PaperClipAI/ui/src/components/IssueChatThread.test.tsx

// @vitest-environment jsdom

import {
  act,
  createRef,
  forwardRef,
  StrictMode,
  useImperativeHandle,
  useState,
} from "react";
import { flushSync } from "react-dom";
import type { ComponentProps, ReactNode } from "react";
import { createRoot } from "react-dom/client";
import { MemoryRouter } from "react-router-dom";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import type { Agent } from "@paperclipai/shared";
import { CommentSubmissionUnknownError } from "../lib/comment-submit-result";
import { loadDraft, preserveDraftInTab, settleDraftSubmission } from "../lib/composer-draft";
import {
  IssueAssigneePausedNotice,
  IssueChatThread,
  VIRTUALIZED_THREAD_ROW_THRESHOLD,
  canStopIssueChatRun,
  findLatestCommentMessageIndex,
  getVirtualizedMeasurementScrollAdjustment,
  resolveAssistantMessageFoldedState,
  resolveIssueChatHumanAuthor,
} from "./IssueChatThread";
import type {
  AskUserQuestionsInteraction,
  RequestConfirmationInteraction,
  SuggestTasksInteraction,
} from "../lib/issue-thread-interactions";
import {
  issueChatLongThreadAgentMap,
  issueChatLongThreadComments,
  issueChatLongThreadEvents,
  issueChatLongThreadLinkedRuns,
  issueChatLongThreadTranscriptsByRunId,
} from "../fixtures/issueChatLongThreadFixture";
import { expiredSecretProposalInteraction } from "../fixtures/issueThreadInteractionFixtures";
import type {
  IssueChatLinkedRun,
  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 &&
    "behavior" in arg &&
    (arg as ScrollToOptions).behavior === "smooth"
  );
}

const { markdownBodyRenderMock, markdownEditorFocusMock } = vi.hoisted(() => ({
  markdownBodyRenderMock: vi.fn(),
  markdownEditorFocusMock: vi.fn(),
}));

const { appendMock } = vi.hoisted(() => ({
  appendMock: vi.fn(async () => undefined),
}));

const {
  captureComposerViewportSnapshotMock,
  restoreComposerViewportSnapshotMock,
  shouldPreserveComposerViewportMock,
} = vi.hoisted(() => ({
  captureComposerViewportSnapshotMock: vi.fn(),
  restoreComposerViewportSnapshotMock: vi.fn(),
  shouldPreserveComposerViewportMock: vi.fn(),
}));

vi.mock("@assistant-ui/react", () => ({
  AssistantRuntimeProvider: ({ children }: { children: ReactNode }) => (
    <div>{children}</div>
  ),
  useAui: () => ({ thread: () => ({ append: appendMock }) }),
}));

vi.mock("./transcript/useLiveRunTranscripts", () => ({
  useLiveRunTranscripts: () => ({
    transcriptByRun: new Map(),
    hasOutputForRun: () => false,
  }),
}));

vi.mock("../lib/issue-chat-scroll", async (importOriginal) => {
  const actual =
    await importOriginal<typeof import("../lib/issue-chat-scroll")>();
  return {
    ...actual,
    captureComposerViewportSnapshot:
      captureComposerViewportSnapshotMock.mockImplementation(
        actual.captureComposerViewportSnapshot,
      ),
    restoreComposerViewportSnapshot:
      restoreComposerViewportSnapshotMock.mockImplementation(
        actual.restoreComposerViewportSnapshot,
      ),
    shouldPreserveComposerViewport:
      shouldPreserveComposerViewportMock.mockImplementation(
        actual.shouldPreserveComposerViewport,
      ),
  };
});

vi.mock("./MarkdownBody", () => ({
  MarkdownBody: ({
    children,
    className,
  }: {
    children: ReactNode;
    className?: string;
  }) => {
    markdownBodyRenderMock({ children, className });
    return <div className={className}>{children}</div>;
  },
}));

vi.mock("./MarkdownEditor", () => ({
  MarkdownEditor: forwardRef(
    (
      {
        value = "",
        onChange,
        placeholder,
        className,
        contentClassName,
        fileDropTarget,
      }: {
        value?: string;
        onChange?: (value: string) => void;
        placeholder?: string;
        className?: string;
        contentClassName?: string;
        fileDropTarget?: "editor" | "parent";
      },
      ref,
    ) => {
      useImperativeHandle(ref, () => ({
        focus: markdownEditorFocusMock,
      }));

      return (
        <textarea
          aria-label="Issue chat editor"
          data-class-name={className}
          data-content-class-name={contentClassName}
          data-file-drop-target={fileDropTarget}
          placeholder={placeholder}
          value={value}
          onChange={(event) => onChange?.(event.target.value)}
        />
      );
    },
  ),
}));

vi.mock("./InlineEntitySelector", () => ({
  InlineEntitySelector: () => null,
}));

vi.mock("./Identity", () => ({
  Identity: ({ name }: { name: string }) => <span>{name}</span>,
}));

vi.mock("./OutputFeedbackButtons", () => ({
  OutputFeedbackButtons: () => null,
}));

vi.mock("@/components/ui/tooltip", () => ({
  Tooltip: ({ children }: { children: ReactNode }) => <>{children}</>,
  TooltipContent: ({ children }: { children: ReactNode }) => (
    <div>{children}</div>
  ),
  TooltipTrigger: ({ children }: { children: ReactNode }) => <>{children}</>,
}));

vi.mock("./AgentIconPicker", () => ({
  AgentIcon: () => null,
}));

vi.mock("./StatusBadge", () => ({
  StatusBadge: ({ status }: { status: string }) => <span>{status}</span>,
}));

vi.mock("./IssueLinkQuicklook", () => ({
  IssueLinkQuicklook: ({
    children,
    to,
    issuePathId,
    className,
  }: {
    children: ReactNode;
    to: string;
    issuePathId: string;
    className?: string;
  }) => (
    <a href={to} data-issue-path-id={issuePathId} className={className}>
      {children}
    </a>
  ),
}));

vi.mock("../hooks/usePaperclipIssueRuntime", () => ({
  usePaperclipIssueRuntime: () => ({}),
}));

// eslint-disable-next-line @typescript-eslint/no-explicit-any
(globalThis as any).IS_REACT_ACT_ENVIRONMENT = true;

function createSuggestedTasksInteraction(
  overrides: Partial<SuggestTasksInteraction> = {},
): SuggestTasksInteraction {
  return {
    id: "interaction-suggest-1",
    companyId: "company-1",
    issueId: "issue-1",
    kind: "suggest_tasks",
    title: "Suggested follow-up work",
    summary: "Preview the next issue tree before accepting it.",
    status: "pending",
    continuationPolicy: "wake_assignee",
    createdByAgentId: "agent-1",
    createdByUserId: null,
    resolvedByAgentId: null,
    resolvedByUserId: null,
    createdAt: new Date("2026-04-06T12:02:00.000Z"),
    updatedAt: new Date("2026-04-06T12:02:00.000Z"),
    resolvedAt: null,
    payload: {
      version: 1,
      tasks: [
        {
          clientKey: "task-1",
          title: "Prototype the card",
        },
      ],
    },
    result: null,
    ...overrides,
    resolverPolicy: overrides.resolverPolicy ?? "anyone",
    requestedResolverPolicy: overrides.requestedResolverPolicy ?? "anyone",
    effectiveResolverPolicy: overrides.effectiveResolverPolicy ?? "anyone",
    resolverPolicyProvenance: overrides.resolverPolicyProvenance ?? "inherited",
    effectiveResolverPolicySource:
      overrides.effectiveResolverPolicySource ?? "requested",
    legacyResolverPolicyAliases: overrides.legacyResolverPolicyAliases ?? {
      requested: "board_or_agents",
      effective: "board_or_agents",
    },
  };
}

function createQuestionInteraction(
  overrides: Partial<AskUserQuestionsInteraction> = {},
): AskUserQuestionsInteraction {
  return {
    id: "interaction-question-1",
    companyId: "company-1",
    issueId: "issue-1",
    kind: "ask_user_questions",
    title: "Clarify the phase",
    status: "pending",
    continuationPolicy: "wake_assignee",
    createdByAgentId: "agent-1",
    createdByUserId: null,
    resolvedByAgentId: null,
    resolvedByUserId: null,
    createdAt: new Date("2026-04-06T12:03:00.000Z"),
    updatedAt: new Date("2026-04-06T12:03:00.000Z"),
    resolvedAt: null,
    payload: {
      version: 1,
      submitLabel: "Submit answers",
      questions: [
        {
          id: "scope",
          prompt: "Pick one scope",
          selectionMode: "single",
          required: true,
          options: [
            { id: "phase-1", label: "Phase 1" },
            { id: "phase-2", label: "Phase 2" },
          ],
        },
      ],
    },
    result: null,
    ...overrides,
    resolverPolicy: overrides.resolverPolicy ?? "anyone",
    requestedResolverPolicy: overrides.requestedResolverPolicy ?? "anyone",
    effectiveResolverPolicy: overrides.effectiveResolverPolicy ?? "anyone",
    resolverPolicyProvenance: overrides.resolverPolicyProvenance ?? "inherited",
    effectiveResolverPolicySource:
      overrides.effectiveResolverPolicySource ?? "requested",
    legacyResolverPolicyAliases: overrides.legacyResolverPolicyAliases ?? {
      requested: "board_or_agents",
      effective: "board_or_agents",
    },
  };
}

function createExpiredRequestConfirmationInteraction(
  overrides: Partial<RequestConfirmationInteraction> = {},
): RequestConfirmationInteraction {
  return {
    id: "interaction-confirmation-expired",
    companyId: "company-1",
    issueId: "issue-1",
    kind: "request_confirmation",
    title: "Approve the plan",
    status: "expired",
    continuationPolicy: "wake_assignee_on_accept",
    createdByAgentId: "agent-1",
    createdByUserId: null,
    resolvedByAgentId: null,
    resolvedByUserId: "user-1",
    createdAt: new Date("2026-04-06T12:04:00.000Z"),
    updatedAt: new Date("2026-04-06T12:05:00.000Z"),
    resolvedAt: new Date("2026-04-06T12:05:00.000Z"),
    payload: {
      version: 1,
      prompt: "Approve the plan and let the responsible start implementation?",
      acceptLabel: "Approve plan",
      rejectLabel: "Request revisions",
    },
    result: {
      version: 1,
      outcome: "superseded_by_comment",
      commentId: "comment-1",
    },
    ...overrides,
    resolverPolicy: overrides.resolverPolicy ?? "anyone",
    requestedResolverPolicy: overrides.requestedResolverPolicy ?? "anyone",
    effectiveResolverPolicy: overrides.effectiveResolverPolicy ?? "anyone",
    resolverPolicyProvenance: overrides.resolverPolicyProvenance ?? "inherited",
    effectiveResolverPolicySource:
      overrides.effectiveResolverPolicySource ?? "requested",
    legacyResolverPolicyAliases: overrides.legacyResolverPolicyAliases ?? {
      requested: "board_or_agents",
      effective: "board_or_agents",
    },
  };
}

function createFileDragEvent(type: string, files: File[]) {
  const event = new Event(type, {
    bubbles: true,
    cancelable: true,
  }) as Event & {
    dataTransfer: {
      types: string[];
      files: File[];
      dropEffect?: string;
    };
  };
  event.dataTransfer = {
    types: ["Files"],
    files,
  };
  return event;
}

describe("IssueChatThread", () => {
  let container: HTMLDivElement;

  function renderIssueThread(root: ReturnType<typeof createRoot>, props: Partial<ComponentProps<typeof IssueChatThread>> = {}) {
    root.render(
      <MemoryRouter>
        <IssueChatThread
          comments={[]}
          linkedRuns={[]}
          timelineEvents={[]}
          liveRuns={[]}
          onAdd={async () => {}}
          enableLiveTranscriptPolling={false}
          {...props}
        />
      </MemoryRouter>,
    );
  }

  beforeEach(() => {
    container = document.createElement("div");
    document.body.appendChild(container);
    window.scrollTo = vi.fn();
    localStorage.clear();
    sessionStorage.clear();
  });

  afterEach(() => {
    container.remove();
    vi.useRealTimers();
    appendMock.mockReset();
    markdownEditorFocusMock.mockReset();
    captureComposerViewportSnapshotMock.mockClear();
    restoreComposerViewportSnapshotMock.mockClear();
    shouldPreserveComposerViewportMock.mockClear();
    markdownBodyRenderMock.mockClear();
  });

  it("drops the count heading and does not use an internal scrollbox", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Jump to latest");
    expect(container.textContent).not.toContain("Chat (");

    const viewport = container.querySelector(
      '[data-testid="thread-viewport"]',
    ) as HTMLDivElement | null;
    expect(viewport).not.toBeNull();
    expect(viewport?.className).not.toContain("overflow-y-auto");
    expect(viewport?.className).not.toContain("max-h-(--sz-70vh)");

    act(() => {
      root.unmount();
    });
  });

  it("labels incoming iMessage bubbles without labeling board replies", () => {
    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: ["imessage", "board"].map((source) => ({
          id: `comment-${source}`,
          companyId: "company-1",
          issueId: "issue-1",
          authorAgentId: null,
          authorUserId: "user-board",
          authorType: "user" as const,
          body: `Reply from ${source}`,
          presentation: null,
          metadata: source === "imessage" ? {
            version: 1 as const,
            sourceChannel: "imessage-photon" as const,
            sections: [{ title: "iMessage Photon sender", rows: [{ type: "text" as const, text: "Linked person" }] }],
          } : null,
          createdAt: new Date("2026-09-12T12:00:00Z"),
          updatedAt: new Date("2026-09-12T12:00:00Z"),
        })),
        currentUserId: "user-board",
        showComposer: false,
      });
    });
    expect(container.querySelector("#comment-comment-imessage")?.textContent).toContain("Sent from iMessage");
    expect(container.querySelector("#comment-comment-board")?.textContent).not.toContain("Sent from iMessage");
    act(() => root.unmount());
  });

  it("uses accent-safe markdown color in the current user's blue message bubble", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-current-user",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-board",
            authorType: "user",
            body: "1. **Readable** markdown on blue",
            presentation: null,
            metadata: null,
            createdAt: new Date("2026-04-06T12:00:00.000Z"),
            updatedAt: new Date("2026-04-06T12:00:00.000Z"),
          },
        ],
        currentUserId: "user-board",
        showComposer: false,
      });
    });

    expect(markdownBodyRenderMock).toHaveBeenCalledWith(
      expect.objectContaining({
        children: "1. **Readable** markdown on blue",
        className: expect.stringContaining("paperclip-markdown-on-accent"),
      }),
    );

    act(() => {
      root.unmount();
    });
  });

  it("labels operator-interrupted cancelled runs as interrupted while preserving plain cancelled runs", () => {
    const root = createRoot(container);
    const linkedRuns: IssueChatLinkedRun[] = [
      {
        runId: "run-interrupted",
        status: "cancelled",
        agentId: "agent-1",
        agentName: "CodexCoder",
        createdAt: new Date("2026-04-06T12:00:00.000Z"),
        startedAt: new Date("2026-04-06T12:00:00.000Z"),
        finishedAt: new Date("2026-04-06T12:01:00.000Z"),
        errorCode: "operator_interrupted",
        resultJson: {
          operatorInterrupted: true,
          interruptionSource: "issue_comment_interrupt",
        },
      },
      {
        runId: "run-cancelled",
        status: "cancelled",
        agentId: "agent-1",
        agentName: "CodexCoder",
        createdAt: new Date("2026-04-06T12:02:00.000Z"),
        startedAt: new Date("2026-04-06T12:02:00.000Z"),
        finishedAt: new Date("2026-04-06T12:03:00.000Z"),
        resultJson: { stopReason: "cancelled" },
      },
    ];

    act(() => {
      renderIssueThread(root, {
        linkedRuns: linkedRuns,
        showComposer: false,
      });
    });

    expect(container.textContent).toContain(
      "interrupted by board after 1 minute",
    );
    expect(container.textContent).toContain("cancelled after 1 minute");
    expect(container.textContent).not.toContain("run interrupted");

    act(() => {
      root.unmount();
    });
  });

  it("falls back to execCommand for comment copy actions in insecure contexts", async () => {
    const clipboardWrite = vi.fn(async () => {
      throw new Error("Clipboard API blocked");
    });
    const execCommand = vi.fn(() => true);
    const originalClipboard = Object.getOwnPropertyDescriptor(
      navigator,
      "clipboard",
    );
    const originalExecCommand = Object.getOwnPropertyDescriptor(
      document,
      "execCommand",
    );
    const originalSecureContext = Object.getOwnPropertyDescriptor(
      window,
      "isSecureContext",
    );
    Object.defineProperty(window, "isSecureContext", {
      configurable: true,
      value: false,
    });
    Object.defineProperty(navigator, "clipboard", {
      configurable: true,
      value: { writeText: clipboardWrite },
    });
    Object.defineProperty(document, "execCommand", {
      configurable: true,
      value: execCommand,
    });

    try {
      const root = createRoot(container);

      act(() => {
        renderIssueThread(root, {
          comments: [
            {
              id: "comment-copy",
              companyId: "company-1",
              issueId: "issue-1",
              authorAgentId: null,
              authorUserId: "user-1",
              authorType: "user",
              body: "Copy this comment",
              presentation: null,
              metadata: null,
              createdAt: new Date("2026-04-06T12:00:00.000Z"),
              updatedAt: new Date("2026-04-06T12:00:00.000Z"),
            },
          ],
          showComposer: false,
        });
      });

      const copyButton = container.querySelector(
        'button[aria-label="Copy message"]',
      ) as HTMLButtonElement | null;
      expect(copyButton).not.toBeNull();

      await act(async () => {
        copyButton?.click();
        await Promise.resolve();
      });

      expect(clipboardWrite).not.toHaveBeenCalled();
      expect(execCommand).toHaveBeenCalledWith("copy");

      act(() => {
        root.unmount();
      });
    } finally {
      if (originalClipboard) {
        Object.defineProperty(navigator, "clipboard", originalClipboard);
      } else {
        // @ts-expect-error test cleanup for optional browser API
        delete navigator.clipboard;
      }
      if (originalExecCommand) {
        Object.defineProperty(document, "execCommand", originalExecCommand);
      } else {
        // @ts-expect-error test cleanup for optional browser API
        delete document.execCommand;
      }
      if (originalSecureContext) {
        Object.defineProperty(window, "isSecureContext", originalSecureContext);
      } else {
        // @ts-expect-error test cleanup for optional browser API
        delete window.isSecureContext;
      }
    }
  });

  it("renders footer content inside the thread viewport before the bottom anchor", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        showComposer: false,
        footer: <div>Sibling footer</div>,
      });
    });

    const viewport = container.querySelector('[data-testid="thread-viewport"]');
    const footer = container.querySelector(
      '[data-testid="issue-chat-thread-footer"]',
    );
    expect(viewport).not.toBeNull();
    expect(footer).not.toBeNull();
    expect(footer?.textContent).toBe("Sibling footer");
    expect(footer?.parentElement).toBe(viewport);
    expect(footer?.nextElementSibling?.textContent).toBe("");

    act(() => {
      root.unmount();
    });
  });

  it("renders the composer in planning mode when the issue is in planning mode", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        issueWorkMode: "planning",
        onWorkModeChange: () => {},
      });
    });

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    );
    expect(composer).not.toBeNull();
    expect(composer?.getAttribute("data-pending-work-mode")).toBe("planning");
    expect(composer?.className).toContain("amber");

    const chip = container.querySelector(
      '[data-testid="issue-chat-composer-work-mode-chip"]',
    );
    expect(chip).not.toBeNull();
    expect(chip?.getAttribute("data-pending-work-mode")).toBe("planning");
    expect(chip?.textContent).toContain("Plan mode");

    act(() => {
      root.unmount();
    });
  });

  it("selects planning from the add menu and removes its chip", () => {
    const root = createRoot(container);
    const onWorkModeChange = vi.fn();

    act(() => {
      renderIssueThread(root, {
        issueWorkMode: "standard",
        onWorkModeChange: onWorkModeChange,
      });
    });

    expect(container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]')).toBeNull();
    const add = container.querySelector('[data-testid="issue-chat-composer-add"]') as HTMLButtonElement;
    expect(add).not.toBeNull();

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    );
    expect(composer?.getAttribute("data-pending-work-mode")).toBe("standard");
    expect(composer?.className).not.toContain("amber");

    act(() => {
      add.dispatchEvent(new PointerEvent("pointerdown", { bubbles: true, button: 0 }));
    });

    const menuItem = document.querySelector(
      '[data-testid="composer-add-plan"]',
    ) as HTMLButtonElement | null;
    expect(menuItem).not.toBeNull();
    expect(menuItem?.textContent).toContain("Plan mode");

    act(() => {
      menuItem?.click();
    });

    // Local pending switch only — does not mutate the issue until submit.
    expect(onWorkModeChange).not.toHaveBeenCalled();
    expect(composer?.getAttribute("data-pending-work-mode")).toBe("planning");
    expect(composer?.className).toContain("amber");
    const chip = container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]') as HTMLButtonElement;
    expect(chip?.textContent).toContain("Plan mode");
    act(() => chip.click());
    expect(composer?.getAttribute("data-pending-work-mode")).toBe("standard");
    expect(container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]')).toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("selects ask mode from the composer menu and cycles work modes with cmd-period", () => {
    const root = createRoot(container);
    const onWorkModeChange = vi.fn();

    act(() => {
      renderIssueThread(root, {
        issueWorkMode: "standard",
        onWorkModeChange: onWorkModeChange,
      });
    });

    const add = container.querySelector('[data-testid="issue-chat-composer-add"]') as HTMLButtonElement;
    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    expect(add).not.toBeNull();
    expect(composer).not.toBeNull();

    act(() => {
      add.dispatchEvent(new PointerEvent("pointerdown", { bubbles: true, button: 0 }));
    });

    const askMenuItem = document.querySelector(
      '[data-testid="composer-add-ask"]',
    ) as HTMLButtonElement | null;
    expect(askMenuItem).not.toBeNull();
    expect(askMenuItem?.textContent).toContain("Ask mode");

    act(() => {
      askMenuItem?.click();
    });

    expect(onWorkModeChange).not.toHaveBeenCalled();
    expect(composer?.getAttribute("data-pending-work-mode")).toBe("ask");
    expect(composer?.className).toContain("sky");
    expect(container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]')?.textContent).toContain("Ask mode");

    act(() => {
      composer?.dispatchEvent(
        new KeyboardEvent("keydown", {
          bubbles: true,
          code: "Period",
          key: ".",
          metaKey: true,
        }),
      );
    });

    expect(composer?.getAttribute("data-pending-work-mode")).toBe("standard");
    expect(container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]')).toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("cycles work modes and prevents default when iOS leaves the keydown code empty", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        issueWorkMode: "standard",
      });
    });

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    expect(composer).not.toBeNull();
    expect(composer?.getAttribute("data-pending-work-mode")).toBe("standard");

    // iOS Safari with a hardware keyboard frequently reports an empty `code` for
    // cmd-period. Without a `key` fallback the handler returns early, never calls
    // preventDefault, and Safari's default cancel/dismiss closes the view.
    const evt = new KeyboardEvent("keydown", {
      bubbles: true,
      cancelable: true,
      code: "",
      key: ".",
      metaKey: true,
    });
    act(() => {
      composer?.dispatchEvent(evt);
    });

    expect(evt.defaultPrevented).toBe(true);
    expect(composer?.getAttribute("data-pending-work-mode")).not.toBe(
      "standard",
    );

    act(() => {
      root.unmount();
    });
  });

  it("virtualizes long merged threads so only a windowed slice mounts", () => {
    const root = createRoot(container);
    const totalMergedRows =
      issueChatLongThreadComments.length +
      issueChatLongThreadEvents.length +
      issueChatLongThreadLinkedRuns.length;
    expect(totalMergedRows).toBeGreaterThanOrEqual(
      VIRTUALIZED_THREAD_ROW_THRESHOLD,
    );

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        showComposer: false,
        showJumpToLatest: false,
        autoScrollToHashOnInitialLoad: true,
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    const virtualizer = container.querySelector(
      '[data-testid="issue-chat-thread-virtualizer"]',
    ) as HTMLDivElement | null;
    expect(virtualizer).not.toBeNull();
    expect(virtualizer?.dataset.virtualCount).toBe(String(totalMergedRows));

    const rows = container.querySelectorAll(
      '[data-testid="issue-chat-message-row"]',
    );
    expect(rows.length).toBeGreaterThan(0);
    expect(rows.length).toBeLessThan(totalMergedRows);

    const virtualRows = container.querySelectorAll(
      '[data-testid="issue-chat-thread-virtual-row"]',
    );
    expect(virtualRows.length).toBe(rows.length);
    for (const row of Array.from(virtualRows)) {
      const transform = (row as HTMLDivElement).style.transform;
      expect(transform).toMatch(/translateY\(/);
    }

    act(() => {
      root.unmount();
    });
  });

  it("measures tall virtual rows before positioning following rows", async () => {
    const root = createRoot(container);
    const requestAnimationFrameMock = vi
      .spyOn(window, "requestAnimationFrame")
      .mockImplementation((callback) => {
        callback(0);
        return 0;
      });

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        showComposer: false,
        showJumpToLatest: false,
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    const virtualRows = container.querySelectorAll<HTMLDivElement>(
      '[data-testid="issue-chat-thread-virtual-row"]',
    );
    expect(virtualRows.length).toBeGreaterThan(1);

    Object.defineProperty(virtualRows[0], "getBoundingClientRect", {
      configurable: true,
      value: () => ({
        x: 0,
        y: 0,
        width: 700,
        height: 800,
        top: 0,
        right: 700,
        bottom: 800,
        left: 0,
        toJSON: () => ({}),
      }),
    });

    await act(async () => {
      virtualRows[0].dispatchEvent(new MouseEvent("click", { bubbles: true }));
      await Promise.resolve();
    });

    const nextTransform = virtualRows[1].style.transform;
    const translateY = Number(
      nextTransform.match(/translateY\(([-\d.]+)px\)/)?.[1] ?? "0",
    );
    expect(translateY).toBeGreaterThanOrEqual(800);

    act(() => {
      root.unmount();
    });
    requestAnimationFrameMock.mockRestore();
  });

  it("scrolls loaded hash targets through the virtualized message index when initial hash scrolling is enabled", () => {
    const root = createRoot(container);
    const targetComment = issueChatLongThreadComments.at(-1);
    expect(targetComment).toBeDefined();
    const scrollToMock = vi
      .spyOn(window, "scrollTo")
      .mockImplementation(() => {});

    act(() => {
      root.render(
        <MemoryRouter
          initialEntries={[`/issues/PAP-1#comment-${targetComment!.id}`]}
        >
          <IssueChatThread
            comments={issueChatLongThreadComments}
            linkedRuns={issueChatLongThreadLinkedRuns}
            timelineEvents={issueChatLongThreadEvents}
            liveRuns={[]}
            agentMap={issueChatLongThreadAgentMap}
            currentUserId="user-board"
            onAdd={async () => {}}
            showComposer={false}
            showJumpToLatest={false}
            autoScrollToHashOnInitialLoad
            enableLiveTranscriptPolling={false}
            transcriptsByRunId={issueChatLongThreadTranscriptsByRunId}
            hasOutputForRun={(runId) =>
              issueChatLongThreadTranscriptsByRunId.has(runId)
            }
          />
        </MemoryRouter>,
      );
    });

    expect(
      scrollToMock.mock.calls.some(([arg]) => hasSmoothScrollBehavior(arg)),
    ).toBe(true);

    scrollToMock.mockRestore();
    act(() => {
      root.unmount();
    });
  });

  it("uses the virtualizer when jumping to the latest long-thread row", () => {
    const root = createRoot(container);
    const scrollToMock = vi
      .spyOn(window, "scrollTo")
      .mockImplementation(() => {});

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    act(() => {
      jump?.click();
    });

    expect(
      scrollToMock.mock.calls.some(([arg]) => hasSmoothScrollBehavior(arg)),
    ).toBe(true);

    scrollToMock.mockRestore();
    act(() => {
      root.unmount();
    });
  });

  // Regression for PAP-2660: on the real issue page the chat thread is wrapped
  // in `<main id="main-content" overflow-auto>`, so the virtualizer must bind
  // to that ancestor's scroll instead of `window` (which never moves on
  // desktop). When mounted inside an overflow-auto ancestor the jump-to-latest
  // action must drive that element's scrollTo, not window.scrollTo.
  it("targets an overflow-auto ancestor instead of window scroll on jump-to-latest", () => {
    container.remove();
    const scrollHost = document.createElement("main");
    scrollHost.id = "main-content";
    scrollHost.style.overflowY = "auto";
    scrollHost.style.overflow = "auto";
    scrollHost.style.height = "640px";
    document.body.appendChild(scrollHost);
    container = document.createElement("div");
    scrollHost.appendChild(container);

    const root = createRoot(container);
    const windowScrollToMock = vi
      .spyOn(window, "scrollTo")
      .mockImplementation(() => {});
    const elementScrollToMock = vi.fn();
    scrollHost.scrollTo =
      elementScrollToMock as unknown as typeof scrollHost.scrollTo;

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    windowScrollToMock.mockClear();
    elementScrollToMock.mockClear();

    act(() => {
      jump?.click();
    });

    expect(
      elementScrollToMock.mock.calls.some(([arg]) =>
        hasSmoothScrollBehavior(arg),
      ),
    ).toBe(true);
    expect(
      windowScrollToMock.mock.calls.some(([arg]) =>
        hasSmoothScrollBehavior(arg),
      ),
    ).toBe(false);

    windowScrollToMock.mockRestore();
    act(() => {
      root.unmount();
    });
    scrollHost.remove();
  });

  it("cancels jump-to-latest settling when the user scrolls manually", () => {
    vi.useFakeTimers();
    container.remove();
    const scrollHost = document.createElement("main");
    scrollHost.id = "main-content";
    scrollHost.style.overflowY = "auto";
    scrollHost.style.overflow = "auto";
    scrollHost.style.height = "640px";
    document.body.appendChild(scrollHost);
    container = document.createElement("div");
    scrollHost.appendChild(container);

    const elementScrollToMock = vi.fn();
    scrollHost.scrollTo =
      elementScrollToMock as unknown as typeof scrollHost.scrollTo;
    const originalScrollIntoView = Element.prototype.scrollIntoView;
    const scrollIntoViewMock = vi.fn();
    Element.prototype.scrollIntoView =
      scrollIntoViewMock as unknown as typeof Element.prototype.scrollIntoView;

    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    // Flush pending mount timers so this test measures only the explicit
    // jump-to-latest interaction.
    act(() => {
      vi.advanceTimersByTime(500);
    });
    elementScrollToMock.mockClear();
    scrollIntoViewMock.mockClear();

    act(() => {
      jump?.click();
    });

    expect(
      elementScrollToMock.mock.calls.some(([arg]) =>
        hasSmoothScrollBehavior(arg),
      ),
    ).toBe(true);
    const scrollCallsAfterClick = elementScrollToMock.mock.calls.length;

    act(() => {
      scrollHost.dispatchEvent(new WheelEvent("wheel", { bubbles: true }));
      vi.advanceTimersByTime(500);
    });

    expect(elementScrollToMock).toHaveBeenCalledTimes(scrollCallsAfterClick);
    expect(scrollIntoViewMock).not.toHaveBeenCalled();

    Element.prototype.scrollIntoView = originalScrollIntoView;
    act(() => {
      root.unmount();
    });
    scrollHost.remove();
  });

  // PAP-12003: initial page load must not jump to the latest comment. If a
  // user wants the newest message, the explicit Jump to latest control owns it.
  it("does not auto-scroll to the latest comment on initial load", () => {
    vi.useFakeTimers();
    container.remove();
    const scrollHost = document.createElement("main");
    scrollHost.id = "main-content";
    scrollHost.style.overflowY = "auto";
    scrollHost.style.overflow = "auto";
    scrollHost.style.height = "640px";
    document.body.appendChild(scrollHost);
    container = document.createElement("div");
    scrollHost.appendChild(container);

    const elementScrollToMock = vi.fn();
    scrollHost.scrollTo =
      elementScrollToMock as unknown as typeof scrollHost.scrollTo;
    const originalScrollIntoView = Element.prototype.scrollIntoView;
    const scrollIntoViewMock = vi.fn();
    Element.prototype.scrollIntoView =
      scrollIntoViewMock as unknown as typeof Element.prototype.scrollIntoView;

    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    // No jump click: initial render should preserve the page position.
    act(() => {
      vi.advanceTimersByTime(500);
    });

    expect(elementScrollToMock).not.toHaveBeenCalled();
    expect(scrollIntoViewMock).not.toHaveBeenCalled();

    Element.prototype.scrollIntoView = originalScrollIntoView;
    act(() => {
      root.unmount();
    });
    scrollHost.remove();
    vi.useRealTimers();
  });

  it("can keep the page at the top on initial load while preserving manual jump-to-latest", () => {
    vi.useFakeTimers();
    container.remove();
    const scrollHost = document.createElement("main");
    scrollHost.id = "main-content";
    scrollHost.style.overflowY = "auto";
    scrollHost.style.overflow = "auto";
    scrollHost.style.height = "640px";
    document.body.appendChild(scrollHost);
    container = document.createElement("div");
    scrollHost.appendChild(container);

    const elementScrollToMock = vi.fn();
    scrollHost.scrollTo =
      elementScrollToMock as unknown as typeof scrollHost.scrollTo;
    const originalScrollIntoView = Element.prototype.scrollIntoView;
    const scrollIntoViewMock = vi.fn();
    Element.prototype.scrollIntoView =
      scrollIntoViewMock as unknown as typeof Element.prototype.scrollIntoView;

    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    act(() => {
      vi.advanceTimersByTime(500);
    });

    expect(elementScrollToMock).not.toHaveBeenCalled();
    expect(scrollIntoViewMock).not.toHaveBeenCalled();

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    act(() => {
      jump?.click();
    });

    const scrolledToLatest =
      elementScrollToMock.mock.calls.some(([arg]) =>
        hasSmoothScrollBehavior(arg),
      ) || scrollIntoViewMock.mock.calls.length > 0;
    expect(scrolledToLatest).toBe(true);

    Element.prototype.scrollIntoView = originalScrollIntoView;
    act(() => {
      root.unmount();
    });
    scrollHost.remove();
    vi.useRealTimers();
  });

  it("can keep the page at the top on initial load even when the URL has a comment hash", () => {
    vi.useFakeTimers();
    const originalScrollIntoView = Element.prototype.scrollIntoView;
    const scrollIntoViewMock = vi.fn();
    Object.defineProperty(Element.prototype, "scrollIntoView", {
      configurable: true,
      value: scrollIntoViewMock,
    });

    const root = createRoot(container);
    act(() => {
      root.render(
        <MemoryRouter
          initialEntries={["/PAP/issues/PAP-12003#comment-comment-target"]}
        >
          <IssueChatThread
            comments={[
              {
                id: "comment-target",
                companyId: "company-1",
                issueId: "issue-1",
                authorAgentId: "agent-1",
                authorUserId: null,
                authorType: "agent",
                body: "Previous done comment near the bottom.",
                presentation: null,
                metadata: null,
                createdAt: new Date("2026-07-07T21:13:07.902Z"),
                updatedAt: new Date("2026-07-07T21:13:07.902Z"),
              },
            ]}
            linkedRuns={[]}
            timelineEvents={[]}
            liveRuns={[]}
            onAdd={async () => {}}
            showComposer={false}
            enableLiveTranscriptPolling={false}
          />
        </MemoryRouter>,
      );
    });

    act(() => {
      vi.advanceTimersByTime(500);
    });

    expect(scrollIntoViewMock).not.toHaveBeenCalled();

    Object.defineProperty(Element.prototype, "scrollIntoView", {
      configurable: true,
      value: originalScrollIntoView,
    });
    act(() => {
      root.unmount();
    });
    vi.useRealTimers();
  });

  // Regression for PAP-2672: when the merged feed ends with a non-comment row
  // (run/timeline/embedded output) we still want Jump to latest to land on the
  // last comment, not whichever activity row sorts last.
  it("targets the latest comment row when trailing rows are non-comments (PAP-2672)", () => {
    const lastComment = issueChatLongThreadComments.at(-1);
    expect(lastComment).toBeDefined();
    const trailingRunStart = new Date(
      new Date(lastComment!.createdAt).getTime() + 60_000,
    );
    const trailingRun: IssueChatLinkedRun = {
      runId: "trailing-run-pap-2672",
      status: "failed",
      agentId: "agent-perf-codex",
      agentName: "TrailingRunner",
      adapterType: "codex_local",
      createdAt: trailingRunStart,
      startedAt: trailingRunStart,
      finishedAt: trailingRunStart,
      hasStoredOutput: true,
    };
    const trailingTranscriptEntries: readonly IssueChatTranscriptEntry[] = [
      {
        kind: "assistant",
        ts: trailingRunStart.toISOString(),
        text: "Trailing run posted after the latest comment.",
      },
    ];
    const transcriptsByRunId = new Map(issueChatLongThreadTranscriptsByRunId);
    transcriptsByRunId.set(trailingRun.runId, trailingTranscriptEntries);
    const linkedRuns: IssueChatLinkedRun[] = [
      ...issueChatLongThreadLinkedRuns,
      trailingRun,
    ];

    container.remove();
    const scrollHost = document.createElement("main");
    scrollHost.id = "main-content";
    scrollHost.style.overflowY = "auto";
    scrollHost.style.overflow = "auto";
    scrollHost.style.height = "800px";
    Object.defineProperty(scrollHost, "scrollHeight", {
      configurable: true,
      get: () => 200_000,
    });
    Object.defineProperty(scrollHost, "clientHeight", {
      configurable: true,
      get: () => 800,
    });
    document.body.appendChild(scrollHost);
    container = document.createElement("div");
    scrollHost.appendChild(container);

    const elementScrollToMock = vi.fn();
    scrollHost.scrollTo =
      elementScrollToMock as unknown as typeof scrollHost.scrollTo;

    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: linkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        transcriptsByRunId: transcriptsByRunId,
        hasOutputForRun: (runId) => transcriptsByRunId.has(runId),
      });
    });

    const virtualizerEl = container.querySelector<HTMLDivElement>(
      '[data-testid="issue-chat-thread-virtualizer"]',
    );
    expect(virtualizerEl).not.toBeNull();
    const totalMergedRows = Number(virtualizerEl?.dataset.virtualCount ?? "0");
    expect(totalMergedRows).toBeGreaterThan(VIRTUALIZED_THREAD_ROW_THRESHOLD);

    elementScrollToMock.mockClear();

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    act(() => {
      jump?.click();
    });

    const smoothCalls = elementScrollToMock.mock.calls
      .map((call) => call[0] as ScrollToOptions)
      .filter(hasSmoothScrollBehavior);
    expect(smoothCalls.length).toBeGreaterThan(0);

    // For align="end" with the very last index, tanstack-virtual short-circuits
    // to getMaxScrollOffset() (= scrollHeight - clientHeight = 199_200 here).
    // A jump to the latest comment row (one slot earlier) lands at item.end -
    // clientHeight, which is strictly less. Asserting top < maxScrollOffset
    // proves the button isn't routing to the trailing run row.
    const maxScrollOffset = 200_000 - 800;
    const lastTop = smoothCalls[smoothCalls.length - 1]?.top;
    expect(typeof lastTop).toBe("number");
    expect(lastTop as number).toBeLessThan(maxScrollOffset);
    expect(lastTop as number).toBeGreaterThan(0);

    act(() => {
      root.unmount();
    });
    scrollHost.remove();
  });

  // Regression for PAP-2672 follow-up: clicking Jump to latest must refresh
  // the comments page so a comment that arrived after the initial load is
  // present before we scroll. Otherwise the user lands on the latest *loaded*
  // comment but not the absolute newest.
  it("invokes onRefreshLatestComments before scrolling on Jump to latest", async () => {
    const refreshMock = vi.fn(async () => undefined);
    const directComments = issueChatLongThreadComments.slice(0, 8);

    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: directComments,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        onRefreshLatestComments: refreshMock,
      });
    });

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    act(() => {
      jump?.click();
    });

    expect(refreshMock).toHaveBeenCalledTimes(1);

    act(() => {
      root.unmount();
    });
  });

  it("uses comments rendered by onRefreshLatestComments before resolving latest", async () => {
    const scrolledIds: string[] = [];
    const originalScrollIntoView = Element.prototype.scrollIntoView;
    Element.prototype.scrollIntoView = vi.fn(function scrollIntoView(
      this: Element,
    ) {
      scrolledIds.push(this.id);
    }) as unknown as typeof Element.prototype.scrollIntoView;

    const olderComment = {
      id: "comment-before-refresh",
      companyId: "company-1",
      issueId: "issue-1",
      authorAgentId: "agent-perf-codex",
      authorUserId: null,
      body: "Older loaded comment",
      authorType: "agent" as const,
      presentation: null,
      metadata: null,
      createdAt: new Date("2026-04-06T12:00:00.000Z"),
      updatedAt: new Date("2026-04-06T12:00:00.000Z"),
    };
    const latestComment = {
      ...olderComment,
      id: "comment-after-refresh",
      body: "Latest fetched comment",
      createdAt: new Date("2026-04-06T12:01:00.000Z"),
      updatedAt: new Date("2026-04-06T12:01:00.000Z"),
    };

    function RefreshingThread() {
      const [comments, setComments] = useState([olderComment]);
      return (
        <IssueChatThread
          comments={comments}
          linkedRuns={[]}
          timelineEvents={[]}
          liveRuns={[]}
          agentMap={issueChatLongThreadAgentMap}
          currentUserId="user-board"
          onAdd={async () => {}}
          enableLiveTranscriptPolling={false}
          onRefreshLatestComments={async () => {
            setComments([olderComment, latestComment]);
            await new Promise((resolve) =>
              window.requestAnimationFrame(resolve),
            );
          }}
        />
      );
    }

    const root = createRoot(container);
    await act(async () => {
      root.render(
        <MemoryRouter>
          <RefreshingThread />
        </MemoryRouter>,
      );
    });

    const jump = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent === "Jump to latest",
    ) as HTMLButtonElement | undefined;
    expect(jump).toBeDefined();

    await act(async () => {
      jump?.click();
      await new Promise((resolve) => window.requestAnimationFrame(resolve));
    });

    expect(scrolledIds).toContain("comment-comment-after-refresh");

    Element.prototype.scrollIntoView = originalScrollIntoView;
    act(() => {
      root.unmount();
    });
  });

  it("findLatestCommentMessageIndex prefers the last comment-anchored row (PAP-2672)", () => {
    const messages = [
      { metadata: { custom: { anchorId: "comment-a" } } },
      { metadata: { custom: { anchorId: "run-1" } } },
      { metadata: { custom: { anchorId: "comment-b" } } },
      { metadata: { custom: { anchorId: "run-2" } } },
      { metadata: { custom: { anchorId: "activity-3" } } },
    ];
    expect(findLatestCommentMessageIndex(messages as never)).toBe(2);
    expect(
      findLatestCommentMessageIndex([
        { metadata: { custom: { anchorId: "run-only" } } },
      ] as never),
    ).toBe(-1);
    expect(findLatestCommentMessageIndex([] as never)).toBe(-1);
  });

  it("keeps the direct render path for short threads under the virtualization threshold", () => {
    const root = createRoot(container);
    const directComments = issueChatLongThreadComments.slice(0, 12);

    act(() => {
      renderIssueThread(root, {
        comments: directComments,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        showComposer: false,
        showJumpToLatest: false,
      });
    });

    expect(
      container.querySelector('[data-testid="issue-chat-thread-virtualizer"]'),
    ).toBeNull();
    const rows = container.querySelectorAll(
      '[data-testid="issue-chat-message-row"]',
    );
    expect(rows.length).toBe(directComments.length);

    act(() => {
      root.unmount();
    });
  });

  it("keeps the viewport anchored when virtualized rows above it remeasure", () => {
    expect(
      getVirtualizedMeasurementScrollAdjustment({
        itemStart: 200,
        previousSize: 220,
        nextSize: 360,
        viewportStart: 480,
      }),
    ).toBe(140);

    expect(
      getVirtualizedMeasurementScrollAdjustment({
        itemStart: 200,
        previousSize: 360,
        nextSize: 180,
        viewportStart: 620,
      }),
    ).toBe(-180);
  });

  it("does not scroll-anchor virtualized measurement changes inside the viewport", () => {
    expect(
      getVirtualizedMeasurementScrollAdjustment({
        itemStart: 420,
        previousSize: 220,
        nextSize: 360,
        viewportStart: 480,
      }),
    ).toBe(0);
  });

  it("renders virtualized rows with the same role/kind metadata as the direct path", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        showComposer: false,
        showJumpToLatest: false,
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: (runId) =>
          issueChatLongThreadTranscriptsByRunId.has(runId),
      });
    });

    const rows = container.querySelectorAll(
      '[data-testid="issue-chat-message-row"]',
    );
    expect(rows.length).toBeGreaterThan(0);
    const roles = new Set<string>();
    const kinds = new Set<string>();
    for (const row of Array.from(rows)) {
      const element = row as HTMLDivElement;
      const role = element.dataset.messageRole;
      const kind = element.dataset.messageKind;
      if (role) roles.add(role);
      if (kind) kinds.add(kind);
    }
    expect(roles.size).toBeGreaterThan(0);
    expect(kinds.size).toBeGreaterThan(0);

    act(() => {
      root.unmount();
    });
  });

  it("does not re-render long-thread markdown rows for unrelated layout updates", () => {
    const root = createRoot(container);
    const onAdd = async () => {};
    const hasOutputForRun = (runId: string) =>
      issueChatLongThreadTranscriptsByRunId.has(runId);

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        onAdd: onAdd,
        showComposer: false,
        showJumpToLatest: false,
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: hasOutputForRun,
      });
    });

    expect(markdownBodyRenderMock).toHaveBeenCalled();
    markdownBodyRenderMock.mockClear();

    act(() => {
      renderIssueThread(root, {
        comments: issueChatLongThreadComments,
        linkedRuns: issueChatLongThreadLinkedRuns,
        timelineEvents: issueChatLongThreadEvents,
        agentMap: issueChatLongThreadAgentMap,
        currentUserId: "user-board",
        onAdd: onAdd,
        showComposer: false,
        showJumpToLatest: true,
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: hasOutputForRun,
      });
    });

    expect(markdownBodyRenderMock).not.toHaveBeenCalled();

    act(() => {
      root.unmount();
    });
  });

  it("does not re-render unchanged markdown when feedback votes change", () => {
    const root = createRoot(container);
    const onAdd = async () => {};
    const onVote = async () => {};
    const comments = [
      {
        id: "comment-agent-feedback",
        companyId: "company-1",
        issueId: "issue-1",
        authorAgentId: "agent-1",
        authorUserId: null,
        body: "Agent summary with **markdown**",
        authorType: "agent" as const,
        presentation: null,
        metadata: null,
        createdAt: new Date("2026-04-06T12:00:00.000Z"),
        updatedAt: new Date("2026-04-06T12:00:00.000Z"),
      },
    ];

    act(() => {
      renderIssueThread(root, {
        comments: comments,
        onAdd: onAdd,
        onVote: onVote,
        feedbackVotes: [],
        showComposer: false,
      });
    });

    expect(markdownBodyRenderMock).toHaveBeenCalled();
    markdownBodyRenderMock.mockClear();

    act(() => {
      renderIssueThread(root, {
        comments: comments,
        onAdd: onAdd,
        onVote: onVote,
        feedbackVotes: [
          {
            id: "feedback-1",
            companyId: "company-1",
            issueId: "issue-1",
            targetType: "issue_comment",
            targetId: "comment-agent-feedback",
            authorUserId: "user-1",
            vote: "up",
            reason: null,
            sharedWithLabs: false,
            sharedAt: null,
            consentVersion: null,
            redactionSummary: null,
            createdAt: new Date("2026-04-06T12:01:00.000Z"),
            updatedAt: new Date("2026-04-06T12:01:00.000Z"),
          },
        ],
        showComposer: false,
      });
    });

    expect(markdownBodyRenderMock).not.toHaveBeenCalled();

    act(() => {
      root.unmount();
    });
  });

  it("renders a genuine agent comment in the conference-room neutral bubble (PAP-97 rev 7)", () => {
    const root = createRoot(container);
    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-agent-bubble",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: "agent-1",
            authorUserId: null,
            body: "Here is my agent reply.",
            authorType: "agent" as const,
            presentation: null,
            metadata: null,
            createdAt: new Date("2026-04-06T12:00:00.000Z"),
            updatedAt: new Date("2026-04-06T12:00:00.000Z"),
          },
        ],
        currentUserId: "user-board",
        showComposer: false,
      });
    });

    // Conference-room canonical agent bubble: bg-card + border + tail corner.
    const bubble = Array.from(container.querySelectorAll("div")).find(
      (el) =>
        el.className.includes("bg-card") &&
        el.className.includes("border-border") &&
        el.className.includes("[border-radius:14px_14px_14px_4px]"),
    );
    expect(bubble).toBeDefined();
    expect(bubble?.textContent).toContain("Here is my agent reply.");
    expect(bubble?.className).toContain("max-w-(--sz-calc-7)");
    expect(bubble?.className).toContain("sm:max-w-(--pct-85)");
    // Neutral, not the human liveness-blue bubble (--liveness-blue, DECISION-SHEET.md A6).
    expect(bubble?.className).not.toContain("bg-(--liveness-blue)");

    act(() => {
      root.unmount();
    });
  });

  it("confirms and invokes delete only for the current user's normal comments", async () => {
    const root = createRoot(container);
    const onDeleteComment = vi.fn(async () => {});

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-owned",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-board",
            body: "Delete me",
            authorType: "user",
            presentation: null,
            metadata: null,
            createdAt: new Date("2026-04-06T12:00:00.000Z"),
            updatedAt: new Date("2026-04-06T12:00:00.000Z"),
          },
          {
            id: "comment-other",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-other",
            body: "Do not delete",
            authorType: "user",
            presentation: null,
            metadata: null,
            createdAt: new Date("2026-04-06T12:01:00.000Z"),
            updatedAt: new Date("2026-04-06T12:01:00.000Z"),
          },
        ],
        currentUserId: "user-board",
        onDeleteComment: onDeleteComment,
        showComposer: false,
      });
    });

    const deleteButtons = Array.from(
      container.querySelectorAll("button[aria-label='Delete comment']"),
    );
    expect(deleteButtons).toHaveLength(1);

    await act(async () => {
      deleteButtons[0]?.dispatchEvent(
        new MouseEvent("click", { bubbles: true }),
      );
    });

    expect(document.body.textContent).toContain("Delete comment?");
    const confirmButton = Array.from(
      document.body.querySelectorAll("button"),
    ).find((button) => button.textContent === "Delete comment");
    expect(confirmButton).toBeTruthy();

    await act(async () => {
      confirmButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(onDeleteComment).toHaveBeenCalledWith("comment-owned");

    act(() => {
      root.unmount();
    });
  });

  it("renders deleted comments as tombstones without the original body", () => {
    const root = createRoot(container);

    flushAct(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-deleted",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-board",
            body: "Sensitive deleted body",
            authorType: "user",
            presentation: null,
            metadata: null,
            deletedAt: new Date("2026-04-06T12:05:00.000Z"),
            deletedByType: "user",
            deletedByUserId: "user-board",
            createdAt: new Date("2026-04-06T12:00:00.000Z"),
            updatedAt: new Date("2026-04-06T12:05:00.000Z"),
          },
        ],
        currentUserId: "user-board",
        onDeleteComment: async () => {},
        showComposer: false,
      });
    });

    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();

    flushAct(() => {
      root.unmount();
    });
  });

  it("clears a deleted comment deep-link hash instead of highlighting it", () => {
    const root = createRoot(container);
    const replaceStateSpy = vi
      .spyOn(window.history, "replaceState")
      .mockImplementation(() => {});

    flushAct(() => {
      root.render(
        <MemoryRouter
          initialEntries={["/issues/PAP-1#comment-comment-deleted"]}
        >
          <IssueChatThread
            comments={[
              {
                id: "comment-deleted",
                companyId: "company-1",
                issueId: "issue-1",
                authorAgentId: null,
                authorUserId: "user-board",
                body: "Sensitive deleted body",
                authorType: "user",
                presentation: null,
                metadata: null,
                deletedAt: new Date("2026-04-06T12:05:00.000Z"),
                deletedByType: "user",
                deletedByUserId: "user-board",
                createdAt: new Date("2026-04-06T12:00:00.000Z"),
                updatedAt: new Date("2026-04-06T12:05:00.000Z"),
              },
            ]}
            currentUserId="user-board"
            linkedRuns={[]}
            timelineEvents={[]}
            liveRuns={[]}
            onAdd={async () => {}}
            showComposer={false}
            enableLiveTranscriptPolling={false}
          />
        </MemoryRouter>,
      );
    });

    expect(replaceStateSpy).toHaveBeenCalledWith(null, "", "/issues/PAP-1");

    replaceStateSpy.mockRestore();
    flushAct(() => {
      root.unmount();
    });
  });

  it("shows explicit follow-up badges and event copy", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-1",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "local-board",
            body: "Please continue validation.",
            authorType: "user",
            presentation: null,
            metadata: null,
            followUpRequested: true,
            createdAt: new Date("2026-03-11T10:00:00.000Z"),
            updatedAt: new Date("2026-03-11T10:00:00.000Z"),
          },
        ],
        timelineEvents: [
          {
            id: "event-1",
            actorType: "agent",
            actorId: "agent-1",
            createdAt: new Date("2026-03-11T10:00:00.000Z"),
            commentId: "comment-1",
            followUpRequested: true,
          },
        ],
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Follow-up");
    expect(container.textContent).toContain("requested follow-up");

    act(() => {
      root.unmount();
    });
  });

  it("shows unresolved blocker context above the composer", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        issueStatus: "todo",
        blockedBy: [
          {
            id: "blocker-1",
            identifier: "PAP-1723",
            title: "QA the install flow",
            status: "blocked",
            priority: "medium",
            assigneeAgentId: "agent-1",
            assigneeUserId: null,
          },
        ],
      });
    });

    expect(container.textContent).toContain("PAP-1723");
    expect(container.textContent).toContain("QA the install flow");
    expect(
      container.querySelector('[data-issue-path-id="PAP-1723"]'),
    ).not.toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("shows terminal blocker context when an immediate blocker is transitively blocked", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        issueStatus: "blocked",
        blockedBy: [
          {
            id: "blocker-1",
            identifier: "PAP-2167",
            title: "Phase 7 review",
            status: "blocked",
            priority: "medium",
            assigneeAgentId: "agent-1",
            assigneeUserId: null,
            terminalBlockers: [
              {
                id: "terminal-1",
                identifier: "PAP-2201",
                title: "Security sign-off",
                status: "todo",
                priority: "high",
                assigneeAgentId: "agent-2",
                assigneeUserId: null,
              },
            ],
          },
        ],
      });
    });

    expect(container.textContent).toContain("PAP-2167");
    expect(container.textContent).toContain("Phase 7 review");
    expect(container.textContent).toContain("Ultimately waiting on");
    expect(container.textContent).toContain("PAP-2201");
    expect(container.textContent).toContain("Security sign-off");
    expect(
      container.querySelector('[data-issue-path-id="PAP-2201"]'),
    ).not.toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("renders the blue 'Waiting on live work' variant when the blocker chain is covered", () => {
    const root = createRoot(container);

    flushAct(() => {
      renderIssueThread(root, {
        issueStatus: "blocked",
        liveIssueIds: new Set(["blocker-run"]),
        blockerAttention: {
          state: "covered",
          reason: "active_dependency",
          unresolvedBlockerCount: 3,
          coveredBlockerCount: 3,
          stalledBlockerCount: 0,
          attentionBlockerCount: 0,
          sampleBlockerIdentifier: "PAP-2002",
          sampleStalledBlockerIdentifier: null,
        },
        blockedBy: [
          {
            id: "blocker-done",
            identifier: "PAP-2001",
            title: "Server work",
            status: "done",
            priority: "medium",
            assigneeAgentId: "agent-1",
            assigneeUserId: null,
          },
          {
            id: "blocker-run",
            identifier: "PAP-2002",
            title: "UI work",
            status: "in_progress",
            priority: "medium",
            assigneeAgentId: "agent-2",
            assigneeUserId: null,
          },
          {
            id: "blocker-queued",
            identifier: "PAP-2003",
            title: "QA gate",
            status: "todo",
            priority: "medium",
            assigneeAgentId: "agent-3",
            assigneeUserId: null,
          },
        ],
      });
    });

    const notice = container.querySelector(
      '[data-testid="issue-blocked-notice-live"]',
    );
    expect(notice).not.toBeNull();
    expect(notice?.getAttribute("data-blocker-attention-state")).toBe(
      "covered",
    );
    expect(container.textContent).toContain("Waiting on live work");
    expect(container.textContent).toContain(
      "resumes automatically when the chain is done",
    );
    // Progress counts: 1 done, 1 running out of 3.
    expect(container.textContent).toContain("1 of 3 done · 1 running");
    // Amber "Ultimately waiting on" / "blocked by the linked task" copy is gone.
    expect(container.textContent).not.toContain("Ultimately waiting on");
    expect(container.textContent).not.toContain(
      "Work on this task is blocked by",
    );
    // All three blockers render as chips.
    expect(
      container.querySelector('[data-issue-path-id="PAP-2001"]'),
    ).not.toBeNull();
    expect(
      container.querySelector('[data-issue-path-id="PAP-2002"]'),
    ).not.toBeNull();
    expect(
      container.querySelector('[data-issue-path-id="PAP-2003"]'),
    ).not.toBeNull();

    flushAct(() => {
      root.unmount();
    });
  });

  it("shows a 'Now running' row replacing 'Ultimately waiting on' when the terminal leaf is live", () => {
    const root = createRoot(container);

    flushAct(() => {
      renderIssueThread(root, {
        issueStatus: "blocked",
        liveIssueIds: new Set(["terminal-live"]),
        blockerAttention: {
          state: "covered",
          reason: "active_dependency",
          unresolvedBlockerCount: 1,
          coveredBlockerCount: 1,
          stalledBlockerCount: 0,
          attentionBlockerCount: 0,
          sampleBlockerIdentifier: "PAP-3001",
          sampleStalledBlockerIdentifier: null,
        },
        blockedBy: [
          {
            id: "blocker-mid",
            identifier: "PAP-3001",
            title: "Phase 7 review",
            status: "blocked",
            priority: "medium",
            assigneeAgentId: "agent-1",
            assigneeUserId: null,
            terminalBlockers: [
              {
                id: "terminal-live",
                identifier: "PAP-3002",
                title: "Security sign-off",
                status: "in_progress",
                priority: "high",
                assigneeAgentId: "agent-2",
                assigneeUserId: null,
              },
            ],
          },
        ],
      });
    });

    const nowRunning = container.querySelector(
      '[data-testid="issue-blocked-notice-now-running"]',
    );
    expect(nowRunning).not.toBeNull();
    expect(nowRunning?.textContent).toContain("Now running");
    expect(nowRunning?.textContent).toContain("PAP-3002");
    expect(container.textContent).not.toContain("Ultimately waiting on");

    flushAct(() => {
      root.unmount();
    });
  });

  it("keeps the parked-work row amber inside the blue variant", () => {
    const root = createRoot(container);

    flushAct(() => {
      renderIssueThread(root, {
        issueStatus: "blocked",
        liveIssueIds: new Set(["blocker-run"]),
        blockerAttention: {
          state: "covered",
          reason: "active_dependency",
          unresolvedBlockerCount: 2,
          coveredBlockerCount: 2,
          stalledBlockerCount: 0,
          attentionBlockerCount: 0,
          sampleBlockerIdentifier: "PAP-4001",
          sampleStalledBlockerIdentifier: null,
        },
        blockedBy: [
          {
            id: "blocker-run",
            identifier: "PAP-4001",
            title: "UI work",
            status: "in_progress",
            priority: "medium",
            assigneeAgentId: "agent-1",
            assigneeUserId: null,
          },
          {
            id: "blocker-parked",
            identifier: "PAP-4002",
            title: "Parked backlog task",
            status: "backlog",
            priority: "medium",
            assigneeAgentId: "agent-2",
            assigneeUserId: null,
          },
        ],
      });
    });

    expect(
      container.querySelector('[data-testid="issue-blocked-notice-live"]'),
    ).not.toBeNull();
    const parkedRow = container.querySelector(
      '[data-testid="issue-blocked-notice-parked-row"]',
    );
    expect(parkedRow).not.toBeNull();
    expect(parkedRow?.textContent).toContain("Blocked by parked work");
    // Parked label keeps its amber tone even inside the blue box.
    expect(parkedRow?.querySelector(".text-amber-800")).not.toBeNull();

    flushAct(() => {
      root.unmount();
    });
  });

  it("keeps the amber notice byte-for-byte for stalled / needs_attention / none states", () => {
    for (const state of ["stalled", "needs_attention", "none"] as const) {
      const root = createRoot(container);

      flushAct(() => {
        renderIssueThread(root, {
          issueStatus: "blocked",
          liveIssueIds: new Set(["blocker-1"]),
          blockerAttention: {
            state,
            reason: state === "stalled" ? "stalled_review" : null,
            unresolvedBlockerCount: 1,
            coveredBlockerCount: 0,
            stalledBlockerCount: state === "stalled" ? 1 : 0,
            attentionBlockerCount: state === "needs_attention" ? 1 : 0,
            sampleBlockerIdentifier: "PAP-5001",
            sampleStalledBlockerIdentifier:
              state === "stalled" ? "PAP-5001" : null,
          },
          blockedBy: [
            {
              id: "blocker-1",
              identifier: "PAP-5001",
              title: "Review task",
              status: "in_review",
              priority: "medium",
              assigneeAgentId: "agent-1",
              assigneeUserId: null,
            },
          ],
        });
      });

      // Blue variant never appears for non-covered states.
      expect(
        container.querySelector('[data-testid="issue-blocked-notice-live"]'),
      ).toBeNull();
      // The amber container (with the canonical attention data attribute) does.
      const amber = container.querySelector(
        `[data-blocker-attention-state="${state}"]`,
      );
      expect(amber).not.toBeNull();
      expect(amber?.className).toContain("border-amber-300/70");
      if (state === "stalled") {
        expect(container.textContent).toContain("Stalled in review");
      }

      flushAct(() => {
        root.unmount();
      });
    }
  });

  it("shows paused responsible agent context above the composer", () => {
    const root = createRoot(container);
    const pausedAgent = {
      id: "agent-1",
      companyId: "company-1",
      name: "CodexCoder",
      status: "paused",
      pauseReason: "manual",
    } as Agent;

    act(() => {
      renderIssueThread(root, {
        agentMap: new Map([["agent-1", pausedAgent]]),
        currentAssigneeValue: "agent:agent-1",
      });
    });

    expect(container.textContent).toContain("CodexCoder is paused");
    expect(container.textContent).toContain(
      "New runs will not start until the agent is resumed",
    );
    expect(container.textContent).toContain("It was paused manually");

    act(() => {
      root.unmount();
    });
  });

  it("supports the embedded read-only variant without the jump control", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        showComposer: false,
        showJumpToLatest: false,
        variant: "embedded",
        emptyMessage: "No run output captured.",
      });
    });

    expect(container.textContent).toContain("No run output captured.");
    expect(container.textContent).not.toContain("Jump to latest");

    const viewport = container.querySelector(
      '[data-testid="thread-viewport"]',
    ) as HTMLDivElement | null;
    expect(viewport?.className).toContain("space-y-3");

    act(() => {
      root.unmount();
    });
  });

  it("invokes the accept callback for pending suggested-task interactions", async () => {
    const root = createRoot(container);
    const onAcceptInteraction = vi.fn(async () => undefined);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [createSuggestedTasksInteraction()],
        onAcceptInteraction: onAcceptInteraction,
        showComposer: false,
      });
    });

    const acceptButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Accept drafts"),
    );
    expect(acceptButton).toBeTruthy();

    await act(async () => {
      acceptButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(onAcceptInteraction).toHaveBeenCalledWith(
      expect.objectContaining({
        id: "interaction-suggest-1",
        kind: "suggest_tasks",
      }),
      ["task-1"],
    );

    act(() => {
      root.unmount();
    });
  });

  it("submits only the selected draft subtree when tasks are manually pruned", async () => {
    const root = createRoot(container);
    const onAcceptInteraction = vi.fn(async () => undefined);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [
          createSuggestedTasksInteraction({
            payload: {
              version: 1,
              tasks: [
                {
                  clientKey: "root",
                  title: "Root task",
                },
                {
                  clientKey: "child",
                  parentClientKey: "root",
                  title: "Child task",
                },
              ],
            },
          }),
        ],
        onAcceptInteraction: onAcceptInteraction,
        showComposer: false,
      });
    });

    const childCheckbox = container.querySelector(
      '[aria-label="Include Child task"]',
    );
    expect(childCheckbox).toBeTruthy();

    await act(async () => {
      childCheckbox?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });
    const acceptButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Accept selected drafts"),
    );
    expect(acceptButton).toBeTruthy();
    await act(async () => {
      acceptButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(onAcceptInteraction).toHaveBeenCalledWith(
      expect.objectContaining({
        id: "interaction-suggest-1",
        kind: "suggest_tasks",
      }),
      ["root"],
    );

    act(() => {
      root.unmount();
    });
  });

  it("submits selected answers for pending question interactions", async () => {
    const root = createRoot(container);
    const onSubmitInteractionAnswers = vi.fn(async () => undefined);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [createQuestionInteraction()],
        onSubmitInteractionAnswers: onSubmitInteractionAnswers,
        showComposer: false,
      });
    });

    const optionButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Phase 1"),
    );
    const submitButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Submit answers"),
    );
    expect(optionButton).toBeTruthy();
    expect(submitButton).toBeTruthy();

    await act(async () => {
      optionButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });
    await act(async () => {
      submitButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(onSubmitInteractionAnswers).toHaveBeenCalledWith(
      expect.objectContaining({
        id: "interaction-question-1",
        kind: "ask_user_questions",
      }),
      [{ questionId: "scope", optionIds: ["phase-1"] }],
    );

    act(() => {
      root.unmount();
    });
  });

  it("submits Other text for pending question interactions", async () => {
    const root = createRoot(container);
    const onSubmitInteractionAnswers = vi.fn(async () => undefined);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [createQuestionInteraction()],
        onSubmitInteractionAnswers: onSubmitInteractionAnswers,
        showComposer: false,
      });
    });

    const otherButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Other"),
    );
    expect(otherButton).toBeTruthy();

    await act(async () => {
      otherButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    const textarea = container.querySelector(
      "textarea",
    ) as HTMLTextAreaElement | null;
    expect(textarea).toBeTruthy();

    await act(async () => {
      const valueSetter = Object.getOwnPropertyDescriptor(
        HTMLTextAreaElement.prototype,
        "value",
      )?.set;
      valueSetter?.call(textarea, "Phase 1 plus docs");
      textarea!.dispatchEvent(new Event("input", { bubbles: true }));
    });

    const submitButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Submit answers"),
    );

    await act(async () => {
      submitButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(onSubmitInteractionAnswers).toHaveBeenCalledWith(
      expect.objectContaining({
        id: "interaction-question-1",
        kind: "ask_user_questions",
      }),
      [{ questionId: "scope", optionIds: [], otherText: "Phase 1 plus docs" }],
    );

    act(() => {
      root.unmount();
    });
  });

  it("invokes the cancel callback for pending question interactions", async () => {
    const root = createRoot(container);
    const onCancelInteraction = vi.fn(async () => undefined);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [createQuestionInteraction()],
        onCancelInteraction: onCancelInteraction,
        showComposer: false,
      });
    });

    const cancelButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Cancel question"),
    );
    expect(cancelButton).toBeTruthy();

    await act(async () => {
      cancelButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(onCancelInteraction).toHaveBeenCalledWith(
      expect.objectContaining({
        id: "interaction-question-1",
        kind: "ask_user_questions",
      }),
    );

    act(() => {
      root.unmount();
    });
  });

  it("folds expired request confirmations into an activity row by default", async () => {
    const root = createRoot(container);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [createExpiredRequestConfirmationInteraction()],
        currentUserId: "user-1",
        userLabelMap: new Map([["user-1", "Dotta"]]),
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Dotta");
    expect(container.textContent).toContain("updated this task");
    expect(container.textContent).toContain("Expired confirmation");
    expect(container.textContent).not.toContain("Approve the plan");

    const toggleButton = Array.from(container.querySelectorAll("button")).find(
      (button) => button.textContent?.includes("Expired confirmation"),
    );
    expect(toggleButton).toBeTruthy();

    await act(async () => {
      toggleButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });

    expect(container.textContent).toContain("Approve the plan");
    expect(container.textContent).toContain(
      "Confirmation expired after comment",
    );

    act(() => {
      root.unmount();
    });
  });

  it("renders expired secret proposals as full receipts by default", async () => {
    const root = createRoot(container);

    await act(async () => {
      renderIssueThread(root, {
        interactions: [expiredSecretProposalInteraction],
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Secret binding requested");
    expect(container.textContent).toContain("OpenAI API key");
    expect(container.textContent).toContain("access.evals_openai_api_key");
    expect(container.textContent).toContain("EvalsEngineer");
    expect(container.textContent).toContain("A fresh proposal is required");
    expect(container.textContent).not.toContain("updated this task");

    act(() => {
      root.unmount();
    });
  });

  it("renders the transcript directly from stable Paperclip messages", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-1",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: "agent-1",
            authorUserId: null,
            body: "Agent summary",
            authorType: "agent",
            presentation: null,
            metadata: null,
            createdAt: new Date("2026-04-06T12:00:00.000Z"),
            updatedAt: new Date("2026-04-06T12:00:00.000Z"),
          },
        ],
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Agent summary");
    expect(container.textContent).not.toContain(
      "Chat renderer hit an internal state error.",
    );

    act(() => {
      root.unmount();
    });
  });

  it("hides queued interrupt and cancel actions until the task resumes", () => {
    const root = createRoot(container);
    const comments = [{
      id: "comment-paused-queue", companyId: "company-1", issueId: "issue-1",
      authorAgentId: null, authorUserId: "user-1", authorType: "user" as const,
      body: "Keep this queued message", presentation: null, metadata: null,
      queueState: "queued" as const, queueTargetRunId: "run-1",
      createdAt: new Date(), updatedAt: new Date(),
    }];
    for (const paused of [false, true, false]) {
      act(() => root.render(<MemoryRouter><IssueChatThread
        comments={comments} onAdd={async () => {}}
        onInterruptQueued={async () => {}} onCancelQueued={() => {}}
        composerPause={paused ? { scope: "leaf", onResume: () => {} } : null}
        enableLiveTranscriptPolling={false}
      /></MemoryRouter>));
      const labels = [...container.querySelectorAll("button")].map((button) => button.textContent);
      expect(labels.includes("Interrupt")).toBe(!paused);
      expect(labels.includes("Cancel")).toBe(!paused);
      expect(container.textContent).toContain("Keep this queued message");
    }
    act(() => root.unmount());
  });

  it("dispatches queued messages with Interrupt after the target run has stopped", () => {
    const root = createRoot(container);
    const onInterruptQueued = vi.fn(async () => {});
    act(() => root.render(<MemoryRouter><IssueChatThread
      comments={[{ id: "comment-queue", companyId: "company-1", issueId: "issue-1",
        authorAgentId: null, authorUserId: "user-1", authorType: "user", body: "Pending input",
        presentation: null, metadata: null, queueState: "queued", queueTargetRunId: null,
        createdAt: new Date(), updatedAt: new Date() }]}
      onAdd={async () => {}} onInterruptQueued={onInterruptQueued} showComposer={false}
      enableLiveTranscriptPolling={false}
    /></MemoryRouter>));
    const interrupt = [...container.querySelectorAll("button")].find(button => button.textContent === "Interrupt");
    expect(interrupt).toBeDefined();
    act(() => interrupt!.click());
    expect(onInterruptQueued).toHaveBeenCalledWith(null);
    act(() => root.unmount());
  });

  it("shows deferred wake badge only for hold-deferred queued comments", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-hold",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-1",
            body: "Need a quick update",
            authorType: "user",
            presentation: null,
            metadata: null,
            queueState: "queued",
            queueReason: "hold",
            createdAt: new Date("2026-04-06T12:00:00.000Z"),
            updatedAt: new Date("2026-04-06T12:00:00.000Z"),
          },
        ],
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Deferred wake");

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-active-run",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-1",
            body: "Queue behind active run",
            authorType: "user",
            presentation: null,
            metadata: null,
            queueState: "queued",
            queueReason: "active_run",
            createdAt: new Date("2026-04-06T12:01:00.000Z"),
            updatedAt: new Date("2026-04-06T12:01:00.000Z"),
          },
        ],
        showComposer: false,
      });
    });

    expect(container.textContent).toContain("Queued");
    expect(container.textContent).not.toContain("Deferred wake");

    act(() => {
      root.unmount();
    });
  });

  it("preserves a restored draft through the real app StrictMode mount cleanup", () => {
    localStorage.setItem("strict-restored-draft", "Inspect my uploaded file");
    const root = createRoot(container);
    act(() =>
      root.render(
        <StrictMode>
          <MemoryRouter>
            <IssueChatThread
              comments={[]}
              linkedRuns={[]}
              timelineEvents={[]}
              liveRuns={[]}
              onAdd={async () => {}}
              draftKey="strict-restored-draft"
              enableLiveTranscriptPolling={false}
            />
          </MemoryRouter>
        </StrictMode>,
      ),
    );
    expect(
      container.querySelector<HTMLTextAreaElement>(
        'textarea[aria-label="Issue chat editor"]',
      )?.value,
    ).toBe("Inspect my uploaded file");
    expect(localStorage.getItem("strict-restored-draft")).toBe(
      "Inspect my uploaded file",
    );
    act(() => root.unmount());
  });

  it("settles a restored submission only once through StrictMode effect replay", () => {
    const key = "strict-restored-submission";
    const attemptId = "aaf8228f-0be7-45ae-a104-6fbe0af6f1d3";
    const submitted = "One text-only save interrupted by reload.";
    const nextDraft = "A newer draft written while delivery was pending.";
    localStorage.setItem(key, `${submitted}\n\n${nextDraft}`);
    localStorage.setItem(`${key}:submission:v1`, JSON.stringify({
      version: 1,
      draftKey: key,
      attemptId,
      reviewed: false,
      nextDraftOffset: submitted.length + 2,
      submittedAttachmentIds: [],
    }));
    const root = createRoot(container);
    try {
      act(() => root.render(
        <StrictMode>
          <MemoryRouter>
            <IssueChatThread
              comments={[{
                ...issueChatLongThreadComments[0]!,
                id: "confirmed-restored-comment",
                body: submitted,
                authorAgentId: null,
                authorUserId: "user-1",
                clientRequestId: attemptId,
              }]}
              currentUserId="user-1"
              linkedRuns={[]}
              timelineEvents={[]}
              liveRuns={[]}
              onAdd={async () => {}}
              draftKey={key}
              enableLiveTranscriptPolling={false}
            />
          </MemoryRouter>
        </StrictMode>,
      ));
      expect(container.querySelector<HTMLTextAreaElement>(
        'textarea[aria-label="Issue chat editor"]',
      )?.value).toBe(nextDraft);
      expect(localStorage.getItem(key)).toBe(nextDraft);
      expect(localStorage.getItem(`${key}:submission:v1`)).toBeNull();
      expect(container.textContent).not.toContain("We couldn’t confirm");
    } finally {
      act(() => root.unmount());
    }
    expect(localStorage.getItem(key)).toBe(nextDraft);
  });

  it.each(["submission write", "all storage"])(
    "unlocks a confirmed in-memory submission after failed %s",
    async (failure) => {
      const key = "unavailable-submission-storage";
      const originalSetItem = localStorage.setItem.bind(localStorage);
      const write = vi.spyOn(localStorage, "setItem").mockImplementation((key, value) => {
        if (failure === "all storage" || key.endsWith(":submission:v1")) throw new Error("Storage unavailable");
        originalSetItem(key, value);
      });
      const read = failure === "all storage"
        ? vi.spyOn(localStorage, "getItem").mockImplementation(() => { throw new Error("Storage unavailable"); })
        : null;
      let rejectSend!: (error: Error) => void;
      const onAdd = vi.fn().mockReturnValueOnce(new Promise<void>((_, reject) => { rejectSend = reject; })).mockResolvedValue(undefined);
      const root = createRoot(container);
      const element = (attemptId?: string) => (
        <MemoryRouter>
          <IssueChatThread
            comments={attemptId ? [{ ...issueChatLongThreadComments[0]!, id: "confirmed-memory-comment", body: "Earlier message", authorAgentId: null, authorUserId: "user-1", clientRequestId: attemptId }] : []}
            currentUserId="user-1" linkedRuns={[]} timelineEvents={[]} liveRuns={[]}
            onAdd={onAdd} draftKey={key} enableLiveTranscriptPolling={false}
          />
        </MemoryRouter>
      );
      const editor = () => container.querySelector<HTMLTextAreaElement>('textarea[aria-label="Issue chat editor"]')!;
      const type = (value: string) => act(() => {
        Object.getOwnPropertyDescriptor(window.HTMLTextAreaElement.prototype, "value")!.set!.call(editor(), value);
        editor().dispatchEvent(new Event("input", { bubbles: true }));
      });
      const send = () => Array.from(container.querySelectorAll("button")).find(button => button.textContent === "Send") as HTMLButtonElement;
      try {
        await act(async () => root.render(element()));
        type("Earlier message");
        await act(async () => send().click());
        const attemptId = onAdd.mock.calls[0]![4] as string;
        type("The full next draft");
        await act(async () => rejectSend(new CommentSubmissionUnknownError()));
        expect(container.textContent).toContain("We couldn’t confirm");
        await act(async () => root.render(element(attemptId)));
        expect(editor().value).toBe("The full next draft");
        expect(container.textContent).not.toContain("We couldn’t confirm");
        expect(send().disabled).toBe(false);
        await act(async () => send().click());
        expect(onAdd.mock.calls[1]![0]).toBe("The full next draft");
      } finally {
        await act(async () => root.unmount());
        write.mockRestore();
        read?.mockRestore();
      }
    },
  );

  it.each(["newer local text", "foreign pending receipt", "matching text with new attachments", "matching full text with new attachments", "own receipt with newer stored text", "unavailable recovery storage"])(
    "preserves both tabs through settlement and reload: %s",
    async (scenario) => {
      const key = `cross-tab-preserved-${scenario}`;
      const attemptId = "aaf8228f-0be7-45ae-a104-6fbe0af6f1d3";
      const newerId = "baf8228f-0be7-45ae-a104-6fbe0af6f1d3";
      const attachmentId = "caf8228f-0be7-45ae-a104-6fbe0af6f1d3";
      const localText = "This tab's newer unsent draft";
      const otherText = scenario === "matching text with new attachments" ? localText : scenario === "matching full text with new attachments" ? `Earlier message\n\n${localText}` : "The other tab's unsent draft";
      localStorage.setItem(key, `Earlier message\n\n${localText}`);
      localStorage.setItem(`${key}:submission:v1`, JSON.stringify({ version: 1, draftKey: key, attemptId, reviewed: false, nextDraftOffset: 17, submittedAttachmentIds: [] }));
      const element = (confirmed: boolean, foreignConfirmed = false) => (
        <MemoryRouter>
          <IssueChatThread
            comments={confirmed ? [
              { ...issueChatLongThreadComments[0]!, id: "confirmed-cross-tab-comment", body: "Earlier message", authorAgentId: null, authorUserId: "user-1", clientRequestId: attemptId },
              ...(foreignConfirmed ? [{ ...issueChatLongThreadComments[0]!, id: "other-tab-confirmed", body: "Other tab message", authorAgentId: null, authorUserId: "user-1", clientRequestId: newerId }] : []),
            ] : []}
            currentUserId="user-1" linkedRuns={[]} timelineEvents={[]} liveRuns={[]}
            onAdd={async () => {}} draftKey={key} enableLiveTranscriptPolling={false}
          />
        </MemoryRouter>
      );
      let root = createRoot(container);
      const storagePrototype = Object.getPrototypeOf(sessionStorage) as Storage;
      const originalStorageWrite = storagePrototype.setItem;
      const recoveryWrite = scenario === "unavailable recovery storage"
        ? vi.spyOn(storagePrototype, "setItem").mockImplementation(function (this: Storage, key: string, value: string) {
          if (this === sessionStorage) throw new Error("Storage full");
          return originalStorageWrite.call(this, key, value);
        })
        : null;
      try {
        await act(async () => root.render(element(false)));
        if (scenario === "own receipt with newer stored text") localStorage.setItem(key, `Earlier message\n\n${otherText}`);
        else expect(settleDraftSubmission(key, attemptId, otherText)).toBe(true);
        if (scenario === "foreign pending receipt") localStorage.setItem(`${key}:submission:v1`, JSON.stringify({ version: 1, draftKey: key, attemptId: newerId, reviewed: false, nextDraftOffset: 0, submittedAttachmentIds: [] }));
        localStorage.setItem(`${key}:attachments:v1`, JSON.stringify({ version: 1, draftKey: key, attachments: [{ attachmentId, name: "another-tab.txt", inline: false, contentPath: `/api/attachments/${attachmentId}/content` }] }));
        await act(async () => root.render(element(true)));
        const editor = () => container.querySelector<HTMLTextAreaElement>('textarea[aria-label="Issue chat editor"]')!;
        expect(editor().value).toBe(localText);
        expect(container.textContent).not.toContain("We couldn’t confirm");
        if (scenario === "unavailable recovery storage") expect(container.textContent).toContain("copy your text before leaving");
        if (scenario.includes("with new attachments")) expect(container.textContent).toContain("another-tab.txt");
        if (scenario === "foreign pending receipt") {
          localStorage.setItem(key, "The owning tab kept typing after the first receipt");
          await act(async () => root.render(element(true, true)));
          expect(localStorage.getItem(`${key}:submission:v1`)).toContain(newerId);
        } else expect(localStorage.getItem(`${key}:submission:v1`)).toBeNull();
        const storedText = localStorage.getItem(key);
        expect(storedText).toBe(scenario === "foreign pending receipt" ? "The owning tab kept typing after the first receipt" : otherText);
        expect(localStorage.getItem(`${key}:attachments:v1`)).toContain(attachmentId);
        await act(async () => root.unmount());
        expect(localStorage.getItem(key)).toBe(storedText);
        if (scenario === "unavailable recovery storage") return;
        root = createRoot(container);
        await act(async () => root.render(element(true, true)));
        expect(editor().value).toBe(localText);
        if (scenario.includes("with new attachments")) expect(container.textContent).toContain("another-tab.txt");
        expect(localStorage.getItem(key)).toBe(storedText);
        expect(localStorage.getItem(`${key}:attachments:v1`)).toContain(attachmentId);
      } finally {
        if (container.childNodes.length) await act(async () => root.unmount());
        recoveryWrite?.mockRestore();
      }
    },
  );

  it.each(["ordinary", "recovered"])("preserves %s drafts when the same composer switches A to B to A before debounce", async (kind) => {
    vi.useFakeTimers();
    const a = `navigation-a-${kind}`;
    const b = `navigation-b-${kind}`;
    const keys = kind === "recovered"
      ? [preserveDraftInTab(a, "Draft A", []).key, preserveDraftInTab(b, "Draft B", []).key]
      : [a, b];
    if (kind === "ordinary") { localStorage.setItem(a, "Draft A"); localStorage.setItem(b, "Draft B"); }
    const root = createRoot(container);
    const element = (draftKey: string) => (
      <MemoryRouter><IssueChatThread comments={[]} linkedRuns={[]} timelineEvents={[]} liveRuns={[]}
        onAdd={async () => {}} draftKey={draftKey} enableLiveTranscriptPolling={false} /></MemoryRouter>
    );
    const editor = () => container.querySelector<HTMLTextAreaElement>('textarea[aria-label="Issue chat editor"]')!;
    const type = (value: string) => act(() => {
      Object.getOwnPropertyDescriptor(window.HTMLTextAreaElement.prototype, "value")!.set!.call(editor(), value);
      editor().dispatchEvent(new Event("input", { bubbles: true }));
    });
    try {
      await act(async () => root.render(element(a)));
      expect(editor().value).toBe("Draft A");
      type("Draft A typed just now");
      await act(async () => root.render(element(b)));
      expect(editor().value).toBe("Draft B");
      expect(loadDraft(keys[0]!)).toBe("Draft A typed just now");
      type("Draft B typed just now");
      await act(async () => root.render(element(a)));
      expect(editor().value).toBe("Draft A typed just now");
      expect(loadDraft(keys[1]!)).toBe("Draft B typed just now");
    } finally { await act(async () => root.unmount()); }
  });

  it("returns to the shared draft after finishing a recovery and leaving the task", async () => {
    const a = "finished-recovery-a";
    const b = "finished-recovery-b";
    localStorage.setItem(a, "The other tab's preserved draft");
    preserveDraftInTab(a, "My recovered message", []);
    const onAdd = vi.fn().mockResolvedValue(undefined);
    const root = createRoot(container);
    const element = (draftKey: string) => (
      <MemoryRouter><IssueChatThread comments={[]} linkedRuns={[]} timelineEvents={[]} liveRuns={[]}
        onAdd={onAdd} draftKey={draftKey} enableLiveTranscriptPolling={false} /></MemoryRouter>
    );
    const editor = () => container.querySelector<HTMLTextAreaElement>('textarea[aria-label="Issue chat editor"]')!;
    try {
      await act(async () => root.render(element(a)));
      expect(editor().value).toBe("My recovered message");
      await act(async () => (Array.from(container.querySelectorAll("button")).find(button => button.textContent === "Send") as HTMLButtonElement).click());
      expect(onAdd.mock.calls[0]![0]).toBe("My recovered message");
      expect(editor().value).toBe("");
      await act(async () => root.render(element(b)));
      await act(async () => root.render(element(a)));
      expect(editor().value).toBe("The other tab's preserved draft");
      expect(container.textContent).not.toContain("This draft is kept separately");
    } finally { await act(async () => root.unmount()); }
  });

  it("stores and restores the composer draft per issue key", () => {
    vi.useFakeTimers();
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        draftKey: "issue-chat-draft:test-1",
      });
    });

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    expect(editor).not.toBeNull();
    expect(editor?.placeholder).toBe("Reply");

    act(() => {
      const valueSetter = Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )?.set;
      valueSetter?.call(editor, "Draft survives refresh");
      editor?.dispatchEvent(new Event("input", { bubbles: true }));
    });

    act(() => {
      vi.advanceTimersByTime(900);
    });

    expect(localStorage.getItem("issue-chat-draft:test-1")).toBe(
      "Draft survives refresh",
    );

    act(() => {
      root.unmount();
    });

    const remount = createRoot(container);
    act(() => {
      remount.render(
        <MemoryRouter>
          <IssueChatThread
            comments={[]}
            linkedRuns={[]}
            timelineEvents={[]}
            liveRuns={[]}
            onAdd={async () => {}}
            draftKey="issue-chat-draft:test-1"
            enableLiveTranscriptPolling={false}
          />
        </MemoryRouter>,
      );
    });

    const restoredEditor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    expect(restoredEditor?.value).toBe("Draft survives refresh");

    act(() => {
      remount.unmount();
    });
  });

  it("keeps the composer floating with a capped editor height", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root);
    });

    const dock = container.querySelector(
      '[data-testid="issue-chat-composer-dock"]',
    ) as HTMLDivElement | null;
    expect(dock).not.toBeNull();
    expect(dock?.className).toContain("sticky");
    expect(dock?.className).toContain("bottom-(--sz-calc-8)");
    expect(dock?.className).toContain("z-20");

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    expect(composer).not.toBeNull();
    expect(composer?.className).toContain("rounded-md");
    expect(composer?.className).not.toContain("rounded-lg");
    expect(composer?.className).toContain("p-(--sz-15px)");

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    expect(editor?.dataset.contentClassName).toContain("max-h-(--sz-28dvh)");
    expect(editor?.dataset.contentClassName).toContain("overflow-y-auto");
    expect(editor?.dataset.contentClassName).not.toContain("min-h-(--sz-72px)");
    expect(editor?.dataset.fileDropTarget).toBe("parent");

    act(() => {
      root.unmount();
    });
  });

  it("shows full-composer drop instructions while dragging files over the issue composer", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        imageUploadHandler: async () => "/api/attachments/image/content",
        onAttachImage: async () => undefined,
      });
    });

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    expect(composer).not.toBeNull();
    const fileInput = container.querySelector(
      'input[type="file"]',
    ) as HTMLInputElement | null;
    expect(fileInput?.getAttribute("accept")).toBeNull();

    act(() => {
      composer?.dispatchEvent(
        createFileDragEvent("dragenter", [
          new File(["hello"], "notes.txt", { type: "text/plain" }),
        ]),
      );
    });

    expect(
      container.querySelector(
        '[data-testid="issue-chat-composer-drop-overlay"]',
      ),
    ).not.toBeNull();
    expect(container.textContent).toContain("Drop to upload");
    expect(container.textContent).toContain("Images insert into the reply");
    expect(container.textContent).toContain(
      "Other files are added to this task",
    );
    expect(composer?.className).toContain("border-primary/45");

    act(() => {
      root.unmount();
    });
  });

  it("keeps mode controls available while a dropped file uploads", async () => {
    const root = createRoot(container);
    let finishUpload: () => void = () => {};
    const uploadGate = new Promise<void>((resolve) => {
      finishUpload = resolve;
    });
    const onAttachImage = vi.fn(async (file: File) => {
      await uploadGate;
      return {
        id: "attachment-1",
        companyId: "company-1",
        issueId: "issue-1",
        issueCommentId: null,
        assetId: "asset-1",
        provider: "local_disk",
        objectKey: "issues/issue-1/report.pdf",
        contentPath: "/api/attachments/attachment-1/content",
        originalFilename: file.name,
        contentType: file.type,
        byteSize: file.size,
        sha256: "abc123",
        createdByAgentId: null,
        createdByUserId: "user-1",
        createdAt: new Date("2026-04-24T12:00:00.000Z"),
        updatedAt: new Date("2026-04-24T12:00:00.000Z"),
      };
    });

    await act(async () => {
      renderIssueThread(root, {
        onAttachImage: onAttachImage,
        issueWorkMode: "standard",
        onWorkModeChange: () => {},
      });
    });

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    const file = new File(["report body"], "report.pdf", {
      type: "application/pdf",
    });

    act(() => {
      composer?.dispatchEvent(createFileDragEvent("drop", [file]));
    });

    expect(onAttachImage).toHaveBeenCalledWith(file);
    const add = container.querySelector('[data-testid="issue-chat-composer-add"]') as HTMLButtonElement;
    expect(add.disabled).toBe(false);
    act(() => {
      add.dispatchEvent(new PointerEvent("pointerdown", { bubbles: true, button: 0 }));
    });
    expect(document.querySelector('[data-testid="composer-add-file"]')?.getAttribute("data-disabled")).not.toBeNull();
    const plan = document.querySelector('[data-testid="composer-add-plan"]') as HTMLButtonElement;
    act(() => plan.click());
    const chip = container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]') as HTMLButtonElement;
    expect(chip?.textContent).toContain("Plan mode");
    expect(chip.disabled).toBe(false);
    act(() => chip.click());
    expect(container.querySelector('[data-testid="issue-chat-composer-work-mode-chip"]')).toBeNull();

    await act(async () => {
      finishUpload();
    });
    const attachmentList = container.querySelector(
      '[data-testid="issue-chat-composer-attachments"]',
    );
    expect(attachmentList).not.toBeNull();
    expect(container.textContent).toContain("report.pdf");
    expect(container.textContent).toContain("Attached to task");

    await act(async () => {
      root.unmount();
    });
  });

  it("awaits the actual legacy send and retains uploaded receipts after rejection and reload", async () => {
    let root = createRoot(container);
    const onAdd = vi
      .fn()
      .mockRejectedValueOnce(new Error("retry"))
      .mockResolvedValue(undefined);
    const id = "9af8228f-0be7-45ae-a104-6fbe0af6f1d3";
    let resolveUpload!: (value: unknown) => void;
    const onAttachImage = vi.fn().mockReturnValue(
      new Promise((resolve) => {
        resolveUpload = resolve;
      }),
    );
    const element = (
      <MemoryRouter>
        <IssueChatThread
          comments={[]}
          linkedRuns={[]}
          timelineEvents={[]}
          liveRuns={[]}
          onAdd={onAdd}
          onAttachImage={onAttachImage}
          draftKey="legacy-receipt-reload"
          enableLiveTranscriptPolling={false}
        />
      </MemoryRouter>
    );
    await act(async () => root.render(element));
    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    )!;
    const editor = container.querySelector<HTMLTextAreaElement>(
      'textarea[aria-label="Issue chat editor"]',
    )!;
    const send = () =>
      Array.from(container.querySelectorAll("button")).find(
        (element) => element.textContent === "Send",
      ) as HTMLButtonElement;
    act(() => {
      Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )!.set!.call(editor, "Inspect the file");
      editor.dispatchEvent(new Event("input", { bubbles: true }));
      composer.dispatchEvent(
        createFileDragEvent("drop", [
          new File(["fresh"], "fresh.txt", { type: "text/plain" }),
        ]),
      );
    });
    expect(send().disabled).toBe(true);
    await act(async () => {
      resolveUpload({
        id,
        contentPath: `/api/attachments/${id}/content`,
        originalFilename: "fresh.txt",
      });
    });
    expect(send().disabled).toBe(false);
    await act(async () => send().click());
    const expectedBody = `Inspect the file\n\n[fresh.txt](/api/attachments/${id}/content)`;
    expect(onAdd).toHaveBeenNthCalledWith(1, expectedBody, undefined, undefined, [id], expect.any(String));
    expect(appendMock).not.toHaveBeenCalled();
    await act(async () => root.unmount());
    root = createRoot(container);
    await act(async () => root.render(element));
    expect(
      container.querySelector<HTMLTextAreaElement>(
        'textarea[aria-label="Issue chat editor"]',
      )!.value,
    ).toBe("Inspect the file");
    expect(container.textContent).toContain("fresh.txt");
    await act(async () => send().click());
    expect(onAdd).toHaveBeenNthCalledWith(2, expectedBody, undefined, undefined, [id], expect.any(String));
    expect(onAttachImage).toHaveBeenCalledTimes(1);
    await act(async () => root.unmount());
  });

  it.each(["success", "unknown"])(
    "does not overwrite another retained legacy attempt after an older %s",
    async (outcome) => {
      const key = "legacy-exact-attempt-settlement";
      let settle!: () => void;
      const onAdd = vi.fn().mockReturnValue(
        new Promise<void>((resolve, reject) => {
          settle =
            outcome === "success"
              ? resolve
              : () => reject(new CommentSubmissionUnknownError());
        }),
      );
      const root = createRoot(container);
      await act(async () =>
        renderIssueThread(root, {
          onAdd: onAdd,
          draftKey: key,
        }),
      );
      const editor = container.querySelector<HTMLTextAreaElement>(
        'textarea[aria-label="Issue chat editor"]',
      )!;
      act(() => {
        Object.getOwnPropertyDescriptor(
          window.HTMLTextAreaElement.prototype,
          "value",
        )!.set!.call(editor, "Older request");
        editor.dispatchEvent(new Event("input", { bubbles: true }));
      });
      await act(async () =>
        Array.from(container.querySelectorAll("button"))
          .find((button) => button.textContent === "Send")!
          .click(),
      );
      const newer = {
        version: 1,
        draftKey: key,
        attemptId: "aaf8228f-0be7-45ae-a104-6fbe0af6f1d3",
        reviewed: false,
      };
      localStorage.setItem(key, "Newer retained draft");
      localStorage.setItem(`${key}:attachments:v1`, "newer receipt sentinel");
      localStorage.setItem(`${key}:submission:v1`, JSON.stringify(newer));
      await act(async () => settle());
      window.dispatchEvent(new Event("beforeunload"));
      expect(localStorage.getItem(`${key}:submission:v1`)).toBe(
        JSON.stringify(newer),
      );
      expect(localStorage.getItem(key)).toBe("Newer retained draft");
      expect(localStorage.getItem(`${key}:attachments:v1`)).toBe(
        "newer receipt sentinel",
      );
      await act(async () => root.unmount());
    },
  );

  it.each(["late receipt", "reload receipt", "navigation success"])(
    "preserves a newer legacy draft after %s",
    async (outcome) => {
      const key = `legacy-next-draft-${outcome}`;
      let resolveSend!: () => void;
      let rejectSend!: (error: Error) => void;
      const onAdd = vi.fn().mockReturnValue(new Promise<void>((resolve, reject) => {
        resolveSend = resolve;
        rejectSend = reject;
      }));
      const attachmentId = "aaf8228f-0be7-45ae-a104-6fbe0af6f1d3";
      const onAttachImage = vi.fn().mockResolvedValue({
        id: attachmentId, contentPath: `/api/attachments/${attachmentId}/content`, originalFilename: "next-draft.txt",
      });
      let root = createRoot(container);
      const element = (requestId?: string) => (
        <MemoryRouter>
          <IssueChatThread
            comments={requestId ? [{
              ...issueChatLongThreadComments[0]!,
              id: "confirmed-legacy-comment", body: "Earlier message",
              authorAgentId: null, authorUserId: "user-1", clientRequestId: requestId,
            }] : []}
            currentUserId="user-1"
            linkedRuns={[]} timelineEvents={[]} liveRuns={[]}
            onAdd={onAdd} onAttachImage={onAttachImage} draftKey={key} enableLiveTranscriptPolling={false}
          />
        </MemoryRouter>
      );
      const editor = () => container.querySelector<HTMLTextAreaElement>('textarea[aria-label="Issue chat editor"]')!;
      const type = (value: string) => act(() => {
        Object.getOwnPropertyDescriptor(window.HTMLTextAreaElement.prototype, "value")!.set!.call(editor(), value);
        editor().dispatchEvent(new Event("input", { bubbles: true }));
      });
      await act(async () => root.render(element()));
      type("Earlier message");
      await act(async () => Array.from(container.querySelectorAll("button")).find(button => button.textContent === "Send")!.click());
      const requestId = onAdd.mock.calls[0]![4] as string;
      type("Newer unsent draft");
      await act(async () => container.querySelector('[data-testid="issue-chat-composer"]')!
        .dispatchEvent(createFileDragEvent("drop", [new File(["next"], "next-draft.txt", { type: "text/plain" })])));
      if (outcome !== "late receipt") await act(async () => root.unmount());
      if (outcome === "navigation success") await act(async () => resolveSend());
      else if (outcome === "late receipt") await act(async () => rejectSend(new CommentSubmissionUnknownError()));
      if (outcome !== "late receipt") root = createRoot(container);
      await act(async () => root.render(element(requestId)));
      expect(editor().value).toBe("Newer unsent draft");
      expect(localStorage.getItem(key)).toBe("Newer unsent draft");
      expect(localStorage.getItem(`${key}:submission:v1`)).toBeNull();
      expect(localStorage.getItem(`${key}:attachments:v1`)).toContain(attachmentId);
      expect(container.textContent).toContain("next-draft.txt");
      expect(container.textContent).not.toContain("We couldn’t confirm");
      await act(async () => root.unmount());
      await act(async () => resolveSend());
      expect(localStorage.getItem(key)).toBe("Newer unsent draft");
    },
  );

  it("keeps a reassigned legacy comment pending until its actual mutation promise settles", async () => {
    let resolveSend!: () => void;
    const onAdd = vi.fn().mockReturnValue(
      new Promise<void>((resolve) => {
        resolveSend = resolve;
      }),
    );
    const root = createRoot(container);
    await act(async () =>
      renderIssueThread(root, {
        onAdd: onAdd,
        draftKey: "legacy-awaited-reassignment",
        enableReassign: true,
        reassignOptions: [
          { id: "user:board", label: "Board" },
          { id: "user:reviewer", label: "Reviewer" },
        ],
        currentAssigneeValue: "user:board",
        suggestedAssigneeValue: "user:reviewer",
      }),
    );
    const editor = container.querySelector<HTMLTextAreaElement>(
      'textarea[aria-label="Issue chat editor"]',
    )!;
    act(() => {
      Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )!.set!.call(editor, "Please review the result");
      editor.dispatchEvent(new Event("input", { bubbles: true }));
    });
    await act(async () =>
      Array.from(container.querySelectorAll("button"))
        .find((button) => button.textContent === "Send")!
        .click(),
    );
    expect(onAdd).toHaveBeenCalledWith("Please review the result", undefined, {
      assigneeAgentId: null,
      assigneeUserId: "reviewer",
    }, undefined, expect.any(String));
    expect(appendMock).not.toHaveBeenCalled();
    expect(container.textContent).toContain("Posting...");
    expect(localStorage.getItem("legacy-awaited-reassignment")).toBe(
      "Please review the result",
    );
    expect(
      localStorage.getItem("legacy-awaited-reassignment:submission:v1"),
    ).toContain('"reviewed":false');
    await act(async () => resolveSend());
    expect(localStorage.getItem("legacy-awaited-reassignment")).toBeNull();
    expect(
      localStorage.getItem("legacy-awaited-reassignment:submission:v1"),
    ).toBeNull();
    await act(async () => root.unmount());
  });
  it("shows only the outer composer drop overlay when dragging over the reply editor", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        imageUploadHandler: async () => "/api/attachments/image/content",
        onAttachImage: async () => undefined,
      });
    });

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    expect(composer).not.toBeNull();
    expect(editor).not.toBeNull();

    act(() => {
      editor?.dispatchEvent(
        createFileDragEvent("dragenter", [
          new File(["hello"], "notes.txt", { type: "text/plain" }),
        ]),
      );
    });

    expect(
      container.querySelector(
        '[data-testid="issue-chat-composer-drop-overlay"]',
      ),
    ).not.toBeNull();
    expect(container.textContent).toContain("Drop to upload");
    expect(container.textContent).not.toContain("Drop image to upload");
    expect(composer?.className).toContain("border-primary/45");

    const fileInput = container.querySelector(
      'input[type="file"]',
    ) as HTMLInputElement | null;
    expect(fileInput?.getAttribute("accept")).toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("shows non-image attachment upload state in the composer after a drop from the editor", async () => {
    const root = createRoot(container);
    const onAttachImage = vi.fn(async (file: File) => ({
      id: "attachment-1",
      companyId: "company-1",
      issueId: "issue-1",
      issueCommentId: null,
      assetId: "asset-1",
      provider: "local_disk",
      objectKey: "issues/issue-1/report.pdf",
      contentPath: "/api/attachments/attachment-1/content",
      originalFilename: file.name,
      contentType: file.type,
      byteSize: file.size,
      sha256: "abc123",
      createdByAgentId: null,
      createdByUserId: "user-1",
      createdAt: new Date("2026-04-24T12:00:00.000Z"),
      updatedAt: new Date("2026-04-24T12:00:00.000Z"),
    }));

    await act(async () => {
      renderIssueThread(root, {
        onAttachImage: onAttachImage,
      });
    });

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    const file = new File(["report body"], "report.pdf", {
      type: "application/pdf",
    });

    await act(async () => {
      editor?.dispatchEvent(createFileDragEvent("drop", [file]));
    });

    expect(onAttachImage).toHaveBeenCalledWith(file);
    const attachmentList = container.querySelector(
      '[data-testid="issue-chat-composer-attachments"]',
    );
    expect(attachmentList).not.toBeNull();
    expect(attachmentList?.className).toContain("mb-3");
    expect(container.textContent).toContain("report.pdf");
    expect(container.textContent).toContain("Attached to task");

    await act(async () => {
      root.unmount();
    });
  });

  it("renders the bottom spacer with zero height until the user has submitted", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        comments: [
          {
            id: "comment-spacer-1",
            companyId: "company-1",
            issueId: "issue-1",
            authorAgentId: null,
            authorUserId: "user-1",
            body: "hello",
            authorType: "user",
            presentation: null,
            metadata: null,
            createdAt: new Date("2026-04-22T12:00:00.000Z"),
            updatedAt: new Date("2026-04-22T12:00:00.000Z"),
          },
        ],
      });
    });

    const spacer = container.querySelector(
      '[data-testid="issue-chat-bottom-spacer"]',
    ) as HTMLDivElement | null;
    expect(spacer).not.toBeNull();
    expect(spacer?.style.height).toBe("0px");

    act(() => {
      root.unmount();
    });
  });

  it("omits the bottom spacer when the composer is hidden", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        showComposer: false,
      });
    });

    const spacer = container.querySelector(
      '[data-testid="issue-chat-bottom-spacer"]',
    );
    expect(spacer).toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("hides the reopen control and infers reopen for closed agent-assigned issue replies", async () => {
    const root = createRoot(container);
    const onAdd = vi.fn().mockResolvedValue(undefined);

    act(() => {
      renderIssueThread(root, {
        issueStatus: "done",
        currentAssigneeValue: "agent:agent-1",
        onAdd: onAdd,
      });
    });

    expect(container.textContent).not.toContain("Re-open");

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    const submitButton = Array.from(container.querySelectorAll("button")).find(
      (element) => element.textContent === "Send",
    ) as HTMLButtonElement | undefined;
    expect(editor).not.toBeNull();
    expect(submitButton).toBeDefined();

    act(() => {
      const valueSetter = Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )?.set;
      valueSetter?.call(editor, "Please pick this back up");
      editor?.dispatchEvent(new Event("input", { bubbles: true }));
    });

    await act(async () => {
      submitButton?.click();
    });

    expect(onAdd).toHaveBeenCalledWith("Please pick this back up", true, undefined, undefined, expect.any(String));

    act(() => {
      root.unmount();
    });
  });

  it("opens a warning dialog before sending a reply with no assignee selected and posts on Send anyway", async () => {
    const root = createRoot(container);
    const onAdd = vi.fn().mockResolvedValue(undefined);

    act(() => {
      renderIssueThread(root, {
        onAdd: onAdd,
        enableReassign: true,
        reassignOptions: [
          { id: "", label: "No responsible" },
          { id: "agent:agent-1", label: "Agent 1" },
        ],
        currentAssigneeValue: "",
        suggestedAssigneeValue: "",
      });
    });

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    const submitButton = Array.from(container.querySelectorAll("button")).find(
      (element) => element.textContent === "Send",
    ) as HTMLButtonElement | undefined;
    expect(editor).not.toBeNull();
    expect(submitButton).toBeDefined();

    act(() => {
      const valueSetter = Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )?.set;
      valueSetter?.call(editor, "Reply without assignee");
      editor?.dispatchEvent(new Event("input", { bubbles: true }));
    });

    await act(async () => {
      submitButton?.click();
    });

    expect(onAdd).not.toHaveBeenCalled();
    const dialog = document.querySelector(
      '[data-testid="issue-chat-no-assignee-dialog"]',
    );
    expect(dialog).not.toBeNull();
    expect(dialog?.textContent).toContain("No responsible selected");
    expect(dialog?.textContent).toContain("no agent will be woken");

    const sendAnyway = document.querySelector(
      '[data-testid="issue-chat-no-assignee-send-anyway"]',
    ) as HTMLButtonElement | null;
    expect(sendAnyway).not.toBeNull();

    await act(async () => {
      sendAnyway?.click();
    });

    expect(onAdd).toHaveBeenCalledTimes(1);
    expect(onAdd).toHaveBeenCalledWith("Reply without assignee", undefined, undefined, undefined, expect.any(String));
    expect(
      document.querySelector('[data-testid="issue-chat-no-assignee-dialog"]'),
    ).toBeNull();

    act(() => {
      root.unmount();
    });
  });

  it("does not post when choosing Go back in the no-assignee warning dialog", async () => {
    const root = createRoot(container);
    const onAdd = vi.fn().mockResolvedValue(undefined);

    act(() => {
      renderIssueThread(root, {
        onAdd: onAdd,
        enableReassign: true,
        reassignOptions: [
          { id: "", label: "No responsible" },
          { id: "agent:agent-1", label: "Agent 1" },
        ],
        currentAssigneeValue: "",
        suggestedAssigneeValue: "",
      });
    });

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    const submitButton = Array.from(container.querySelectorAll("button")).find(
      (element) => element.textContent === "Send",
    ) as HTMLButtonElement | undefined;

    act(() => {
      const valueSetter = Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )?.set;
      valueSetter?.call(editor, "Reply without assignee");
      editor?.dispatchEvent(new Event("input", { bubbles: true }));
    });

    await act(async () => {
      submitButton?.click();
    });

    expect(
      document.querySelector('[data-testid="issue-chat-no-assignee-dialog"]'),
    ).not.toBeNull();

    const goBack = document.querySelector(
      '[data-testid="issue-chat-no-assignee-go-back"]',
    ) as HTMLButtonElement | null;
    expect(goBack).not.toBeNull();

    await act(async () => {
      goBack?.click();
    });

    expect(onAdd).not.toHaveBeenCalled();
    expect(
      document.querySelector('[data-testid="issue-chat-no-assignee-dialog"]'),
    ).toBeNull();
    // The composer keeps the draft so the user can pick a responsible and resend.
    const editorAfter = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    expect(editorAfter?.value).toBe("Reply without assignee");

    act(() => {
      root.unmount();
    });
  });

  it("does not warn when sending a reply with an assignee selected", async () => {
    const root = createRoot(container);
    const onAdd = vi.fn().mockResolvedValue(undefined);

    act(() => {
      renderIssueThread(root, {
        onAdd: onAdd,
        enableReassign: true,
        reassignOptions: [
          { id: "", label: "No responsible" },
          { id: "agent:agent-1", label: "Agent 1" },
        ],
        currentAssigneeValue: "agent:agent-1",
        suggestedAssigneeValue: "agent:agent-1",
      });
    });

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    const submitButton = Array.from(container.querySelectorAll("button")).find(
      (element) => element.textContent === "Send",
    ) as HTMLButtonElement | undefined;

    act(() => {
      const valueSetter = Object.getOwnPropertyDescriptor(
        window.HTMLTextAreaElement.prototype,
        "value",
      )?.set;
      valueSetter?.call(editor, "Reply with assignee");
      editor?.dispatchEvent(new Event("input", { bubbles: true }));
    });

    await act(async () => {
      submitButton?.click();
    });

    expect(onAdd).toHaveBeenCalledTimes(1);
    expect(document.body.textContent).not.toContain("No responsible selected");

    act(() => {
      root.unmount();
    });
  });

  it("exposes a composer focus handle that forwards to the editor", () => {
    const root = createRoot(container);
    const composerRef = createRef<{
      focus: () => void;
      restoreDraft: (submittedBody: string) => void;
    }>();
    const scrollByMock = vi
      .spyOn(window, "scrollBy")
      .mockImplementation(() => {});
    const requestAnimationFrameMock = vi
      .spyOn(window, "requestAnimationFrame")
      .mockImplementation((callback: FrameRequestCallback) => {
        callback(0);
        return 1;
      });

    act(() => {
      renderIssueThread(root, {
        composerRef: composerRef,
      });
    });

    const composer = container.querySelector(
      '[data-testid="issue-chat-composer"]',
    ) as HTMLDivElement | null;
    expect(composerRef.current).not.toBeNull();
    expect(composer).not.toBeNull();

    const scrollIntoViewMock = vi.fn();
    composer!.scrollIntoView = scrollIntoViewMock;

    act(() => {
      composerRef.current?.focus();
    });

    expect(scrollIntoViewMock).toHaveBeenCalledWith({
      behavior: "smooth",
      block: "end",
    });
    expect(scrollByMock).toHaveBeenCalledWith({ top: 96, behavior: "smooth" });
    expect(markdownEditorFocusMock).toHaveBeenCalledTimes(1);
    scrollByMock.mockRestore();
    requestAnimationFrameMock.mockRestore();

    act(() => {
      root.unmount();
    });
  });

  it("restores a cancelled queued draft into the composer handle", () => {
    const root = createRoot(container);
    const composerRef = createRef<{
      focus: () => void;
      restoreDraft: (submittedBody: string) => void;
    }>();
    const scrollByMock = vi
      .spyOn(window, "scrollBy")
      .mockImplementation(() => {});
    const requestAnimationFrameMock = vi
      .spyOn(window, "requestAnimationFrame")
      .mockImplementation((callback: FrameRequestCallback) => {
        callback(0);
        return 1;
      });

    act(() => {
      renderIssueThread(root, {
        composerRef: composerRef,
      });
    });

    const editor = container.querySelector(
      'textarea[aria-label="Issue chat editor"]',
    ) as HTMLTextAreaElement | null;
    expect(editor).not.toBeNull();

    act(() => {
      composerRef.current?.restoreDraft("Queued message");
    });

    expect(editor?.value).toBe("Queued message");
    expect(markdownEditorFocusMock).toHaveBeenCalledTimes(1);
    expect(scrollByMock).toHaveBeenCalledWith({ top: 96, behavior: "smooth" });

    scrollByMock.mockRestore();
    requestAnimationFrameMock.mockRestore();
    act(() => {
      root.unmount();
    });
  });

  it("does not restore the composer viewport for passive live updates by default", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root);
    });

    act(() => {
      renderIssueThread(root, {
        liveRuns: [
          {
            id: "run-1",
            issueId: "issue-1",
            status: "running",
            invocationSource: "comment",
            triggerDetail: null,
            startedAt: "2026-04-06T12:00:00.000Z",
            finishedAt: null,
            createdAt: "2026-04-06T12:00:00.000Z",
            agentId: "agent-1",
            agentName: "Agent 1",
            adapterType: "codex_local",
          },
        ],
      });
    });

    expect(restoreComposerViewportSnapshotMock).not.toHaveBeenCalled();

    act(() => {
      root.unmount();
    });
  });

  it("requests composer viewport restoration when live messages arrive during active composer interaction", () => {
    const root = createRoot(container);
    const scrollByMock = vi
      .spyOn(window, "scrollBy")
      .mockImplementation(() => {});
    shouldPreserveComposerViewportMock.mockReturnValue(true);
    captureComposerViewportSnapshotMock.mockReturnValue({
      composerViewportTop: 420,
    });

    act(() => {
      renderIssueThread(root);
    });

    act(() => {
      renderIssueThread(root, {
        liveRuns: [
          {
            id: "run-1",
            issueId: "issue-1",
            status: "running",
            invocationSource: "comment",
            triggerDetail: null,
            startedAt: "2026-04-06T12:00:00.000Z",
            finishedAt: null,
            createdAt: "2026-04-06T12:00:00.000Z",
            agentId: "agent-1",
            agentName: "Agent 1",
            adapterType: "codex_local",
          },
        ],
      });
    });

    expect(restoreComposerViewportSnapshotMock).toHaveBeenCalled();

    scrollByMock.mockRestore();
    act(() => {
      root.unmount();
    });
  });

  it("keeps a running chain-of-thought in the Working state between commands", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        liveRuns: [
          {
            id: "run-1",
            issueId: "issue-1",
            status: "running",
            invocationSource: "comment",
            triggerDetail: null,
            startedAt: "2026-04-06T12:00:00.000Z",
            finishedAt: null,
            createdAt: "2026-04-06T12:00:00.000Z",
            agentId: "agent-1",
            agentName: "Agent 1",
            adapterType: "codex_local",
          },
        ],
        transcriptsByRunId: new Map([
            [
              "run-1",
              [
                {
                  kind: "tool_call",
                  ts: "2026-04-06T12:00:10.000Z",
                  name: "command_execution",
                  toolUseId: "tool-1",
                  input: { command: "pnpm test" },
                },
                {
                  kind: "tool_result",
                  ts: "2026-04-06T12:00:20.000Z",
                  toolUseId: "tool-1",
                  toolName: "command_execution",
                  content: "Tests passed",
                  isError: false,
                },
              ],
            ],
          ]),
      });
    });

    expect(container.textContent).toContain("Working");
    expect(container.textContent).not.toContain("Worked");

    act(() => {
      root.unmount();
    });
  });

  it("renders ephemeral active-run status below the working indicator", () => {
    const root = createRoot(container);

    act(() => {
      renderIssueThread(root, {
        activeRun: {
          id: "run-1",
          issueId: "issue-1",
          status: "running",
          invocationSource: "comment",
          triggerDetail: null,
          startedAt: "2026-04-06T12:00:00.000Z",
          finishedAt: null,
          createdAt: "2026-04-06T12:00:00.000Z",
          agentId: "agent-1",
          agentName: "Agent 1",
          adapterType: "codex_local",
          currentStatusMessage: "Syncing git worktree to environment",
          currentStatusUpdatedAt: "2026-04-06T12:00:05.000Z",
          currentToolName: "bash",
          lastEventAt: new Date(Date.now() - 2000).toISOString(),
        },
      });
    });

    expect(container.textContent).toContain("Working...");
    expect(container.textContent).toContain("Using bash");
    expect(container.textContent).not.toContain("last activity");
    expect(container.textContent).toMatch(/\d+ seconds? ago/);

    act(() => {
      root.unmount();
    });
  });

  it("keeps the completed chain-of-thought caret beside its label and reveals it on hover or focus", () => {
    const root = createRoot(container);
    const run = issueChatLongThreadLinkedRuns[2];

    act(() => {
      renderIssueThread(root, {
        linkedRuns: [run],
        showComposer: false,
        transcriptsByRunId: issueChatLongThreadTranscriptsByRunId,
        hasOutputForRun: () => true,
      });
    });

    const header = Array.from(container.querySelectorAll("button")).find((button) =>
      button.textContent?.includes("worked for 4 minutes"),
    );
    expect(header).toBeDefined();
    const label = Array.from(header!.children).find((child) =>
      child.textContent?.includes("worked for 4 minutes"),
    );
    const caret = label?.nextElementSibling;
    expect(caret?.tagName.toLowerCase()).toBe("svg");
    expect(header?.classList.contains("group")).toBe(true);
    expect(caret?.classList.contains("opacity-0")).toBe(true);
    expect(caret?.classList.contains("group-hover:opacity-100")).toBe(true);
    expect(caret?.classList.contains("group-focus-visible:opacity-100")).toBe(true);
    expect(caret?.nextElementSibling?.classList.contains("ml-auto")).toBe(true);

    act(() => {
      header!.click();
    });
    expect(caret?.classList.contains("rotate-180")).toBe(true);

    act(() => {
      root.unmount();
    });
  });

  it("folds chain-of-thought when the same message transitions from running to complete", () => {
    expect(
      resolveAssistantMessageFoldedState({
        messageId: "message-1",
        currentFolded: false,
        isFoldable: true,
        previousMessageId: "message-1",
        previousIsFoldable: false,
      }),
    ).toBe(true);
  });

  it("preserves a manually opened completed message across rerenders", () => {
    expect(
      resolveAssistantMessageFoldedState({
        messageId: "message-1",
        currentFolded: false,
        isFoldable: true,
        previousMessageId: "message-1",
        previousIsFoldable: true,
      }),
    ).toBe(false);
  });

  it("shows the stop-run action for active run-linked messages even without embedded run status", () => {
    expect(
      canStopIssueChatRun({
        runId: "run-1",
        runStatus: null,
        activeRunIds: new Set(["run-1"]),
      }),
    ).toBe(true);
  });

  it("hides the stop-run action for completed historical runs", () => {
    expect(
      canStopIssueChatRun({
        runId: "run-1",
        runStatus: "cancelled",
        activeRunIds: new Set<string>(),
      }),
    ).toBe(false);
  });

  it("uses company profile data to distinguish the current user from other humans", () => {
    const userProfileMap = new Map([
      ["user-1", { label: "Dotta", image: "/avatars/dotta.png" }],
      ["user-2", { label: "Alice", image: "/avatars/alice.png" }],
    ]);

    expect(
      resolveIssueChatHumanAuthor({
        authorName: "You",
        authorUserId: "user-1",
        currentUserId: "user-1",
        userProfileMap,
      }),
    ).toEqual({
      isCurrentUser: true,
      authorName: "Dotta",
      avatarUrl: "/avatars/dotta.png",
    });

    expect(
      resolveIssueChatHumanAuthor({
        authorName: "Alice",
        authorUserId: "user-2",
        currentUserId: "user-1",
        userProfileMap,
      }),
    ).toEqual({
      isCurrentUser: false,
      authorName: "Alice",
      avatarUrl: "/avatars/alice.png",
    });
  });
});

describe("IssueAssigneePausedNotice", () => {
  let container: HTMLDivElement;

  beforeEach(() => {
    container = document.createElement("div");
    document.body.appendChild(container);
  });

  afterEach(() => {
    container.remove();
  });

  function pausedAgent(pauseReason: string): Agent {
    return {
      id: "agent-1",
      name: "CEO",
      status: "paused",
      pauseReason,
    } as unknown as Agent;
  }

  it("explains an import pause and resumes the agent on click", () => {
    const onResume = vi.fn();
    const root = createRoot(container);

    act(() => {
      root.render(
        <IssueAssigneePausedNotice
          agent={pausedAgent("import")}
          onResume={onResume}
          resuming={false}
        />,
      );
    });

    expect(container.textContent).toContain(
      "arrived paused from an organization import",
    );
    const resumeButton = container.querySelector(
      '[data-testid="issue-assignee-paused-resume"]',
    ) as HTMLButtonElement | null;
    expect(resumeButton).not.toBeNull();

    act(() => {
      resumeButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
    });
    expect(onResume).toHaveBeenCalledTimes(1);

    act(() => root.unmount());
  });

  it("offers no resume action for budget pauses", () => {
    const root = createRoot(container);

    act(() => {
      root.render(
        <IssueAssigneePausedNotice
          agent={pausedAgent("budget")}
          onResume={vi.fn()}
          resuming={false}
        />,
      );
    });

    expect(container.textContent).toContain("budget hard stop");
    expect(
      container.querySelector('[data-testid="issue-assignee-paused-resume"]'),
    ).toBeNull();

    act(() => root.unmount());
  });

  it("renders nothing for an active agent", () => {
    const root = createRoot(container);

    act(() => {
      root.render(
        <IssueAssigneePausedNotice
          agent={
            { id: "agent-1", name: "CEO", status: "idle" } as unknown as Agent
          }
        />,
      );
    });

    expect(
      container.querySelector('[data-testid="issue-assignee-paused-notice"]'),
    ).toBeNull();

    act(() => root.unmount());
  });
});