diff --git a/locales/en-US/topic.json b/locales/en-US/topic.json
index 88ab2e3465..3271c42eee 100644
--- a/locales/en-US/topic.json
+++ b/locales/en-US/topic.json
@@ -135,6 +135,12 @@
   "management.view.card": "Card",
   "management.view.list": "List",
   "newTopic": "New Topic",
+  "projectStatus.failed_one": "{{count}} failed topic",
+  "projectStatus.failed_other": "{{count}} failed topics",
+  "projectStatus.loading_one": "{{count}} loading topic",
+  "projectStatus.loading_other": "{{count}} loading topics",
+  "projectStatus.waitingForHuman_one": "{{count}} topic awaiting input",
+  "projectStatus.waitingForHuman_other": "{{count}} topics awaiting input",
   "renameModal.description": "Keep it short and easy to recognize.",
   "renameModal.title": "Rename Topic",
   "searchPlaceholder": "Search Topics...",
diff --git a/locales/zh-CN/topic.json b/locales/zh-CN/topic.json
index 2b8eb4a2b8..b1e30125f5 100644
--- a/locales/zh-CN/topic.json
+++ b/locales/zh-CN/topic.json
@@ -135,6 +135,12 @@
   "management.view.card": "卡片",
   "management.view.list": "列表",
   "newTopic": "新话题",
+  "projectStatus.failed_one": "{{count}} 个错误话题",
+  "projectStatus.failed_other": "{{count}} 个错误话题",
+  "projectStatus.loading_one": "{{count}} 个加载中话题",
+  "projectStatus.loading_other": "{{count}} 个加载中话题",
+  "projectStatus.waitingForHuman_one": "{{count}} 个等待处理的话题",
+  "projectStatus.waitingForHuman_other": "{{count}} 个等待处理的话题",
   "renameModal.description": "保持简短且易于识别。",
   "renameModal.title": "重命名话题",
   "searchPlaceholder": "搜索话题…",
diff --git a/packages/locales/src/default/topic.ts b/packages/locales/src/default/topic.ts
index 46866c90fd..7a48d5fe3a 100644
--- a/packages/locales/src/default/topic.ts
+++ b/packages/locales/src/default/topic.ts
@@ -66,6 +66,12 @@ export default {
   'inPopup.focus': 'Focus Popup Window',
   'inPopup.title': 'Open in Popup Window',
   'loadMore': 'Load More',
+  'projectStatus.failed_one': '{{count}} failed topic',
+  'projectStatus.failed_other': '{{count}} failed topics',
+  'projectStatus.loading_one': '{{count}} loading topic',
+  'projectStatus.loading_other': '{{count}} loading topics',
+  'projectStatus.waitingForHuman_one': '{{count}} topic awaiting input',
+  'projectStatus.waitingForHuman_other': '{{count}} topics awaiting input',
   'management.actions.newChat': 'New chat',
   'management.actions.select': 'Select',
   'management.actionsMenu.archiveStale.confirm':
diff --git a/packages/utils/src/timing.test.ts b/packages/utils/src/timing.test.ts
index 7d09ccd9d6..55d8c9b894 100644
--- a/packages/utils/src/timing.test.ts
+++ b/packages/utils/src/timing.test.ts
@@ -2,6 +2,7 @@ import { describe, expect, it, vi } from 'vitest';
 
 import {
   createTimingHelpers,
+  formatElapsedClockTime,
   markTimingSinkStageDone,
   markTimingStageDone,
   type TimingLogger,
@@ -11,6 +12,22 @@ import {
 describe('timing utilities', () => {
   const context = { requestId: 'req-1', startedAt: Date.now() };
 
+  describe('formatElapsedClockTime', () => {
+    it('formats elapsed milliseconds as mm:ss below one hour', () => {
+      expect(formatElapsedClockTime(0)).toBe('00:00');
+      expect(formatElapsedClockTime(33_000)).toBe('00:33');
+      expect(formatElapsedClockTime(65_000)).toBe('01:05');
+    });
+
+    it('formats elapsed milliseconds as h:mm:ss at one hour or above', () => {
+      expect(formatElapsedClockTime(3_661_000)).toBe('1:01:01');
+    });
+
+    it('clamps negative elapsed time to zero', () => {
+      expect(formatElapsedClockTime(-1_000)).toBe('00:00');
+    });
+  });
+
   describe('markTimingStageDone', () => {
     it('should emit a done marker with zero stage duration', () => {
       const logger = vi.fn<TimingLogger>();
diff --git a/packages/utils/src/timing.ts b/packages/utils/src/timing.ts
index 3cadae2347..fe6f75ab8f 100644
--- a/packages/utils/src/timing.ts
+++ b/packages/utils/src/timing.ts
@@ -26,6 +26,18 @@ export const createDebugTimingLogger = (namespace: string): TimingLogger => debu
 
 export const getDurationMs = (startedAt: number) => Date.now() - startedAt;
 
+export const formatElapsedClockTime = (ms: number) => {
+  const normalizedMs = Math.max(0, ms);
+  const totalSeconds = Math.floor(normalizedMs / 1000);
+  const hours = Math.floor(totalSeconds / 3600);
+  const minutes = Math.floor((totalSeconds % 3600) / 60);
+  const seconds = totalSeconds % 60;
+  const mm = String(minutes).padStart(2, '0');
+  const ss = String(seconds).padStart(2, '0');
+
+  return hours > 0 ? `${hours}:${mm}:${ss}` : `${mm}:${ss}`;
+};
+
 export const createTimingRequestId = () =>
   globalThis.crypto?.randomUUID?.() ??
   `${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 10)}`;
diff --git a/src/features/Conversation/ChatInput/OpStatusTray.tsx b/src/features/Conversation/ChatInput/OpStatusTray.tsx
index 7540b8f25d..fa40a1e499 100644
--- a/src/features/Conversation/ChatInput/OpStatusTray.tsx
+++ b/src/features/Conversation/ChatInput/OpStatusTray.tsx
@@ -1,5 +1,6 @@
 'use client';
 
+import { formatElapsedClockTime } from '@lobechat/utils';
 import { Flexbox, Icon, Popover, Tooltip } from '@lobehub/ui';
 import { createStaticStyles, cx } from 'antd-style';
 import type { LucideIcon } from 'lucide-react';
@@ -26,9 +27,10 @@ import { parseStatusPhrases, pickStableStatusPhrase } from './OpStatusTray/logic
 
 const styles = createStaticStyles(({ css, cssVar }) => ({
   container: css`
+    container-type: inline-size;
+
     padding-block: 8px;
     padding-inline: 14px;
-    container-type: inline-size;
     border: 1px solid ${cssVar.colorFillSecondary};
     border-block-end: none;
     border-start-start-radius: 12px;
@@ -52,6 +54,7 @@ const styles = createStaticStyles(({ css, cssVar }) => ({
     display: inline-flex;
     gap: 4px;
     align-items: center;
+
     font-variant-numeric: tabular-nums;
     white-space: nowrap;
   `,
@@ -81,8 +84,8 @@ const styles = createStaticStyles(({ css, cssVar }) => ({
     font-size: 12px;
   `,
   metricPopoverValue: css`
-    color: ${cssVar.colorTextSecondary};
     font-variant-numeric: tabular-nums;
+    color: ${cssVar.colorTextSecondary};
   `,
   metricValue: css`
     overflow: hidden;
@@ -90,11 +93,10 @@ const styles = createStaticStyles(({ css, cssVar }) => ({
     text-overflow: ellipsis;
   `,
   compactMetric: css`
+    cursor: default;
     display: none;
     flex: none;
 
-    cursor: default;
-
     @container (max-width: 360px) {
       display: inline-flex;
     }
@@ -106,7 +108,6 @@ const styles = createStaticStyles(({ css, cssVar }) => ({
   `,
   statusText: css`
     overflow: hidden;
-
     font-weight: 500;
     text-overflow: ellipsis;
     white-space: nowrap;
@@ -176,17 +177,6 @@ const ActivityGlyph = memo(() => (
 
 ActivityGlyph.displayName = 'ActivityGlyph';
 
-const formatDuration = (ms: number) => {
-  if (ms < 0) ms = 0;
-  const totalSeconds = Math.floor(ms / 1000);
-  const hours = Math.floor(totalSeconds / 3600);
-  const minutes = Math.floor((totalSeconds % 3600) / 60);
-  const seconds = totalSeconds % 60;
-  const mm = String(minutes).padStart(2, '0');
-  const ss = String(seconds).padStart(2, '0');
-  return hours > 0 ? `${hours}:${mm}:${ss}` : `${mm}:${ss}`;
-};
-
 const formatTokens = (n: number) => {
   if (n < 1000) return String(n);
   if (n < 1_000_000) return `${(n / 1000).toFixed(1)}k`;
@@ -413,7 +403,7 @@ const OpStatusTray = memo<OpStatusTrayProps>(({ topAttached }) => {
       <span className={cx(styles.metric, styles.statusMetric)}>
         <ActivityGlyph />
         <span className={cx(styles.statusText, shinyTextStyles.shinyText)}>{statusText}...</span>
-        <span className={styles.timerValue}>{formatDuration(elapsed)}</span>
+        <span className={styles.timerValue}>{formatElapsedClockTime(elapsed)}</span>
       </span>
 
       {metrics.length > 0 && (
diff --git a/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.test.tsx b/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.test.tsx
index 612bdac53b..7d216f8de3 100644
--- a/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.test.tsx
+++ b/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.test.tsx
@@ -3,11 +3,12 @@
  */
 import { render, screen } from '@testing-library/react';
 import type { ReactNode } from 'react';
-import { describe, expect, it, vi } from 'vitest';
+import { afterEach, describe, expect, it, vi } from 'vitest';
 
 import TopicItem from './index';
 
 const useTopicNavigationMock = vi.hoisted(() => vi.fn());
+const runningStartTimeMock = vi.hoisted(() => ({ value: undefined as number | undefined }));
 
 vi.mock('@lobehub/ui', () => ({
   Flexbox: ({ children, ...props }: { children?: ReactNode; [key: string]: unknown }) => (
@@ -57,9 +58,20 @@ vi.mock('@/const/url', () => ({
   SESSION_CHAT_TOPIC_URL: (agentId: string, topicId: string) => `/agent/${agentId}/${topicId}`,
 }));
 vi.mock('@/features/NavPanel/components/NavItem', () => ({
-  default: ({ active, href, title }: { active?: boolean; href?: string; title?: ReactNode }) => (
+  default: ({
+    active,
+    extra,
+    href,
+    title,
+  }: {
+    active?: boolean;
+    extra?: ReactNode;
+    href?: string;
+    title?: ReactNode;
+  }) => (
     <div data-active={String(active)} data-href={href} data-testid="nav-item">
       {title}
+      {extra}
     </div>
   ),
 }));
@@ -83,6 +95,7 @@ vi.mock('@/store/chat', () => ({
 }));
 vi.mock('@/store/chat/selectors', () => ({
   operationSelectors: {
+    getAgentRuntimeStartTimeByContext: () => () => runningStartTimeMock.value,
     isTopicUnreadCompleted: () => () => false,
   },
 }));
@@ -109,6 +122,11 @@ vi.mock('../../TopicListContent/ThreadList', () => ({
 }));
 
 describe('TopicItem active state', () => {
+  afterEach(() => {
+    runningStartTimeMock.value = undefined;
+    vi.useRealTimers();
+  });
+
   it('keeps the current topic highlighted on topic page sub-routes', () => {
     useTopicNavigationMock.mockReturnValue({
       isInAgentSubRoute: true,
@@ -153,4 +171,21 @@ describe('TopicItem active state', () => {
       '/team/agent/agt_test/tpc_test',
     );
   });
+
+  it('shows running elapsed time in the nav item extra slot', () => {
+    vi.useFakeTimers();
+    const now = Date.UTC(2026, 0, 1, 0, 0, 33);
+    vi.setSystemTime(now);
+    runningStartTimeMock.value = now - 33_000;
+    useTopicNavigationMock.mockReturnValue({
+      isInAgentSubRoute: false,
+      isInTopicContextRoute: false,
+      navigateToTopic: vi.fn(),
+      routeTopicId: undefined,
+    });
+
+    render(<TopicItem id="tpc_test" status="running" title="Topic" />);
+
+    expect(screen.getByText('00:33')).toBeInTheDocument();
+  });
 });
diff --git a/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.tsx b/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.tsx
index e635c4767d..8c0a9bbb70 100644
--- a/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.tsx
+++ b/src/routes/(main)/agent/_layout/Sidebar/Topic/List/Item/index.tsx
@@ -1,8 +1,9 @@
 import type { ChatTopicMetadata, ChatTopicStatus } from '@lobechat/types';
+import { formatElapsedClockTime } from '@lobechat/utils';
 import { Flexbox, Icon, Skeleton, Tag, Text, Tooltip } from '@lobehub/ui';
 import { createStaticStyles, cssVar, keyframes, useTheme } from 'antd-style';
 import { CheckCircle2, Hand, HashIcon, MessageSquareDashed, TriangleAlert } from 'lucide-react';
-import { memo, Suspense, useCallback, useMemo } from 'react';
+import { memo, Suspense, useCallback, useEffect, useMemo, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 
 import { useActiveWorkspaceSlug } from '@/business/client/hooks/useActiveWorkspaceSlug';
@@ -72,6 +73,17 @@ const styles = createStaticStyles(({ css }) => ({
 
     animation: ${rippleAnim} 1.8s ease-out infinite;
   `,
+  runningElapsedTime: css`
+    flex: none;
+
+    min-width: 42px;
+
+    font-size: 12px;
+    font-variant-numeric: tabular-nums;
+    line-height: 1;
+    color: ${cssVar.colorTextTertiary};
+    text-align: end;
+  `,
 }));
 
 // Module-scoped so a click on any topic cancels a pending click on another.
@@ -90,6 +102,37 @@ const cancelPendingSingleClick = () => {
 // a web github URL (".../owner/repo" → "repo").
 const getDirName = (path: string) => path.split('/').findLast(Boolean) || path;
 
+interface RunningElapsedTimeProps {
+  agentId?: string;
+  topicId: string;
+}
+
+const RunningElapsedTime = memo<RunningElapsedTimeProps>(({ agentId, topicId }) => {
+  const startTime = useChatStore(
+    agentId
+      ? operationSelectors.getAgentRuntimeStartTimeByContext({ agentId, topicId })
+      : () => undefined,
+  );
+  const [now, setNow] = useState(() => Date.now());
+
+  useEffect(() => {
+    if (!startTime) return;
+
+    setNow(Date.now());
+    const timer = setInterval(() => setNow(Date.now()), 1000);
+
+    return () => clearInterval(timer);
+  }, [startTime]);
+
+  if (!startTime) return null;
+
+  return (
+    <span className={styles.runningElapsedTime}>{formatElapsedClockTime(now - startTime)}</span>
+  );
+});
+
+RunningElapsedTime.displayName = 'RunningElapsedTime';
+
 interface TopicItemProps {
   active?: boolean;
   fav?: boolean;
@@ -124,7 +167,10 @@ const TopicItem = memo<TopicItemProps>(
     // Construct href for cmd+click support
     const href = useMemo(() => {
       if (!activeAgentId || !id) return undefined;
-      return buildWorkspaceAwarePath(SESSION_CHAT_TOPIC_URL(activeAgentId, id), activeWorkspaceSlug);
+      return buildWorkspaceAwarePath(
+        SESSION_CHAT_TOPIC_URL(activeAgentId, id),
+        activeWorkspaceSlug,
+      );
     }, [activeAgentId, activeWorkspaceSlug, id]);
 
     const [editing, isLoading] = useChatStore((s) => [
@@ -261,6 +307,7 @@ const TopicItem = memo<TopicItemProps>(
           contextMenuItems={dropdownMenu}
           description={workingDirectoryNode}
           disabled={editing}
+          extra={<RunningElapsedTime agentId={activeAgentId} topicId={id} />}
           href={href}
           title={title === '...' ? <DotsLoading gap={3} size={4} /> : title}
           titleColor={cssVar.colorText}
diff --git a/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/GroupItem.tsx b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/GroupItem.tsx
index dd79818f53..384ab41bd4 100644
--- a/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/GroupItem.tsx
+++ b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/GroupItem.tsx
@@ -1,9 +1,17 @@
-import { AccordionItem, ActionIcon, Center, Flexbox, Icon, Text } from '@lobehub/ui';
-import { cssVar } from 'antd-style';
-import { FolderClosedIcon, PlusIcon } from 'lucide-react';
+import { AccordionItem, ActionIcon, Center, Flexbox, Icon, Text, Tooltip } from '@lobehub/ui';
+import { createStaticStyles, cssVar, cx } from 'antd-style';
+import {
+  FolderClosedIcon,
+  FolderOpenIcon,
+  HandIcon,
+  type LucideIcon,
+  PlusIcon,
+  TriangleAlertIcon,
+} from 'lucide-react';
 import { memo, useCallback, useMemo } from 'react';
 import { useTranslation } from 'react-i18next';
 
+import RingLoadingIcon from '@/components/RingLoading';
 import { isDesktop } from '@/const/version';
 import { useCommitWorkingDirectory } from '@/features/ChatInput/ControlBar/useCommitWorkingDirectory';
 import { resolveExecutionTarget } from '@/helpers/executionTarget';
@@ -13,93 +21,226 @@ import { useChatStore } from '@/store/chat';
 
 import TopicItem from '../../List/Item';
 import { type GroupItemComponentProps } from '../GroupedAccordion';
+import {
+  getProjectTopicStatusCounts,
+  hasProjectTopicStatusCounts,
+  type ProjectTopicStatusCounts,
+} from './statusCounts';
 
 const PROJECT_GROUP_PREFIX = 'project:';
 
-const GroupItem = memo<GroupItemComponentProps>(({ group, activeTopicId, activeThreadId }) => {
+const styles = createStaticStyles(({ css }) => ({
+  statusBadge: css`
+    display: inline-flex;
+    gap: 2px;
+    align-items: center;
+    justify-content: center;
+
+    min-width: 20px;
+    height: 18px;
+    padding-inline: 4px;
+    border-radius: 9px;
+
+    font-size: 11px;
+    font-weight: 500;
+    line-height: 1;
+  `,
+  statusBadgeError: css`
+    color: ${cssVar.colorError};
+    background: color-mix(in srgb, ${cssVar.colorError} 14%, transparent);
+  `,
+  statusBadgeLoading: css`
+    color: ${cssVar.colorWarning};
+    background: color-mix(in srgb, ${cssVar.colorWarning} 14%, transparent);
+  `,
+  statusBadgeWaiting: css`
+    color: ${cssVar.colorInfo};
+    background: color-mix(in srgb, ${cssVar.colorInfo} 14%, transparent);
+  `,
+  addTopicAction: css`
+    pointer-events: none;
+
+    overflow: hidden;
+    display: inline-flex;
+
+    width: 0;
+
+    opacity: 0;
+
+    transition:
+      width 150ms ${cssVar.motionEaseOut},
+      opacity 150ms ${cssVar.motionEaseOut};
+
+    &:focus-within,
+    .accordion-header:hover & {
+      pointer-events: auto;
+      width: 24px;
+      opacity: 1;
+    }
+  `,
+}));
+
+interface StatusBadgeConfig {
+  className: string;
+  count: number;
+  icon?: LucideIcon;
+  label: string;
+  loading?: boolean;
+}
+
+const CollapsedStatusBadges = memo<{ counts: ProjectTopicStatusCounts }>(({ counts }) => {
   const { t } = useTranslation('topic');
-  const { id, title, children } = group;
 
-  const workingDirectory = useMemo(
-    () => (id.startsWith(PROJECT_GROUP_PREFIX) ? id.slice(PROJECT_GROUP_PREFIX.length) : undefined),
-    [id],
-  );
+  const items: StatusBadgeConfig[] = [
+    {
+      className: styles.statusBadgeLoading,
+      count: counts.loading,
+      label: t('projectStatus.loading', { count: counts.loading }),
+      loading: true,
+    },
+    {
+      className: styles.statusBadgeWaiting,
+      count: counts.waitingForHuman,
+      icon: HandIcon,
+      label: t('projectStatus.waitingForHuman', { count: counts.waitingForHuman }),
+    },
+    {
+      className: styles.statusBadgeError,
+      count: counts.failed,
+      icon: TriangleAlertIcon,
+      label: t('projectStatus.failed', { count: counts.failed }),
+    },
+  ].filter((item) => item.count > 0);
 
-  const agentId = useAgentStore((s) => s.activeAgentId);
-  const agencyConfig = useAgentStore(agentByIdSelectors.getAgencyConfigById(agentId ?? ''));
-  const isHeterogeneous = useAgentStore((s) =>
-    agentId ? agentByIdSelectors.isAgentHeterogeneousById(agentId)(s) : false,
-  );
-  const { commitAgentDefault } = useCommitWorkingDirectory(agentId ?? '');
-
-  const handleAddTopic = useCallback(async () => {
-    if (!workingDirectory || !agentId) return;
-    // Write the agent's per-device default so the new topic inherits this
-    // directory at creation time — the same high-precedence slot the picker
-    // uses, not the legacy per-agent fallback that gets shadowed by it.
-    await commitAgentDefault(workingDirectory);
-    useChatStore.getState().switchTopic(null, { skipRefreshMessage: true });
-  }, [workingDirectory, agentId, commitAgentDefault]);
-
-  // Web can add a topic in a directory too when the agent targets a bound
-  // device — the write goes to `workingDirByDevice`, no Electron dependency.
-  const effectiveTarget = resolveExecutionTarget(agencyConfig, {
-    isDesktop,
-    isHetero: isHeterogeneous,
-  });
-  const isDeviceMode = effectiveTarget === 'device' && !!agencyConfig?.boundDeviceId;
-  const canAddTopic = (isDesktop || isDeviceMode) && !!workingDirectory;
+  if (items.length === 0) return null;
 
   return (
-    <AccordionItem
-      itemKey={id}
-      paddingBlock={4}
-      paddingInline={4}
-      action={
-        canAddTopic ? (
-          <ActionIcon
-            icon={PlusIcon}
-            size={'small'}
-            title={t('actions.addNewTopicInProject', { directory: title })}
-            tooltipProps={{ placement: 'right' }}
-            onClick={(e) => {
-              e.stopPropagation();
-              void handleAddTopic();
-            }}
-          />
-        ) : undefined
-      }
-      title={
-        <Flexbox horizontal align="center" gap={8} height={24} style={{ overflow: 'hidden' }}>
-          <Center flex={'none'} height={24} width={28}>
-            <Icon
-              color={cssVar.colorTextTertiary}
-              icon={FolderClosedIcon}
-              size={{ size: 15, strokeWidth: 1.5 }}
-            />
-          </Center>
-          <Text ellipsis fontSize={14} style={{ color: cssVar.colorTextSecondary, flex: 1 }}>
-            {title}
-          </Text>
-        </Flexbox>
-      }
-    >
-      <Flexbox gap={1} paddingBlock={1}>
-        {children.map((topic) => (
-          <TopicItem
-            active={activeTopicId === topic.id}
-            fav={topic.favorite}
-            id={topic.id}
-            key={topic.id}
-            metadata={topic.metadata}
-            status={topic.status}
-            threadId={activeThreadId}
-            title={topic.title}
-          />
-        ))}
-      </Flexbox>
-    </AccordionItem>
+    <Flexbox horizontal align={'center'} gap={3}>
+      {items.map(({ className, count, icon, label, loading }) => (
+        <Tooltip key={label} title={label}>
+          <span aria-label={label} className={cx(styles.statusBadge, className)} role="status">
+            {loading ? (
+              <RingLoadingIcon
+                ringColor={`color-mix(in srgb, ${cssVar.colorWarning} 28%, transparent)`}
+                size={11}
+                style={{ color: cssVar.colorWarning }}
+              />
+            ) : (
+              icon && <Icon icon={icon} size={{ size: 11, strokeWidth: 2 }} />
+            )}
+            {count}
+          </span>
+        </Tooltip>
+      ))}
+    </Flexbox>
   );
 });
 
+CollapsedStatusBadges.displayName = 'CollapsedProjectStatusBadges';
+
+const GroupItem = memo<GroupItemComponentProps>(
+  ({ group, activeTopicId, activeThreadId, expanded }) => {
+    const { t } = useTranslation('topic');
+    const { id, title, children } = group;
+
+    const workingDirectory = useMemo(
+      () =>
+        id.startsWith(PROJECT_GROUP_PREFIX) ? id.slice(PROJECT_GROUP_PREFIX.length) : undefined,
+      [id],
+    );
+
+    const agentId = useAgentStore((s) => s.activeAgentId);
+    const agencyConfig = useAgentStore(agentByIdSelectors.getAgencyConfigById(agentId ?? ''));
+    const isHeterogeneous = useAgentStore((s) =>
+      agentId ? agentByIdSelectors.isAgentHeterogeneousById(agentId)(s) : false,
+    );
+    const { commitAgentDefault } = useCommitWorkingDirectory(agentId ?? '');
+
+    const handleAddTopic = useCallback(async () => {
+      if (!workingDirectory || !agentId) return;
+      // Write the agent's per-device default so the new topic inherits this
+      // directory at creation time — the same high-precedence slot the picker
+      // uses, not the legacy per-agent fallback that gets shadowed by it.
+      await commitAgentDefault(workingDirectory);
+      useChatStore.getState().switchTopic(null, { skipRefreshMessage: true });
+    }, [workingDirectory, agentId, commitAgentDefault]);
+
+    // Web can add a topic in a directory too when the agent targets a bound
+    // device — the write goes to `workingDirByDevice`, no Electron dependency.
+    const effectiveTarget = resolveExecutionTarget(agencyConfig, {
+      isDesktop,
+      isHetero: isHeterogeneous,
+    });
+    const isDeviceMode = effectiveTarget === 'device' && !!agencyConfig?.boundDeviceId;
+    const canAddTopic = (isDesktop || isDeviceMode) && !!workingDirectory;
+
+    const loadingTopicIds = useChatStore((s) => s.topicLoadingIds);
+    const statusCounts = useMemo(
+      () => getProjectTopicStatusCounts(children, new Set(loadingTopicIds)),
+      [children, loadingTopicIds],
+    );
+    const hasCollapsedStatus = !expanded && hasProjectTopicStatusCounts(statusCounts);
+    const ProjectFolderIcon = expanded ? FolderOpenIcon : FolderClosedIcon;
+    const action =
+      canAddTopic || hasCollapsedStatus ? (
+        <Flexbox horizontal align={'center'} gap={4}>
+          {hasCollapsedStatus && <CollapsedStatusBadges counts={statusCounts} />}
+          {canAddTopic && (
+            <span className={hasCollapsedStatus ? styles.addTopicAction : undefined}>
+              <ActionIcon
+                icon={PlusIcon}
+                size={'small'}
+                title={t('actions.addNewTopicInProject', { directory: title })}
+                tooltipProps={{ placement: 'right' }}
+                onClick={(e) => {
+                  e.stopPropagation();
+                  void handleAddTopic();
+                }}
+              />
+            </span>
+          )}
+        </Flexbox>
+      ) : undefined;
+
+    return (
+      <AccordionItem
+        action={action}
+        alwaysShowAction={hasCollapsedStatus}
+        itemKey={id}
+        paddingBlock={4}
+        paddingInline={4}
+        title={
+          <Flexbox horizontal align="center" gap={8} height={24} style={{ overflow: 'hidden' }}>
+            <Center flex={'none'} height={24} width={28}>
+              <Icon
+                color={cssVar.colorTextTertiary}
+                icon={ProjectFolderIcon}
+                size={{ size: 15, strokeWidth: 1.5 }}
+              />
+            </Center>
+            <Text ellipsis fontSize={14} style={{ color: cssVar.colorTextSecondary, flex: 1 }}>
+              {title}
+            </Text>
+          </Flexbox>
+        }
+      >
+        <Flexbox gap={1} paddingBlock={1}>
+          {children.map((topic) => (
+            <TopicItem
+              active={activeTopicId === topic.id}
+              fav={topic.favorite}
+              id={topic.id}
+              key={topic.id}
+              metadata={topic.metadata}
+              status={topic.status}
+              threadId={activeThreadId}
+              title={topic.title}
+            />
+          ))}
+        </Flexbox>
+      </AccordionItem>
+    );
+  },
+);
+
 export default GroupItem;
diff --git a/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/statusCounts.test.ts b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/statusCounts.test.ts
new file mode 100644
index 0000000000..f423e68069
--- /dev/null
+++ b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/statusCounts.test.ts
@@ -0,0 +1,64 @@
+import { describe, expect, it } from 'vitest';
+
+import { type ChatTopic } from '@/types/topic';
+
+import { getProjectTopicStatusCounts, hasProjectTopicStatusCounts } from './statusCounts';
+
+const createTopic = (id: string, status?: ChatTopic['status']): ChatTopic =>
+  ({
+    createdAt: 0,
+    favorite: false,
+    id,
+    status,
+    title: id,
+    updatedAt: 0,
+  }) as ChatTopic;
+
+describe('getProjectTopicStatusCounts', () => {
+  it('counts loading, waiting-for-human, and failed topics by type', () => {
+    const counts = getProjectTopicStatusCounts(
+      [
+        createTopic('running', 'running'),
+        createTopic('client-loading'),
+        createTopic('waiting', 'waitingForHuman'),
+        createTopic('failed', 'failed'),
+        createTopic('active', 'active'),
+      ],
+      new Set(['client-loading']),
+    );
+
+    expect(counts).toEqual({
+      failed: 1,
+      loading: 2,
+      waitingForHuman: 1,
+    });
+    expect(hasProjectTopicStatusCounts(counts)).toBe(true);
+  });
+
+  it('uses the same precedence as topic row icons', () => {
+    const counts = getProjectTopicStatusCounts(
+      [createTopic('waiting', 'waitingForHuman'), createTopic('failed', 'failed')],
+      new Set(['waiting', 'failed']),
+    );
+
+    expect(counts).toEqual({
+      failed: 0,
+      loading: 1,
+      waitingForHuman: 1,
+    });
+  });
+
+  it('reports empty counts when no actionable status exists', () => {
+    const counts = getProjectTopicStatusCounts(
+      [createTopic('active', 'active'), createTopic('completed', 'completed')],
+      new Set(),
+    );
+
+    expect(counts).toEqual({
+      failed: 0,
+      loading: 0,
+      waitingForHuman: 0,
+    });
+    expect(hasProjectTopicStatusCounts(counts)).toBe(false);
+  });
+});
diff --git a/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/statusCounts.ts b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/statusCounts.ts
new file mode 100644
index 0000000000..86b474ad37
--- /dev/null
+++ b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/ByProjectMode/statusCounts.ts
@@ -0,0 +1,41 @@
+import { type ChatTopic } from '@/types/topic';
+
+export interface ProjectTopicStatusCounts {
+  failed: number;
+  loading: number;
+  waitingForHuman: number;
+}
+
+export const EMPTY_PROJECT_TOPIC_STATUS_COUNTS: ProjectTopicStatusCounts = {
+  failed: 0,
+  loading: 0,
+  waitingForHuman: 0,
+};
+
+export const getProjectTopicStatusCounts = (
+  topics: ChatTopic[],
+  loadingTopicIds: ReadonlySet<string>,
+): ProjectTopicStatusCounts =>
+  topics.reduce<ProjectTopicStatusCounts>(
+    (counts, topic) => {
+      if (topic.status === 'waitingForHuman') {
+        counts.waitingForHuman += 1;
+        return counts;
+      }
+
+      if (loadingTopicIds.has(topic.id) || topic.status === 'running') {
+        counts.loading += 1;
+        return counts;
+      }
+
+      if (topic.status === 'failed') {
+        counts.failed += 1;
+      }
+
+      return counts;
+    },
+    { ...EMPTY_PROJECT_TOPIC_STATUS_COUNTS },
+  );
+
+export const hasProjectTopicStatusCounts = (counts: ProjectTopicStatusCounts) =>
+  counts.loading > 0 || counts.waitingForHuman > 0 || counts.failed > 0;
diff --git a/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/GroupedAccordion.tsx b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/GroupedAccordion.tsx
index d9e0b70b4a..ce2f011ce4 100644
--- a/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/GroupedAccordion.tsx
+++ b/src/routes/(main)/agent/_layout/Sidebar/Topic/TopicListContent/GroupedAccordion.tsx
@@ -23,6 +23,7 @@ import { useAgentTopicGroupMode } from '../hooks/useAgentTopicGroupMode';
 export interface GroupItemComponentProps {
   activeThreadId?: string;
   activeTopicId?: string;
+  expanded: boolean;
   group: GroupedTopic;
 }
 
@@ -75,6 +76,7 @@ const GroupedAccordion = memo<GroupedAccordionProps>(({ GroupItem }) => {
           <GroupItem
             activeThreadId={activeThreadId}
             activeTopicId={activeTopicId}
+            expanded={expandedKeys.includes(group.id)}
             group={group}
             key={group.id}
           />
diff --git a/src/store/chat/slices/operation/__tests__/selectors.test.ts b/src/store/chat/slices/operation/__tests__/selectors.test.ts
index c1fe1f314b..19ab9d8fb0 100644
--- a/src/store/chat/slices/operation/__tests__/selectors.test.ts
+++ b/src/store/chat/slices/operation/__tests__/selectors.test.ts
@@ -509,6 +509,72 @@ describe('Operation Selectors', () => {
     });
   });
 
+  describe('getAgentRuntimeStartTimeByContext', () => {
+    it('should return the earliest running runtime start time for the context', () => {
+      const { result } = renderHook(() => useChatStore());
+
+      act(() => {
+        result.current.startOperation({
+          type: 'execAgentRuntime',
+          context: { agentId: 'agent1', topicId: 'topic1' },
+          metadata: { startTime: 2000 },
+        });
+
+        result.current.startOperation({
+          type: 'execHeterogeneousAgent',
+          context: { agentId: 'agent1', topicId: 'topic1' },
+          metadata: { startTime: 1000 },
+        });
+
+        result.current.startOperation({
+          type: 'reasoning',
+          context: { agentId: 'agent1', topicId: 'topic1' },
+          metadata: { startTime: 500 },
+        });
+
+        result.current.startOperation({
+          type: 'execAgentRuntime',
+          context: { agentId: 'agent1', topicId: 'topic2' },
+          metadata: { startTime: 300 },
+        });
+      });
+
+      expect(
+        operationSelectors.getAgentRuntimeStartTimeByContext({
+          agentId: 'agent1',
+          topicId: 'topic1',
+        })(result.current),
+      ).toBe(1000);
+    });
+
+    it('should ignore completed and aborting runtime operations', () => {
+      const { result } = renderHook(() => useChatStore());
+
+      act(() => {
+        const completedOpId = result.current.startOperation({
+          type: 'execAgentRuntime',
+          context: { agentId: 'agent1', topicId: 'topic1' },
+          metadata: { startTime: 1000 },
+        }).operationId;
+
+        result.current.completeOperation(completedOpId);
+
+        result.current.startOperation({
+          type: 'execHeterogeneousAgent',
+          context: { agentId: 'agent1', topicId: 'topic1' },
+          metadata: { isAborting: true, startTime: 1500 },
+        });
+      });
+
+      expect(
+        operationSelectors.getAgentRuntimeStartTimeByContext({
+          agentId: 'agent1',
+          topicId: 'topic1',
+        })(result.current),
+      ).toBeUndefined();
+    });
+  });
+
   describe('getRunningToolCallStartTime', () => {
     it('should prefer the running executeToolCall start time', () => {
       const { result } = renderHook(() => useChatStore());
diff --git a/src/store/chat/slices/operation/selectors.ts b/src/store/chat/slices/operation/selectors.ts
index dfb1238ef0..24cad548f0 100644
--- a/src/store/chat/slices/operation/selectors.ts
+++ b/src/store/chat/slices/operation/selectors.ts
@@ -220,6 +220,37 @@ const isAgentRuntimeRunningByContext =
     );
   };
 
+/**
+ * Get the earliest start time for a running agent runtime operation in a
+ * specific context. This anchors visible elapsed-time UI to the top-level
+ * runtime op instead of short-lived sub-operations.
+ */
+const getAgentRuntimeStartTimeByContext =
+  (context: MessageMapKeyInput) =>
+  (s: ChatStoreState): number | undefined => {
+    if (!context.agentId) return undefined;
+
+    const operations = getOperationsByContext(context)(s);
+    let startTime: number | undefined;
+
+    for (const op of operations) {
+      if (
+        op.status !== 'running' ||
+        op.metadata.isAborting ||
+        !AI_RUNTIME_OPERATION_TYPES.includes(op.type)
+      ) {
+        continue;
+      }
+
+      startTime =
+        startTime === undefined
+          ? op.metadata.startTime
+          : Math.min(startTime, op.metadata.startTime);
+    }
+
+    return startTime;
+  };
+
 /**
  * Check if input should show loading state in a specific context
  * Includes sendMessage in addition to AI runtime operations,
@@ -603,6 +634,7 @@ export const operationSelectors = {
   getDeepestRunningOperationByMessage,
   getOperationById,
   getOperationContextFromMessage,
+  getAgentRuntimeStartTimeByContext,
   getOperationsByContext,
   getOperationsByMessage,
   getOperationsByType,