import { type ReactNode, useCallback, useEffect, useMemo, useRef, useState } from "react";
import { Link, useLocation, useNavigate } from "@/lib/router";
import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
import { deriveOriginatingActor, INBOX_MINE_ISSUE_STATUS_FILTER, isHeartbeatRunVisibleInMine } from "@paperclipai/shared";
import { usePublishSharedQueryData, useSharedPollingQuery } from "@/hooks/useSharedPolling";
import { approvalsApi } from "../api/approvals";
import { accessApi } from "../api/access";
import { authApi } from "../api/auth";
import { ApiError } from "../api/client";
import { dashboardApi } from "../api/dashboard";
import { executionWorkspacesApi } from "../api/execution-workspaces";
import { issuesApi } from "../api/issues";
import { agentsApi } from "../api/agents";
import { heartbeatsApi } from "../api/heartbeats";
import { instanceSettingsApi } from "../api/instanceSettings";
import { projectsApi } from "../api/projects";
import {
  BLOCKED_GROUP_OPTIONS,
  BLOCKED_SORT_OPTIONS,
  type BlockedInboxGroupBy,
  type BlockedInboxSort,
} from "../lib/blockedInbox";
import { useCompany } from "../context/CompanyContext";
import { useToastActions } from "../context/ToastContext";
import { useBreadcrumbs } from "../context/BreadcrumbContext";
import { useSidebar } from "../context/SidebarContext";
import { queryKeys } from "../lib/queryKeys";
import { useDialogActions } from "../context/DialogContext";
import { useIssueExternalObjectSummaries } from "../hooks/useIssueExternalObjects";
import {
  applyIssueFilters,
  countActiveIssueFilters,
  defaultIssueFilterState,
  normalizeIssueFilterState,
  type IssueFilterState,
} from "../lib/issue-filters";
import { collectLiveIssueIds, collectSubtreeLiveCounts } from "../lib/liveIssueIds";
import { formatAssigneeUserLabel } from "../lib/assignees";
import { buildCompanyUserLabelMap, buildCompanyUserProfileMap } from "../lib/company-members";
import {
  armIssueDetailInboxQuickArchive,
  createIssueDetailLocationState,
  createIssueDetailPath,
  rememberIssueDetailLocationState,
  withIssueDetailHeaderSeed,
} from "../lib/issueDetailBreadcrumb";
import { prefetchIssueDetailForNavigation } from "../lib/issueDetailCache";
import {
  hasBlockingShortcutDialog,
  isKeyboardShortcutTextInputTarget,
  resolveInboxUndoArchiveKeyAction,
  shouldBlurPageSearchOnEnter,
  shouldBlurPageSearchOnEscape,
} from "../lib/keyboardShortcuts";
import {
  resolveInboxIssueBlockerAttention,
  resolveIssueLiveDescendantCount,
} from "../lib/inbox-live-descendants";
import {
  beginLocalInboxArchive,
  boundLocalInboxArchive,
  cancelInboxIssueQueries,
  clearLocalInboxArchive,
  confirmLocalInboxArchive,
  invalidateInboxIssueQueries,
  getIssuePresenceInActiveInboxCaches,
  removeIssueFromInboxCaches,
  restoreIssueToInboxCaches,
  snapshotInboxIssueCaches,
  type InboxIssueCacheSnapshot,
  useLocalInboxArchiveIssueIds,
} from "../lib/inboxArchiveCache";
import { EmptyState } from "../components/EmptyState";
import { CollectionToolbar, type CollectionToolbarProps } from "../components/CollectionToolbar";
import { IssueGroupHeader } from "../components/IssueGroupHeader";
import { PageSkeleton } from "../components/PageSkeleton";
import {
  InboxIssueMetaLeading,
  InboxIssueTrailingColumns,
  IssueColumnPicker,
  issueActivityText,
  issueActivityTimestamp,
  issueTrailingColumns,
} from "../components/IssueColumns";
import { IssueFiltersPopover } from "../components/IssueFiltersPopover";
import { InboxArchiveButton, IssueRow } from "../components/IssueRow";
import { BlockedInboxView } from "../components/BlockedInboxView";
import { SwipeToArchive } from "../components/SwipeToArchive";
import { useStreamlinedUiEnabled } from "../hooks/useStreamlinedUiEnabled";
import { Inbox as LegacyInbox } from "./LegacyInbox";

import { StatusIcon } from "../components/StatusIcon";
import { cn } from "../lib/utils";
import { StatusBadge } from "../components/StatusBadge";
import { approvalLabel, defaultTypeIcon, typeIcon } from "../components/ApprovalPayload";
import { timeAgo } from "../lib/timeAgo";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Separator } from "@/components/ui/separator";
import { Tabs } from "@/components/ui/tabs";
import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
import {
  Inbox as InboxIcon,
  AlertTriangle,
  Check,
  ChevronRight,
  ArrowUpDown,
  Layers,
  Plus,
  XCircle,
  X,
  RotateCcw,
  UserPlus,
  Search,
  ListTree,
} from "lucide-react";
import { Input } from "@/components/ui/input";
import { PageTabBar } from "../components/PageTabBar";
import type { Approval, HeartbeatRun, Issue, JoinRequest } from "@paperclipai/shared";
import {
  ACTIONABLE_APPROVAL_STATUSES,
  DEFAULT_INBOX_ISSUE_COLUMNS,
  buildGroupedInboxSections,
  buildInboxIssueGroupCreateDefaults,
  buildInboxKeyboardNavEntries,
  getAvailableInboxIssueColumns,
  getInboxWorkItemKey,
  getApprovalsForTab,
  getArchivedInboxSearchIssues,
  getInboxKeyboardSelectionIndex,
  getInboxWorkItems,
  getInboxSearchSupplementIssues,
  getLatestFailedRunsByAgent,
  matchesInboxIssueSearch,
  getRecentTouchedIssues,
  isInboxEntityDismissed,
  isMineInboxTab,
  loadCollapsedInboxGroupKeys,
  loadCollapsedInboxParentIds,
  loadInboxNesting,
  loadInboxWorkItemGroupBy,
  normalizeInboxIssueColumns,
  resolveInboxNestingEnabled,
  shouldResetInboxWorkspaceGrouping,
  resolveIssueWorkspaceName,
  resolveInboxSelectionIndex,
  saveCollapsedInboxGroupKeys,
  saveCollapsedInboxParentIds,
  saveInboxNesting,
  saveInboxWorkItemGroupBy,
  type InboxWorkspaceGroupingOptions,
  type InboxApprovalFilter,
  type InboxCategoryFilter,
  type InboxFilterPreferences,
  type InboxIssueColumn,
  type InboxKeyboardNavEntry,
  saveLastInboxTab,
  shouldShowCompanyAlerts,
  shouldShowInboxSection,
  type InboxGroupedSection,
  type InboxTab,
  type InboxWorkItem,
  type InboxWorkItemGroupBy,
  INBOX_FILTER_PREFERENCES_KEY_PREFIX,
  INBOX_ISSUE_COLUMNS_KEY,
} from "../lib/inbox";
import { useDismissedInboxAlerts, useInboxDismissals, useReadInboxItems } from "../hooks/useInboxBadge";
import { useInboxSortAttention } from "../hooks/useInboxSortAttention";
import {
  captureInboxOrderPin,
  reconcileInboxOrderPin,
  type InboxOrderPin,
} from "../lib/inboxOrderPin";
import {
  loadTaskCollectionPreferences,
  saveTaskCollectionPreferences,
  type TaskCollectionPreferenceLocation,
} from "../lib/task-collection-preferences";
import {
  taskDateGroup,
  taskDateGroupSeparator,
  type TaskDateGroup,
} from "../lib/task-date-groups";

const INBOX_HEARTBEAT_RUN_LIMIT = 200;
const INBOX_ISSUE_LIST_LIMIT = 500;
const INBOX_HOT_PATH_STALE_MS = 30_000;
const INBOX_COLLECTION_KEY = "inbox";

type StreamlinedInboxViewState = InboxFilterPreferences & {
  showDateGroupSeparators: boolean;
};

const DEFAULT_INBOX_FILTER_PREFERENCES: StreamlinedInboxViewState = {
  allCategoryFilter: "everything",
  allApprovalFilter: "all",
  issueFilters: { ...defaultIssueFilterState },
  showDateGroupSeparators: true,
};

function normalizeInboxCollectionViewState(value: unknown): StreamlinedInboxViewState {
  const candidate = value && typeof value === "object"
    ? value as Partial<StreamlinedInboxViewState>
    : {};
  const category = candidate.allCategoryFilter;
  const approval = candidate.allApprovalFilter;
  return {
    allCategoryFilter:
      category === "issues_i_touched"
      || category === "join_requests"
      || category === "approvals"
      || category === "failed_runs"
      || category === "alerts"
        ? category
        : "everything",
    allApprovalFilter: approval === "actionable" || approval === "resolved" ? approval : "all",
    issueFilters: {
      ...normalizeIssueFilterState(candidate.issueFilters),
      // The filter menu no longer offers Workspace. Drop a saved selection so
      // it cannot keep hiding tasks. A task-link workspace query is applied
      // by the task list after this load.
      workspaces: [],
    },
    showDateGroupSeparators: candidate.showDateGroupSeparators !== false,
  };
}

function inboxCollectionPreferenceLocation(
  companyId: string | null | undefined,
): TaskCollectionPreferenceLocation {
  return {
    companyId: companyId ?? "__unscoped__",
    collectionKey: INBOX_COLLECTION_KEY,
    legacyViewStorageKey: companyId
      ? `${INBOX_FILTER_PREFERENCES_KEY_PREFIX}:${companyId}`
      : undefined,
    legacyColumnsStorageKey: INBOX_ISSUE_COLUMNS_KEY,
  };
}

function loadInboxCollectionPreferences(companyId: string | null | undefined) {
  return loadTaskCollectionPreferences({
    ...inboxCollectionPreferenceLocation(companyId),
    defaultViewState: DEFAULT_INBOX_FILTER_PREFERENCES,
    defaultColumns: DEFAULT_INBOX_ISSUE_COLUMNS,
    normalizeViewState: normalizeInboxCollectionViewState,
    normalizeColumns: (value) => Array.isArray(value)
      ? normalizeInboxIssueColumns(value)
      : DEFAULT_INBOX_ISSUE_COLUMNS,
  });
}

export { InboxIssueMetaLeading, InboxIssueTrailingColumns } from "../components/IssueColumns";
export { IssueGroupHeader as InboxGroupHeader } from "../components/IssueGroupHeader";
type SectionKey =
  | "work_items"
  | "alerts";

/** A flat navigation entry for keyboard j/k traversal that includes expanded children. */
type NavEntry = InboxKeyboardNavEntry;
// Stable identity for a nav row, resilient to the numeric index shifting when
// the inbox reshapes (archive/poll). Used to re-anchor both the keyboard
// selection and the hovered row across list refreshes.
const navEntryKey = (entry: NavEntry | undefined): string | null =>
  !entry
    ? null
    : entry.type === "top"
      ? `top:${entry.itemKey}`
      : entry.type === "child"
        ? `child:${entry.issueId}`
        : `group:${entry.groupKey}`;
type CreatorOption = {
  id: string;
  label: string;
  kind: "agent" | "user";
  searchText?: string;
};

function firstNonEmptyLine(value: string | null | undefined): string | null {
  if (!value) return null;
  const line = value.split("\n").map((chunk) => chunk.trim()).find(Boolean);
  return line ?? null;
}

function runFailureMessage(run: HeartbeatRun): string {
  return firstNonEmptyLine(run.error) ?? firstNonEmptyLine(run.stderrExcerpt) ?? "Run exited with an error.";
}

function approvalStatusLabel(status: Approval["status"]): string {
  return status.replaceAll("_", " ");
}

function readIssueIdFromRun(run: HeartbeatRun): string | null {
  const context = run.contextSnapshot;
  if (!context) return null;

  const issueId = context["issueId"];
  if (typeof issueId === "string" && issueId.length > 0) return issueId;

  const taskId = context["taskId"];
  if (typeof taskId === "string" && taskId.length > 0) return taskId;

  return null;
}

function nonEmptyLabel(value: string | null | undefined): string | null {
  const trimmed = value?.trim();
  return trimmed ? trimmed : null;
}

export function formatJoinRequestInboxLabel(
  joinRequest: Pick<
    JoinRequest,
    "requestType" | "agentName" | "requestEmailSnapshot" | "requestingUserId"
  > & {
    requesterUser?: {
      name: string | null;
      email: string | null;
    } | null;
  },
) {
  if (joinRequest.requestType !== "human") {
    return `Agent join request${joinRequest.agentName ? `: ${joinRequest.agentName}` : ""}`;
  }

  const requesterName = nonEmptyLabel(joinRequest.requesterUser?.name);
  const requesterEmail =
    nonEmptyLabel(joinRequest.requesterUser?.email) ??
    nonEmptyLabel(joinRequest.requestEmailSnapshot);
  const requesterId = nonEmptyLabel(joinRequest.requestingUserId);

  if (requesterName && requesterEmail) return `${requesterName} (${requesterEmail})`;
  if (requesterEmail) return requesterEmail;
  if (requesterName) return requesterName;
  if (requesterId) return requesterId;
  return "Human join request";
}


type NonIssueUnreadState = "visible" | "fading" | "hidden" | null;

// Rows outside SwipeToArchive (non-archivable tabs/sections) still need the
// hover-follows-selection band that SwipeToArchive's surface normally paints.
function InboxRowSurface({ selected, children }: { selected: boolean; children: ReactNode }) {
  return <div className={cn(selected && "rounded-lg bg-accent/50")}>{children}</div>;
}

export function FailedRunInboxRow({
  run,
  issueById,
  agentName: linkedAgentName,
  issueLinkState,
  onDismiss,
  onRetry,
  isRetrying,
  unreadState = null,
  onMarkRead,
  onArchive,
  archiveDisabled,
  selected = false,
  className,
}: {
  run: HeartbeatRun;
  issueById: Map<string, Issue>;
  agentName: string | null;
  issueLinkState: unknown;
  onDismiss: () => void;
  onRetry: () => void;
  isRetrying: boolean;
  unreadState?: NonIssueUnreadState;
  onMarkRead?: () => void;
  onArchive?: () => void;
  archiveDisabled?: boolean;
  selected?: boolean;
  className?: string;
}) {
  const issueId = readIssueIdFromRun(run);
  const issue = issueId ? issueById.get(issueId) ?? null : null;
  const displayError = runFailureMessage(run);
  const showUnreadSlot = unreadState !== null;
  const showUnreadDot = unreadState === "visible" || unreadState === "fading";

  return (
    <div className={cn(
      "group py-2.5 pl-4 pr-2 sm:py-2",
      className,
    )}>
      <div className="flex items-start gap-2 sm:items-center">
        {showUnreadSlot ? (
          <span className="hidden sm:inline-flex h-4 w-4 shrink-0 items-center justify-center self-center">
            {showUnreadDot ? (
              <button
                type="button"
                onClick={onMarkRead}
                className={cn(
                  "inline-flex h-4 w-4 items-center justify-center rounded-full transition-colors",
                  "hover:bg-blue-500/20",
                )}
                aria-label="Mark as read"
              >
                <span className={cn(
                  "block h-2 w-2 rounded-full transition-opacity duration-300",
                  "bg-blue-600 dark:bg-blue-400",
                  unreadState === "fading" ? "opacity-0" : "opacity-100",
                )} />
              </button>
            ) : (
              <span className="inline-flex h-4 w-4" aria-hidden="true" />
            )}
          </span>
        ) : null}
        <Link
          to={`/agents/${run.agentId}/runs/${run.id}`}
          className={cn(
            "flex min-w-0 flex-1 items-start gap-2 no-underline text-inherit transition-colors",
            selected ? "hover:bg-transparent" : "hover:bg-accent/50",
          )}
        >
          {!showUnreadSlot && <span className="hidden h-2 w-2 shrink-0 sm:inline-flex" aria-hidden="true" />}
          <span className="hidden h-3.5 w-3.5 shrink-0 sm:inline-flex" aria-hidden="true" />
          <span className="mt-0.5 shrink-0 rounded-md bg-red-500/20 p-1.5 sm:mt-0">
            <XCircle className="h-4 w-4 text-red-600 dark:text-red-400" />
          </span>
          <span className="min-w-0 flex-1">
            <span className="line-clamp-2 text-sm font-medium sm:truncate sm:line-clamp-none">
              {issue ? (
                <>
                  <span className="font-mono text-muted-foreground mr-1.5">
                    {issue.identifier ?? issue.id.slice(0, 8)}
                  </span>
                  {issue.title}
                </>
              ) : (
                <>Failed run{linkedAgentName ? ` — ${linkedAgentName}` : ""}</>
              )}
            </span>
            <span className="mt-1 flex flex-wrap items-center gap-x-2 gap-y-1 text-xs text-muted-foreground">
              <StatusBadge status={run.status} />
              {linkedAgentName && issue ? <span>{linkedAgentName}</span> : null}
              <span className="truncate max-w-(--sz-300px)">{displayError}</span>
              <span>{timeAgo(run.createdAt)}</span>
            </span>
          </span>
        </Link>
        <div className="hidden shrink-0 items-center gap-2 sm:flex">
          {onArchive ? (
            <InboxArchiveButton onArchive={onArchive} disabled={archiveDisabled} />
          ) : null}
          <Button
            type="button"
            variant="outline"
            size="sm"
            className="h-8 shrink-0 px-2.5"
            onClick={onRetry}
            disabled={isRetrying}
          >
            <RotateCcw className="mr-1.5 h-3.5 w-3.5" />
            {isRetrying ? "Retrying…" : "Retry"}
          </Button>
          {!showUnreadSlot && (
            <button
              type="button"
              onClick={onDismiss}
              className="rounded-md p-1 text-muted-foreground opacity-0 transition-opacity hover:bg-accent hover:text-foreground group-hover:opacity-100"
              aria-label="Dismiss"
            >
              <X className="h-4 w-4" />
            </button>
          )}
        </div>
      </div>
      <div className="mt-3 flex gap-2 sm:hidden">
        <Button
          type="button"
          variant="outline"
          size="sm"
          className="h-8 shrink-0 px-2.5"
          onClick={onRetry}
          disabled={isRetrying}
        >
          <RotateCcw className="mr-1.5 h-3.5 w-3.5" />
          {isRetrying ? "Retrying…" : "Retry"}
        </Button>
        {!showUnreadSlot && (
          <button
            type="button"
            onClick={onDismiss}
            className="rounded-md p-1 text-muted-foreground hover:bg-accent hover:text-foreground"
            aria-label="Dismiss"
          >
            <X className="h-4 w-4" />
          </button>
        )}
      </div>
    </div>
  );
}

function ApprovalInboxRow({
  approval,
  requesterName,
  onApprove,
  onReject,
  isPending,
  unreadState = null,
  onMarkRead,
  onArchive,
  archiveDisabled,
  selected = false,
  className,
}: {
  approval: Approval;
  requesterName: string | null;
  onApprove: () => void;
  onReject: () => void;
  isPending: boolean;
  unreadState?: NonIssueUnreadState;
  onMarkRead?: () => void;
  onArchive?: () => void;
  archiveDisabled?: boolean;
  selected?: boolean;
  className?: string;
}) {
  const Icon = typeIcon[approval.type] ?? defaultTypeIcon;
  const label = approvalLabel(approval.type, approval.payload as Record<string, unknown> | null);
  const showResolutionButtons =
    approval.type !== "budget_override_required" &&
    ACTIONABLE_APPROVAL_STATUSES.has(approval.status);
  const showUnreadSlot = unreadState !== null;
  const showUnreadDot = unreadState === "visible" || unreadState === "fading";

  return (
    <div className={cn(
      "group py-2.5 pl-4 pr-2 sm:py-2",
      className,
    )}>
      <div className="flex items-start gap-2 sm:items-center">
        {showUnreadSlot ? (
          <span className="hidden sm:inline-flex h-4 w-4 shrink-0 items-center justify-center self-center">
            {showUnreadDot ? (
              <button
                type="button"
                onClick={onMarkRead}
                className={cn(
                  "inline-flex h-4 w-4 items-center justify-center rounded-full transition-colors",
                  "hover:bg-blue-500/20",
                )}
                aria-label="Mark as read"
              >
                <span className={cn(
                  "block h-2 w-2 rounded-full transition-opacity duration-300",
                  "bg-blue-600 dark:bg-blue-400",
                  unreadState === "fading" ? "opacity-0" : "opacity-100",
                )} />
              </button>
            ) : (
              <span className="inline-flex h-4 w-4" aria-hidden="true" />
            )}
          </span>
        ) : null}
        <Link
          to={`/approvals/${approval.id}`}
          className={cn(
            "flex min-w-0 flex-1 items-start gap-2 no-underline text-inherit transition-colors",
            selected ? "hover:bg-transparent" : "hover:bg-accent/50",
          )}
        >
          {!showUnreadSlot && <span className="hidden h-2 w-2 shrink-0 sm:inline-flex" aria-hidden="true" />}
          <span className="hidden h-3.5 w-3.5 shrink-0 sm:inline-flex" aria-hidden="true" />
          <span className="mt-0.5 shrink-0 rounded-md bg-muted p-1.5 sm:mt-0">
            <Icon className="h-4 w-4 text-muted-foreground" />
          </span>
          <span className="min-w-0 flex-1">
            <span className="line-clamp-2 text-sm font-medium sm:truncate sm:line-clamp-none">
              {label}
            </span>
            <span className="mt-1 flex flex-wrap items-center gap-x-2 gap-y-1 text-xs text-muted-foreground">
              <span className="capitalize">{approvalStatusLabel(approval.status)}</span>
              {requesterName ? <span>requested by {requesterName}</span> : null}
              <span>updated {timeAgo(approval.updatedAt)}</span>
            </span>
          </span>
        </Link>
        {(onArchive || showResolutionButtons) ? (
          <div className="hidden shrink-0 items-center gap-2 sm:flex">
            {onArchive ? (
              <InboxArchiveButton onArchive={onArchive} disabled={archiveDisabled} />
            ) : null}
            {showResolutionButtons ? (
              <>
                <Button
                  size="sm"
                  className="h-8 min-w-(--sz-64px) justify-center bg-green-700 px-3 text-white hover:bg-green-600"
                  onClick={onApprove}
                  disabled={isPending}
                >
                  Approve
                </Button>
                <Button
                  variant="destructive"
                  size="sm"
                  className="h-8 min-w-(--sz-64px) justify-center px-3"
                  onClick={onReject}
                  disabled={isPending}
                >
                  Reject
                </Button>
              </>
            ) : null}
          </div>
        ) : null}
      </div>
      {showResolutionButtons ? (
        <div className="mt-3 flex gap-2 sm:hidden">
          <Button
            size="sm"
            className="h-8 min-w-(--sz-64px) justify-center bg-green-700 px-3 text-white hover:bg-green-600"
            onClick={onApprove}
            disabled={isPending}
          >
            Approve
          </Button>
          <Button
            variant="destructive"
            size="sm"
            className="h-8 min-w-(--sz-64px) justify-center px-3"
            onClick={onReject}
            disabled={isPending}
          >
            Reject
          </Button>
        </div>
      ) : null}
    </div>
  );
}

function JoinRequestInboxRow({
  joinRequest,
  onApprove,
  onReject,
  isPending,
  unreadState = null,
  onMarkRead,
  onArchive,
  archiveDisabled,
  selected = false,
  className,
}: {
  joinRequest: JoinRequest;
  onApprove: () => void;
  onReject: () => void;
  isPending: boolean;
  unreadState?: NonIssueUnreadState;
  onMarkRead?: () => void;
  onArchive?: () => void;
  archiveDisabled?: boolean;
  selected?: boolean;
  className?: string;
}) {
  const label = formatJoinRequestInboxLabel(joinRequest);
  const showUnreadSlot = unreadState !== null;
  const showUnreadDot = unreadState === "visible" || unreadState === "fading";

  return (
    <div className={cn(
      "group py-2.5 pl-4 pr-2 sm:py-2",
      className,
    )}>
      <div className="flex items-start gap-2 sm:items-center">
        {showUnreadSlot ? (
          <span className="hidden sm:inline-flex h-4 w-4 shrink-0 items-center justify-center self-center">
            {showUnreadDot ? (
              <button
                type="button"
                onClick={onMarkRead}
                className={cn(
                  "inline-flex h-4 w-4 items-center justify-center rounded-full transition-colors",
                  "hover:bg-blue-500/20",
                )}
                aria-label="Mark as read"
              >
                <span className={cn(
                  "block h-2 w-2 rounded-full transition-opacity duration-300",
                  "bg-blue-600 dark:bg-blue-400",
                  unreadState === "fading" ? "opacity-0" : "opacity-100",
                )} />
              </button>
            ) : (
              <span className="inline-flex h-4 w-4" aria-hidden="true" />
            )}
          </span>
        ) : null}
        <div className="flex min-w-0 flex-1 items-start gap-2">
          {!showUnreadSlot && <span className="hidden h-2 w-2 shrink-0 sm:inline-flex" aria-hidden="true" />}
          <span className="hidden h-3.5 w-3.5 shrink-0 sm:inline-flex" aria-hidden="true" />
          <span className="mt-0.5 shrink-0 rounded-md bg-muted p-1.5 sm:mt-0">
            <UserPlus className="h-4 w-4 text-muted-foreground" />
          </span>
          <span className="min-w-0 flex-1">
            <span className="line-clamp-2 text-sm font-medium sm:truncate sm:line-clamp-none">
              {label}
            </span>
            <span className="mt-1 flex flex-wrap items-center gap-x-2 gap-y-1 text-xs text-muted-foreground">
              <span>requested {timeAgo(joinRequest.createdAt)} from IP {joinRequest.requestIp}</span>
              {joinRequest.adapterType && <span>adapter: {joinRequest.adapterType}</span>}
            </span>
          </span>
        </div>
        <div className="hidden shrink-0 items-center gap-2 sm:flex">
          {onArchive ? (
            <InboxArchiveButton onArchive={onArchive} disabled={archiveDisabled} />
          ) : null}
          <Button
            size="sm"
            className="h-8 bg-green-700 px-3 text-white hover:bg-green-600"
            onClick={onApprove}
            disabled={isPending}
          >
            Approve
          </Button>
          <Button
            variant="destructive"
            size="sm"
            className="h-8 px-3"
            onClick={onReject}
            disabled={isPending}
          >
            Reject
          </Button>
        </div>
      </div>
      <div className="mt-3 flex gap-2 sm:hidden">
        <Button
          size="sm"
          className="h-8 bg-green-700 px-3 text-white hover:bg-green-600"
          onClick={onApprove}
          disabled={isPending}
        >
          Approve
        </Button>
        <Button
          variant="destructive"
          size="sm"
          className="h-8 px-3"
          onClick={onReject}
          disabled={isPending}
        >
          Reject
        </Button>
      </div>
    </div>
  );
}

function InboxCollectionToolbar({
  streamlined,
  context,
  search,
  controls,
  feedback,
  ariaLabel,
}: CollectionToolbarProps & { streamlined: boolean }) {
  if (streamlined) {
    return (
      <CollectionToolbar
        ariaLabel={ariaLabel}
        context={context}
        search={search}
        controls={controls}
        feedback={feedback}
      />
    );
  }

  return (
    <div role="toolbar" aria-label={ariaLabel} className="space-y-2">
      {search ? <div className="sm:hidden">{search}</div> : null}
      <div className="flex flex-wrap items-center justify-between gap-2">
        {context}
        <div className="flex items-center gap-2">
          {search ? <div className="hidden sm:block">{search}</div> : null}
          {controls}
        </div>
      </div>
      {feedback}
    </div>
  );
}

/**
 * PAP-670: the inbox stopped being its own page and became the "My work" half
 * of Tasks. `Tasks` hosts this component and drives it through these props, so
 * every inbox behaviour (unread state, archive, date groups, the mixed
 * approval / failed-run / join-request rows) survives the merge by construction
 * rather than being reimplemented on the task list.
 *
 * With no props it is still the standalone `/inbox/*` page, which the legacy
 * (non-streamlined) shell continues to use.
 */
export interface InboxSurfaceProps {
  /** Which view to render. Falls back to the last path segment when absent. */
  tab?: InboxTab;
  /** Replaces the inbox tab bar in the toolbar's context slot. */
  toolbarContext?: ReactNode;
  /** Breadcrumb and back-link label; "Inbox" when standalone, "Tasks" when hosted. */
  surfaceLabel?: string;
}

export function Inbox(props: InboxSurfaceProps = {}) {
  const { enabled: streamlinedUiEnabled } = useStreamlinedUiEnabled();
  return streamlinedUiEnabled ? <StreamlinedInbox {...props} /> : <LegacyInbox />;
}

function StreamlinedInbox({
  tab: tabOverride,
  toolbarContext,
  surfaceLabel = "Inbox",
}: InboxSurfaceProps) {
  const streamlinedUiEnabled = true;
  const { selectedCompanyId } = useCompany();
  const { setBreadcrumbs } = useBreadcrumbs();
  const { openNewIssue } = useDialogActions();
  const { isMobile } = useSidebar();
  const navigate = useNavigate();
  const { pushToast } = useToastActions();
  const location = useLocation();
  const queryClient = useQueryClient();
  const [actionError, setActionError] = useState<string | null>(null);
  const { data: experimentalSettings } = useQuery({
    queryKey: queryKeys.instance.experimentalSettings,
    queryFn: () => instanceSettingsApi.getExperimental(),
    retry: false,
  });
  const experimentalSettingsLoaded = experimentalSettings !== undefined;
  const [searchQuery, setSearchQuery] = useState("");
  const normalizedSearchQuery = searchQuery.trim();
  const [filterPreferences, setFilterPreferences] = useState<StreamlinedInboxViewState>(
    () => loadInboxCollectionPreferences(selectedCompanyId).viewState,
  );
  const [groupBy, setGroupBy] = useState<InboxWorkItemGroupBy>(() => loadInboxWorkItemGroupBy());
  const [blockedGroupBy, setBlockedGroupBy] = useState<BlockedInboxGroupBy>("none");
  const [blockedSortBy, setBlockedSortBy] = useState<BlockedInboxSort>("most_recent");
  const [visibleIssueColumns, setVisibleIssueColumns] = useState<InboxIssueColumn[]>(
    () => loadInboxCollectionPreferences(selectedCompanyId).columns,
  );
  const { dismissed: dismissedAlerts, dismiss: dismissAlert } = useDismissedInboxAlerts();
  const { dismissedAtByKey, dismiss: dismissInboxItem } = useInboxDismissals(selectedCompanyId);
  const { readItems, markRead: markItemRead, markUnread: markItemUnread } = useReadInboxItems();
  const { allCategoryFilter, allApprovalFilter, issueFilters } = filterPreferences;

  const pathSegment = location.pathname.split("/").pop() ?? "mine";
  const pathTab: InboxTab =
    pathSegment === "mine"
    || pathSegment === "recent"
    || pathSegment === "all"
    || pathSegment === "unread"
    || pathSegment === "blocked"
      ? pathSegment
      : "mine";
  const tab: InboxTab = tabOverride ?? pathTab;
  const canArchiveFromTab = isMineInboxTab(tab);
  const issueLinkState = useMemo(
    () =>
      createIssueDetailLocationState(
        surfaceLabel,
        `${location.pathname}${location.search}${location.hash}`,
        "inbox",
      ),
    [surfaceLabel, location.pathname, location.search, location.hash],
  );

  const { data: session } = useQuery({
    queryKey: queryKeys.auth.session,
    queryFn: () => authApi.getSession(),
  });

  const { data: agents } = useQuery({
    queryKey: queryKeys.agents.list(selectedCompanyId!),
    queryFn: () => agentsApi.list(selectedCompanyId!),
    enabled: !!selectedCompanyId,
  });

  const { data: projects } = useQuery({
    queryKey: queryKeys.projects.list(selectedCompanyId!, { includeArchived: true }),
    queryFn: () => projectsApi.list(selectedCompanyId!, { includeArchived: true }),
    enabled: !!selectedCompanyId,
  });
  const { data: labels } = useQuery({
    queryKey: queryKeys.issues.labels(selectedCompanyId!),
    queryFn: () => issuesApi.listLabels(selectedCompanyId!),
    enabled: !!selectedCompanyId,
  });
  const isolatedWorkspacesEnabled = experimentalSettings?.enableIsolatedWorkspaces === true;
  const externalObjectsEnabled = experimentalSettings?.enableExternalObjects === true;
  const { data: executionWorkspaces = [] } = useQuery({
    queryKey: selectedCompanyId
      ? queryKeys.executionWorkspaces.summaryList(selectedCompanyId)
      : ["execution-workspaces", "__disabled__"],
    queryFn: () => executionWorkspacesApi.listSummaries(selectedCompanyId!),
    enabled: !!selectedCompanyId && isolatedWorkspacesEnabled,
  });

  useEffect(() => {
    setBreadcrumbs([{ label: surfaceLabel }]);
  }, [setBreadcrumbs, surfaceLabel]);

  useEffect(() => {
    saveLastInboxTab(tab);
    setSelectedIndex(-1);
    setSearchQuery("");
  }, [tab]);

  const previousSelectedCompanyIdRef = useRef<string | null>(selectedCompanyId);
  useEffect(() => {
    if (previousSelectedCompanyIdRef.current !== selectedCompanyId) {
      previousSelectedCompanyIdRef.current = selectedCompanyId;
      const preferences = loadInboxCollectionPreferences(selectedCompanyId);
      setFilterPreferences(preferences.viewState);
      setVisibleIssueColumns(preferences.columns);
      setCollapsedGroupKeys(loadCollapsedInboxGroupKeys(selectedCompanyId));
      setCollapsedInboxParents(loadCollapsedInboxParentIds(selectedCompanyId));
    }
  }, [selectedCompanyId]);

  const {
    data: approvals,
    isLoading: isApprovalsLoading,
    error: approvalsError,
  } = useQuery({
    queryKey: queryKeys.approvals.list(selectedCompanyId!),
    queryFn: () => approvalsApi.list(selectedCompanyId!),
    enabled: !!selectedCompanyId,
  });

  const {
    data: joinRequests = [],
    isLoading: isJoinRequestsLoading,
  } = useQuery({
    queryKey: queryKeys.access.joinRequests(selectedCompanyId!),
    queryFn: async () => {
      try {
        return await accessApi.listJoinRequests(selectedCompanyId!, "pending_approval");
      } catch (err) {
        if (err instanceof ApiError && (err.status === 403 || err.status === 401)) {
          return [];
        }
        throw err;
      }
    },
    enabled: !!selectedCompanyId,
    retry: false,
  });

  const dashboardQueryKey = queryKeys.dashboard(selectedCompanyId!);
  const sharedDashboard = useSharedPollingQuery({
    companyId: selectedCompanyId,
    resourceKey: "dashboard",
    queryKey: dashboardQueryKey,
    enabled: !!selectedCompanyId,
  });
  const { data: dashboard, isLoading: isDashboardLoading, dataUpdatedAt: dashboardUpdatedAt } = useQuery({
    queryKey: dashboardQueryKey,
    queryFn: () => dashboardApi.summary(selectedCompanyId!),
    enabled: !!selectedCompanyId,
  });
  usePublishSharedQueryData(sharedDashboard, dashboard, dashboardUpdatedAt);

  const inboxIssuesQueryKey = [...queryKeys.issues.list(selectedCompanyId!), "compact", "with-routine-executions", "live-descendant-summary", INBOX_ISSUE_LIST_LIMIT] as const;
  const sharedInboxIssues = useSharedPollingQuery<Issue[]>({
    companyId: selectedCompanyId,
    resourceKey: "inbox:issues",
    queryKey: inboxIssuesQueryKey,
    enabled: !!selectedCompanyId,
  });
  const { data: issues, isLoading: isIssuesLoading, dataUpdatedAt: issuesUpdatedAt } = useQuery({
    queryKey: inboxIssuesQueryKey,
    queryFn: () =>
      issuesApi.listCompact(selectedCompanyId!, {
        includeRoutineExecutions: true,
        includeLiveDescendantSummary: true,
        limit: INBOX_ISSUE_LIST_LIMIT,
      }).then((rows) => rows as Issue[]),
    enabled: !!selectedCompanyId,
    refetchOnWindowFocus: false,
    staleTime: INBOX_HOT_PATH_STALE_MS,
  });
  usePublishSharedQueryData(sharedInboxIssues, issues, issuesUpdatedAt);
  const {
    data: mineIssuesRaw = [],
    isLoading: isMineIssuesLoading,
    dataUpdatedAt: mineIssuesUpdatedAt,
  } = useQuery({
    queryKey: [...queryKeys.issues.listMineByMe(selectedCompanyId!), "compact", "with-routine-executions", "live-descendant-summary", INBOX_ISSUE_LIST_LIMIT] as const,
    queryFn: () =>
      issuesApi.listCompact(selectedCompanyId!, {
        touchedByUserId: "me",
        inboxArchivedByUserId: "me",
        status: INBOX_MINE_ISSUE_STATUS_FILTER,
        includeRoutineExecutions: true,
        includeLiveDescendantSummary: true,
        limit: INBOX_ISSUE_LIST_LIMIT,
      }).then((rows) => rows as Issue[]),
    enabled: !!selectedCompanyId,
    refetchOnWindowFocus: false,
    staleTime: INBOX_HOT_PATH_STALE_MS,
  });
  const mineIssuesQueryKey = [...queryKeys.issues.listMineByMe(selectedCompanyId!), "compact", "with-routine-executions", "live-descendant-summary", INBOX_ISSUE_LIST_LIMIT] as const;
  const sharedMineIssues = useSharedPollingQuery<Issue[]>({
    companyId: selectedCompanyId,
    resourceKey: "inbox:mine-issues",
    queryKey: mineIssuesQueryKey,
    enabled: !!selectedCompanyId,
  });
  usePublishSharedQueryData(sharedMineIssues, mineIssuesRaw, mineIssuesUpdatedAt);
  const {
    data: touchedIssuesRaw = [],
    isLoading: isTouchedIssuesLoading,
    dataUpdatedAt: touchedIssuesUpdatedAt,
  } = useQuery({
    queryKey: [...queryKeys.issues.listTouchedByMe(selectedCompanyId!), "compact", "with-routine-executions", "live-descendant-summary", INBOX_ISSUE_LIST_LIMIT] as const,
    queryFn: () =>
      issuesApi.listCompact(selectedCompanyId!, {
        touchedByUserId: "me",
        status: INBOX_MINE_ISSUE_STATUS_FILTER,
        includeRoutineExecutions: true,
        includeLiveDescendantSummary: true,
        limit: INBOX_ISSUE_LIST_LIMIT,
      }).then((rows) => rows as Issue[]),
    enabled: !!selectedCompanyId,
    refetchOnWindowFocus: false,
    staleTime: INBOX_HOT_PATH_STALE_MS,
  });
  const touchedIssuesQueryKey = [...queryKeys.issues.listTouchedByMe(selectedCompanyId!), "compact", "with-routine-executions", "live-descendant-summary", INBOX_ISSUE_LIST_LIMIT] as const;
  const sharedTouchedIssues = useSharedPollingQuery<Issue[]>({
    companyId: selectedCompanyId,
    resourceKey: "inbox:touched-issues",
    queryKey: touchedIssuesQueryKey,
    enabled: !!selectedCompanyId,
  });
  usePublishSharedQueryData(sharedTouchedIssues, touchedIssuesRaw, touchedIssuesUpdatedAt);

  const { data: heartbeatRuns, isLoading: isRunsLoading } = useQuery({
    queryKey: [...queryKeys.heartbeats(selectedCompanyId!), "limit", INBOX_HEARTBEAT_RUN_LIMIT],
    queryFn: () => heartbeatsApi.list(selectedCompanyId!, undefined, INBOX_HEARTBEAT_RUN_LIMIT, { summary: true }),
    enabled: !!selectedCompanyId,
    refetchOnWindowFocus: false,
    staleTime: INBOX_HOT_PATH_STALE_MS,
  });
  const liveRunsQueryKey = queryKeys.liveRuns(selectedCompanyId!);
  const sharedLiveRuns = useSharedPollingQuery({
    companyId: selectedCompanyId,
    resourceKey: "live-runs",
    queryKey: liveRunsQueryKey,
    enabled: !!selectedCompanyId,
    // Event-sourced via LiveUpdatesProvider (GitHub issue 9627); no interval poll needed.
    refetchInterval: false,
    leaderOnly: true,
  });
  const { data: liveRuns, dataUpdatedAt: liveRunsUpdatedAt } = useQuery({
    queryKey: liveRunsQueryKey,
    queryFn: () => heartbeatsApi.liveRunsForCompany(selectedCompanyId!),
    enabled: sharedLiveRuns.enabled,
    refetchInterval: sharedLiveRuns.refetchInterval,
  });
  usePublishSharedQueryData(sharedLiveRuns, liveRuns, liveRunsUpdatedAt);
  const { data: companyMembers } = useQuery({
    queryKey: queryKeys.access.companyUserDirectory(selectedCompanyId!),
    queryFn: () => accessApi.listUserDirectory(selectedCompanyId!),
    enabled: !!selectedCompanyId,
  });
  const currentUserId = session?.user.id ?? session?.session.userId ?? null;
  const [archivingIssueIds, setArchivingIssueIds] = useState<Set<string>>(new Set());
  const [undoableArchiveIssueIds, setUndoableArchiveIssueIds] = useState<string[]>([]);
  const [unarchivingIssueIds, setUnarchivingIssueIds] = useState<Set<string>>(new Set());
  const guardedArchiveIssueIds = useLocalInboxArchiveIssueIds(selectedCompanyId);
  const locallyArchivedIssueIds = useMemo(() => {
    const issueIds = new Set(guardedArchiveIssueIds);
    for (const issueId of undoableArchiveIssueIds) issueIds.add(issueId);
    for (const issueId of archivingIssueIds) issueIds.add(issueId);
    for (const issueId of unarchivingIssueIds) issueIds.delete(issueId);
    return issueIds;
  }, [archivingIssueIds, guardedArchiveIssueIds, undoableArchiveIssueIds, unarchivingIssueIds]);

  const companyUserLabelMap = useMemo(
    () => buildCompanyUserLabelMap(companyMembers?.users),
    [companyMembers?.users],
  );
  const companyUserProfileMap = useMemo(
    () => buildCompanyUserProfileMap(companyMembers?.users),
    [companyMembers?.users],
  );

  const mineIssues = useMemo(
    () => getRecentTouchedIssues(mineIssuesRaw).filter((issue) => !locallyArchivedIssueIds.has(issue.id)),
    [locallyArchivedIssueIds, mineIssuesRaw],
  );
  const touchedIssues = useMemo(
    () => getRecentTouchedIssues(touchedIssuesRaw).filter((issue) => !locallyArchivedIssueIds.has(issue.id)),
    [locallyArchivedIssueIds, touchedIssuesRaw],
  );
  const shouldUseIssueSearchSupplement =
    !!selectedCompanyId
    && normalizedSearchQuery.length > 0;
  const { data: remoteIssueSearchResults = [] } = useQuery({
    queryKey: [
      ...queryKeys.issues.search(selectedCompanyId!, normalizedSearchQuery, undefined, 25),
      "compact",
      "inbox-supplement",
      "live-descendant-summary",
    ],
    queryFn: () =>
      issuesApi.listCompact(selectedCompanyId!, {
        q: normalizedSearchQuery,
        limit: 25,
        includeRoutineExecutions: true,
        includeLiveDescendantSummary: true,
      }).then((rows) => rows as Issue[]),
    enabled: shouldUseIssueSearchSupplement,
    placeholderData: (previousData) => previousData,
  });
  const liveIssueIds = useMemo(
    () => collectLiveIssueIds(liveRuns, [
      ...(issues ?? []),
      ...mineIssuesRaw,
      ...touchedIssuesRaw,
      ...remoteIssueSearchResults,
    ]),
    [issues, liveRuns, mineIssuesRaw, remoteIssueSearchResults, touchedIssuesRaw],
  );
  const inboxIssueIdsForExternalObjectSummaries = useMemo(() => {
    const issueIds = new Set<string>();
    for (const issue of mineIssues) issueIds.add(issue.id);
    for (const issue of touchedIssues) issueIds.add(issue.id);
    for (const issue of remoteIssueSearchResults) issueIds.add(issue.id);
    return [...issueIds];
  }, [mineIssues, remoteIssueSearchResults, touchedIssues]);
  const {
    summaries: externalObjectSummaryByIssueId,
    isLoading: externalObjectSummariesLoading,
    isReady: externalObjectSummariesReady,
  } = useIssueExternalObjectSummaries(
    selectedCompanyId,
    inboxIssueIdsForExternalObjectSummaries,
  );
  const issueFilterContext = useMemo(() => ({
    externalObjectSummaryByIssueId,
    externalObjectSummariesReady: externalObjectSummariesReady && !externalObjectSummariesLoading,
  }), [externalObjectSummariesLoading, externalObjectSummariesReady, externalObjectSummaryByIssueId]);
  const visibleMineIssues = useMemo(
    () => applyIssueFilters(mineIssues, issueFilters, currentUserId, true, liveIssueIds, issueFilterContext),
    [mineIssues, issueFilters, currentUserId, liveIssueIds, issueFilterContext],
  );
  const visibleTouchedIssues = useMemo(
    () => applyIssueFilters(touchedIssues, issueFilters, currentUserId, true, liveIssueIds, issueFilterContext),
    [touchedIssues, issueFilters, currentUserId, liveIssueIds, issueFilterContext],
  );
  const unreadTouchedIssues = useMemo(
    () => visibleTouchedIssues.filter((issue) => issue.isUnreadForMe),
    [visibleTouchedIssues],
  );
  const creatorOptions = useMemo<CreatorOption[]>(() => {
    const options = new Map<string, CreatorOption>();
    const sourceIssues = [...mineIssues, ...touchedIssues];

    if (currentUserId) {
      options.set(`user:${currentUserId}`, {
        id: `user:${currentUserId}`,
        label: currentUserId === "local-board" ? "Board" : "Me",
        kind: "user",
        searchText: currentUserId === "local-board" ? "board me human local-board" : `me board human ${currentUserId}`,
      });
    }

    for (const issue of sourceIssues) {
      if (issue.createdByUserId) {
        const id = `user:${issue.createdByUserId}`;
        if (!options.has(id)) {
          options.set(id, {
            id,
            label: formatAssigneeUserLabel(issue.createdByUserId, currentUserId) ?? issue.createdByUserId.slice(0, 5),
            kind: "user",
            searchText: `${issue.createdByUserId} board user human`,
          });
        }
      }
    }

    const knownAgentIds = new Set<string>();
    for (const agent of agents ?? []) {
      knownAgentIds.add(agent.id);
      const id = `agent:${agent.id}`;
      if (!options.has(id)) {
        options.set(id, {
          id,
          label: agent.name,
          kind: "agent",
          searchText: `${agent.name} ${agent.id} agent`,
        });
      }
    }

    for (const issue of sourceIssues) {
      if (issue.createdByAgentId && !knownAgentIds.has(issue.createdByAgentId)) {
        const id = `agent:${issue.createdByAgentId}`;
        if (!options.has(id)) {
          options.set(id, {
            id,
            label: issue.createdByAgentId.slice(0, 8),
            kind: "agent",
            searchText: `${issue.createdByAgentId} agent`,
          });
        }
      }
    }

    return [...options.values()].sort((a, b) => {
      if (a.kind !== b.kind) return a.kind === "user" ? -1 : 1;
      return a.label.localeCompare(b.label);
    });
  }, [agents, currentUserId, mineIssues, touchedIssues]);
  const issuesToRender = useMemo(
    () => {
      if (tab === "mine") return visibleMineIssues;
      if (tab === "unread") return unreadTouchedIssues;
      return visibleTouchedIssues;
    },
    [tab, visibleMineIssues, visibleTouchedIssues, unreadTouchedIssues],
  );

  const agentById = useMemo(() => {
    const map = new Map<string, string>();
    for (const agent of agents ?? []) map.set(agent.id, agent.name);
    return map;
  }, [agents]);

  const issueById = useMemo(() => {
    const map = new Map<string, Issue>();
    for (const issue of issues ?? []) map.set(issue.id, issue);
    return map;
  }, [issues]);
  const projectById = useMemo(() => {
    const map = new Map<string, { name: string; color: string | null }>();
    for (const project of projects ?? []) {
      map.set(project.id, { name: project.name, color: project.color });
    }
    return map;
  }, [projects]);
  const projectWorkspaceById = useMemo(() => {
    const map = new Map<string, { name: string; projectId: string }>();
    for (const project of projects ?? []) {
      for (const workspace of project.workspaces ?? []) {
        map.set(workspace.id, { name: workspace.name, projectId: project.id });
      }
    }
    return map;
  }, [projects]);
  const defaultProjectWorkspaceIdByProjectId = useMemo(() => {
    const map = new Map<string, string>();
    for (const project of projects ?? []) {
      const defaultWorkspaceId =
        project.executionWorkspacePolicy?.defaultProjectWorkspaceId
        ?? project.primaryWorkspace?.id
        ?? null;
      if (defaultWorkspaceId) map.set(project.id, defaultWorkspaceId);
    }
    return map;
  }, [projects]);
  const executionWorkspaceById = useMemo(() => {
    const map = new Map<string, {
      name: string;
      mode: "shared_workspace" | "isolated_workspace" | "operator_branch" | "adapter_managed" | "cloud_sandbox";
      projectWorkspaceId: string | null;
      projectId: string | null;
    }>();
    for (const workspace of executionWorkspaces) {
      const projectWorkspace = workspace.projectWorkspaceId
        ? projectWorkspaceById.get(workspace.projectWorkspaceId) ?? null
        : null;
      map.set(workspace.id, {
        name: workspace.name,
        mode: workspace.mode,
        projectWorkspaceId: workspace.projectWorkspaceId ?? null,
        projectId: projectWorkspace?.projectId ?? null,
      });
    }
    return map;
  }, [executionWorkspaces, projectWorkspaceById]);
  const inboxWorkspaceGrouping = useMemo<InboxWorkspaceGroupingOptions>(
    () => ({
      agentById,
      executionWorkspaceById,
      projectWorkspaceById,
      defaultProjectWorkspaceIdByProjectId,
      projectById,
      userLabelById: companyUserLabelMap,
      currentUserId,
    }),
    [
      agentById,
      companyUserLabelMap,
      currentUserId,
      defaultProjectWorkspaceIdByProjectId,
      executionWorkspaceById,
      projectById,
      projectWorkspaceById,
    ],
  );
  const visibleIssueColumnSet = useMemo(() => new Set(visibleIssueColumns), [visibleIssueColumns]);
  const availableIssueColumns = useMemo(
    () => getAvailableInboxIssueColumns(isolatedWorkspacesEnabled),
    [isolatedWorkspacesEnabled],
  );
  const availableIssueColumnSet = useMemo(() => new Set(availableIssueColumns), [availableIssueColumns]);
  const visibleTrailingIssueColumns = useMemo(
    () => issueTrailingColumns.filter((column) => visibleIssueColumnSet.has(column) && availableIssueColumnSet.has(column)),
    [availableIssueColumnSet, visibleIssueColumnSet],
  );
  const visibleTaskDataColumns = useMemo(
    () => visibleTrailingIssueColumns.filter((column) => column !== "updated"),
    [visibleTrailingIssueColumns],
  );
  const showTaskTimestamp = visibleIssueColumnSet.has("updated") && availableIssueColumnSet.has("updated");

  const failedRuns = useMemo(
    () =>
      getLatestFailedRunsByAgent(heartbeatRuns ?? []).filter(
        (r) => !isInboxEntityDismissed(dismissedAtByKey, `run:${r.id}`, r.createdAt),
      ),
    [heartbeatRuns, dismissedAtByKey],
  );
  const approvalsToRender = useMemo(() => {
    let filtered = getApprovalsForTab(approvals ?? [], tab, allApprovalFilter, currentUserId);
    if (tab === "mine") {
      filtered = filtered.filter(
        (a) => !isInboxEntityDismissed(dismissedAtByKey, `approval:${a.id}`, a.updatedAt),
      );
    }
    return filtered;
  }, [approvals, tab, allApprovalFilter, currentUserId, dismissedAtByKey]);
  const showJoinRequestsCategory =
    allCategoryFilter === "everything" || allCategoryFilter === "join_requests";
  const showTouchedCategory =
    allCategoryFilter === "everything" || allCategoryFilter === "issues_i_touched";
  const showApprovalsCategory =
    allCategoryFilter === "everything" || allCategoryFilter === "approvals";
  const showFailedRunsCategory =
    allCategoryFilter === "everything" || allCategoryFilter === "failed_runs";
  const showAlertsCategory = allCategoryFilter === "everything" || allCategoryFilter === "alerts";
  const failedRunsForTab = useMemo(() => {
    if (tab === "all" && !showFailedRunsCategory) return [];
    if (tab === "mine") return failedRuns.filter((run) => isHeartbeatRunVisibleInMine(run, currentUserId));
    return failedRuns;
  }, [failedRuns, tab, showFailedRunsCategory, currentUserId]);

  const joinRequestsForTab = useMemo(() => {
    if (tab === "all" && !showJoinRequestsCategory) return [];
    if (tab === "mine") {
      return joinRequests.filter(
        (jr) => !isInboxEntityDismissed(dismissedAtByKey, `join:${jr.id}`, jr.updatedAt ?? jr.createdAt),
      );
    }
    return joinRequests;
  }, [joinRequests, tab, showJoinRequestsCategory, dismissedAtByKey]);

  const workItemsToRender = useMemo(
    () =>
      getInboxWorkItems({
        issues: tab === "all" && !showTouchedCategory ? [] : issuesToRender,
        approvals: tab === "all" && !showApprovalsCategory ? [] : approvalsToRender,
        failedRuns: failedRunsForTab,
        joinRequests: joinRequestsForTab,
      }),
    [approvalsToRender, issuesToRender, showApprovalsCategory, showTouchedCategory, tab, failedRunsForTab, joinRequestsForTab],
  );

  const filteredWorkItems = useMemo(() => {
    const q = normalizedSearchQuery.toLowerCase();
    if (!q) return workItemsToRender;
    return workItemsToRender.filter((item) => {
      if (item.kind === "issue") {
        return matchesInboxIssueSearch(item.issue, q, {
          isolatedWorkspacesEnabled,
          executionWorkspaceById,
          projectWorkspaceById,
          defaultProjectWorkspaceIdByProjectId,
        });
      }
      if (item.kind === "approval") {
        const a = item.approval;
        const label = approvalLabel(a.type, a.payload as Record<string, unknown> | null);
        if (label.toLowerCase().includes(q)) return true;
        if (a.type.toLowerCase().includes(q)) return true;
        return false;
      }
      if (item.kind === "failed_run") {
        const run = item.run;
        const name = agentById.get(run.agentId);
        if (name?.toLowerCase().includes(q)) return true;
        const msg = runFailureMessage(run);
        if (msg.toLowerCase().includes(q)) return true;
        const issueId = readIssueIdFromRun(run);
        if (issueId) {
          const issue = issueById.get(issueId);
          if (issue?.title.toLowerCase().includes(q)) return true;
          if (issue?.identifier?.toLowerCase().includes(q)) return true;
        }
        return false;
      }
      if (item.kind === "join_request") {
        const jr = item.joinRequest;
        if (jr.agentName?.toLowerCase().includes(q)) return true;
        if (jr.capabilities?.toLowerCase().includes(q)) return true;
        return false;
      }
      return false;
    });
  }, [
    workItemsToRender,
    agentById,
    defaultProjectWorkspaceIdByProjectId,
    executionWorkspaceById,
    issueById,
    isolatedWorkspacesEnabled,
    normalizedSearchQuery,
    projectWorkspaceById,
  ]);

  const archivedSearchIssues = useMemo(
    () =>
      tab === "mine"
        ? getArchivedInboxSearchIssues({
          visibleIssues: visibleMineIssues,
          searchableIssues: visibleTouchedIssues,
          query: normalizedSearchQuery,
          isolatedWorkspacesEnabled,
          executionWorkspaceById,
          projectWorkspaceById,
          defaultProjectWorkspaceIdByProjectId,
        })
        : [],
    [
      defaultProjectWorkspaceIdByProjectId,
      executionWorkspaceById,
      isolatedWorkspacesEnabled,
      normalizedSearchQuery,
      projectWorkspaceById,
      tab,
      visibleMineIssues,
      visibleTouchedIssues,
    ],
  );
  const issueSearchSupplementResults = useMemo(
    () =>
      getInboxSearchSupplementIssues({
        query: normalizedSearchQuery,
        filteredWorkItems,
        archivedSearchIssues,
        remoteIssues: remoteIssueSearchResults,
        issueFilters,
        currentUserId,
        enableRoutineVisibilityFilter: true,
        liveIssueIds,
        issueFilterContext,
      }),
    [
      archivedSearchIssues,
      currentUserId,
      filteredWorkItems,
      issueFilterContext,
      issueFilters,
      liveIssueIds,
      normalizedSearchQuery,
      remoteIssueSearchResults,
    ],
  );
  const nonInboxSearchIssueIds = useMemo(
    () => new Set([
      ...archivedSearchIssues.map((issue) => issue.id),
      ...issueSearchSupplementResults.map((issue) => issue.id),
    ]),
    [archivedSearchIssues, issueSearchSupplementResults],
  );

  // --- Parent-child nesting for inbox issues ---
  const [nestingPreferenceEnabled, setNestingPreferenceEnabled] = useState(() => loadInboxNesting());
  const nestingEnabled = resolveInboxNestingEnabled(nestingPreferenceEnabled, isMobile);
  useEffect(() => {
    if (!shouldResetInboxWorkspaceGrouping(groupBy, isolatedWorkspacesEnabled, experimentalSettingsLoaded)) return;
    setGroupBy("none");
    saveInboxWorkItemGroupBy("none");
  }, [experimentalSettingsLoaded, groupBy, isolatedWorkspacesEnabled]);
  const toggleNesting = useCallback(() => {
    setNestingPreferenceEnabled((prev) => {
      const next = !prev;
      saveInboxNesting(next);
      return next;
    });
  }, []);
  const [collapsedInboxParents, setCollapsedInboxParents] = useState<Set<string>>(
    () => loadCollapsedInboxParentIds(selectedCompanyId),
  );
  const [collapsedGroupKeys, setCollapsedGroupKeys] = useState<Set<string>>(() => loadCollapsedInboxGroupKeys(selectedCompanyId));
  const toggleGroupCollapse = useCallback((groupKey: string) => {
    setCollapsedGroupKeys((prev) => {
      const next = new Set(prev);
      if (next.has(groupKey)) next.delete(groupKey);
      else next.add(groupKey);
      saveCollapsedInboxGroupKeys(selectedCompanyId, next);
      return next;
    });
  }, [selectedCompanyId]);
  const setGroupCollapsed = useCallback((groupKey: string, collapsed: boolean) => {
    setCollapsedGroupKeys((prev) => {
      if (collapsed ? prev.has(groupKey) : !prev.has(groupKey)) return prev;
      const next = new Set(prev);
      if (collapsed) next.add(groupKey);
      else next.delete(groupKey);
      saveCollapsedInboxGroupKeys(selectedCompanyId, next);
      return next;
    });
  }, [selectedCompanyId]);
  const freshGroupedSections = useMemo<InboxGroupedSection[]>(() => [
    ...buildGroupedInboxSections(filteredWorkItems, groupBy, inboxWorkspaceGrouping, { nestingEnabled }),
    ...buildGroupedInboxSections(
      getInboxWorkItems({ issues: archivedSearchIssues, approvals: [] }),
      groupBy,
      inboxWorkspaceGrouping,
      { keyPrefix: "archived-search:", searchSection: "archived", nestingEnabled },
    ),
    ...buildGroupedInboxSections(
      getInboxWorkItems({ issues: issueSearchSupplementResults, approvals: [] }),
      groupBy,
      inboxWorkspaceGrouping,
      { keyPrefix: "other-search:", searchSection: "other", nestingEnabled },
    ),
  ], [
    archivedSearchIssues,
    filteredWorkItems,
    groupBy,
    inboxWorkspaceGrouping,
    issueSearchSupplementResults,
    nestingEnabled,
  ]);

  // --- Order pinning (PAP-16015) ---
  // The freshly computed sort is only *displayed* at attention boundaries. Between
  // them we reconcile the fresh sections against the last committed order so that
  // archiving mid-engagement (which drops rows from the caches, and can lower a
  // parent's subtree-max sort ts) can no longer reshuffle the list under the
  // cursor. New items still land at their algorithmic position; archived rows hold
  // their slot for the 5s undo grace before collapsing. See `inboxOrderPin.ts`.
  const orderPinRef = useRef<InboxOrderPin>({ sections: [] });
  // Bumped by an attention commit to force `groupedSections` to adopt the fresh order.
  const [orderCommitToken, setOrderCommitToken] = useState(0);
  const orderCommitRequestedRef = useRef(false);
  const commitInboxOrder = useCallback(() => {
    orderCommitRequestedRef.current = true;
    setOrderCommitToken((token) => token + 1);
  }, []);

  // Distinct view = distinct pin. Switching tab/filter/search/grouping resets the
  // held order so we never carry one view's layout into another.
  const inboxSortViewIdentity = useMemo(
    () =>
      JSON.stringify([
        selectedCompanyId,
        tab,
        groupBy,
        nestingEnabled,
        normalizedSearchQuery,
        allCategoryFilter,
        allApprovalFilter,
        issueFilters,
      ]),
    [
      allApprovalFilter,
      allCategoryFilter,
      groupBy,
      issueFilters,
      nestingEnabled,
      normalizedSearchQuery,
      selectedCompanyId,
      tab,
    ],
  );
  // Adopt the fresh order in the SAME render the view identity changes, so a
  // section key shared between the two views never briefly shows the previous
  // view's order before the hook's passive commit effect runs.
  const previousInboxSortViewIdentityRef = useRef(inboxSortViewIdentity);
  if (previousInboxSortViewIdentityRef.current !== inboxSortViewIdentity) {
    previousInboxSortViewIdentityRef.current = inboxSortViewIdentity;
    orderCommitRequestedRef.current = true;
  }

  const groupedSections = useMemo<InboxGroupedSection[]>(() => {
    const nowMs = Date.now();
    // An attention boundary (or a view change) fired: adopt the fresh order
    // wholesale and re-pin it.
    if (orderCommitRequestedRef.current) {
      orderCommitRequestedRef.current = false;
      orderPinRef.current = captureInboxOrderPin(freshGroupedSections);
      return freshGroupedSections;
    }
    const { sections, pin } = reconcileInboxOrderPin(orderPinRef.current, freshGroupedSections, nowMs);
    orderPinRef.current = pin;
    return sections;
    // orderCommitToken forces re-adoption at a commit boundary; inboxSortViewIdentity
    // forces it on a view change even when the fresh sections keep their identity.
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [freshGroupedSections, inboxSortViewIdentity, orderCommitToken]);

  const inboxSortAttention = useInboxSortAttention({
    viewIdentity: inboxSortViewIdentity,
    onCommit: commitInboxOrder,
  });
  const noteInboxSortInteraction = inboxSortAttention.noteInteraction;

  const openCreateIssueForGroup = useCallback((group: InboxGroupedSection) => {
    const defaults = buildInboxIssueGroupCreateDefaults(
      group.key,
      groupBy,
      group.displayItems,
      inboxWorkspaceGrouping,
    );
    if (!defaults) return;
    openNewIssue(defaults);
  }, [groupBy, inboxWorkspaceGrouping, openNewIssue]);
  const totalVisibleWorkItems = useMemo(
    () => groupedSections.reduce((count, group) => count + group.displayItems.length, 0),
    [groupedSections],
  );
  const toggleInboxParentCollapse = useCallback((parentId: string) => {
    setCollapsedInboxParents((prev) => {
      const next = new Set(prev);
      if (next.has(parentId)) next.delete(parentId);
      else next.add(parentId);
      saveCollapsedInboxParentIds(selectedCompanyId, next);
      return next;
    });
  }, [selectedCompanyId]);
  const setInboxParentCollapsed = useCallback((parentId: string, collapsed: boolean) => {
    setCollapsedInboxParents((prev) => {
      if (prev.has(parentId) === collapsed) return prev;
      const next = new Set(prev);
      if (collapsed) next.add(parentId);
      else next.delete(parentId);
      saveCollapsedInboxParentIds(selectedCompanyId, next);
      return next;
    });
  }, [selectedCompanyId]);

  // Build flat navigation list from visible rows so keyboard traversal respects collapsed groups.
  const flatNavItems = useMemo((): NavEntry[] => {
    return buildInboxKeyboardNavEntries(groupedSections, collapsedGroupKeys, collapsedInboxParents);
  }, [collapsedGroupKeys, collapsedInboxParents, groupedSections]);
  // Read the current nav list from event handlers without recreating them (and
  // without capturing a stale array), so hover can resolve the row's key.
  const flatNavItemsRef = useRef(flatNavItems);
  flatNavItemsRef.current = flatNavItems;
  // Roll live descendant runs up to their ancestors across the loaded inbox tree
  // so a parent that is not itself live can still surface "n live below".
  const subtreeLiveCounts = useMemo(() => {
    const nodes: { id: string; parentId: string | null }[] = [];
    const seen = new Set<string>();
    const pushIssue = (issue: Issue) => {
      if (seen.has(issue.id)) return;
      seen.add(issue.id);
      nodes.push({ id: issue.id, parentId: issue.parentId });
    };
    for (const group of groupedSections) {
      for (const item of group.displayItems) {
        if (item.kind === "issue") pushIssue(item.issue);
      }
      for (const children of group.childrenByIssueId.values()) {
        for (const child of children) pushIssue(child);
      }
    }
    return collectSubtreeLiveCounts(nodes, liveIssueIds);
  }, [groupedSections, liveIssueIds]);
  const topFlatIndex = useMemo(() => {
    const map = new Map<string, number>();
    flatNavItems.forEach((entry, index) => {
      if (entry.type === "top") map.set(entry.itemKey, index);
    });
    return map;
  }, [flatNavItems]);
  const childFlatIndex = useMemo(() => {
    const map = new Map<string, number>();
    flatNavItems.forEach((entry, index) => {
      if (entry.type === "child") map.set(entry.issueId, index);
    });
    return map;
  }, [flatNavItems]);
  const groupFlatIndex = useMemo(() => {
    const map = new Map<string, number>();
    flatNavItems.forEach((entry, index) => {
      if (entry.type === "group") map.set(entry.groupKey, index);
    });
    return map;
  }, [flatNavItems]);

  const agentName = (id: string | null) => {
    if (!id) return null;
    return agentById.get(id) ?? null;
  };
  const setIssueColumns = useCallback((next: InboxIssueColumn[]) => {
    const normalized = normalizeInboxIssueColumns(next);
    setVisibleIssueColumns(normalized);
    saveTaskCollectionPreferences(inboxCollectionPreferenceLocation(selectedCompanyId), {
      viewState: filterPreferences,
      columns: normalized,
    });
  }, [filterPreferences, selectedCompanyId]);
  const toggleIssueColumn = useCallback((column: InboxIssueColumn, enabled: boolean) => {
    if (enabled) {
      setIssueColumns([...visibleIssueColumns, column]);
      return;
    }
    setIssueColumns(visibleIssueColumns.filter((value) => value !== column));
  }, [setIssueColumns, visibleIssueColumns]);
  const updateFilterPreferences = useCallback(
    (updater: (previous: StreamlinedInboxViewState) => StreamlinedInboxViewState) => {
      setFilterPreferences((previous) => {
        const next = updater(previous);
        saveTaskCollectionPreferences(inboxCollectionPreferenceLocation(selectedCompanyId), {
          viewState: next,
          columns: visibleIssueColumns,
        });
        return next;
      });
    },
    [selectedCompanyId, visibleIssueColumns],
  );
  const updateIssueFilters = useCallback((patch: Partial<IssueFilterState>) => {
    updateFilterPreferences((previous) => ({
      ...previous,
      issueFilters: { ...previous.issueFilters, ...patch },
    }));
  }, [updateFilterPreferences]);
  useEffect(() => {
    if (!experimentalSettingsLoaded || externalObjectsEnabled || issueFilters.externalObjectStatuses.length === 0) return;
    updateIssueFilters({ externalObjectStatuses: [] });
  }, [
    experimentalSettingsLoaded,
    externalObjectsEnabled,
    issueFilters.externalObjectStatuses.length,
    updateIssueFilters,
  ]);
  const updateAllCategoryFilter = useCallback((value: InboxCategoryFilter) => {
    updateFilterPreferences((previous) => ({ ...previous, allCategoryFilter: value }));
  }, [updateFilterPreferences]);
  const updateAllApprovalFilter = useCallback((value: InboxApprovalFilter) => {
    updateFilterPreferences((previous) => ({ ...previous, allApprovalFilter: value }));
  }, [updateFilterPreferences]);
  const updateGroupBy = useCallback((nextGroupBy: InboxWorkItemGroupBy) => {
    setGroupBy(nextGroupBy);
    saveInboxWorkItemGroupBy(nextGroupBy);
  }, []);

  const approveMutation = useMutation({
    mutationFn: (id: string) => approvalsApi.approve(id),
    onSuccess: (_approval, id) => {
      setActionError(null);
      queryClient.invalidateQueries({ queryKey: queryKeys.approvals.list(selectedCompanyId!) });
      navigate(`/approvals/${id}?resolved=approved`);
    },
    onError: (err) => {
      setActionError(err instanceof Error ? err.message : "Failed to approve");
    },
  });

  const rejectMutation = useMutation({
    mutationFn: (id: string) => approvalsApi.reject(id),
    onSuccess: () => {
      setActionError(null);
      queryClient.invalidateQueries({ queryKey: queryKeys.approvals.list(selectedCompanyId!) });
    },
    onError: (err) => {
      setActionError(err instanceof Error ? err.message : "Failed to reject");
    },
  });

  const approveJoinMutation = useMutation({
    mutationFn: (joinRequest: JoinRequest) =>
      accessApi.approveJoinRequest(selectedCompanyId!, joinRequest.id),
    onSuccess: () => {
      setActionError(null);
      queryClient.invalidateQueries({ queryKey: queryKeys.access.joinRequests(selectedCompanyId!) });
      queryClient.invalidateQueries({ queryKey: queryKeys.sidebarBadges(selectedCompanyId!) });
      queryClient.invalidateQueries({ queryKey: queryKeys.agents.list(selectedCompanyId!) });
      queryClient.invalidateQueries({ queryKey: queryKeys.companies.all });
    },
    onError: (err) => {
      setActionError(err instanceof Error ? err.message : "Failed to approve join request");
    },
  });

  const rejectJoinMutation = useMutation({
    mutationFn: (joinRequest: JoinRequest) =>
      accessApi.rejectJoinRequest(selectedCompanyId!, joinRequest.id),
    onSuccess: () => {
      setActionError(null);
      queryClient.invalidateQueries({ queryKey: queryKeys.access.joinRequests(selectedCompanyId!) });
      queryClient.invalidateQueries({ queryKey: queryKeys.sidebarBadges(selectedCompanyId!) });
    },
    onError: (err) => {
      setActionError(err instanceof Error ? err.message : "Failed to reject join request");
    },
  });

  const [retryingRunIds, setRetryingRunIds] = useState<Set<string>>(new Set());

  const retryRunMutation = useMutation({
    mutationFn: async (run: HeartbeatRun) => {
      const result = await agentsApi.retryFailedRun(
        run.agentId,
        run.id,
        run.companyId,
      );
      return { newRun: result, originalRun: run };
    },
    onMutate: (run) => {
      setRetryingRunIds((prev) => new Set(prev).add(run.id));
    },
    onSuccess: ({ newRun, originalRun }) => {
      queryClient.invalidateQueries({ queryKey: queryKeys.heartbeats(originalRun.companyId) });
      queryClient.invalidateQueries({ queryKey: queryKeys.heartbeats(originalRun.companyId, originalRun.agentId) });
      if (newRun.runId)
        navigate(`/agents/${originalRun.agentId}/runs/${newRun.runId}`);
      else if (newRun.issueId) navigate(`/issues/${newRun.issueId}`);
    },
    onError: (error) => {
      pushToast({
        title: "Run retry failed",
        body: error instanceof Error ? error.message : "Unable to retry run",
        tone: "error",
      });
    },
    onSettled: (_data, _error, run) => {
      if (!run) return;
      setRetryingRunIds((prev) => {
        const next = new Set(prev);
        next.delete(run.id);
        return next;
      });
    },
  });

  const [fadingOutIssues, setFadingOutIssues] = useState<Set<string>>(new Set());
  const [showMarkAllReadConfirm, setShowMarkAllReadConfirm] = useState(false);
  const [fadingNonIssueItems, setFadingNonIssueItems] = useState<Set<string>>(new Set());
  const [archivingNonIssueIds, setArchivingNonIssueIds] = useState<Set<string>>(new Set());
  const [selectedIndex, setSelectedIndex] = useState<number>(-1);
  const listRef = useRef<HTMLDivElement>(null);
  // Keyboard nav scrolls the list, which fires mouseenter on whatever row lands
  // under the stationary cursor — that must not steal the selection. Hover only
  // selects after the pointer has physically moved since the last key nav.
  const pointerMovedSinceKeyNavRef = useRef(true);
  useEffect(() => {
    const handlePointerMove = () => {
      pointerMovedSinceKeyNavRef.current = true;
    };
    window.addEventListener("mousemove", handlePointerMove, { passive: true });
    return () => window.removeEventListener("mousemove", handlePointerMove);
  }, []);
  // Which row the cursor is over, tracked WITHOUT React state so scrubbing the
  // list costs zero re-renders (hover paints via CSS `:hover`, see IssueRow).
  // Keyboard nav reads this to continue from the hovered row.
  const hoveredIndexRef = useRef<number | null>(null);
  // The hovered row's stable key, kept alongside the numeric index so a poll
  // that reshapes the list can re-anchor the hover to the same row instead of
  // dropping it (which stranded j/k back at the top — PAP-9679 regression).
  const hoveredNavKeyRef = useRef<string | null>(null);
  const setSelectedIndexFromPointer = useCallback((idx: number) => {
    if (!pointerMovedSinceKeyNavRef.current) return;
    noteInboxSortInteraction();
    hoveredIndexRef.current = idx;
    hoveredNavKeyRef.current = navEntryKey(flatNavItemsRef.current[idx]);
    // Drop any keyboard selection band the moment the mouse takes over, so we
    // never show two identical highlights at once. React bails out when the
    // value is already -1, so continuous hovering triggers no re-render.
    setSelectedIndex((prev) => (prev < 0 ? prev : -1));
  }, [noteInboxSortInteraction]);

  const invalidateInboxIssueQueryCaches = () => {
    if (!selectedCompanyId) return;
    invalidateInboxIssueQueries(queryClient, selectedCompanyId);
  };

  const archiveIssueMutation = useMutation({
    mutationFn: (id: string) => issuesApi.archiveFromInbox(id),
    onMutate: async (id) => {
      // Keep the sort pinned: archiving is engagement, so defer any idle re-sort.
      noteInboxSortInteraction();
      setActionError(null);
      setArchivingIssueIds((prev) => new Set(prev).add(id));

      if (!selectedCompanyId) return { previousData: [] as InboxIssueCacheSnapshot };
      beginLocalInboxArchive(selectedCompanyId, id);

      await cancelInboxIssueQueries(queryClient, selectedCompanyId);
      const previousData = snapshotInboxIssueCaches(queryClient, selectedCompanyId);
      removeIssueFromInboxCaches(queryClient, selectedCompanyId, id);

      return { companyId: selectedCompanyId, previousData };
    },
    onError: (err, id, context) => {
      setActionError(err instanceof Error ? err.message : "Failed to archive task");
      if (context?.companyId) clearLocalInboxArchive(context.companyId, id);
      setArchivingIssueIds((prev) => {
        const next = new Set(prev);
        next.delete(id);
        return next;
      });
      // Restore only this failed archive so overlapping archive mutations stay removed.
      if (context?.previousData) {
        restoreIssueToInboxCaches(queryClient, context.previousData, id);
      }
    },
    onSettled: async (_data, error, id, context) => {
      // Clean up archiving state and refetch to sync with server
      setArchivingIssueIds((prev) => {
        const next = new Set(prev);
        next.delete(id);
        return next;
      });
      if (!context?.companyId) return;
      if (!error) boundLocalInboxArchive(context.companyId, id);
      await invalidateInboxIssueQueries(queryClient, context.companyId);
      if (!error) {
        const presence = getIssuePresenceInActiveInboxCaches(queryClient, context.companyId, id);
        if (presence !== "unknown") confirmLocalInboxArchive(context.companyId, id);
      }
    },
    onSuccess: (_data, id) => {
      setUndoableArchiveIssueIds((prev) => [...prev.filter((issueId) => issueId !== id), id]);
    },
  });

  const unarchiveIssueMutation = useMutation({
    mutationFn: (id: string) => issuesApi.unarchiveFromInbox(id),
    onMutate: (id) => {
      setActionError(null);
      setUnarchivingIssueIds((prev) => new Set(prev).add(id));
      if (selectedCompanyId) clearLocalInboxArchive(selectedCompanyId, id);
      return { companyId: selectedCompanyId };
    },
    onError: (err, id, context) => {
      setActionError(err instanceof Error ? err.message : "Failed to undo inbox archive");
      if (context?.companyId) {
        beginLocalInboxArchive(context.companyId, id);
        boundLocalInboxArchive(context.companyId, id);
      }
    },
    onSuccess: (_data, id) => {
      setUndoableArchiveIssueIds((prev) => {
        const next = prev.filter((issueId) => issueId !== id);
        return next;
      });
    },
    onSettled: (_data, _error, id) => {
      setUnarchivingIssueIds((prev) => {
        const next = new Set(prev);
        next.delete(id);
        return next;
      });
      invalidateInboxIssueQueryCaches();
    },
  });

  const markReadMutation = useMutation({
    mutationFn: (id: string) => issuesApi.markRead(id),
    onMutate: (id) => {
      setFadingOutIssues((prev) => new Set(prev).add(id));
    },
    onSuccess: () => {
      invalidateInboxIssueQueryCaches();
    },
    onSettled: (_data, _error, id) => {
      setTimeout(() => {
        setFadingOutIssues((prev) => {
          const next = new Set(prev);
          next.delete(id);
          return next;
        });
      }, 300);
    },
  });

  const markAllReadMutation = useMutation({
    mutationFn: async (issueIds: string[]) => {
      await Promise.all(issueIds.map((issueId) => issuesApi.markRead(issueId)));
    },
    onMutate: (issueIds) => {
      setFadingOutIssues((prev) => {
        const next = new Set(prev);
        for (const issueId of issueIds) next.add(issueId);
        return next;
      });
    },
    onSuccess: () => {
      invalidateInboxIssueQueryCaches();
    },
    onSettled: (_data, _error, issueIds) => {
      setTimeout(() => {
        setFadingOutIssues((prev) => {
          const next = new Set(prev);
          for (const issueId of issueIds) next.delete(issueId);
          return next;
        });
      }, 300);
    },
  });

  const markUnreadMutation = useMutation({
    mutationFn: (id: string) => issuesApi.markUnread(id),
    onSuccess: () => {
      invalidateInboxIssueQueryCaches();
    },
  });

  const handleMarkNonIssueRead = useCallback((key: string) => {
    setFadingNonIssueItems((prev) => new Set(prev).add(key));
    markItemRead(key);
    setTimeout(() => {
      setFadingNonIssueItems((prev) => {
        const next = new Set(prev);
        next.delete(key);
        return next;
      });
    }, 300);
  }, [markItemRead]);

  const handleArchiveNonIssue = useCallback((key: string) => {
    noteInboxSortInteraction();
    setArchivingNonIssueIds((prev) => new Set(prev).add(key));
    setTimeout(() => {
      if (key.startsWith("alert:")) {
        dismissAlert(key);
      } else {
        dismissInboxItem(key);
      }
      setArchivingNonIssueIds((prev) => {
        const next = new Set(prev);
        next.delete(key);
        return next;
      });
    }, 200);
  }, [dismissAlert, dismissInboxItem, noteInboxSortInteraction]);

  const nonIssueUnreadState = (key: string): NonIssueUnreadState => {
    if (!canArchiveFromTab) return null;
    const isRead = readItems.has(key);
    const isFading = fadingNonIssueItems.has(key);
    if (isFading) return "fading";
    if (!isRead) return "visible";
    return "hidden";
  };

  // Keep selection on the same logical item when the list shape changes —
  // rows archived/refreshed above the selection would otherwise shift the
  // numeric index onto a neighboring row (and Enter would open the wrong
  // task). Falls back to clamping when the item is gone; never auto-selects
  // on initial load.
  const selectedNavKeyRef = useRef<string | null>(null);
  useEffect(() => {
    // A reshaped list invalidates the numeric hover index. Re-anchor it to the
    // same row by key (the inbox polls constantly, so nulling it here silently
    // broke hover→j/k sync — PAP-9679). Drop it only when the row is gone.
    const hoveredKey = hoveredNavKeyRef.current;
    const nextHovered =
      hoveredKey === null ? -1 : flatNavItems.findIndex((entry) => navEntryKey(entry) === hoveredKey);
    hoveredIndexRef.current = nextHovered >= 0 ? nextHovered : null;
    if (nextHovered < 0) hoveredNavKeyRef.current = null;
    setSelectedIndex((prev) => {
      if (prev < 0) return resolveInboxSelectionIndex(prev, flatNavItems.length);
      const prevKey = selectedNavKeyRef.current;
      const keyIndex = prevKey === null
        ? -1
        : flatNavItems.findIndex((entry) => navEntryKey(entry) === prevKey);
      return keyIndex >= 0 ? keyIndex : resolveInboxSelectionIndex(prev, flatNavItems.length);
    });
  }, [flatNavItems]);
  useEffect(() => {
    selectedNavKeyRef.current = selectedIndex >= 0 ? navEntryKey(flatNavItems[selectedIndex]) : null;
  }, [flatNavItems, selectedIndex]);

  useEffect(() => {
    setUndoableArchiveIssueIds((prev) =>
      prev.filter((issueId) => guardedArchiveIssueIds.has(issueId) || unarchivingIssueIds.has(issueId)),
    );
  }, [guardedArchiveIssueIds, unarchivingIssueIds]);

  useEffect(() => {
    setUndoableArchiveIssueIds([]);
    setUnarchivingIssueIds(new Set());
  }, [selectedCompanyId]);

  // Use refs for keyboard handler to avoid stale closures
  const kbStateRef = useRef({
    workItems: groupedSections,
    flatNavItems,
    selectedIndex,
    canArchive: canArchiveFromTab,
    nonInboxSearchIssueIds,
    archivingIssueIds,
    undoableArchiveIssueIds,
    unarchivingIssueIds,
    archivingNonIssueIds,
    fadingOutIssues,
    readItems,
  });
  kbStateRef.current = {
    workItems: groupedSections,
    flatNavItems,
    selectedIndex,
    canArchive: canArchiveFromTab,
    nonInboxSearchIssueIds,
    archivingIssueIds,
    undoableArchiveIssueIds,
    unarchivingIssueIds,
    archivingNonIssueIds,
    fadingOutIssues,
    readItems,
  };

  const kbActionsRef = useRef({
    archiveIssue: (id: string) => archiveIssueMutation.mutate(id),
    undoArchiveIssue: (id: string) => unarchiveIssueMutation.mutate(id),
    archiveNonIssue: handleArchiveNonIssue,
    markRead: (id: string) => markReadMutation.mutate(id),
    markUnreadIssue: (id: string) => markUnreadMutation.mutate(id),
    markNonIssueRead: handleMarkNonIssueRead,
    markNonIssueUnread: markItemUnread,
    setGroupCollapsed,
    setInboxParentCollapsed,
    navigate,
  });
  kbActionsRef.current = {
    archiveIssue: (id: string) => archiveIssueMutation.mutate(id),
    undoArchiveIssue: (id: string) => unarchiveIssueMutation.mutate(id),
    archiveNonIssue: handleArchiveNonIssue,
    markRead: (id: string) => markReadMutation.mutate(id),
    markUnreadIssue: (id: string) => markUnreadMutation.mutate(id),
    markNonIssueRead: handleMarkNonIssueRead,
    markNonIssueUnread: markItemUnread,
    setGroupCollapsed,
    setInboxParentCollapsed,
    navigate,
  };

  // Keyboard shortcuts (mail-client style) — single stable listener using refs
  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.defaultPrevented) return;

      // Don't capture when typing in inputs/textareas or with modifier keys
      const target = e.target;
      if (
        !(target instanceof HTMLElement) ||
        isKeyboardShortcutTextInputTarget(target) ||
        hasBlockingShortcutDialog(document) ||
        e.metaKey ||
        e.ctrlKey ||
        e.altKey
      ) {
        return;
      }

      const st = kbStateRef.current;
      const act = kbActionsRef.current;

      // Navigation works on every tab; archive/undo (and a/y below) stay
      // scoped to the "mine" tab, the only place items are archivable.
      const undoArchiveAction = !st.canArchive ? "none" : resolveInboxUndoArchiveKeyAction({
        hasUndoableArchive: st.undoableArchiveIssueIds.length > 0,
        defaultPrevented: e.defaultPrevented,
        key: e.key,
        metaKey: e.metaKey,
        ctrlKey: e.ctrlKey,
        altKey: e.altKey,
        target,
        hasOpenDialog: hasBlockingShortcutDialog(document),
      });
      if (undoArchiveAction === "undo_archive") {
        const issueId = st.undoableArchiveIssueIds[st.undoableArchiveIssueIds.length - 1];
        if (!issueId || st.unarchivingIssueIds.has(issueId)) return;
        e.preventDefault();
        act.undoArchiveIssue(issueId);
        return;
      }

      const navItems = st.flatNavItems;
      const navCount = navItems.length;
      if (navCount === 0) return;

      // Any inbox keystroke (nav, archive, undo) is engagement: hold the sort.
      noteInboxSortInteraction();

      /** Resolve the nav entry at an index to an issue (for child entries) or work item. */
      const resolveNavEntry = (idx: number): { issue?: Issue; item?: InboxWorkItem } => {
        const entry = navItems[idx];
        if (!entry) return {};
        if (entry.type === "child") return { issue: entry.issue };
        if (entry.type === "top") return { item: entry.item };
        return {};
      };

      // The row a keystroke acts on: the hovered row when the mouse has moved
      // since the last key nav (so "hover a row → press a/r/Enter/Arrow" acts on
      // it), otherwise the keyboard selection. Hover no longer writes selection
      // state, so this is what threads the pointer position into every handler.
      const rawHovered = hoveredIndexRef.current;
      const hoveredIndex = rawHovered != null && rawHovered >= 0 && rawHovered < navCount ? rawHovered : -1;
      const fromHover = pointerMovedSinceKeyNavRef.current && hoveredIndex >= 0;
      const effectiveIndex = fromHover ? hoveredIndex : st.selectedIndex;

      switch (e.key) {
        case "j":
        case "ArrowDown": {
          e.preventDefault();
          pointerMovedSinceKeyNavRef.current = false;
          setSelectedIndex(getInboxKeyboardSelectionIndex(effectiveIndex, navCount, "next"));
          break;
        }
        case "k":
        case "ArrowUp": {
          e.preventDefault();
          pointerMovedSinceKeyNavRef.current = false;
          setSelectedIndex(getInboxKeyboardSelectionIndex(effectiveIndex, navCount, "previous"));
          break;
        }
        case "ArrowLeft":
        case "ArrowRight": {
          if (effectiveIndex < 0 || effectiveIndex >= navCount) return;
          const entry = navItems[effectiveIndex];
          if (!entry) return;
          if (entry.type === "group") {
            e.preventDefault();
            pointerMovedSinceKeyNavRef.current = false;
            setSelectedIndex(effectiveIndex);
            act.setGroupCollapsed(entry.groupKey, e.key === "ArrowLeft");
            break;
          }
          // Parent tasks collapse/expand with the same keys as groups.
          const { issue, item } = resolveNavEntry(effectiveIndex);
          const targetIssue = issue ?? (item?.kind === "issue" ? item.issue : null);
          if (!targetIssue) return;
          const hasChildren = st.workItems.some(
            (group) => (group.childrenByIssueId.get(targetIssue.id)?.length ?? 0) > 0,
          );
          if (!hasChildren) return;
          e.preventDefault();
          pointerMovedSinceKeyNavRef.current = false;
          setSelectedIndex(effectiveIndex);
          act.setInboxParentCollapsed(targetIssue.id, e.key === "ArrowLeft");
          break;
        }
        case "a":
        case "y": {
          if (!st.canArchive) return;
          if (effectiveIndex < 0 || effectiveIndex >= navCount) return;
          e.preventDefault();
          const { issue, item } = resolveNavEntry(effectiveIndex);
          if (issue) {
            if (!st.nonInboxSearchIssueIds.has(issue.id) && !st.archivingIssueIds.has(issue.id)) act.archiveIssue(issue.id);
          } else if (item) {
            if (item.kind === "issue") {
              if (!st.nonInboxSearchIssueIds.has(item.issue.id) && !st.archivingIssueIds.has(item.issue.id)) {
                act.archiveIssue(item.issue.id);
              }
            } else {
              const key = getInboxWorkItemKey(item);
              if (!st.archivingNonIssueIds.has(key)) act.archiveNonIssue(key);
            }
          }
          break;
        }
        case "U": {
          if (!st.canArchive) return;
          if (effectiveIndex < 0 || effectiveIndex >= navCount) return;
          e.preventDefault();
          const { issue, item } = resolveNavEntry(effectiveIndex);
          if (issue) {
            act.markUnreadIssue(issue.id);
          } else if (item) {
            if (item.kind === "issue") act.markUnreadIssue(item.issue.id);
            else act.markNonIssueUnread(getInboxWorkItemKey(item));
          }
          break;
        }
        case "r": {
          if (!st.canArchive) return;
          if (effectiveIndex < 0 || effectiveIndex >= navCount) return;
          e.preventDefault();
          const { issue, item } = resolveNavEntry(effectiveIndex);
          if (issue) {
            if (issue.isUnreadForMe && !st.fadingOutIssues.has(issue.id)) act.markRead(issue.id);
          } else if (item) {
            if (item.kind === "issue") {
              if (item.issue.isUnreadForMe && !st.fadingOutIssues.has(item.issue.id)) act.markRead(item.issue.id);
            } else {
              const key = getInboxWorkItemKey(item);
              if (!st.readItems.has(key)) act.markNonIssueRead(key);
            }
          }
          break;
        }
        case "Enter": {
          if (effectiveIndex < 0 || effectiveIndex >= navCount) return;
          e.preventDefault();
          const { issue, item } = resolveNavEntry(effectiveIndex);
          if (issue) {
            const pathId = issue.identifier ?? issue.id;
            const detailState = armIssueDetailInboxQuickArchive(withIssueDetailHeaderSeed(issueLinkState, issue));
            rememberIssueDetailLocationState(pathId, detailState);
            void prefetchIssueDetailForNavigation(queryClient, pathId, { issue });
            act.navigate(createIssueDetailPath(pathId), { state: detailState });
          } else if (item) {
            if (item.kind === "issue") {
              const pathId = item.issue.identifier ?? item.issue.id;
              const detailState = armIssueDetailInboxQuickArchive(
                withIssueDetailHeaderSeed(issueLinkState, item.issue),
              );
              rememberIssueDetailLocationState(pathId, detailState);
              void prefetchIssueDetailForNavigation(queryClient, pathId, { issue: item.issue });
              act.navigate(createIssueDetailPath(pathId), { state: detailState });
            } else if (item.kind === "approval") {
              act.navigate(`/approvals/${item.approval.id}`);
            } else if (item.kind === "failed_run") {
              act.navigate(`/agents/${item.run.agentId}/runs/${item.run.id}`);
            }
          }
          break;
        }
        default:
          return;
      }
    };
    window.addEventListener("keydown", handleKeyDown);
    return () => window.removeEventListener("keydown", handleKeyDown);
  }, [issueLinkState, noteInboxSortInteraction]);

  // Scroll selected item into view
  useEffect(() => {
    if (selectedIndex < 0 || !listRef.current) return;
    const rows = listRef.current.querySelectorAll("[data-inbox-item]");
    const row = rows[selectedIndex];
    if (row) row.scrollIntoView({ block: "nearest" });
  }, [selectedIndex]);

  if (!selectedCompanyId) {
    return <EmptyState icon={InboxIcon} message={`Select an organization to view ${surfaceLabel.toLowerCase()}.`} />;
  }

  const hasRunFailures = failedRuns.length > 0;
  const showCompanyAlerts = shouldShowCompanyAlerts(tab) && showAlertsCategory;
  const showAggregateAgentError =
    showCompanyAlerts &&
    !!dashboard &&
    dashboard.agents.error > 0 &&
    !hasRunFailures &&
    !dismissedAlerts.has("alert:agent-errors");
  const showBudgetAlert =
    showCompanyAlerts &&
    !!dashboard &&
    dashboard.costs.monthBudgetCents > 0 &&
    dashboard.costs.monthUtilizationPercent >= 80 &&
    !dismissedAlerts.has("alert:budget");
  const hasAlerts = showAggregateAgentError || showBudgetAlert;
  const showWorkItemsSection = totalVisibleWorkItems > 0;
  const showAlertsSection = shouldShowInboxSection({
    tab,
    hasItems: hasAlerts,
    showOnMine: false,
    showOnRecent: false,
    showOnUnread: false,
    showOnAll: hasAlerts,
  });

  const visibleSections = [
    showAlertsSection ? "alerts" : null,
    showWorkItemsSection ? "work_items" : null,
  ].filter((key): key is SectionKey => key !== null);

  const allLoaded =
    !isJoinRequestsLoading &&
    !isApprovalsLoading &&
    !isDashboardLoading &&
    !isIssuesLoading &&
    !isMineIssuesLoading &&
    !isTouchedIssuesLoading &&
    !isRunsLoading;

  const showSeparatorBefore = (key: SectionKey) => visibleSections.indexOf(key) > 0;
  const markAllReadIssues = (tab === "mine" ? visibleMineIssues : unreadTouchedIssues)
    .filter((issue) => issue.isUnreadForMe && !fadingOutIssues.has(issue.id) && !archivingIssueIds.has(issue.id));
  const unreadIssueIds = markAllReadIssues
    .map((issue) => issue.id);
  const canMarkAllRead = unreadIssueIds.length > 0;
  const activeIssueFilterCount = countActiveIssueFilters(issueFilters, true);
  const activeInboxScopeFilterCount = tab === "all"
    ? Number(allCategoryFilter !== "everything")
      + Number(showApprovalsCategory && allApprovalFilter !== "all")
    : 0;
  const activeFilterCount = activeIssueFilterCount + activeInboxScopeFilterCount;
  const showGeneralIssueToolbarControls = tab !== "blocked";
  const activeStatusFilterApplied =
    issueFilters.statuses.length === 4
    && ["todo", "in_progress", "in_review", "blocked"].every((status) =>
      issueFilters.statuses.includes(status as IssueFilterState["statuses"][number]),
    );
  const issueFilterFeedback = issueFilters.liveOnly
    ? "Live runs only — tasks currently connected to an agent run."
    : activeStatusFilterApplied
      ? "Active statuses — open tasks, whether or not an agent is running."
      : null;
  return (
    <div className="space-y-6">
      <InboxCollectionToolbar
        streamlined={streamlinedUiEnabled}
        ariaLabel={`${surfaceLabel} controls`}
        context={toolbarContext ?? (
          <Tabs value={tab} onValueChange={(value) => navigate(`/inbox/${value}`)}>
            <PageTabBar
              items={[
                { value: "mine", label: "Mine" },
                { value: "recent", label: "Recent" },
                { value: "unread", label: "Unread" },
                { value: "blocked", label: "Blocked" },
                { value: "all", label: "All" },
              ]}
            />
          </Tabs>
        )}
        search={(
          <div className="relative ml-auto w-full sm:w-(--sz-220px)">
            <Search className="pointer-events-none absolute left-2.5 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-muted-foreground" />
            <Input
              type="search"
              placeholder={`Search ${surfaceLabel.toLowerCase()}…`}
              value={searchQuery}
              onChange={(e) => setSearchQuery(e.target.value)}
              onKeyDown={(e) => {
                if (shouldBlurPageSearchOnEnter({
                  key: e.key,
                  isComposing: e.nativeEvent.isComposing,
                })) {
                  e.currentTarget.blur();
                  return;
                }

                if (shouldBlurPageSearchOnEscape({
                  key: e.key,
                  isComposing: e.nativeEvent.isComposing,
                  currentValue: e.currentTarget.value,
                })) {
                  e.currentTarget.blur();
                }
              }}
              className="h-8 w-full pl-8 text-xs"
              data-page-search-target="true"
            />
          </div>
        )}
        controls={(
          <>
          {tab === "blocked" ? (
            <>
              <IssueFiltersPopover
                state={issueFilters}
                onChange={updateIssueFilters}
                activeFilterCount={activeIssueFilterCount}
                agents={agents}
                creators={creatorOptions}
                projects={projects?.map((project) => ({ id: project.id, name: project.name }))}
                labels={labels?.map((label) => ({ id: label.id, name: label.name, color: label.color }))}
                currentUserId={currentUserId}
                enableExternalObjectFilters={externalObjectsEnabled}
                enableRoutineVisibilityFilter
                buttonVariant="outline"
                iconOnly
                presentation={streamlinedUiEnabled ? "streamlined" : "legacy"}
              />
              <Popover>
                <PopoverTrigger asChild>
                  <Button
                    type="button"
                    variant="outline"
                    size="icon"
                    className={cn("h-8 w-8 shrink-0", blockedGroupBy !== "none" && "bg-accent")}
                    title="Group"
                  >
                    <Layers className="h-3.5 w-3.5" />
                  </Button>
                </PopoverTrigger>
                <PopoverContent align="end" className="w-44 p-0">
                  <div className="space-y-0.5 p-2">
                    {BLOCKED_GROUP_OPTIONS.map(([value, label]) => (
                      <button
                        key={value}
                        type="button"
                        className={cn(
                          "flex w-full items-center justify-between rounded-sm px-2 py-1.5 text-sm",
                          blockedGroupBy === value ? "bg-accent/50 text-foreground" : "text-muted-foreground hover:bg-accent/50",
                        )}
                        onClick={() => setBlockedGroupBy(value)}
                      >
                        <span>{label}</span>
                        {blockedGroupBy === value ? <Check className="h-3.5 w-3.5" /> : null}
                      </button>
                    ))}
                  </div>
                </PopoverContent>
              </Popover>
              <IssueColumnPicker
                availableColumns={availableIssueColumns}
                visibleColumnSet={visibleIssueColumnSet}
                onToggleColumn={toggleIssueColumn}
                showDateGroupSeparators={filterPreferences.showDateGroupSeparators}
                onToggleDateGroupSeparators={(enabled) => {
                  updateFilterPreferences((previous) => ({
                    ...previous,
                    showDateGroupSeparators: enabled,
                  }));
                }}
                onResetColumns={() => setIssueColumns(DEFAULT_INBOX_ISSUE_COLUMNS)}
                title="Choose which columns stay visible"
                iconOnly
              />
              <Popover>
                <PopoverTrigger asChild>
                  <Button
                    type="button"
                    variant="outline"
                    size="icon"
                    className="h-8 w-8 shrink-0"
                    title="Sort"
                  >
                    <ArrowUpDown className="h-3.5 w-3.5" />
                  </Button>
                </PopoverTrigger>
                <PopoverContent align="end" className="w-48 p-0">
                  <div className="space-y-0.5 p-2">
                    {BLOCKED_SORT_OPTIONS.map(([value, label]) => (
                      <button
                        key={value}
                        type="button"
                        className={cn(
                          "flex w-full items-center justify-between rounded-sm px-2 py-1.5 text-sm",
                          blockedSortBy === value ? "bg-accent/50 text-foreground" : "text-muted-foreground hover:bg-accent/50",
                        )}
                        onClick={() => setBlockedSortBy(value)}
                      >
                        <span>{label}</span>
                        {blockedSortBy === value ? <Check className="h-3.5 w-3.5" /> : null}
                      </button>
                    ))}
                  </div>
                </PopoverContent>
              </Popover>
            </>
          ) : showGeneralIssueToolbarControls ? (
            <>
              <Button
                type="button"
                variant="outline"
                size="icon"
                className={cn("hidden h-8 w-8 shrink-0 sm:inline-flex", nestingEnabled && "bg-accent")}
                onClick={toggleNesting}
                title={nestingEnabled ? "Disable parent-child nesting" : "Enable parent-child nesting"}
              >
                <ListTree className="h-3.5 w-3.5" />
              </Button>
              <IssueFiltersPopover
                state={issueFilters}
                onChange={updateIssueFilters}
                activeFilterCount={activeFilterCount}
                agents={agents}
                creators={creatorOptions}
                projects={projects?.map((project) => ({ id: project.id, name: project.name }))}
                labels={labels?.map((label) => ({ id: label.id, name: label.name, color: label.color }))}
                currentUserId={currentUserId}
                enableExternalObjectFilters={externalObjectsEnabled}
                enableRoutineVisibilityFilter
                buttonVariant="outline"
                iconOnly
                presentation={streamlinedUiEnabled ? "streamlined" : "legacy"}
                inboxScopeFilters={tab === "all" ? {
                  category: allCategoryFilter,
                  approvalStatus: allApprovalFilter,
                  showApprovalStatus: showApprovalsCategory,
                  onCategoryChange: updateAllCategoryFilter,
                  onApprovalStatusChange: updateAllApprovalFilter,
                  onClear: () => {
                    updateFilterPreferences((previous) => ({
                      ...previous,
                      allCategoryFilter: "everything",
                      allApprovalFilter: "all",
                    }));
                  },
                } : undefined}
              />
              <Popover>
                <PopoverTrigger asChild>
                  <Button
                    type="button"
                    variant="outline"
                    size="icon"
                    className={cn("h-8 w-8 shrink-0", groupBy !== "none" && "bg-accent")}
                    title="Group"
                  >
                    <Layers className="h-3.5 w-3.5" />
                  </Button>
                </PopoverTrigger>
                <PopoverContent align="end" className="w-40 p-2">
                  <div className="space-y-0.5">
                    {([
                      ["none", "None"],
                      ["type", "Type"],
                      ["assignee", "Responsible"],
                      ["project", "Project"],
                      ...(isolatedWorkspacesEnabled ? ([["workspace", "Workspace"]] as const) : []),
                    ] as const).map(([value, label]) => (
                      <button
                        key={value}
                        type="button"
                        className={cn(
                          "flex w-full items-center justify-between rounded-sm px-2 py-1.5 text-sm",
                          groupBy === value ? "bg-accent/50 text-foreground" : "text-muted-foreground hover:bg-accent/50",
                        )}
                        onClick={() => updateGroupBy(value)}
                      >
                        <span>{label}</span>
                        {groupBy === value ? <Check className="h-3.5 w-3.5" /> : null}
                      </button>
                    ))}
                  </div>
                </PopoverContent>
              </Popover>
              <IssueColumnPicker
                availableColumns={availableIssueColumns}
                visibleColumnSet={visibleIssueColumnSet}
                onToggleColumn={toggleIssueColumn}
                showDateGroupSeparators={filterPreferences.showDateGroupSeparators}
                onToggleDateGroupSeparators={(enabled) => {
                  updateFilterPreferences((previous) => ({
                    ...previous,
                    showDateGroupSeparators: enabled,
                  }));
                }}
                onResetColumns={() => setIssueColumns(DEFAULT_INBOX_ISSUE_COLUMNS)}
                title="Choose which columns stay visible"
                iconOnly
                rowPresentation={streamlinedUiEnabled ? "task" : "legacy"}
              />
              {canMarkAllRead && (
                <>
                  <Button
                    type="button"
                    variant="outline"
                    size="sm"
                    className="h-8 shrink-0"
                    onClick={() => setShowMarkAllReadConfirm(true)}
                    disabled={markAllReadMutation.isPending}
                  >
                    {markAllReadMutation.isPending ? "Marking…" : "Mark all as read"}
                  </Button>
                  <Dialog open={showMarkAllReadConfirm} onOpenChange={setShowMarkAllReadConfirm}>
                    <DialogContent className="sm:max-w-md">
                      <DialogHeader>
                        <DialogTitle>Mark all as read?</DialogTitle>
                        <DialogDescription>
                          This will mark {unreadIssueIds.length} unread {unreadIssueIds.length === 1 ? "item" : "items"} as read.
                        </DialogDescription>
                      </DialogHeader>
                      <DialogFooter>
                        <Button variant="outline" onClick={() => setShowMarkAllReadConfirm(false)}>
                          Cancel
                        </Button>
                        <Button
                          onClick={() => {
                            setShowMarkAllReadConfirm(false);
                            markAllReadMutation.mutate(unreadIssueIds);
                          }}
                        >
                          Mark all as read
                        </Button>
                      </DialogFooter>
                    </DialogContent>
                  </Dialog>
                </>
              )}
            </>
          ) : null}
          </>
        )}
        feedback={issueFilterFeedback ? (
          <p className="text-xs text-muted-foreground" data-testid="inbox-filter-scope-feedback">
            {issueFilterFeedback}
          </p>
        ) : null}
      />

      {approvalsError && <p className="text-sm text-destructive">{approvalsError.message}</p>}
      {actionError && <p className="text-sm text-destructive">{actionError}</p>}

      {tab === "blocked" ? (
        <div className="-mx-2 sm:mx-0">
        <BlockedInboxView
          companyId={selectedCompanyId!}
          searchQuery={searchQuery}
          agentNameById={agentById} agents={agents}
          userLabelById={companyUserLabelMap}
          issueLinkState={issueLinkState}
          groupBy={blockedGroupBy}
          sortBy={blockedSortBy}
          issueFilters={issueFilters}
          currentUserId={currentUserId}
          liveIssueIds={liveIssueIds}
          subtreeLiveCounts={subtreeLiveCounts}
          workspaceFilterContext={inboxWorkspaceGrouping}
          showStatusColumn={visibleIssueColumnSet.has("status") && availableIssueColumnSet.has("status")}
          showIdentifierColumn={visibleIssueColumnSet.has("id") && availableIssueColumnSet.has("id")}
          showUpdatedColumn={visibleIssueColumnSet.has("updated") && availableIssueColumnSet.has("updated")}
          presentation={streamlinedUiEnabled ? "task" : "legacy"}
        />
        </div>
      ) : null}

      {tab !== "blocked" && !allLoaded && visibleSections.length === 0 && (
        <PageSkeleton variant="inbox" />
      )}

      {tab !== "blocked" && allLoaded && visibleSections.length === 0 && (
        <EmptyState
          icon={searchQuery.trim() ? Search : InboxIcon}
          message={
            searchQuery.trim()
              ? "No inbox items match your search."
              : tab === "mine"
              ? "Inbox zero."
              : tab === "unread"
              ? "No new inbox items."
              : tab === "recent"
                ? "No recent inbox items."
                : "No inbox items match these filters."
          }
        />
      )}

      {tab !== "blocked" && showWorkItemsSection && (
        <>
          {showSeparatorBefore("work_items") && <Separator />}
          <div>
            <div
              ref={listRef}
              className="-mx-2 overflow-hidden sm:mx-0"
              onPointerDownCapture={noteInboxSortInteraction}
              onWheelCapture={noteInboxSortInteraction}
            >
              {(() => {
                const renderInboxIssue = ({
                  issue,
                  depth,
                  selected,
                  hasChildren = false,
                  isExpanded = false,
                  childCount = 0,
                  collapseParentId = null,
                  allowArchive = canArchiveFromTab,
                }: {
                  issue: Issue;
                  depth: number;
                  selected: boolean;
                  hasChildren?: boolean;
                  isExpanded?: boolean;
                  childCount?: number;
                  collapseParentId?: string | null;
                  allowArchive?: boolean;
                }) => {
                  const isUnread = issue.isUnreadForMe && !fadingOutIssues.has(issue.id);
                  const isFading = fadingOutIssues.has(issue.id);
                  const isArchiving = archivingIssueIds.has(issue.id);
                  const project = issue.projectId ? projectById.get(issue.projectId) ?? null : null;
                  const assigneeUserProfile = issue.assigneeUserId
                    ? companyUserProfileMap.get(issue.assigneeUserId) ?? null
                    : null;
                  const originatingActor = deriveOriginatingActor(issue);
                  const originatingUserId = originatingActor?.kind === "user" ? originatingActor.id : null;
                  const originatingViaAgentId =
                    originatingActor?.kind === "user" ? originatingActor.viaAgentId ?? null : null;
                  const isLive = liveIssueIds.has(issue.id);
                  const loadedSubtreeLiveCount = subtreeLiveCounts.get(issue.id) ?? 0;
                  const liveDescendantCount = resolveIssueLiveDescendantCount(issue, loadedSubtreeLiveCount);
                  const blockerAttention = resolveInboxIssueBlockerAttention(issue, {
                    isLive,
                    loadedSubtreeLiveCount,
                  });
                  const showStatus = visibleIssueColumnSet.has("status") && availableIssueColumnSet.has("status");
                  const showSubtreeLiveChip = !(
                    showStatus
                    && issue.status === "blocked"
                    && blockerAttention?.state === "covered"
                  );
                  const rowStatusIcon = (
                    <StatusIcon status={issue.status} externalConversationState={issue.externalConversationState} blockerAttention={blockerAttention} size="md" />
                  );
                  return (
                    <IssueRow
                      key={`issue:${issue.id}`}
                      issue={issue}
                      presentation={streamlinedUiEnabled ? "task" : "legacy"}
                      issueLinkState={issueLinkState}
                      treeGuides={depth}
                      chevronInGuide={streamlinedUiEnabled && depth > 0 && hasChildren}
                      selected={selected}
                      className={
                        isArchiving
                          ? "pointer-events-none -translate-x-4 scale-(--s-0_98) opacity-0 transition-all duration-200 ease-out"
                          : "transition-all duration-200 ease-out"
                      }
                      leadingControl={streamlinedUiEnabled && nestingEnabled && hasChildren && collapseParentId ? (
                        <button
                          type="button"
                          data-slot="icon-button"
                          className="inline-flex h-4 w-4 shrink-0 items-center justify-center"
                          aria-label={isExpanded ? "Collapse sub-tasks" : "Expand sub-tasks"}
                          onClick={(event) => {
                            event.preventDefault();
                            event.stopPropagation();
                            toggleInboxParentCollapse(collapseParentId);
                          }}
                        >
                          <ChevronRight className={cn("h-3.5 w-3.5 transition-transform", isExpanded && "rotate-90")} />
                        </button>
                      ) : streamlinedUiEnabled ? (
                        <span data-slot="task-row-disclosure-spacer" className={cn("h-4 w-4 shrink-0", !nestingEnabled && "hidden sm:block")} aria-hidden="true" />
                      ) : undefined}
                      statusSlot={streamlinedUiEnabled ? rowStatusIcon : undefined}
                      metadata={streamlinedUiEnabled ? (
                        <InboxIssueMetaLeading
                          issue={issue}
                          isLive={isLive}
                          subtreeLiveCount={liveDescendantCount}
                          showSubtreeLiveChip={showSubtreeLiveChip}
                          showStatus={false}
                          showIdentifier={false}
                        />
                      ) : undefined}
                      showIdentifier={streamlinedUiEnabled
                        ? visibleIssueColumnSet.has("id") && availableIssueColumnSet.has("id")
                        : undefined}
                      desktopMetaLeading={!streamlinedUiEnabled ? (
                        <>
                          {nestingEnabled ? (
                            depth === 0 && hasChildren && collapseParentId ? (
                              <button
                                type="button"
                                data-slot="icon-button"
                                className="hidden w-4 shrink-0 items-center justify-center sm:inline-flex"
                                onClick={(event) => {
                                  event.preventDefault();
                                  event.stopPropagation();
                                  toggleInboxParentCollapse(collapseParentId);
                                }}
                              >
                                <ChevronRight className={cn("h-3.5 w-3.5 transition-transform", isExpanded && "rotate-90")} />
                              </button>
                            ) : (
                              <span className="hidden w-4 shrink-0 sm:block" />
                            )
                          ) : null}
                          <InboxIssueMetaLeading
                            issue={issue}
                            isLive={isLive}
                            subtreeLiveCount={liveDescendantCount}
                            showSubtreeLiveChip={showSubtreeLiveChip}
                            showStatus={showStatus}
                            showIdentifier={visibleIssueColumnSet.has("id") && availableIssueColumnSet.has("id")}
                            statusSlot={rowStatusIcon}
                          />
                        </>
                      ) : undefined}
                      titleSuffix={hasChildren && !isExpanded ? (
                        <span className="ml-1.5 text-xs text-muted-foreground">
                          ({childCount} sub-task{childCount !== 1 ? "s" : ""})
                        </span>
                      ) : undefined}
                      mobileTitleMeta={streamlinedUiEnabled ? issueActivityTimestamp(issue) : undefined}
                      mobileMeta={streamlinedUiEnabled ? undefined : issueActivityText(issue).toLowerCase()}
                      mobileLeading={!streamlinedUiEnabled ? (
                        depth === 0 && hasChildren && collapseParentId ? (
                          <button
                            type="button"
                            data-slot="icon-button"
                            onClick={(event) => {
                              event.preventDefault();
                              event.stopPropagation();
                              toggleInboxParentCollapse(collapseParentId);
                            }}
                          >
                            <ChevronRight className={cn("h-3.5 w-3.5 transition-transform", isExpanded && "rotate-90")} />
                          </button>
                        ) : (
                          <StatusIcon status={issue.status} externalConversationState={issue.externalConversationState} blockerAttention={blockerAttention} size="md" />
                        )
                      ) : undefined}
                      unreadState={isUnread ? "visible" : isFading ? "fading" : "hidden"}
                      onMarkRead={() => markReadMutation.mutate(issue.id)}
                      onArchive={allowArchive ? () => archiveIssueMutation.mutate(issue.id) : undefined}
                      archiveDisabled={isArchiving}
                      desktopTrailing={
                        (streamlinedUiEnabled ? visibleTaskDataColumns : visibleTrailingIssueColumns).length > 0 ? (
                          <InboxIssueTrailingColumns
                            issue={issue}
                            columns={streamlinedUiEnabled ? visibleTaskDataColumns : visibleTrailingIssueColumns}
                            projectName={project?.name ?? null}
                            projectColor={project?.color ?? null}
                            workspaceName={resolveIssueWorkspaceName(issue, {
                              executionWorkspaceById,
                              projectWorkspaceById,
                              defaultProjectWorkspaceIdByProjectId,
                            })}
                            assigneeName={agentName(issue.assigneeAgentId)}
                            assigneeAgent={agents?.find((agent) => agent.id === issue.assigneeAgentId)}
                            creatorAgent={agents?.find((agent) => agent.id === issue.createdByAgentId)}
                            assigneeUserName={
                              formatAssigneeUserLabel(issue.assigneeUserId, currentUserId, companyUserLabelMap)
                              ?? assigneeUserProfile?.label
                              ?? null
                            }
                            assigneeUserAvatarUrl={assigneeUserProfile?.image ?? null}
                            creatorAgentName={agentName(issue.createdByAgentId)}
                            creatorUserName={originatingUserId ? (companyUserProfileMap.get(originatingUserId)?.label ?? null) : null}
                            creatorUserAvatarUrl={originatingUserId ? (companyUserProfileMap.get(originatingUserId)?.image ?? null) : null}
                            viaAgentName={originatingViaAgentId ? agentName(originatingViaAgentId) : null}
                            currentUserId={currentUserId}
                            parentIdentifier={issue.parentId ? (issueById.get(issue.parentId)?.identifier ?? null) : null}
                            parentTitle={issue.parentId ? (issueById.get(issue.parentId)?.title ?? null) : null}
                          />
                        ) : undefined
                      }
                      trailingMeta={streamlinedUiEnabled && showTaskTimestamp ? issueActivityTimestamp(issue) : null}
                    />
                  );
                };

                let previousDateGroup: TaskDateGroup | null = null;
                let previousTimestamp = Number.POSITIVE_INFINITY;
                const legacyTodayCutoff = Date.now() - 24 * 60 * 60 * 1000;
                return groupedSections.flatMap((group, groupIndex) => {
                  const elements: ReactNode[] = [];
                  const isGroupCollapsed = collapsedGroupKeys.has(group.key);
                  if (
                    group.searchSection !== "none"
                    && group.searchSection !== groupedSections[groupIndex - 1]?.searchSection
                  ) {
                    elements.push(
                      <div
                        key={`${group.searchSection}-search-divider`}
                        className="flex items-center gap-3 border-y border-border/70 bg-muted/30 px-4 py-2"
                      >
                        <div className="h-px flex-1 bg-border/80" />
                        <span className="shrink-0 text-(length:--text-micro) font-semibold uppercase tracking-wide text-muted-foreground">
                          {group.searchSection === "archived" ? "Archived" : "Other results"}
                        </span>
                        <div className="h-px flex-1 bg-border/80" />
                      </div>,
                    );
                  }
                  if (group.label) {
                    const groupNavIdx = groupFlatIndex.get(group.key) ?? -1;
                    const isGroupSelected = groupNavIdx >= 0 && selectedIndex === groupNavIdx;
                    const canCreateIssueInGroup = group.displayItems.some((item) => item.kind === "issue");
                    elements.push(
                      <div
                        key={`group-${group.key}`}
                        data-inbox-item
                        className={cn(groupIndex > 0 && "pt-2")}
                        onClick={() => {
                          if (groupNavIdx >= 0) setSelectedIndex(groupNavIdx);
                        }}
                        onMouseEnter={() => {
                          if (groupNavIdx >= 0) setSelectedIndexFromPointer(groupNavIdx);
                        }}
                      >
                        {/* Left inset aligns the header chevron with the nested
                            task chevrons. Read rows no longer reserve a
                            mark-read column, so inbox rows sit at pl-1 before
                            their chevron — same as the tasks list. */}
                        <div className={cn("rounded-lg px-3 sm:pl-0 sm:pr-4", isGroupSelected ? "bg-accent/50" : "hover:bg-accent/50")}>
                        <IssueGroupHeader
                          label={group.label}
                          collapsible
                          collapsed={isGroupCollapsed}
                          onToggle={() => toggleGroupCollapse(group.key)}
                          trailing={canCreateIssueInGroup ? (
                            <Button
                              variant="ghost"
                              size="icon-xs"
                              className="-mr-2 text-muted-foreground"
                              title={`New task in ${group.label}`}
                              aria-label={`New task in ${group.label}`}
                              onClick={(event) => {
                                event.stopPropagation();
                                openCreateIssueForGroup(group);
                              }}
                            >
                              <Plus className="h-3 w-3" />
                            </Button>
                          ) : null}
                        />
                        </div>
                      </div>,
                    );
                  }
                  if (isGroupCollapsed) return elements;

                  for (let index = 0; index < group.displayItems.length; index += 1) {
                    const item = group.displayItems[index]!;
                    const navIdx = topFlatIndex.get(`${group.key}:${getInboxWorkItemKey(item)}`) ?? 0;
                    const wrapItem = (key: string, isSelected: boolean, child: ReactNode) => (
                      <div
                        key={`sel-${key}`}
                        data-inbox-item
                        className="relative"
                        onClick={() => setSelectedIndex(navIdx)}
                        onMouseEnter={() => setSelectedIndexFromPointer(navIdx)}
                      >
                        {child}
                      </div>
                    );
                    const currentDateGroup = taskDateGroup(item.timestamp);
                    const dateGroupLabel = streamlinedUiEnabled
                      && filterPreferences.showDateGroupSeparators
                      && groupBy === "none"
                      ? taskDateGroupSeparator(previousDateGroup, currentDateGroup)
                      : null;
                    previousDateGroup = currentDateGroup;
                    const showLegacyEarlierDivider = !streamlinedUiEnabled
                      && groupBy === "none"
                      && item.timestamp > 0
                      && item.timestamp < legacyTodayCutoff
                      && previousTimestamp >= legacyTodayCutoff;
                    previousTimestamp = item.timestamp > 0 ? item.timestamp : previousTimestamp;
                    if (dateGroupLabel) {
                      elements.push(
                        <div
                          key={`date-divider-${group.key}-${currentDateGroup}-${index}`}
                          className="flex items-center gap-3 px-3 py-1.5 sm:pl-0 sm:pr-4"
                          data-testid="inbox-date-group"
                          role="separator"
                          aria-label={dateGroupLabel}
                        >
                          <span className="h-px min-w-0 flex-1 bg-border/80" aria-hidden="true" data-date-group-rule="" />
                          <span
                            className="shrink-0 text-(length:--text-nano) font-medium uppercase tracking-wider text-muted-foreground/70"
                            data-date-group-label=""
                          >
                            {dateGroupLabel}
                          </span>
                          <span className="h-px min-w-0 flex-1 bg-border/80" aria-hidden="true" data-date-group-rule="" />
                        </div>,
                      );
                    } else if (showLegacyEarlierDivider) {
                      elements.push(
                        <div key={`earlier-divider-${group.key}-${index}`} className="my-2 flex items-center gap-3 px-4">
                          <div className="flex-1 border-t border-border" />
                          <span
                            className="shrink-0 text-(length:--text-micro) font-medium uppercase tracking-wider text-muted-foreground/70"
                            data-date-group-label=""
                          >
                            Earlier
                          </span>
                        </div>,
                      );
                    }
                    const isSelected = selectedIndex === navIdx;

                    if (item.kind === "approval") {
                      const approvalKey = `approval:${item.approval.id}`;
                      const isArchiving = archivingNonIssueIds.has(approvalKey);
                      const row = (
                        <ApprovalInboxRow
                          key={approvalKey}
                          approval={item.approval}
                          selected={isSelected}
                          requesterName={agentName(item.approval.requestedByAgentId)}
                          onApprove={() => approveMutation.mutate(item.approval.id)}
                          onReject={() => rejectMutation.mutate(item.approval.id)}
                          isPending={approveMutation.isPending || rejectMutation.isPending}
                          unreadState={nonIssueUnreadState(approvalKey)}
                          onMarkRead={() => handleMarkNonIssueRead(approvalKey)}
                          onArchive={canArchiveFromTab ? () => handleArchiveNonIssue(approvalKey) : undefined}
                          archiveDisabled={isArchiving}
                          className={
                            isArchiving
                              ? "pointer-events-none -translate-x-4 scale-(--s-0_98) opacity-0 transition-all duration-200 ease-out"
                              : "transition-all duration-200 ease-out"
                          }
                        />
                      );
                      elements.push(wrapItem(approvalKey, isSelected, canArchiveFromTab ? (
                        <SwipeToArchive
                          key={approvalKey}
                          selected={isSelected}
                          disabled={isArchiving}
                          onArchive={() => handleArchiveNonIssue(approvalKey)}
                        >
                          {row}
                        </SwipeToArchive>
                      ) : <InboxRowSurface selected={isSelected}>{row}</InboxRowSurface>));
                      continue;
                    }

                    if (item.kind === "failed_run") {
                      const runKey = `run:${item.run.id}`;
                      const isArchiving = archivingNonIssueIds.has(runKey);
                      const row = (
                        <FailedRunInboxRow
                          key={runKey}
                          run={item.run}
                          selected={isSelected}
                          issueById={issueById}
                          agentName={agentName(item.run.agentId)}
                          issueLinkState={issueLinkState}
                          onDismiss={() => dismissInboxItem(runKey)}
                          onRetry={() => retryRunMutation.mutate(item.run)}
                          isRetrying={retryingRunIds.has(item.run.id)}
                          unreadState={nonIssueUnreadState(runKey)}
                          onMarkRead={() => handleMarkNonIssueRead(runKey)}
                          onArchive={canArchiveFromTab ? () => handleArchiveNonIssue(runKey) : undefined}
                          archiveDisabled={isArchiving}
                          className={
                            isArchiving
                              ? "pointer-events-none -translate-x-4 scale-(--s-0_98) opacity-0 transition-all duration-200 ease-out"
                              : "transition-all duration-200 ease-out"
                          }
                        />
                      );
                      elements.push(wrapItem(runKey, isSelected, canArchiveFromTab ? (
                        <SwipeToArchive
                          key={runKey}
                          selected={isSelected}
                          disabled={isArchiving}
                          onArchive={() => handleArchiveNonIssue(runKey)}
                        >
                          {row}
                        </SwipeToArchive>
                      ) : <InboxRowSurface selected={isSelected}>{row}</InboxRowSurface>));
                      continue;
                    }

                    if (item.kind === "join_request") {
                      const joinKey = `join:${item.joinRequest.id}`;
                      const isArchiving = archivingNonIssueIds.has(joinKey);
                      const row = (
                        <JoinRequestInboxRow
                          key={joinKey}
                          joinRequest={item.joinRequest}
                          selected={isSelected}
                          onApprove={() => approveJoinMutation.mutate(item.joinRequest)}
                          onReject={() => rejectJoinMutation.mutate(item.joinRequest)}
                          isPending={approveJoinMutation.isPending || rejectJoinMutation.isPending}
                          unreadState={nonIssueUnreadState(joinKey)}
                          onMarkRead={() => handleMarkNonIssueRead(joinKey)}
                          onArchive={canArchiveFromTab ? () => handleArchiveNonIssue(joinKey) : undefined}
                          archiveDisabled={isArchiving}
                          className={
                            isArchiving
                              ? "pointer-events-none -translate-x-4 scale-(--s-0_98) opacity-0 transition-all duration-200 ease-out"
                              : "transition-all duration-200 ease-out"
                          }
                        />
                      );
                      elements.push(wrapItem(joinKey, isSelected, canArchiveFromTab ? (
                        <SwipeToArchive
                          key={joinKey}
                          selected={isSelected}
                          disabled={isArchiving}
                          onArchive={() => handleArchiveNonIssue(joinKey)}
                        >
                          {row}
                        </SwipeToArchive>
                      ) : <InboxRowSurface selected={isSelected}>{row}</InboxRowSurface>));
                      continue;
                    }

                    const issue = item.issue;
                    const childIssues = group.childrenByIssueId.get(issue.id) ?? [];
                    const hasChildren = childIssues.length > 0;
                    const isExpanded = hasChildren && !collapsedInboxParents.has(issue.id);
                    const canArchiveIssue = canArchiveFromTab && group.searchSection === "none";
                    const renderChildIssueRows = (
                      children: Issue[],
                      depth: number,
                      seen: ReadonlySet<string>,
                    ): ReactNode[] =>
                      children.flatMap((child) => {
                        if (seen.has(child.id)) return [];
                        const nextSeen = new Set(seen);
                        nextSeen.add(child.id);
                        const childNavIdx = childFlatIndex.get(child.id) ?? -1;
                        const isChildSelected = selectedIndex === childNavIdx;
                        const grandchildIssues = group.childrenByIssueId.get(child.id) ?? [];
                        const childHasChildren = grandchildIssues.length > 0;
                        const childIsExpanded = childHasChildren && !collapsedInboxParents.has(child.id);
                        const childRow = renderInboxIssue({
                          issue: child,
                          depth,
                          selected: isChildSelected,
                          hasChildren: childHasChildren,
                          isExpanded: childIsExpanded,
                          childCount: grandchildIssues.length,
                          collapseParentId: child.id,
                          allowArchive: canArchiveIssue,
                        });
                        const isChildArchiving = archivingIssueIds.has(child.id);
                        const row = (
                          <div
                            key={`sel-issue:${child.id}`}
                            data-inbox-item
                            className="relative"
                            onClick={() => {
                              if (childNavIdx >= 0) setSelectedIndex(childNavIdx);
                            }}
                            onMouseEnter={() => {
                              if (childNavIdx >= 0) setSelectedIndexFromPointer(childNavIdx);
                            }}
                          >
                            {canArchiveIssue ? (
                              <SwipeToArchive
                                key={`issue:${child.id}`}
                                selected={isChildSelected}
                                disabled={isChildArchiving}
                                onArchive={() => archiveIssueMutation.mutate(child.id)}
                              >
                                {childRow}
                              </SwipeToArchive>
                            ) : <InboxRowSurface selected={isChildSelected}>{childRow}</InboxRowSurface>}
                          </div>
                        );

                        return childIsExpanded
                          ? [row, ...renderChildIssueRows(grandchildIssues, depth + 1, nextSeen)]
                          : [row];
                      });
                    const parentRow = renderInboxIssue({
                      issue,
                      depth: 0,
                      selected: isSelected,
                      hasChildren,
                      isExpanded,
                      childCount: childIssues.length,
                      collapseParentId: issue.id,
                      allowArchive: canArchiveIssue,
                    });

                    elements.push(wrapItem(`issue:${issue.id}`, isSelected, canArchiveIssue ? (
                      <SwipeToArchive
                        key={`issue:${issue.id}`}
                        selected={isSelected}
                        disabled={archivingIssueIds.has(issue.id)}
                        onArchive={() => archiveIssueMutation.mutate(issue.id)}
                      >
                        {parentRow}
                      </SwipeToArchive>
                    ) : <InboxRowSurface selected={isSelected}>{parentRow}</InboxRowSurface>));

                    if (isExpanded) {
                      elements.push(...renderChildIssueRows(childIssues, 1, new Set([issue.id])));
                    }
                  }

                  return elements;
                });
              })()}
            </div>
          </div>
        </>
      )}

      {showAlertsSection && (
        <>
          {showSeparatorBefore("alerts") && <Separator />}
          <div>
            <h3 className="mb-3 text-sm font-semibold uppercase tracking-wide text-muted-foreground">
              Alerts
            </h3>
            <div className="divide-y divide-border border border-border">
              {showAggregateAgentError && (
                <div className="group/alert relative flex items-center gap-3 px-4 py-3 transition-colors hover:bg-accent/50">
                  <Link
                    to="/agents"
                    className="flex flex-1 cursor-pointer items-center gap-3 no-underline text-inherit"
                  >
                    <AlertTriangle className="h-4 w-4 shrink-0 text-red-600 dark:text-red-400" />
                    <span className="text-sm">
                      <span className="font-medium">{dashboard!.agents.error}</span>{" "}
                      {dashboard!.agents.error === 1 ? "agent has" : "agents have"} errors
                    </span>
                  </Link>
                  <button
                    type="button"
                    onClick={() => dismissAlert("alert:agent-errors")}
                    className="rounded-md p-1 text-muted-foreground opacity-0 transition-opacity hover:bg-accent hover:text-foreground group-hover/alert:opacity-100"
                    aria-label="Dismiss"
                  >
                    <X className="h-3.5 w-3.5" />
                  </button>
                </div>
              )}
              {showBudgetAlert && (
                <div className="group/alert relative flex items-center gap-3 px-4 py-3 transition-colors hover:bg-accent/50">
                  <Link
                    to="/costs"
                    className="flex flex-1 cursor-pointer items-center gap-3 no-underline text-inherit"
                  >
                    <AlertTriangle className="h-4 w-4 shrink-0 text-yellow-400" />
                    <span className="text-sm">
                      Budget at{" "}
                      <span className="font-medium">{dashboard!.costs.monthUtilizationPercent}%</span>{" "}
                      utilization this month
                    </span>
                  </Link>
                  <button
                    type="button"
                    onClick={() => dismissAlert("alert:budget")}
                    className="rounded-md p-1 text-muted-foreground opacity-0 transition-opacity hover:bg-accent hover:text-foreground group-hover/alert:opacity-100"
                    aria-label="Dismiss"
                  >
                    <X className="h-3.5 w-3.5" />
                  </button>
                </div>
              )}
            </div>
          </div>
        </>
      )}

    </div>
  );
}