fix(chat): preserve request selection during dismissal save

ui/src/components/TaskChatThread.test.tsx

@@ -3403,6 +3403,23 @@ describe.each([true, false])("Unanswered question history (conversationMode=%s)"
     expect(container.querySelector('[role="alert"]')?.textContent).toContain("Dismissal could not be saved");
   });
 
+  it("keeps the newly opened request visible when an earlier dismissal finishes saving", async () => {
+    const { genericPendingRequestConfirmationInteraction } = await import("@/fixtures/issueThreadInteractionFixtures");
+    const first = { ...genericPendingRequestConfirmationInteraction, id: "first-review", title: "First review" };
+    const second = { ...first, id: "second-review", title: "Second review" };
+    let finishDismiss!: () => void;
+    const onDismissInteraction = vi.fn(() => new Promise<void>(resolve => { finishDismiss = resolve; }));
+    render(<TaskChatThread {...props} comments={[]} interactions={[first, second]} onDismissInteraction={onDismissInteraction} />);
+    await act(async () => container.querySelector<HTMLButtonElement>('[aria-label="Open request: First review"]')!.click());
+    await dismiss();
+    expect(onDismissInteraction).toHaveBeenCalledWith(first);
+    await act(async () => container.querySelector<HTMLButtonElement>('[aria-label="Open request: Second review"]')!.click());
+    expect(takeover()?.textContent).toContain("Second review");
+    await act(async () => finishDismiss());
+    expect(takeover()?.textContent).toContain("Second review");
+    expect(takeover()?.textContent).not.toContain("First review");
+  });
+
   it("opens the new question but can reopen the exact historical native question", async () => {
     const nativeOld = { ...old, sourceRunId: "old-run", payload: { ...old.payload, runtimeRequestId: "old-request" } } as IssueThreadInteraction;
     render(<TaskChatThread {...props} comments={movedOn} interactions={[nativeOld, newer]} />);

ui/src/components/TaskChatThread.tsx

@@ -2591,6 +2591,10 @@ export function TaskChatThread(props: TaskChatThreadProps) {
     pendingComposerInputs.find((input) => input.key === selectedPendingKey) ??
     currentPendingInputs[0] ??
     null;
+  const selectedPendingInputKeyRef = useRef<string | null>(null);
+  useLayoutEffect(() => {
+    selectedPendingInputKeyRef.current = selectedPendingInput?.key ?? null;
+  }, [selectedPendingInput?.key]);
   const interactionDraftKey = selectedPendingInput
     ? `paperclip:task-input:${issueId ?? "unknown"}:${selectedPendingInput.key}`
     : undefined;
@@ -2870,9 +2874,11 @@ export function TaskChatThread(props: TaskChatThreadProps) {
                 } else {
                   dismissInput(selectedPendingInput.key);
                 }
-                explicitlyOpenedInputRef.current = null;
-                setSelectedPendingKey(null);
-                setTakeoverMode("normal");
+                if (selectedPendingInputKeyRef.current === selectedPendingInput.key) {
+                  explicitlyOpenedInputRef.current = null;
+                  setSelectedPendingKey(null);
+                  setTakeoverMode("normal");
+                }
               } catch (error) {
                 setDismissError(error instanceof Error ? error.message : "Unable to dismiss this request. Try again.");
               }