Make Entire "Add a Message for the Restaurant" Button Clickable in the Cart

Is your feature request related to a problem? Please describe.
In the Enatega app (Cart section), the "Add a message for the restaurant" button should be fully clickable, not just the arrow icon. This enhancement would make the entire button area responsive, improving user experience and accessibility.

Describe the solution you'd like

Currently, only the arrow icon next to the "Add a message for the restaurant" option is clickable.
The entire button, including the text and arrow, should be clickable, allowing users to easily add a message for the restaurant when reviewing their cart.
This change would ensure a smoother, more intuitive interaction, reducing the chances of misclicking and improving the overall user experience.

Inspect the Cart section of the Enatega app and find the existing click handler attached to the arrow beside “Add a message for the restaurant.” Make the full button area, including its text and arrow, trigger the same action. Done means users can open the restaurant-message flow by clicking anywhere in the button area.

索引モデルが issue の本文から書いたものです。