Feature: click-to-copy functionality for question text

[Huan Xu]

Issue Description:

Currently, users must manually select and copy the text of generated questions to use them outside the platform. This process can be time-consuming and inconvenient, especially for users who frequently work with multiple questions. To enhance the user experience and streamline this process, I propose the addition of a click-to-copy feature that allows users to effortlessly copy the text of a question to their clipboard with a single click.