import assert from "node:assert/strict";import test from "node:test"; import { settleFailedTurn } from "../src/features/agent/runtime/prompt-stream";import type { Session } from "../src/features/agent/runtime/types"; function session(patch: Partial<Session> = {}): Session {  return {    id: "s-1",    piSessionId: "pi-1",    title: "t",    messages: [],    status: "starting",    error: "",    input: "",    activeAssistantId: "assistant-1",    ...patch,  };} test("a failed turn idles the session when it still owns the bubble", () => {  const out = settleFailedTurn(    session({ activeAssistantId: "assistant-1" }),    "assistant-1",    "boom",  );  assert.equal(out.status, "idle");  assert.equal(out.activeAssistantId, undefined);  assert.equal(out.error, "boom");}); test("a failed turn does NOT clobber a newer turn that already superseded it", () => {  // The slow failed POST resolves AFTER the user sent a second prompt, which set  // a fresh activeAssistantId and starting status.  const superseded = session({ activeAssistantId: "assistant-2", status: "starting" });  const out = settleFailedTurn(superseded, "assistant-1", "boom");  assert.equal(out, superseded, "the newer turn's session object is returned untouched");  assert.equal(out.activeAssistantId, "assistant-2");  assert.equal(out.status, "starting");  assert.equal(out.error, "");}); test("a failed turn still settles when no turn currently owns the bubble", () => {  const out = settleFailedTurn(session({ activeAssistantId: undefined }), "assistant-1", "boom");  assert.equal(out.status, "idle");  assert.equal(out.error, "boom");});