docs: Update inline code docs for LSP help

sw/headless/default.nix

@@ -17,23 +17,29 @@ let
   cfg = config.athenix.sw.headless;
 in
 {
-  options.athenix.sw.headless = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = ''
-        Enable minimal headless server configuration.
+  options.athenix.sw.headless = mkOption {
+    type = lib.types.submodule {
+      options = {
+        enable = mkOption {
+          type = lib.types.bool;
+          default = false;
+          description = ''
+            Enable minimal headless server configuration.
 
-        Includes:
-        - SSH server with password authentication
-        - Minimal CLI tools (tmux, man)
-        - Systemd-networkd for networking
-        - No graphical environment
+            Includes:
+            - SSH server with password authentication
+            - Minimal CLI tools (tmux, man)
+            - Systemd-networkd for networking
+            - No graphical environment
 
-        Recommended for: Servers, containers (LXC), WSL, remote systems
-      '';
-      example = true;
+            Recommended for: Servers, containers (LXC), WSL, remote systems
+          '';
+          example = true;
+        };
+      };
     };
+    default = { };
+    description = "Headless server configuration (SSH, minimal CLI tools).";
   };
 
   config = mkIf cfg.enable (mkMerge [