fix: close presentation visual pass review findings

web/apps/console/src/presentation/chat/AssistantOperatorThread.test.tsx

@@ -217,6 +217,34 @@ describe("AssistantOperatorThread", () => {
     }
   });
 
+  it("can show the latest response in a static comparison transcript", async () => {
+    const setScrollTop = vi.fn();
+    const descriptors = {
+      scrollTop: Object.getOwnPropertyDescriptor(HTMLDivElement.prototype, "scrollTop"),
+      scrollHeight: Object.getOwnPropertyDescriptor(HTMLDivElement.prototype, "scrollHeight"),
+      clientHeight: Object.getOwnPropertyDescriptor(HTMLDivElement.prototype, "clientHeight"),
+    };
+
+    try {
+      Object.defineProperties(HTMLDivElement.prototype, {
+        scrollTop: { configurable: true, get: () => 0, set: setScrollTop },
+        scrollHeight: { configurable: true, get: () => 240 },
+        clientHeight: { configurable: true, get: () => 80 },
+      });
+      render(<AssistantOperatorThread mode="dock" messages={[]} scrollMode="end" />);
+
+      await waitFor(() => expect(setScrollTop).toHaveBeenCalledWith(160));
+    } finally {
+      for (const [name, descriptor] of Object.entries(descriptors)) {
+        if (descriptor) {
+          Object.defineProperty(HTMLDivElement.prototype, name, descriptor);
+        } else {
+          delete (HTMLDivElement.prototype as unknown as Record<string, unknown>)[name];
+        }
+      }
+    }
+  });
+
   it("pairs a lone tool call with its result", () => {
     const messages: ReadonlyArray<AgentMessage> = [
       {

web/apps/console/src/presentation/chat/AssistantOperatorThread.tsx

@@ -23,7 +23,7 @@ import {
 type AssistantOperatorThreadProps = {
   readonly mode: "hidden" | "full" | "rail" | "dock";
   readonly messages: ReadonlyArray<AgentMessage>;
-  readonly scrollMode?: "active" | "start" | undefined;
+  readonly scrollMode?: "active" | "start" | "end" | undefined;
   readonly submitApproval?: (() => void) | undefined;
   readonly requestRevision?: (() => void) | undefined;
   readonly ariaLabel?: string | undefined;
@@ -273,13 +273,22 @@ export const AssistantOperatorThread = ({
   }, [activeToolGroupId, toolGroupOverrides]);
 
   useEffect(() => {
+    const viewport = viewportRef.current;
+    if (!viewport) return;
+
+    // Static comparison transcripts should show their final answer; live
+    // presentation docks instead keep the beat-owned tool group in view.
+    if (!activeToolGroupId && scrollMode === "end") {
+      viewport.scrollTop = Math.max(0, viewport.scrollHeight - viewport.clientHeight);
+      return;
+    }
     if (!activeToolGroupId) return;
+
     // The same transcript can be much taller than the Scene 9 dock. Keep the
     // beat-owned group visible without maintaining a second scroll-state model.
-    const viewport = viewportRef.current;
     const activeGroup = viewport
       ?.querySelector<HTMLElement>(`[data-tool-group-id="${activeToolGroupId}"]`);
-    if (!viewport || !activeGroup) return;
+    if (!activeGroup) return;
     const bottomAlignedTop = activeGroup.offsetTop + activeGroup.offsetHeight - viewport.clientHeight;
     const dockCenteredTop = activeGroup.offsetTop - (viewport.clientHeight - activeGroup.offsetHeight) / 2;
     const requestedTop = scrollMode === "start"