into home manager module

home/modules/desktop/niri/default.nix

@@ -1,8 +1,13 @@
+{ pkgs, ... }:
+
 {
   imports = [
     ../../fuzzel
     ../../waybar
   ];
 
-  home.file.".config/niri/config.kdl".source = ./config.kdl;
+  home = {
+    file.".config/niri/config.kdl".source = ./config.kdl;
+    packages = with pkgs; [ wlsunset ];
+  };
 }

modules/desktops/niri/default.nix

@@ -1,5 +1,3 @@
-{ pkgs, ... }:
-
 {
   programs.niri.enable = true;
 
@@ -7,6 +5,4 @@
   xdg = {
     portal.enable = true;
   };
-
-  environment.systemPackages = with pkgs; [ wlsunset ];
 }