fix: keep presenter pairing visible in Q&A

web/apps/console/src/presentation/presenter/PresenterNavigationBar.tsx

@@ -4,7 +4,7 @@ import { PresentationPairingPanel } from "../sync/PresentationPairingPanel.js";
 import type { PresentationSyncController } from "../sync/presentation-sync-state.js";
 
 type PresenterNavigationBarProps = {
-  readonly currentIndex: number;
+  readonly currentIndex: number | null;
   readonly total: number;
   readonly previous: PresenterBeatNote | null;
   readonly next: PresenterBeatNote | null;
@@ -19,7 +19,7 @@ const DirectionLink = ({ note, children }: { readonly note: PresenterBeatNote |
 export const PresenterNavigationBar = ({ currentIndex, total, previous, next, syncController }: PresenterNavigationBarProps) => (
   <nav className="presenter-navigation" aria-label="Presenter note navigation">
     <DirectionLink note={previous}>← Previous</DirectionLink>
-    <span>{currentIndex + 1} / {total}</span>
+    <span>{currentIndex === null ? "Q&A" : `${currentIndex + 1} / ${total}`}</span>
     <DirectionLink note={next}>Next →</DirectionLink>
     <PresentationPairingPanel role="presenter" controller={syncController} />
   </nav>

web/apps/console/src/presentation/presenter/PresenterRoute.test.tsx

@@ -178,4 +178,21 @@ describe("PresenterRoute", () => {
     expect(screen.getByText(/Defense Q&A/i).closest("details")).toHaveAttribute("open");
     expect(screen.getByRole("link", { name: /Where is the AI agent in this thesis/i })).toHaveAttribute("aria-current", "page");
   });
+
+  it("keeps pairing and ended-session state available on Q&A routes", () => {
+    mockedUsePresentationSync.mockReturnValue({
+      ...idleController(),
+      state: { kind: "ended", reason: "presenter_ended" },
+    });
+    window.location.hash = "#discuss/where-is-ai-agent";
+
+    render(<PresenterRoute />);
+
+    expect(screen.getByRole("heading", { name: /Where is the AI agent/i })).toBeInTheDocument();
+    const navigation = screen.getByRole("navigation", { name: /presenter note navigation/i });
+    expect(navigation).toHaveTextContent("Q&A");
+    expect(navigation.querySelectorAll('[aria-disabled="true"]')).toHaveLength(2);
+    expect(screen.getByRole("button", { name: /pair presentation/i })).toBeInTheDocument();
+    expect(screen.getByText("The presenter ended this session.")).toBeInTheDocument();
+  });
 });

web/apps/console/src/presentation/presenter/PresenterRoute.tsx

@@ -65,9 +65,9 @@ export const PresenterRoute = () => {
         ? () => { moveFromCurrentHash("previous"); }
         : undefined}
     >
-      {navigation.note && (
+      {(navigation.note || discussion) && (
         <PresenterNavigationBar
-          currentIndex={navigation.index}
+          currentIndex={navigation.note ? navigation.index : null}
           total={presenterNotes.length}
           previous={navigation.previous}
           next={navigation.next}