add wallpapers to assets, fix nh cleaning job, reenable stylix

modules/hosts/kitagawa/kitagawa.nix

@@ -23,7 +23,10 @@
     features = {
       nixos = {
         home-manager.enable = true;
-        stylix.enable = false;
+        stylix = {
+          enable = true;
+          image = builtins.path { path = "${self}/assets/wallpapers/rei-aquarium.jpg"; };
+        };
       };
 
       shells.zsh.antidote.enable = true;
@@ -49,7 +52,10 @@
 
         cli = {
           fastfetch.enable = true;
-          nh.enable = true;
+          nh = {
+            enable = true;
+            clean.enable = true;
+          };
         };
 
         extraPackages = with pkgs; [
@@ -59,7 +65,9 @@
       };
     };
 
-    stylix.targets.nixos-icons.enable = false;
+    stylix.targets = {
+      nixos-icons.enable = false;
+    };
 
     nix.buildMachines = [
       {