Offer a locked-in annual rate for trials that convert this month

Set an offer for trial accounts still active in their final week: lock the current annual price for 12 months if they convert before the trial expires. State the exact expiration date in the email and on the in-app banner, and remove the offer automatically once the trial closes.

Why it works: A time-bound rate lock gives an undecided account a clear reason to decide now instead of letting the trial lapse.