Re-land bbiggs changes to reduce margin on narrow screens with fixes + full width setting (#10522)

packages/cli/src/utils/math.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * Linearly interpolates between two values.
+ *
+ * @param start The start value.
+ * @param end The end value.
+ * @param t The interpolation amount (typically between 0 and 1).
+ */
+export const lerp = (start: number, end: number, t: number): number =>
+  start + (end - start) * t;