Make nixos use ghostty module as well

hosts/darwin/home-default.nix

@@ -28,6 +28,12 @@
     package = null;  # Use system Firefox on Darwin
   };
 
+  # Ghostty configuration
+  programs.ghostty-custom = {
+    enable = true;
+    package = null;  # Use Homebrew-installed Ghostty on Darwin
+  };
+
   home.username = "yanlin";
   home.homeDirectory = "/Users/yanlin";
   home.stateVersion = "24.05";

hosts/nixos/thinkpad/home.nix

@@ -10,6 +10,7 @@
     ../../../modules/firefox.nix
     ../../../modules/plasma.nix
     ../../../modules/syncthing.nix
+    ../../../modules/ghostty.nix
     plasma-manager.homeModules.plasma-manager
   ];
   
@@ -19,6 +20,14 @@
     package = pkgs.firefox;
   };
 
+  # Enable Ghostty terminal with NixOS package
+  programs.ghostty-custom = {
+    enable = true;
+    package = pkgs.ghostty;  # Install via nix on NixOS
+    fontSize = 13;
+    windowMode = "fullscreen";
+  };
+
   # Any ThinkPad-specific home configurations can be added here
   # For example, laptop-specific aliases or scripts