Presence (kind-10312) was being stored in both `channel.notes` and the
`presenceNotes` index. The mixed-kind `notes` map is dominated by chat
in active rooms, and only HomeLiveFilter still read presence from it --
which is now migrated to scan presenceNotes directly.
- LocalCache.consume(MeetingRoomPresenceEvent): drop the `channel.addNote`
call; only addPresenceNote, plus addRelay so the channel's relay-counter
still tracks where presence arrived from.
- LiveActivitiesChannel: addPresenceNote / removePresenceNote emit on
flowSet.notes so reactive observers (NestsFeedLoaded) still update.
- HomeLiveFilter.shouldIncludeChannel: scan presenceNotes separately for
follow-broadcast detection in audio rooms (chat scan unchanged).
- HomeLiveFilter.followsThatParticipateOn: also count presenceNotes
authors so audio-room hosts/speakers factor into the participation
sort even when they haven't chatted.
- ChannelFeedFilter: delete the isChatEvent workaround that was excluding
presence from the chat feed -- presence no longer lands there.
Claude
566133750b