test comment deletion cleanup regressions

ui/src/components/IssueChatThread.test.tsx

@@ -1,6 +1,7 @@
 // @vitest-environment jsdom
 
 import { act, createRef, forwardRef, useImperativeHandle, useState } from "react";
+import { flushSync } from "react-dom";
 import type { ReactNode } from "react";
 import { createRoot } from "react-dom/client";
 import { MemoryRouter } from "react-router-dom";
@@ -33,6 +34,14 @@ import type {
   IssueChatTranscriptEntry,
 } from "../lib/issue-chat-messages";
 
+function flushAct<T>(callback: () => T): T {
+  let result: T | undefined;
+  flushSync(() => {
+    result = callback();
+  });
+  return result as T;
+}
+
 function hasSmoothScrollBehavior(arg: unknown) {
   return typeof arg === "object"
     && arg !== null
@@ -1327,7 +1336,7 @@ describe("IssueChatThread", () => {
   it("renders deleted comments as tombstones without the original body", () => {
     const root = createRoot(container);
 
-    act(() => {
+    flushAct(() => {
       root.render(
         <MemoryRouter>
           <IssueChatThread
@@ -1360,12 +1369,12 @@ describe("IssueChatThread", () => {
       );
     });
 
-    expect(container.textContent).toContain("Comment deleted");
+    expect(container.textContent).toContain("You deleted this comment");
     expect(container.textContent).not.toContain("Sensitive deleted body");
     expect(container.querySelector("button[aria-label='Delete comment']")).toBeNull();
     expect(container.querySelector("button[aria-label='Copy message']")).toBeNull();
 
-    act(() => {
+    flushAct(() => {
       root.unmount();
     });
   });
@@ -1374,7 +1383,7 @@ describe("IssueChatThread", () => {
     const root = createRoot(container);
     const replaceStateSpy = vi.spyOn(window.history, "replaceState").mockImplementation(() => {});
 
-    act(() => {
+    flushAct(() => {
       root.render(
         <MemoryRouter initialEntries={["/issues/PAP-1#comment-comment-deleted"]}>
           <IssueChatThread
@@ -1409,7 +1418,7 @@ describe("IssueChatThread", () => {
     expect(replaceStateSpy).toHaveBeenCalledWith(null, "", "/issues/PAP-1");
 
     replaceStateSpy.mockRestore();
-    act(() => {
+    flushAct(() => {
       root.unmount();
     });
   });

ui/src/lib/issue-chat-messages.test.ts

@@ -324,6 +324,32 @@ describe("buildIssueChatMessages", () => {
     });
   });
 
+  it("redacts deleted comment bodies while preserving tombstone metadata", () => {
+    const messages = buildIssueChatMessages({
+      comments: [
+        createComment({
+          body: "Sensitive deleted body",
+          deletedAt: new Date("2026-04-06T12:05:00.000Z"),
+          deletedByType: "user",
+          deletedByUserId: "user-1",
+        }),
+      ],
+      timelineEvents: [],
+      linkedRuns: [],
+      liveRuns: [],
+      currentUserId: "user-1",
+      userLabelMap: new Map([["user-1", "Dotta"]]),
+    });
+
+    expect(messages[0]?.content).toEqual([{ type: "text", text: "" }]);
+    expect(messages[0]?.metadata.custom).toMatchObject({
+      deletedAt: "2026-04-06T12:05:00.000Z",
+      deletedByType: "user",
+      deletedByUserId: "user-1",
+    });
+    expect(JSON.stringify(messages[0])).not.toContain("Sensitive deleted body");
+  });
+
   it("prefers derived agent attribution when a board-authored comment is proven to come from a run", () => {
     const agentMap = new Map<string, Agent>([["agent-1", createAgent("agent-1", "Claude")]]);
     const messages = buildIssueChatMessages({