fix(channels): collapse /channels/ index into one mobile pane and add Create-community CTA next to Find-community on empty state

src/app/components/page/Page.tsx

@@ -78,8 +78,8 @@ export function PageRoot({ nav, children }: PageRootProps) {
             TL/BL carves expose the outer's void. The explicit
             Background bg on the inner is what keeps the panel's
             apparent colour unchanged for routes whose content has no
-            opaque bg of its own (e.g. ChannelsLanding) — without it
+            opaque bg of its own — without it the outer void would
-            the outer void would bleed through. */}
+            bleed through. */}
         <Box grow="Yes" style={{ minWidth: 0, backgroundColor: VOJO_HORSESHOE_VOID_COLOR }}>
           <Box
             grow="Yes"

src/app/pages/Router.tsx

@@ -54,12 +54,7 @@ import { ClientBindAtoms, ClientLayout, ClientRoot } from './client';
 import { HomeRouteRoomProvider } from './client/home';
 import { Direct, DirectCreate, DirectRouteRoomProvider } from './client/direct';
 import { BotExperienceHost, Bots } from './client/bots';
-import {
+import { Channels, ChannelsRootNav, ChannelPickPlaceholder } from './client/channels';
-  Channels,
-  ChannelsRootNav,
-  ChannelPickPlaceholder,
-  ChannelsLanding,
-} from './client/channels';
 import { RouteSpaceProvider, Space, SpaceRouteRoomProvider, SpaceSearch } from './client/space';
 import { Explore, FeaturedRooms, PublicRooms } from './client/explore';
 import { setAfterLoginRedirectPath } from './afterLoginRedirectPath';
@@ -302,7 +297,7 @@ export const createRouter = (clientConfig: ClientConfig, screenSize: ScreenSize)
                   </MobileFriendlyPageNav>
                 }
               >
-                <ChannelsLanding />
+                {mobile ? null : <WelcomePage />}
               </PageRoot>
             }
           />

src/app/pages/client/channels/Channels.tsx

@@ -4,24 +4,31 @@ import { PageNav, PageNavContent } from '../../../components/page';
 import { StreamHeader } from '../../../components/stream-header';
 import { ChannelsList } from './ChannelsList';
 import { ChannelCreateRow } from './ChannelCreateRow';
+import { ChannelsLanding } from './ChannelsLanding';
 import { ChannelsWorkspaceHorseshoe } from './ChannelsWorkspaceHorseshoe';
 import { WorkspaceFooter } from './WorkspaceFooter';
 import { ACTIVE_SPACE_KEY } from './useActiveSpace';
 
 // Index route at /channels/ (no space selected). Renders the shared
-// StreamHeader so the segment switcher is consistent across surfaces,
+// StreamHeader (segment switcher) plus the resolve-active-space-or-
-// but no list/footer — those need a Space context.
+// show-empty-state body — same pattern as Direct's nav owning its own
+// empty state. Keeping the landing inside the nav avoids rendering it
+// as a sibling pane: on mobile both would collide into one screen, and
+// on desktop the redirect logic would fire twice if mounted twice.
+//
+// `<ChannelsLanding />` is mounted **directly** as the curtain's flex
+// child (NOT wrapped in `PageNavContent`). `NavEmptyCenter` relies on
+// `flexGrow:1 + justifyContent:Center` for vertical centering — the
+// curtain stage is `display:flex; flex-direction:column`, so direct
+// mount gives the empty state the height it needs to center. Wrapping
+// it in `PageNavContent` (block layout inside Scroll) would collapse
+// the centering to top-aligned. Same idiom as `Direct.tsx::DirectEmpty`.
 export function ChannelsRootNav() {
   const scrollRef = useRef<HTMLDivElement>(null);
   return (
     <PageNav resizable surface="surfaceVariant">
       <StreamHeader scrollRef={scrollRef}>
-        <PageNavContent scrollRef={scrollRef}>
+        <ChannelsLanding />
-          {/* Empty list slot is intentional: StreamHeader needs a real
-              scroll target on this route for its touch gesture even
-              though there's no list yet. */}
-          <div />
-        </PageNavContent>
       </StreamHeader>
     </PageNav>
   );

src/app/pages/client/channels/ChannelsLanding.tsx

@@ -6,6 +6,7 @@ import { Box, Button, Icon, Icons, Text } from 'folds';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
 import { allRoomsAtom } from '../../../state/room-list/roomList';
 import { useOrphanSpaces } from '../../../state/hooks/roomList';
+import { useOpenCreateSpaceModal } from '../../../state/hooks/createSpaceModal';
 import { roomToParentsAtom } from '../../../state/room/roomToParents';
 import { getCanonicalAliasOrRoomId } from '../../../utils/matrix';
 import { getChannelsSpacePath, getExplorePath } from '../../pathUtils';
@@ -19,6 +20,7 @@ export function ChannelsLanding() {
   const mx = useMatrixClient();
   const { t } = useTranslation();
   const navigate = useNavigate();
+  const openCreateSpaceModal = useOpenCreateSpaceModal();
   const roomToParents = useAtomValue(roomToParentsAtom);
   const orphanSpaces = useOrphanSpaces(mx, allRoomsAtom, roomToParents);
   const activeSpaceId = useActiveSpace(orphanSpaces);
@@ -49,6 +51,16 @@ export function ChannelsLanding() {
                 {t('Channels.explore_cta')}
               </Text>
             </Button>
+            <Button
+              variant="Secondary"
+              fill="Soft"
+              size="300"
+              onClick={() => openCreateSpaceModal()}
+            >
+              <Text size="B300" truncate>
+                {t('Channels.workspace_switcher_create_space')}
+              </Text>
+            </Button>
           </Box>
         }
       />

src/app/pages/client/channels/index.ts

@@ -1,5 +1,4 @@
 export * from './Channels';
 export * from './ChannelsList';
-export * from './ChannelsLanding';
 export * from './ChannelPickPlaceholder';
 export * from './useActiveSpace';