Password protected form: Add wp-element-button class to the submit input

[andersnoren]

What problem does this address?

When you set a page/post to be password protected, the "This content is password protected" form shown on the page includes a <input type="submit"> button without the wp-element-button class. That means that the button doesn't match the button styles set by the theme in theme.json, or by the user in the site editor.

What is your proposed solution?

Add the wp-element-button class to the <input type="submit"> element in the password protected form.

Twenty Twenty-Four currently	TT4 with the class added

[Mamaduka]

I believe the markup comes from the get_the_password_form() function. The block editor either has to filter its output or handle password-protected content.