feat: 优化会商公开分享页，展示总控结论与各席位交付

公开分享页拆分为落地页与独立报告页，后端补充 consensus_text 与 seat_deliveries 字段。

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

frontend-web/src/App.tsx

@@ -64,11 +64,15 @@ 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. */}
+          {/* Public read-only roundtable share — landing + full result report. */}
           <Route
             path="/roundtable-share/:shareCode"
             element={<PublicRoundtableSharePage />}
           />
+          <Route
+            path="/roundtable-share/:shareCode/report"
+            element={<PublicRoundtableSharePage report />}
+          />
           {/* Public read-only scheduled-task runs viewer — no authentication. */}
           <Route
             path="/public/scheduled-tasks/:taskId"