docs: Update inline code docs for LSP help

sw/desktop/default.nix

@@ -17,25 +17,31 @@ let
   cfg = config.athenix.sw.desktop;
 in
 {
-  options.athenix.sw.desktop = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = ''
-        Enable full desktop environment with KDE Plasma 6.
+  options.athenix.sw.desktop = mkOption {
+    type = lib.types.submodule {
+      options = {
+        enable = mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = ''
+            Enable full desktop environment with KDE Plasma 6.
 
-        Includes:
-        - KDE Plasma 6 desktop with SDDM display manager
-        - Full graphical software suite (Firefox, Chromium, LibreOffice)
-        - Printing and scanning support (CUPS)
-        - Virtualization (libvirt, virt-manager)
-        - Bluetooth and audio (PipeWire)
-        - Video conferencing (Zoom, Teams)
+            Includes:
+            - KDE Plasma 6 desktop with SDDM display manager
+            - Full graphical software suite (Firefox, Chromium, LibreOffice)
+            - Printing and scanning support (CUPS)
+            - Virtualization (libvirt, virt-manager)
+            - Bluetooth and audio (PipeWire)
+            - Video conferencing (Zoom, Teams)
 
-        Recommended for: Workstations, development machines, user desktops
-      '';
-      example = true;
+            Recommended for: Workstations, development machines, user desktops
+          '';
+          example = true;
+        };
+      };
     };
+    default = { };
+    description = "Desktop environment configuration (KDE Plasma 6).";
   };
 
   config = mkIf cfg.enable (mkMerge [