The Purchase Code Input screen

This dialog window provides the ability to activate premium features using a code.

• Top section: displays the header "Purchase Code".

• Middle section: text field for code input.
  When entering an incorrect code, the field is highlighted in red, and an error message is displayed below it.

• Bottom section:

• "Cancel" button — closes the dialog without applying changes.
• "Ok" button — performs validation of the entered code.
  If the code is valid, the corresponding products appear in the
  "Purchased premium features" section on the Premium Features screen.

If the code is incorrect and the field is highlighted in red, the "Ok" button will be disabled.