Drag to reschedule with attendee notice

Built and shipped on NoCode Outlaws. Stack-agnostic.

Decide per client

1. Which item types live on the calendar (sessions, group events, 1:1 bookings, posts...).
2. Who is "attached" to each type (enrolled students, members with access, the booker, nobody).
3. Channels available: email, in-app inbox, SMS.
4. Who the default message points to ("contact your mentor", "contact support").

Behavior

• Admin month grid. Future items of draggable types get draggable=true and a grab cursor. Past items, open slots and published posts do not drag. Dropping onto a past day is ignored.
• Drop opens a dialog: title, new date (prefilled with the drop day), time (prefilled with the original time, editable), and if anyone is attached: "N [people] are attached. Send them a note?"
• Send the standard message (shown as a live preview that updates with date and time): "[Event] has been rescheduled to [new date and time]. Contact your mentor for more details."
• Write my own message (textarea with AI help button).
• Move it quietly, no message.
• Send by: Email (with calendar update) and Site inbox, both checked by default, hidden when quiet.
• Pluralize properly: "1 enrolled student is" vs "2 enrolled students are".
• Posts: no people block; show "Publish automatically at this time" checkbox instead.
• Mobile shows an agenda list, so no drag there; editing the item's form is the phone path.

Server rules

• Keep duration: shift end by the same delta as start. Convert fro