diff --git a/src/App.tsx b/src/App.tsx
index b7fb14e..86d86a4 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,6 +1,7 @@
 import { useEffect, useState } from 'react';
 import { Routes, Route, Navigate, useLocation, useNavigate } from 'react-router-dom';
-import { Spin } from 'antd';
+import { Button, Drawer, Spin } from 'antd';
+import { MenuOutlined, SearchOutlined } from '@ant-design/icons';
 import Sidebar from './components/Sidebar';
 import CommandPalette from './components/CommandPalette';
 import AgentList from './pages/AgentList';
@@ -25,6 +26,8 @@ export default function App() {
   const { user } = useAuth();
   const location = useLocation();
   const [paletteOpen, setPaletteOpen] = useState(false);
+  const [mobileNavOpen, setMobileNavOpen] = useState(false);
+  const [isMobile, setIsMobile] = useState(() => (typeof window === 'undefined' ? false : window.innerWidth < 768));
 
   // 全局快捷键 Ctrl/⌘ + K
   useEffect(() => {
@@ -38,6 +41,12 @@ export default function App() {
     window.addEventListener('keydown', handler);
     return () => window.removeEventListener('keydown', handler);
   }, [user]);
+
+  useEffect(() => {
+    const onResize = () => setIsMobile(window.innerWidth < 768);
+    window.addEventListener('resize', onResize);
+    return () => window.removeEventListener('resize', onResize);
+  }, []);
 
   const mainContent = (
     <Routes>
@@ -73,13 +82,32 @@ export default function App() {
       ) : (
         <div className="layout-shell">
           {/* 只有编辑器全屏显示，其他页面均保留侧边栏 */}
-          {!location.pathname.startsWith('/agents/') || location.pathname.includes('/chat') ? (
+          {!isMobile && (!location.pathname.startsWith('/agents/') || location.pathname.includes('/chat')) ? (
             <Sidebar onOpenPalette={() => setPaletteOpen(true)} />
           ) : null}
-          <main className="main">
-            {mainContent}
+          <main className="main">
+            {isMobile && (
+              <div className="mobile-topbar">
+                <Button type="text" icon={<MenuOutlined />} onClick={() => setMobileNavOpen(true)} />
+                <div className="mobile-topbar-title">Agent Studio</div>
+                <Button type="text" icon={<SearchOutlined />} onClick={() => setPaletteOpen(true)} />
+              </div>
+            )}
+            <div className="main-content">{mainContent}</div>
           </main>
           <CommandPalette open={paletteOpen} onClose={() => setPaletteOpen(false)} />
+          {isMobile && (
+            <Drawer
+              title="导航"
+              placement="left"
+              open={mobileNavOpen}
+              onClose={() => setMobileNavOpen(false)}
+              width={280}
+              styles={{ body: { padding: 0 } }}
+            >
+              <Sidebar onOpenPalette={() => setPaletteOpen(true)} onNavigate={() => setMobileNavOpen(false)} />
+            </Drawer>
+          )}
         </div>
       )}
     </>
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index a680737..c1db857 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -18,6 +18,7 @@ import { useTheme } from '../main';
 
 interface Props {
   onOpenPalette?: () => void;
+  onNavigate?: () => void;
 }
 
 const NAV_GROUPS: Array<{
@@ -54,7 +55,7 @@ const NAV_GROUPS: Array<{
   }
 ];
 
-export default function Sidebar({ onOpenPalette }: Props) {
+export default function Sidebar({ onOpenPalette, onNavigate }: Props) {
   const { user, logout } = useAuth();
   const navigate = useNavigate();
   const { mode, toggle } = useTheme();
@@ -77,7 +78,10 @@ export default function Sidebar({ onOpenPalette }: Props) {
       </div>
 
       <div
-        onClick={onOpenPalette}
+        onClick={() => {
+          onOpenPalette?.();
+          onNavigate?.();
+        }}
         className="nav-item"
         style={{
           cursor: 'pointer',
@@ -103,6 +107,7 @@ export default function Sidebar({ onOpenPalette }: Props) {
                 to={it.to}
                 end={it.end}
                 className={({ isActive }) => `nav-item ${isActive ? 'active' : ''}`}
+                onClick={onNavigate}
               >
                 <span className="nav-icon">{it.icon}</span>
                 <span>{it.label}</span>
@@ -135,6 +140,7 @@ export default function Sidebar({ onOpenPalette }: Props) {
                 onClick: async () => {
                   await logout();
                   navigate('/login');
+                  onNavigate?.();
                 }
               }
             ]
diff --git a/src/pages/chat/components/ChatOutline.tsx b/src/pages/chat/components/ChatOutline.tsx
index 906cbde..5f2ad7c 100644
--- a/src/pages/chat/components/ChatOutline.tsx
+++ b/src/pages/chat/components/ChatOutline.tsx
@@ -16,7 +16,14 @@ export default function ChatOutline(props: { messages: ChatMessage[]; onJump: (i
   const { messages, onJump, activeId } = props;
   const items = messages.filter((m) => ((m as any)?.speaker?.type ? (m as any).speaker.type === 'agent' : m.role === 'assistant'));
 
-  if (items.length === 0) return null;
+  if (items.length === 0) {
+    return (
+      <aside className="chat-outline">
+        <div className="chat-outline-title">聊天段落</div>
+        <div style={{ padding: 12, color: 'var(--color-text-tertiary)', fontSize: 12 }}>暂无</div>
+      </aside>
+    );
+  }
 
   return (
     <aside className="chat-outline">
diff --git a/src/pages/chat/components/ChatPageH5.tsx b/src/pages/chat/components/ChatPageH5.tsx
index 50a274b..557312d 100644
--- a/src/pages/chat/components/ChatPageH5.tsx
+++ b/src/pages/chat/components/ChatPageH5.tsx
@@ -100,6 +100,9 @@ export default function ChatPageH5({ logic }: { logic: ChatPageLogicOutput }) {
                 <Button size="small" onClick={() => setOutlineDrawerOpen(true)}>
                   大纲
                 </Button>
+                <Button size="small" onClick={() => setHistoryDrawerOpen(true)}>
+                  历史对话
+                </Button>
               </Space>
             </div>
 
diff --git a/src/styles.css b/src/styles.css
index f55bf75..1eef0ae 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -620,12 +620,42 @@ body {
 }
 
 @media (max-width: 768px) {
-  .sidebar {
+  .layout-shell > .sidebar {
     display: none;
   }
 
   .main {
     width: 100vw;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+  }
+
+  .mobile-topbar {
+    height: 48px;
+    flex: 0 0 auto;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 0 8px;
+    border-bottom: 1px solid var(--color-border);
+    background: var(--color-surface);
+  }
+
+  .mobile-topbar-title {
+    flex: 1;
+    min-width: 0;
+    font-weight: 700;
+    color: var(--color-text);
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .main-content {
+    flex: 1;
+    min-height: 0;
+    overflow: auto;
   }
 
   .chat-shell {
@@ -677,6 +707,10 @@ body {
   }
 }
 
+.main-content {
+  min-height: 0;
+}
+
 .chat-body .messages-container {
   max-width: 780px;
   width: 100%;