Improve tracking of animated components. (#12618)

packages/cli/src/ui/debug.ts

@@ -0,0 +1,11 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// A top-level field to track the total number of active animated components.
+// This is used for testing to ensure we wait for animations to finish.
+export const debugState = {
+  debugNumAnimatedComponents: 0,
+};