feat: 多智能体会商草稿分享（import 复制 / view 公开结果页）

支持会商草稿生成分享码、导入副本与公开只读结果页，并在侧边栏展示最近会商记录。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend-web/src/components/workspace/workspace-sidebar.tsx

@@ -12,6 +12,7 @@ import { useTheme } from "@/contexts/ThemeContext";
 import { cn } from "@/lib/utils";
 
 import { RecentChatList } from "./recent-chat-list";
+import { RecentRoundtableList } from "./recent-roundtable-list";
 import { RecentWritingList } from "./recent-writing-list";
 import { WorkspaceHeader } from "./workspace-header";
 import { WorkspaceNavChatList } from "./workspace-nav-chat-list";
@@ -46,6 +47,7 @@ export function WorkspaceSidebar({
         <SidebarContent>
           <WorkspaceNavChatList showCollapseTrigger={compactChrome} />
           {isSidebarOpen && <RecentChatList />}
+          {isSidebarOpen && <RecentRoundtableList />}
           {isSidebarOpen && <RecentWritingList />}
         </SidebarContent>
         {!compactChrome && (