diff --git a/shared/chat/session-title.ts b/shared/chat/session-title.ts
index d57f6378..93a7c73c 100644
--- a/shared/chat/session-title.ts
+++ b/shared/chat/session-title.ts
@@ -2,6 +2,14 @@ const ACP_WORKING_DIRECTORY_PREFIX = /^\[Working directory: [^\r\n]*\](?:\r?\n){
 const ACP_WORKING_DIRECTORY_TRUNCATED_TITLE = /^\[Working directory: [^\r\n]*\]…$/
 const OPENCLAW_SESSION_ID_FALLBACK_TITLE = /^([0-9a-f]{8}) \((\d{4}-\d{2}-\d{2})\)$/i
 
+export type SessionTitleSource = {
+  key: string
+  sessionId?: string
+  label?: string
+  derivedTitle?: string
+  displayName?: string
+}
+
 export function stripAcpWorkingDirectoryPrefix(text: string): string {
   return text.replace(ACP_WORKING_DIRECTORY_PREFIX, '')
 }
@@ -19,3 +27,20 @@ export function isOpenClawSessionIdFallbackTitle(
   const match = text.trim().match(OPENCLAW_SESSION_ID_FALLBACK_TITLE)
   return Boolean(match && normalizedSessionId.startsWith(match[1]!.toLowerCase()))
 }
+
+/** Resolve the same human-readable title used for a session everywhere in the UI. */
+export function getSessionDisplayTitle(
+  session: SessionTitleSource,
+  sessionLabels: Record<string, string> = {},
+): string {
+  const candidates = [
+    sessionLabels[session.key],
+    session.label,
+    session.derivedTitle,
+    session.displayName,
+  ]
+  return candidates.find((candidate) => (
+    candidate?.trim()
+    && !isOpenClawSessionIdFallbackTitle(candidate, session.sessionId)
+  ))?.trim() ?? session.key
+}
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 3b2d8abe..c8c2bae2 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -34,7 +34,7 @@ import { cn } from '@/lib/utils';
 import { isGatewayRestarting } from '@/lib/gateway-status';
 import { rendererExtensionRegistry } from '@/extensions/registry';
 import { useSettingsStore } from '@/stores/settings';
-import { useChatStore, type ChatSession } from '@/stores/chat';
+import { useChatStore } from '@/stores/chat';
 import { useSessionAttentionStore } from '@/stores/session-attention';
 import { useGatewayStore } from '@/stores/gateway';
 import { useAgentsStore } from '@/stores/agents';
@@ -54,7 +54,7 @@ import { useNewChatAction } from './use-new-chat-action';
 import { isDefaultWorkspacePath } from '@/lib/workspace-context';
 import { useWorkspaceAvailability } from '@/hooks/use-workspace-availability';
 import { projectSessionRunState } from '@/stores/chat/session-status';
-import { isOpenClawSessionIdFallbackTitle } from '@shared/chat/session-title';
+import { getSessionDisplayTitle } from '@shared/chat/session-title';
 
 interface NavItemProps {
   to: string;
@@ -202,19 +202,6 @@ export function Sidebar() {
   const navigate = useNavigate();
   const isOnChat = useLocation().pathname === '/';
 
-  const getSessionLabel = (session: ChatSession) => {
-    const candidates = [
-      sessionLabels[session.key],
-      session.label,
-      session.derivedTitle,
-      session.displayName,
-    ];
-    return candidates.find((candidate) => (
-      candidate?.trim()
-      && !isOpenClawSessionIdFallbackTitle(candidate, session.sessionId)
-    ))?.trim() ?? session.key;
-  };
-
   const openControlUi = async (view?: 'dreams', label = 'OpenClaw Page') => {
     try {
       const result = await hostApi.gateway.controlUi(view);
@@ -726,7 +713,7 @@ export function Sidebar() {
                         const agentName = agentNameById[agentId] || agentId;
                         const isEditing = editingSessionKey === s.key;
                         const isCurrentSession = isOnChat && currentSessionKey === s.key;
-                        const sessionLabel = getSessionLabel(s);
+                        const sessionLabel = getSessionDisplayTitle(s, sessionLabels);
                         const relativeTime = formatSessionRelativeTime(activityMs, nowMs, i18n.language);
                         const runState = projectSessionRunState(s);
                         const attention = sessionAttentionByKey[s.key];
diff --git a/src/pages/Chat/AcpMessageSegment.tsx b/src/pages/Chat/AcpMessageSegment.tsx
index 7143ea9c..e81a2789 100644
--- a/src/pages/Chat/AcpMessageSegment.tsx
+++ b/src/pages/Chat/AcpMessageSegment.tsx
@@ -126,7 +126,7 @@ export function AcpAssistantHoverBar({ text }: { text: string }) {
   const label = copied ? t('acp.copied') : t('acp.copy');
 
   return (
-    <div className="flex w-full justify-end px-1 opacity-0 transition-opacity duration-150 group-hover:opacity-100 group-focus-within:opacity-100">
+    <div className="flex w-full justify-start px-1 opacity-0 transition-opacity duration-150 group-hover:opacity-100 group-focus-within:opacity-100">
       <button
         type="button"
         data-testid="acp-assistant-copy"
diff --git a/src/pages/Chat/index.tsx b/src/pages/Chat/index.tsx
index c0b3c665..917f3ee8 100644
--- a/src/pages/Chat/index.tsx
+++ b/src/pages/Chat/index.tsx
@@ -28,6 +28,7 @@ import { getAcpUserMessageAnchorId } from '@/lib/acp/timeline-anchors';
 import type { MessageSegmentItem, RenderPart } from '@/lib/acp/timeline-types';
 import { projectOpenClawFileActivities, type AcpFileActivityProjection } from '@/lib/acp/openclaw-file-activities';
 import { hostApi } from '@/lib/host-api';
+import { getSessionDisplayTitle } from '@shared/chat/session-title';
 import { ChatInput, type ChatWorkspaceOption, type FileAttachment } from './ChatInput';
 import { ChatToolbar } from './ChatToolbar';
 import { AcpTimeline } from './AcpTimeline';
@@ -179,6 +180,7 @@ export function Chat() {
 
   const currentSessionKey = useChatStore((s) => s.currentSessionKey);
   const sessions = useChatStore((s) => s.sessions);
+  const sessionLabels = useChatStore((s) => s.sessionLabels);
   const currentAgentId = useChatStore((s) => s.currentAgentId);
   const loadSessions = useChatStore((s) => s.loadSessions);
   const selectAcpSession = useChatStore((s) => s.selectAcpSession);
@@ -204,6 +206,9 @@ export function Chat() {
     () => sessions.find((session) => session.key === currentSessionKey) ?? null,
     [currentSessionKey, sessions],
   );
+  const currentSessionTitle = currentSession
+    ? getSessionDisplayTitle(currentSession, sessionLabels)
+    : currentSessionKey;
   const effectiveWorkspace = useMemo(
     () => resolveEffectiveWorkspace({ session: currentSession, globalWorkspace: chatWorkspacePath }),
     [chatWorkspacePath, currentSession],
@@ -445,8 +450,22 @@ export function Chat() {
       style={{ height: isMac ? 'calc(100vh - 1px)' : 'calc(100vh - 2.5rem)' }}
     >
       <div className="flex min-w-0 flex-1 flex-col">
-        <div className="relative flex shrink-0 items-center justify-end px-4 py-2">
+        <div className={cn(
+          'relative flex shrink-0 items-center px-4 py-2',
+          isWindows ? 'gap-4' : 'justify-end',
+        )}>
           <div data-testid="chat-toolbar-drag-region" className="drag-region absolute inset-0 z-0" aria-hidden="true" />
+          {isWindows && (
+            <div className="drag-region relative z-10 min-w-0 flex-1">
+              <h1
+                data-testid="chat-session-title"
+                title={currentSessionTitle}
+                className="truncate text-sm font-medium text-foreground"
+              >
+                {currentSessionTitle}
+              </h1>
+            </div>
+          )}
           <div data-testid="chat-toolbar-actions" className="no-drag relative z-10">
             <ChatToolbar
               questionDirectoryOpen={questionDirectoryVisible}
diff --git a/tests/e2e/chat-acp-inline-timeline.spec.ts b/tests/e2e/chat-acp-inline-timeline.spec.ts
index 6fa5f716..125edadb 100644
--- a/tests/e2e/chat-acp-inline-timeline.spec.ts
+++ b/tests/e2e/chat-acp-inline-timeline.spec.ts
@@ -596,9 +596,17 @@ test.describe('ClawX ACP inline timeline', () => {
       await expect(page.getByTestId('acp-assistant-avatar')).toBeVisible();
 
       await assistantMessage.hover();
-      await page.getByTestId('acp-assistant-copy').click();
+      const copyButton = page.getByTestId('acp-assistant-copy');
+      await expect.poll(async () => {
+        const [assistantBox, copyBox] = await Promise.all([
+          assistantMessage.boundingBox(),
+          copyButton.boundingBox(),
+        ]);
+        return !!assistantBox && !!copyBox && copyBox.x <= assistantBox.x + 8;
+      }).toBe(true);
+      await copyButton.click();
 
-      await expect(page.getByTestId('acp-assistant-copy')).toHaveAttribute('aria-label', 'Copied');
+      await expect(copyButton).toHaveAttribute('aria-label', 'Copied');
       await expect.poll(() => page.evaluate(() => (window as unknown as { __acpCopiedText?: string }).__acpCopiedText)).toBe('Copy this ACP answer');
     } finally {
       await closeElectronApp(app);
diff --git a/tests/e2e/chat-workspace-context.spec.ts b/tests/e2e/chat-workspace-context.spec.ts
index 15312105..365a3393 100644
--- a/tests/e2e/chat-workspace-context.spec.ts
+++ b/tests/e2e/chat-workspace-context.spec.ts
@@ -223,6 +223,7 @@ async function installWorkspaceMocks(app: ElectronApplication, options: Workspac
       [stableStringify(['chat', 'loadAcpSession', { sessionKey: SESSION_KEY, workspaceRoot: DEFAULT_WORKSPACE, cwd: DEFAULT_WORKSPACE }])]: acpLoadResult,
       [stableStringify(['chat', 'loadAcpSession', { sessionKey: SESSION_KEY, workspaceRoot: SESSION_WORKSPACE, cwd: SESSION_WORKSPACE }])]: acpLoadResult,
       [stableStringify(['sessions', 'delete', { id: SESSION_KEY }])]: { success: true },
+      [stableStringify(['sessions', 'rename', { id: SESSION_KEY, title: 'Renamed conversation' }])]: { success: true },
     },
     recordHostInvocations: true,
   });
@@ -347,6 +348,38 @@ test.describe('ClawX chat workspace context', () => {
     }
   });
 
+  test('chat header shows the current sidebar title and follows session renames', async ({ launchElectronApp }) => {
+    test.skip(process.platform !== 'win32', 'Conversation title header is Windows-only');
+    const app = await launchElectronApp({ skipSetup: true });
+
+    try {
+      await installWorkspaceMocks(app, {
+        sessionDerivedTitle: AUTO_TITLE_WITH_CWD,
+        sessionSummaryFirstUserText: null,
+      });
+
+      const page = await getStableWindow(app);
+      try {
+        await page.reload();
+      } catch (error) {
+        if (!String(error).includes('ERR_FILE_NOT_FOUND')) throw error;
+      }
+
+      const chatTitle = page.getByTestId('chat-session-title');
+      await expect(chatTitle).toHaveText('Workspace chat', { timeout: 30_000 });
+
+      const sidebarSession = page.getByTestId(`sidebar-session-${SESSION_KEY}`);
+      await sidebarSession.hover();
+      await page.getByRole('button', { name: 'Rename' }).click();
+      await page.getByRole('textbox', { name: 'Session title' }).fill('Renamed conversation');
+      await page.getByRole('button', { name: 'Save session title' }).click();
+
+      await expect(chatTitle).toHaveText('Renamed conversation');
+    } finally {
+      await closeElectronApp(app);
+    }
+  });
+
   test('new chat workspace menu lists and switches to recent and known workspaces', async ({ launchElectronApp }) => {
     const app = await launchElectronApp({ skipSetup: true });
 
diff --git a/tests/unit/session-title.test.ts b/tests/unit/session-title.test.ts
index 5dfd1daf..56514103 100644
--- a/tests/unit/session-title.test.ts
+++ b/tests/unit/session-title.test.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it } from 'vitest'
 import {
+  getSessionDisplayTitle,
   isAcpWorkingDirectoryTruncatedTitle,
   isOpenClawSessionIdFallbackTitle,
   stripAcpWorkingDirectoryPrefix,
@@ -67,6 +68,32 @@ describe('isOpenClawSessionIdFallbackTitle', () => {
   })
 })
 
+describe('getSessionDisplayTitle', () => {
+  const session = {
+    key: 'agent:main:session-a',
+    sessionId: '72e4b28b-8477-4e29-b57e-e14448fd42d0',
+    label: 'Generated title',
+    derivedTitle: 'Derived title',
+    displayName: 'Display name',
+  }
+
+  it('prefers the persisted user label shared by the sidebar and chat header', () => {
+    expect(getSessionDisplayTitle(session, { [session.key]: 'Renamed conversation' }))
+      .toBe('Renamed conversation')
+  })
+
+  it('skips an OpenClaw UUID fallback title', () => {
+    expect(getSessionDisplayTitle({
+      ...session,
+      label: '72e4b28b (2026-07-22)',
+    }, {})).toBe('Derived title')
+  })
+
+  it('falls back safely when session labels are unavailable', () => {
+    expect(getSessionDisplayTitle(session)).toBe('Generated title')
+  })
+})
+
 describe('isAcpWorkingDirectoryTruncatedTitle', () => {
   it('identifies a cwd envelope truncated before the user prompt', () => {
     expect(