The sidebar's visibleChannels filter is keyed on the channelPermissions
Map. Creating a channel raced two state updates: the optimistic create
(added to channels with no permission entry) and the channel_created WS
event (the only thing that set the permission). When the optimistic add
won the race, the WS handler hit its dedup guard, skipped setChannels,
and set the permission by mutating the Map in place — no new reference,
so visibleChannels never recomputed and the channel stayed hidden until
loadSpace rebuilt the maps (i.e. leaving and returning to the space).
Centralize the logic in a new upsertChannel store action that replaces
channels and channelPermissions with fresh references, used by both the
create path and the channel_created handler. Also return the creator's
computed myPermissions (and isPrivate) from POST so the channel renders
immediately from the response, independent of WS timing.
Adds spaceStore.upsertChannel.test.ts covering the reference-identity
regression and the optimistic-reconcile path.
Brings mobile to skeleton parity with desktop. Two mobile-specific renders, plus a fix for the empty-state mascot flashing on every space switch.
- MobileSpacesScreen: shimmer skeleton for the channel list while `useSpaceStore.loadingSpaceId === selectedSpaceId` (uncategorized rows + category header + categorized rows). Mirrors desktop ChannelSidebar's `showChannelSkeleton`. Gated through `useDelayedLoading` so cached/fast loads don't flash the placeholder.
- MobileMembersScreen: shimmer skeleton for the member list (two role-section headers + circular avatars + name bars). Mirrors desktop MemberSidebar's `showMemberSkeleton`.
- Empty-state "No channels yet." mascot was firing on EVERY space switch for ~50–200 ms — `state.channels` only ever holds the most-recently loaded space's channels, so `spaceChannels` filters to `[]` immediately on selection change while `loadSpaceDetail` is still in flight. New `loadedSpaceIds: Set<string>` on useSpaceStore, populated only on `loadSpaceDetail` success and pruned on space removal events. The mascot is now gated on `loadedSpaceIds.has(selectedSpaceId)` so it only fires when the space is *settled* with zero channels.
Reuses the existing `.skeleton` / `.skeleton-bar` / `.skeleton-circle` CSS primitives + `useDelayedLoading` hook (no new shared `<Skeleton />` primitive — sites need row-specific geometry, parameterizing would either over-abstract or duplicate the inline approach).
Specs: docs/systems/mobile-ui.md (Loading Skeletons inventory + per-screen skeleton bullets + settle-gate rationale); docs/systems/spaces.md (Client Load State subsection covering loadingSpaceId vs loadedSpaceIds).
Jannis Braun