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Vitor PamplonaandClaude Opus 4.8
2b4148ef19
Concord channels only showed the recent tail the relay served for the
channel plane and never loaded older messages on scroll. Add backward
`until`+`limit` paging, per relay, on demand — the same model as the
NIP-04 per-conversation history.
Reuses the shared paging stack as-is (BackwardRelayPager,
RelayLoadingCursors, the RelayReach* markers/sentinels and
DmHistoryLoadingCard); only the Concord-specific data layer is new:
- ConcordChannel holds a per-channel RelayLoadingCursors (`history`), so
cursors share the channel's cache lifetime.
- ConcordChannelHistory{FilterAssembler,SubAssembler} binds a pager to the
open channel, builds `{kinds:[1059], authors:[planePk], until, limit}`
per armed relay, and forwards relay callbacks; registered in
RelaySubscriptionsCoordinator and mounted by the channel screen.
- ConcordCommunitySession.channelPlaneAddress() resolves a channel's REQ
author from the fold.
- ConcordChannelScreen wires the olderBoundary/markersInGap/sentinels feed
hooks and bootstraps an empty channel.
The history floor is `now` (not the DM 7-day tail): the Concord live sub
isn't a strict recent-tail (it asks the plane author unbounded and the
relay caps the result), so paging must walk the whole history from the top
to reach recent-but-capped messages. Overlap with the live tail is
harmless — wraps dedup by id on ingest.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>