feat: release hand endpoint & button

routes/login_page.go

@@ -227,8 +227,10 @@ func joinRoomHandler(templateFs *embed.FS,
 				Id:           rooms.RandomPersonId(),
 			}
 			err := roomsM.Update(context.TODO(), room.Name, func(fromRoom rooms.Room) (toRoom rooms.Room) {
+				log.Printf("/login/join about to modify room %+v", fromRoom)
 				toRoom = fromRoom
 				toRoom.AllKnownPeople = append(toRoom.AllKnownPeople, person)
+				log.Printf("/login/join will save %+v", toRoom)
 				return toRoom
 			})
 			if err != nil {
@@ -244,6 +246,7 @@ func joinRoomHandler(templateFs *embed.FS,
 		// and we've checked password
 
 		err = roomsM.Update(context.TODO(), room.Name, func(fromRoom rooms.Room) (toRoom rooms.Room) {
+			toRoom = fromRoom
 			toRoom.Paricipants = append(toRoom.Paricipants, person.Id)
 			return toRoom
 		})