It seems that none of the three options is correct. You cannot use "would have", either, because this verb tense [future in the past] is used in conditional sentences, [type II] , in reported speech as a past equivalent of the simple future tense , in past routines, and after the verb "wish".
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Future in the past is only used in conditional sentences?? Where did you get this from??
Actually, you contradict yourself. You wrote that, "Future in the past is used...as a past equivalent of the simple future tense." Doesn't this apply to Daiana's sentence, too?
As far as I know, future in the past is used to express the idea that in the past you thought something would happen in the future.