Pressing shift enter should create a newline in the prompt, but instead just submits it

What version of Codex is running?

codex-cli 0.64.0-alpha.5

What subscription do you have?

chatgpt-pro

Which model were you using?

_No response_

What platform is your computer?

_No response_

What issue are you seeing?

I would expect hitting shift enter to create a new line when writing a prompt, but it instead just submits the current prompt.

What steps can reproduce the bug?

Uploaded thread: 019ab6bf-7299-7ce2-b832-41955d5e26d6

What is the expected behavior?

_No response_

Additional information

_No response_