fix(stylix): generate system cursor in NixOS module

The NixOS stylix module defined cfg.cursor but omitted stylix.cursor in the config block. This prevented Stylix from configuring the system-wide cursor, causing GDM/GNOME on bruddynix to render a white box cursor since the system environment lacked the Catppuccin fallback cursor before Home Manager dconf settings fully applied.

Author: khaneliman

modules/nixos/theme/stylix/default.nix

@@ -52,6 +52,10 @@ in
         gtk.enable = !config.khanelinix.theme.gtk.enable;
         qt.enable = !config.khanelinix.theme.qt.enable;
       };
+
+      cursor = lib.mkIf pkgs.stdenv.hostPlatform.isLinux {
+        inherit (cfg.cursor) name package size;
+      };
     };
   };
 }