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/App.tsx

@@ -17,6 +17,7 @@ import LoginPage from "./pages/LoginPage";
 import PageRoutes from "./pages/PageRoutes";
 import PublicScheduledTaskPage from "./pages/PublicScheduledTaskPage";
 import PublicSharePage from "./pages/PublicSharePage";
+import PublicRoundtableSharePage from "./pages/PublicRoundtableSharePage";
 import EmbedChatPage from "./pages/EmbedChatPage";
 import { ChatRuntime } from "./pages/WorkspaceRoutes";
 import { NotFoundPage } from "./pages/NotFoundPage";
@@ -63,6 +64,11 @@ export function App() {
           <Route path="/landing" element={<LandingPage />} />
           {/* Public read-only conversation viewer — no authentication. */}
           <Route path="/share/:shareCode" element={<PublicSharePage />} />
+          {/* Public read-only roundtable result viewer — no authentication. */}
+          <Route
+            path="/roundtable-share/:shareCode"
+            element={<PublicRoundtableSharePage />}
+          />
           {/* Public read-only scheduled-task runs viewer — no authentication. */}
           <Route
             path="/public/scheduled-tasks/:taskId"