chore: update agent harness and config

modules/darwin/home/programs/aerospace/user-settings.nix

@@ -26,9 +26,11 @@
   exec-on-workspace-change = [ "flatten-workspace-tree" ];
 
   on-window-detected = [
-    # Default: force all windows to tile
+    # Codex /pet opens an auxiliary window that should not enter the tiling tree.
     {
-      run = "layout tiling";
+      "if".app-id = "com.openai.codex";
+      "if".window-title-regex-substring = "pet|hatch";
+      run = "layout floating";
     }
     # Exception: Kitty on workspace 5 floats
     {

modules/darwin/homebrew.nix

@@ -36,7 +36,6 @@ in
         "spotify"
         "vesktop"
         "obs"
-        "neohtop"
         "orbstack"
         "openvpn-connect"
       ];