Business Problem:

The email reply composer currently occupies a fixed, relatively narrow width regardless of screen size. Agents using smaller monitors (e.g. 13" laptop screens) find the composer cramped, making it harder to read and compose emails comfortably.

Desired Outcome:

The composer expands to use roughly 80% of the available window width (scaling with screen size), giving agents on smaller displays a more readable, comfortable writing area.

Use Cases:

An agent on a 13" laptop replies to a long email and has to scroll/squint through a narrow column instead of reading it naturally.

Agents on small external monitors face the same readability issue during high-volume email support.