Variable ProfileNameForm`Const`

ProfileNameForm: React.FC<
    {
        firstName: string;
        lastName: string;
        onSave: (
            input: { firstName: string; lastName: string },
        ) => Promise<ActionOutcome>;
    },
> = ...

Edit your own first and last name. Save is enabled only once they change.

Seeds from props once; key it on the names to reset after the server normalises them.