fix: turn discussion chips into presenter rail

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

@@ -291,6 +291,50 @@ describe("SceneBody", () => {
     expect(screen.getByText("Compile or save")).toBeInTheDocument();
   });
 
+  it("renders discussion branches as a labelled presenter rail", () => {
+    const location: PresentationLocation = { kind: "main", sceneId: "positioning", beatId: "landscape", focusPath: [] };
+    render(
+      <SceneBody
+        location={location}
+        demo={demo}
+        selectedNodeId={null}
+        selectNode={noop}
+        openEvidence={noop}
+        openDiscussion={noop}
+        onFocusPathChange={noop}
+        motionDisabled={false}
+      />,
+    );
+
+    const rail = screen.getByLabelText("defense discussion topics");
+    expect(rail).toHaveAttribute("data-discussion-rail", "true");
+    expect(within(rail).getByText("Defense questions")).toBeInTheDocument();
+    expect(within(rail).getByRole("list")).toBeInTheDocument();
+    expect(within(rail).getByRole("button", { name: /Hosted automation future-work/i })).toBeInTheDocument();
+  });
+
+  it("keeps discussion rail actions wired to branch ids", async () => {
+    const user = userEvent.setup();
+    const location: PresentationLocation = { kind: "main", sceneId: "positioning", beatId: "landscape", focusPath: [] };
+    const openDiscussion = vi.fn();
+    render(
+      <SceneBody
+        location={location}
+        demo={demo}
+        selectedNodeId={null}
+        selectNode={noop}
+        openEvidence={noop}
+        openDiscussion={openDiscussion}
+        onFocusPathChange={noop}
+        motionDisabled={false}
+      />,
+    );
+
+    await user.click(screen.getByRole("button", { name: /Hosted automation future-work/i }));
+
+    expect(openDiscussion).toHaveBeenCalledWith("hosted-automation");
+  });
+
   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

@@ -32,17 +32,21 @@ const DiscussionLinks = ({
   const branches = discussionBranches.filter((branch) => branch.parentSceneId === sceneId);
   if (branches.length === 0) return null;
   return (
-    <div className="scene-body__discussion-links" aria-label="discussion topics">
-      {branches.map((branch) => (
-        <button
-          key={branch.id}
-          type="button"
-          onClick={() => openDiscussion(branch.id)}
-        >
-          {branch.title}
-        </button>
-      ))}
-    </div>
+    <aside className="scene-body__discussion-links" aria-label="defense discussion topics" data-discussion-rail="true">
+      <span className="scene-body__discussion-label">Defense questions</span>
+      <ul className="scene-body__discussion-list">
+        {branches.map((branch) => (
+          <li key={branch.id}>
+            <button
+              type="button"
+              onClick={() => openDiscussion(branch.id)}
+            >
+              <span>{branch.title}</span> <small>{branch.claimClass}</small>
+            </button>
+          </li>
+        ))}
+      </ul>
+    </aside>
   );
 };
 

web/apps/console/src/presentation/presentation.css

@@ -118,28 +118,50 @@
 
 .scene-body__discussion-links {
   flex-shrink: 0;
+  display: grid;
+  grid-template-columns: auto minmax(0, 1fr);
+  align-items: center;
+  gap: 0.7rem;
+  margin-top: 0.55rem;
+  border-top: 1px solid color-mix(in oklch, var(--color-editorial-muted, oklch(0.48 0.025 65)) 30%, transparent);
+  padding-top: 0.45rem;
+}
+
+.scene-body__discussion-label {
+  color: color-mix(in oklch, var(--color-editorial-ink, oklch(0.19 0.015 65)) 72%, var(--color-editorial-muted, oklch(0.48 0.025 65)));
+  font: 650 0.72rem/1 var(--font-interface);
+}
+
+.scene-body__discussion-list {
   display: flex;
   flex-wrap: wrap;
   gap: 0.35rem;
-  margin-top: 0.45rem;
-  padding-bottom: 0.2rem;
+  margin: 0;
+  padding: 0;
+  list-style: none;
 }
 
 .scene-body__discussion-links button {
-  border: 1px solid oklch(0.82 0.04 82 / 0.22);
-  border-radius: 999px;
-  background: oklch(0.16 0.018 65 / 0.74);
-  color: oklch(0.9 0.025 82);
-  padding: 0.28rem 0.7rem;
-  font: 600 0.72rem/1 var(--font-interface);
-  letter-spacing: 0.04em;
-  text-transform: uppercase;
+  display: inline-flex;
+  align-items: center;
+  gap: 0.45rem;
+  border: 1px solid color-mix(in oklch, var(--color-editorial-muted, oklch(0.48 0.025 65)) 36%, transparent);
+  border-radius: 0.55rem;
+  background: color-mix(in oklch, var(--color-editorial-paper, oklch(0.975 0.012 82)) 72%, transparent);
+  color: var(--color-editorial-ink, oklch(0.19 0.015 65));
+  padding: 0.34rem 0.55rem;
+  font: 600 0.74rem/1 var(--font-interface);
+}
+
+.scene-body__discussion-links button small {
+  color: color-mix(in oklch, var(--color-editorial-ink, oklch(0.19 0.015 65)) 62%, var(--color-editorial-muted, oklch(0.48 0.025 65)));
+  font: 0.68rem/1 var(--font-interface);
 }
 
 .scene-body__discussion-links button:hover,
 .scene-body__discussion-links button:focus-visible {
-  border-color: var(--accent-cyan);
-  color: white;
+  border-color: var(--color-intent, oklch(0.53 0.17 250));
+  background: color-mix(in oklch, var(--color-intent, oklch(0.53 0.17 250)) 8%, var(--color-editorial-paper, oklch(0.975 0.012 82)));
 }
 
 .operator-chat {