Fixes a render bug where a federated user (e.g. axel@nova) appeared with
the federation globe icon and a broken avatar when viewed on his own home
instance. Root cause: `populateFromReady` is first-wins by federatedId and
discards the entire skipped DM payload — including its `members` array —
so when a sibling instance's ready arrived first, the home instance's view
of every shared user was dropped on the floor.
Adds a render-only `userViews` cache that mirrors the `dmAlternatives`
philosophy: information from skipped ready payloads is preserved for
rendering. Every wire surface that delivers a User upserts into the cache
regardless of dedup outcome; render sites read through a Zustand selector
hook to surface the home view when one is loaded. The DM channel ingestion
race is left untouched — the existing no-flapping invariant on origin
reconnect is intentional and load-bearing for failover.
Layered changes:
- `identity.ts`: `normalizeOriginToHost`, `canonicalUserKey`,
`isDeliveryFromHome`, `isFederationGlobeApplicable` — single helpers
for origin/host normalization and the home/stub tier decision.
- `spaceStore.ts`: `userViews` Map, `UserViewEntry` type, `upsertUserView`
action with the home-wins preference rule, prune by `deliveredBy` in
`removeInstanceSpaces` (mirrors `dmAlternatives` cleanup), `reset`
clears.
- `userViewLookup.ts`: `useCanonicalUserView` (Zustand selector hook for
React) + `getCanonicalUserView` (sync getter for non-React paths).
Render reactivity is structural via the selector, not coincidence on
legacy update paths.
- `populateFromReady` upsert pass runs BEFORE the federatedId dedup so
members of skipped DMs still reach the cache.
- WS handlers (dm_message_*, message_*, user_updated, member_joined,
friend_request_*, dm_channel_created, dm_member_added) and REST
hydrators (socialStore, discoverStore, mutuals) feed the cache with
their delivering origin.
- Render-site routing through `useCanonicalUserView` at every audited
user-rendering site (sidebar, header, search, message bubble, reply
chips, profile popout/modal, group settings, voice tiles, mention
chips, member lists, friends, invites). Self-rendering sites compose
alongside via existing `isSelf`/`resolveDisplayIdentity`.
- Globe predicate hoisted to `isFederationGlobeApplicable` and applied
at three sites, gating on `domain !== window.location.host` so we
never show the globe for users whose home IS our own.
Tests: 31 new unit tests across `identity`, `userViews` store, and
`userViewLookup`. Full suite 276/276.
Docs: `client-federation.md` §3 gains a "User View Cache" section
parallel to "DM Origin Failover"; `dm-system.md` notes the new store
action and WS handler upserts.
Bug 3 (federation profile-sync gap — orbit's stale profile data on
nova-Axel after a clear/color-change on nova never propagated)
remains open. The user-view cache routes around it for the common case
(home instance is connected), but the underlying S2S relay gap is its
own diagnosis and follows in a separate branch.
DmLastMessagePreview lacked a `type` field, so the sidebar rendered
`lastMessage.content` verbatim — surfacing JSON like
`{"event":"space_invite",...}` for space invites and member-add events.
Adds `type` to the preview payload (populated server-side from
`dm_messages.type`) and routes all sidebar call sites through a single
`formatDmSidebarPreview` helper that renders human-readable text for
each system event and skips the group `Sender:` prefix on system rows.
dm-system.md: fold the voice.md cross-reference into the paragraph so it
renders as part of the Cross-instance access explanation instead of an
orphaned bullet.
websocket.md: add 'host_unreachable' to the dm_call_undeliverable phase
union — stale since #32 was merged (docs drift noted in Task 8 review).
federation.md — new undeliverable bucket subsection with three-way
classification table, Path A/B semantics, and wire backward-compat note.
voice.md — no_recipient row in failure-surface table.
websocket.md — DmCallUndeliverableReason union updated to include no_recipient.
dm-system.md — cross-reference to voice.md for no_recipient reason.
New subsection under client-federation.md's origin-aware routing section
covering dmAlternatives, failoverDmOriginsFromDisconnected, rekey flow,
trigger points, the intentional cache-flush trade-off, voice-out-of-scope,
no-re-home policy, and the WS routing contract. dm-system.md gets a
one-line cross-reference from the Client routing bullet.
processMemberAddEvent, processMemberRemoveEvent, and processOwnershipTransferEvent inserted system messages unconditionally. Outbox retries and initial-sync replays (triggered whenever an admin re-approves a peering request, which recreates the peer row with lastSyncedAt=0) duplicated the system message on every delivery. Each new snowflake ID exceeded the user's last_read_message_id, flipping the channel back to unread after every deploy.
Processors now short-circuit on a matching (source_instance, source_message_id) row, and persist those fields when inserting. processMemberAddEvent emits the tagged system message in both bootstrap and incremental paths so bootstrap replays don't fall through and insert a second one; the bootstrap's dm_channel_created broadcast carries that message as lastMessage so sidebar previews and unread anchors agree across instances.
Remove the owner-only gate on POST /api/dm/:id/members. The S2S relay
already accepts member_add from any HMAC-verified peer, and the UI
already shows the add button to all group DM members. Only the
server-side check was blocking non-owners.
Add federation.md section 8b covering dm_close/dm_reopen relay events:
payload, outbound queueing via queueDmCloseRelay, inbound processDmCloseEvent/
processDmReopenEvent handlers (lookup-only identity resolution, silent
no-ops on missing channel/user/membership), and the processCreateEvent
closed-state reopen bug fix.
Update dm-system.md soft-close section with federation behaviour: relay
to peers for both close and reopen, relayed-message reopen in
processCreateEvent, and the federatedId-only guard for legacy DMs.
Jannis Braun