When typing a long message in the chat input field on mobile devices, the message becomes visually truncated after reaching a certain height. The input area stops expanding and the remaining text becomes difficult to read or edit. This creates a poor user experience, especially when users are composing long prompts or editing previously written content.

Currently, the input field appears to have a maximum height limit. Once the content exceeds this limit, the input area does not expand further and the text becomes partially hidden within the container. On smaller mobile screens, this makes it difficult for users to review or modify the full message before sending.

To improve usability, an expand (fullscreen) option could be added to the input field. When the message exceeds a certain height, an expand button/icon can appear that allows the user to open a larger editor or fullscreen input view. This would allow users to comfortably read, edit, and manage long messages.