test(frontend): harden live log contract

frontend/src/shell/CentralStatus.test.tsx

@@ -1,4 +1,4 @@
-import { act, fireEvent, render, screen } from "@testing-library/react";
+import { act, fireEvent, render, screen, within } from "@testing-library/react";
 import { beforeEach } from "vitest";
 import { useSessionStore } from "../store/sessionStore";
 import { CentralStatus } from "./CentralStatus";
@@ -32,6 +32,9 @@ test("renders only the chronological assistant transcript log while working", ()
   expect(log).toHaveTextContent("First line");
   expect(log).toHaveTextContent("Second line");
   expect(log).toHaveTextContent("Third line");
+  expect(
+    within(log).getAllByRole("listitem").map((row) => row.lastElementChild?.textContent),
+  ).toEqual(["First line", "Second line", "Third line"]);
   expect(log).toHaveClass("max-h-28", "overflow-y-auto");
   expect(screen.queryByText("how many patients?")).not.toBeInTheDocument();
   expect(screen.queryByText("Searching the schema…")).not.toBeInTheDocument();