feat: integrate evaluation closing and questions

web/apps/console/src/presentation/PresentationRoute.test.tsx

@@ -114,6 +114,30 @@ describe("PresentationRoute", () => {
     expect(window.location.hash).toBe("#scene/positioning/landscape");
   });
 
+  it("returns to the questions beat after closing a discussion opened from the index", async () => {
+    const user = userEvent.setup();
+    window.location.hash = "#scene/conclusion/questions";
+    const { PresentationRoute } = await import("./PresentationRoute.js");
+    render(<PresentationRoute />);
+
+    await user.click(screen.getByRole("button", { name: /where is the ai agent/i }));
+    expect(window.location.hash).toBe("#discuss/where-is-ai-agent");
+
+    await user.click(screen.getByRole("button", { name: /return to thesis/i }));
+    expect(window.location.hash).toBe("#scene/conclusion/questions");
+  });
+
+  it("advances from the conclusion beat to the questions beat", async () => {
+    window.location.hash = "#scene/conclusion/conclusion";
+    const { PresentationRoute } = await import("./PresentationRoute.js");
+    render(<PresentationRoute />);
+
+    await userEvent.keyboard("{ArrowRight}");
+
+    expect(window.location.hash).toBe("#scene/conclusion/questions");
+    expect(await screen.findByRole("navigation", { name: /defense discussion index/i })).toBeInTheDocument();
+  });
+
   it("renders stable chat, primary, progress, and transient evidence surfaces", async () => {
     const { PresentationRoute } = await import("./PresentationRoute.js");
     render(<PresentationRoute />);

web/apps/console/src/presentation/SceneBody.test.tsx

@@ -39,6 +39,19 @@ const demo: DemoTimelineController = {
 
 afterEach(() => cleanup());
 
+const renderSceneBodyAtMainLocation = (sceneId: PresentationLocation["sceneId"], beatId: string, openDiscussion = noop) => render(
+  <SceneBody
+    location={{ kind: "main", sceneId, beatId, focusPath: [] }}
+    demo={demo}
+    selectedNodeId={null}
+    selectNode={noop}
+    openEvidence={noop}
+    openDiscussion={openDiscussion}
+    onFocusPathChange={noop}
+    motionDisabled={false}
+  />,
+);
+
 describe("SceneBody", () => {
   it("renders Scene 1 as an opening decomposition visual", () => {
     const location: PresentationLocation = { kind: "main", sceneId: "thesis", beatId: "substrate", focusPath: [] };
@@ -382,6 +395,31 @@ describe("SceneBody", () => {
     expect(openDiscussion).toHaveBeenCalledWith("hosted-automation");
   });
 
+  it("routes the evaluation scene through the dedicated evidence board", () => {
+    renderSceneBodyAtMainLocation("evaluation", "cohort");
+
+    expect(screen.getByRole("group", { name: /evaluation evidence board/i })).toBeInTheDocument();
+  });
+
+  it("routes conclusion beats through the dedicated conclusion scene", () => {
+    renderSceneBodyAtMainLocation("conclusion", "conclusion");
+
+    expect(screen.getByRole("region", { name: /thesis contribution boundary/i })).toBeInTheDocument();
+  });
+
+  it("renders the defense discussion index on the questions beat and opens its branches", async () => {
+    const user = userEvent.setup();
+    const openDiscussion = vi.fn();
+    renderSceneBodyAtMainLocation("conclusion", "questions", openDiscussion);
+
+    expect(screen.getByRole("navigation", { name: /defense discussion index/i })).toBeInTheDocument();
+    expect(screen.queryByLabelText("defense discussion topics")).not.toBeInTheDocument();
+
+    await user.click(screen.getByRole("button", { name: /where is the ai agent/i }));
+
+    expect(openDiscussion).toHaveBeenCalledWith("where-is-ai-agent");
+  });
+
   it("renders evidence before discussion links so the chip lane cannot cover evidence text", () => {
     const location: PresentationLocation = { kind: "main", sceneId: "positioning", beatId: "landscape", focusPath: [] };
     const { container } = render(

web/apps/console/src/presentation/SceneBody.tsx

@@ -11,6 +11,9 @@ import {
 import { DemoLifecycleScene } from "./DemoLifecycleScene.js";
 import { DemoWorkflowScene } from "./DemoWorkflowScene.js";
 import { StageCaption } from "./StageCaption.js";
+import { ConclusionScene } from "./conclusion/ConclusionScene.js";
+import { DefenseDiscussionIndex } from "./discussion/DefenseDiscussionIndex.js";
+import { EvaluationEvidenceScene } from "./evaluation/EvaluationEvidenceScene.js";
 import { ArchitectureScene } from "./scenes/ArchitectureScene.js";
 import { OpeningThesisScene } from "./opening/OpeningThesisScene.js";
 import { ProblemLoopScene } from "./opening/ProblemLoopScene.js";
@@ -257,32 +260,6 @@ const AuthoringScene = ({ scene, beat }: { scene: SceneDefinition; beat: SceneBe
   </>
 );
 
-const evaluationStats = [
-  { id: "cohort", value: "36", label: "trials" },
-  { id: "validity", value: "2", label: "challenges" },
-  { id: "findings", value: "3", label: "waves" },
-];
-
-const EvaluationScene = ({ scene, beat }: { scene: SceneDefinition; beat: SceneBeatDefinition }) => (
-  <>
-    <StageCaption eyebrow={`Act I · ${scene.claimClass}`} title={scene.title}>
-      <p>{beat.caption}</p>
-    </StageCaption>
-    <div className="scene-body__evaluation">
-      {evaluationStats.map((stat) => (
-        <div
-          key={stat.id}
-          className={`scene-body__evaluation-stat${beat.id === stat.id ? " scene-body__evaluation-stat--active" : ""}`}
-        >
-          <strong>{stat.value}</strong>
-          <span>{stat.label}</span>
-        </div>
-      ))}
-    </div>
-    <p className="scene-body__evidence">{scene.evidencePointer}</p>
-  </>
-);
-
 const AgentHandoffScene = ({ scene, beat }: { scene: SceneDefinition; beat: SceneBeatDefinition }) => (
   <>
     <StageCaption eyebrow="Agent handoff" title={scene.title}>
@@ -302,7 +279,10 @@ export const SceneBody = ({ location, demo, selectedNodeId, selectNode, openEvid
   const scene = findScene(sceneId) ?? findScene("thesis")!;
   const beat = findBeat(sceneId, beatId) ?? scene.beats[0]!;
 
-  const discussionLinks = <DiscussionLinks sceneId={scene.id} openDiscussion={openDiscussion} />;
+  // The questions beat renders its own grouped discussion index. Suppress the
+  // generic per-scene rail there so the same actions do not appear twice.
+  const showDiscussionRail = !(scene.id === "conclusion" && beat.id === "questions");
+  const discussionLinks = showDiscussionRail ? <DiscussionLinks sceneId={scene.id} openDiscussion={openDiscussion} /> : null;
   const content = (() => {
   switch (scene.view) {
     case "narrative":
@@ -345,9 +325,11 @@ export const SceneBody = ({ location, demo, selectedNodeId, selectNode, openEvid
         />
       );
     case "evaluation":
-      return <EvaluationScene scene={scene} beat={beat} />;
+      return <EvaluationEvidenceScene scene={scene} beat={beat} />;
     case "conclusion":
-      return <NarrativeScene scene={scene} beat={beat} />;
+      return beat.id === "questions"
+        ? <DefenseDiscussionIndex openDiscussion={openDiscussion} />
+        : <ConclusionScene scene={scene} beat={beat} />;
     default:
       return assertNever(scene.view);
   }

web/apps/console/src/presentation/presentation-state.test.ts

@@ -220,6 +220,20 @@ describe("presentationReducer", () => {
       .toEqual(deepRuntimeState.location);
   });
 
+  it("preserves the questions beat as the discussion return location", () => {
+    const atQuestions = presentationReducer(initialPresentationState, {
+      type: "jump",
+      location: { kind: "main", sceneId: "conclusion", beatId: "questions", focusPath: [] },
+    });
+    const opened = presentationReducer(atQuestions, {
+      type: "open_discussion",
+      branchId: "where-is-ai-agent",
+    });
+
+    expect(opened.discussionReturn).toEqual(atQuestions.location);
+    expect(presentationReducer(opened, { type: "close_discussion" }).location).toEqual(atQuestions.location);
+  });
+
   it("derives a receipt from beat metadata without opening an inspector", () => {
     const state = presentationReducer(initialPresentationState, {
       type: "jump",