Starter prompt

This is Flyer — you pick a night with the group, then it prints the plan. Start me a flyer: ask me what the gathering is and two or three times to poll, then create it. If I paste a group chat, read it and call fillAvailability to fill in who can make what, carrying each person's own words as the `said` field. When a night wins, lockSlot turns the poll into the flyer and a bring-list keeps everyone straight.