Refactor home manager, and add desktop node on sparky.

home/profiles/workstation.nix

@@ -0,0 +1,20 @@
+{ pkgs }:
+let
+  serverProfile = import ./server.nix { inherit pkgs; };
+
+  cliPkgs = with pkgs; [
+    unstable.claude-code
+    unstable.codex
+    unstable.gemini-cli
+  ];
+
+  pythonEnv = pkgs.unstable.python3.withPackages (ps: [
+    ps.google-generativeai
+    ps.ipython
+    ps.llm
+    ps.llm-gemini
+  ]);
+in
+{
+  packages = serverProfile.packages ++ cliPkgs ++ [ pythonEnv ];
+}