refactor: rework NixOS desktop module

hosts/luci/nixos-config.nix

@@ -1,4 +1,5 @@
 { ... }: {
+  config.modules.desktop.sway.enable = true;
   config.modules.gaming.steam.enable = false;
   config.modules.hardware.laptop.enable = true;
 }

modules/nixos/default.nix

@@ -1,6 +1,7 @@
 _:
 {
   imports = [
+    ./desktop/sway
     ./gaming/steam
     ./hardware/laptop
   ];

modules/nixos/desktop/sway/default.nix

@@ -0,0 +1,35 @@
+{ pkgs, lib, config, ... }:
+with lib;
+let
+  cfg = config.modules.desktop.sway;
+in
+{
+  options.modules.desktop.sway = {
+    enable = mkEnableOption "Enable Steam Platform";
+  };
+  config = mkIf cfg.enable {
+    security.pam.services.swaylock = {};
+    security.rtkit.enable = true;
+    services.pipewire = {
+      enable = true;
+      alsa.enable = true;
+      alsa.support32Bit = true;
+      pulse.enable = true;
+    };
+    xdg.portal = {
+      enable = true;
+      wlr.enable = true;
+      # gtk portal needed to make gtk apps happy
+      extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
+      config = {
+        common = {
+          default = [
+            "gtk"
+          ];
+          "org.freedesktop.impl.portal.ScreenCast" = "wlr";
+          "org.freedesktop.impl.portal.Screenshot" = "wlr";
+        };
+      };
+    };
+  };
+}

nixos/default.nix

@@ -1,28 +1,19 @@
 { pkgs, lib, stateVersion, hostname, username, hostConfig, ... }:
 {
-  imports =
-    [ # Include the results of the hardware scan.
-      ../hosts/${hostname}/hardware-configuration.nix
-      ../hosts/${hostname}/nixos-config.nix
-      ../modules/nixos
-      ./includes/hardware/bootloader.nix
-      ./includes/system/locales.nix
-      ./includes/system/flakes.nix
-      ./includes/system/user.nix
-      ./includes/system/udisks2.nix
-      ./includes/system/lvm.nix
-      ./includes/system/doas.nix
-      ./includes/system/neovim.nix
-      ./includes/system/overlay.nix
-    ] ++ (
-      if hostConfig.desktop then 
-        [
-          ./includes/desktop/swaylock.nix
-          ./includes/desktop/pipewire.nix
-          ./includes/desktop/xdg-portal.nix
-        ]
-      else []
-    );
+  imports = [ # Include the results of the hardware scan.
+    ../hosts/${hostname}/hardware-configuration.nix
+    ../hosts/${hostname}/nixos-config.nix
+    ../modules/nixos
+    ./includes/hardware/bootloader.nix
+    ./includes/system/locales.nix
+    ./includes/system/flakes.nix
+    ./includes/system/user.nix
+    ./includes/system/udisks2.nix
+    ./includes/system/lvm.nix
+    ./includes/system/doas.nix
+    ./includes/system/neovim.nix
+    ./includes/system/overlay.nix
+  ];
 
 
   nixpkgs.config.allowUnfree = true;