[cleo] claude config + new packages

cleo.darwin.nix

@@ -71,9 +71,13 @@ in
     ttyd
     xcodes
     xz
-    # node 22 pinned to the exact version cleo-app requires (nixpkgs-nodejs in flake.nix)
-    pinnedNode.nodejs_22
-    pinnedNode.yarn
+    # node 24.x from unstable (cached); the pinnedNode 24.19.0 rev had no cache.nixos.org binaries
+    unstable.nodejs_24
+    unstable.yarn
+    # iOS simulator UI driving (tap/scroll/type) for screenshots and e2e flows
+    unstable.maestro
+    unstable.idb-companion
+    act
   ];
 
   # Add Homebrew to PATH
@@ -147,6 +151,16 @@ in
     );
   };
 
-  nix.settings.experimental-features = "nix-command flakes";
+  nix = {
+    settings = {
+      experimental-features = "nix-command flakes";
+      auto-optimise-store = true;
+    };
+    gc = {
+      automatic = true;
+      interval = { Weekday = 0; Hour = 2; Minute = 0; }; # Sunday at 2:00 AM
+      options = "--delete-older-than 7d";
+    };
+  };
   system.stateVersion = 4;
 }