feat: Integrate forum layout support across various components and enhance room handling logic

src/app/features/lobby/Lobby.tsx

@@ -40,7 +40,8 @@ import { getSpaceRoomPath } from '../../pages/pathUtils';
 import { StateEvent } from '../../../types/matrix/room';
 import { CanDropCallback, useDnDMonitor } from './DnD';
 import { ASCIILexicalTable, orderKeys } from '../../utils/ASCIILexicalTable';
-import { getStateEvent } from '../../utils/room';
+import { getStateEvent, shouldShowForumLobby } from '../../utils/room';
+import { ForumSpaceShell } from '../forum/ForumSpaceShell';
 import { useClosedLobbyCategoriesAtom } from '../../state/hooks/closedLobbyCategories';
 import {
   makeCinnySpacesContent,
@@ -149,7 +150,19 @@ const useCanDropLobbyItem = (
   return canDrop;
 };
 
+function ForumSpaceLobby() {
+  return <ForumSpaceShell />;
+}
+
 export function Lobby() {
+  const space = useSpace();
+  if (shouldShowForumLobby(space)) {
+    return <ForumSpaceLobby />;
+  }
+  return <SpaceCardLobby />;
+}
+
+function SpaceCardLobby() {
   const navigate = useNavigate();
   const mx = useMatrixClient();
   const mDirects = useAtomValue(mDirectAtom);