refactor: Move sw into properly nested modules with unconditional import

sw/stateless-kiosk/default.nix

@@ -7,37 +7,77 @@
   inputs,
   ...
 }:
-lib.mkMerge [
-  (import ./kiosk-browser.nix {
-    inherit
-      config
-      lib
-      pkgs
-      inputs
-      ;
-  })
-  (import ./services.nix {
-    inherit
-      config
-      lib
-      pkgs
-      inputs
-      ;
-  })
-  (import ./net.nix {
-    inherit
-      config
-      lib
-      pkgs
-      inputs
-      ;
-  })
-  (import ./programs.nix {
-    inherit
-      config
-      lib
-      pkgs
-      inputs
-      ;
-  })
-]
+
+with lib;
+
+let
+  cfg = config.athenix.sw.stateless-kiosk;
+in
+{
+  options.athenix.sw.stateless-kiosk = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Enable stateless kiosk mode for diskless PXE boot systems.
+
+        Includes:
+        - Sway (Wayland compositor)
+        - Chromium in fullscreen kiosk mode
+        - MAC address-based URL routing
+        - Network-only boot (no local storage)
+        - Auto-start browser on boot
+
+        Recommended for: Assembly line stations, diskless kiosks, PXE boot displays
+      '';
+      example = true;
+    };
+
+    kioskUrl = mkOption {
+      type = types.str;
+      default = "https://ha.factory.uga.edu";
+      description = ''
+        Default URL to display in the kiosk browser.
+
+        Note: For stateless-kiosk, MAC address-based routing may override this.
+        See sw/stateless-kiosk/mac-hostmap.nix for MAC-to-URL mappings.
+      '';
+      example = "https://homeassistant.lan:8123/lovelace/dashboard";
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (import ./kiosk-browser.nix {
+      inherit
+        config
+        lib
+        pkgs
+        inputs
+        ;
+    })
+    (import ./services.nix {
+      inherit
+        config
+        lib
+        pkgs
+        inputs
+        ;
+    })
+    (import ./net.nix {
+      inherit
+        config
+        lib
+        pkgs
+        inputs
+        ;
+    })
+    (import ./programs.nix {
+      inherit
+        config
+        lib
+        pkgs
+        inputs
+        ;
+    })
+  ]);
+}