diff --git a/web/src/features/channel/ChatMessage.tsx b/web/src/features/channel/ChatMessage.tsx
index 6d4d390..b8526ee 100644
--- a/web/src/features/channel/ChatMessage.tsx
+++ b/web/src/features/channel/ChatMessage.tsx
@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useState, type MouseEvent } from 'react';
 import { isLocalId, useWorkspace } from '@/store/workspace';
 import { useAccount } from '@/store/account';
 import { useDownload } from '@/features/item/download';
@@ -7,6 +7,7 @@ import { senderLabel } from '@/lib/sender';
 import { formatSize, formatTime, formatTransferProgress } from '@/lib/format';
 import { Icon } from '@/ui/Icon';
 import { Button } from '@/ui/Button';
+import { ContextMenu, type MenuAction } from '@/ui/ContextMenu';
 import styles from './ChatPane.module.css';
 
 interface Props { id: string; compact?: boolean; onOpenFile: (id: string) => void; onDelete: (id: string) => void }
@@ -18,6 +19,7 @@ export function ChatMessage({ id, compact = false, onOpenFile, onDelete }: Props
   const username = useAccount((s) => s.username);
   const download = useDownload();
   const [downloading, setDownloading] = useState(false);
+  const [menu, setMenu] = useState<{ x: number; y: number }>();
   if (!item) return null;
   const sender = item.author;
   const name = senderLabel(item);
@@ -31,7 +33,17 @@ export function ChatMessage({ id, compact = false, onOpenFile, onDelete }: Props
     if (!item || downloading) return;
     setDownloading(true); try { await download(item); } finally { setDownloading(false); }
   }
-  return <article className={`${styles.message} ${compact ? styles.compact : ''} ${sending ? styles.sending : ''}`}
+  // 触屏没有悬停:点一下消息弹出操作菜单(桌面仍是悬停按钮)
+  const actions: MenuAction[] = [
+    ...(item.kind === 'text' ? [{ label: '复制', icon: 'copy' as const, action: () => { void navigator.clipboard?.writeText(item.text).catch(() => undefined); } }] : []),
+    ...(owner || self ? [{ label: '删除', icon: 'trash' as const, action: () => onDelete(id) }] : []),
+  ];
+  function tap(event: MouseEvent<HTMLElement>) {
+    if (!matchMedia('(hover: none)').matches || !actions.length || sending) return;
+    if ((event.target as HTMLElement).closest('button, a, input, progress') || window.getSelection()?.toString()) return;
+    setMenu({ x: event.clientX, y: event.clientY });
+  }
+  return <article onClick={tap} className={`${styles.message} ${compact ? styles.compact : ''} ${sending ? styles.sending : ''}`}
     aria-label={item.kind === 'file' ? `${name} 上传了 ${item.name}` : `${name} 的消息`} aria-busy={sending}>
     {compact ? <time className={styles.gutterTime} dateTime={new Date(item.ts).toISOString()}>{formatTime(item.ts)}</time>
       : sender?.avatar ? <img className={styles.avatar} src={sender.avatar} alt={`${name} 的头像`} />
@@ -52,5 +64,6 @@ export function ChatMessage({ id, compact = false, onOpenFile, onDelete }: Props
           : item.state.kind === 'incomplete' ? <span className={styles.delivery}>发送未完成，等待续传。</span> : null}
     </div>
     {owner || self ? <Button className={styles.deleteAction} variant="ghost" icon="trash" label={deleteLabel} onClick={() => onDelete(id)} /> : null}
+    {menu ? <ContextMenu point={menu} actions={actions} onClose={() => setMenu(undefined)} /> : null}
   </article>;
 }
diff --git a/web/src/features/channel/ChatPane.module.css b/web/src/features/channel/ChatPane.module.css
index 1731281..c177019 100644
--- a/web/src/features/channel/ChatPane.module.css
+++ b/web/src/features/channel/ChatPane.module.css
@@ -278,6 +278,11 @@
 }
 
 @media (width <= 899px) {
+  /* 手机顶栏已显示频道名 */
+  .head {
+    display: none;
+  }
+
   .message {
     grid-template-columns: 32px minmax(0, 1fr);
     column-gap: var(--space-2);
@@ -298,8 +303,9 @@
   }
 }
 
+/* 触屏没有悬停:隐藏常驻按钮,点一下消息弹出菜单 */
 @media (hover: none) {
   .deleteAction {
-    opacity: 1;
+    display: none;
   }
 }
diff --git a/web/src/features/channel/MobileDrawer.module.css b/web/src/features/channel/MobileDrawer.module.css
new file mode 100644
index 0000000..0158237
--- /dev/null
+++ b/web/src/features/channel/MobileDrawer.module.css
@@ -0,0 +1,61 @@
+.scroll {
+  display: flex;
+  flex: 1;
+  flex-direction: column;
+  min-height: 0;
+  overflow-y: auto;
+}
+
+.section {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-1);
+  padding: var(--space-3);
+  border-top: 1px solid var(--line);
+}
+
+.section h2 {
+  margin: 0 0 var(--space-1);
+  padding-inline: var(--space-2);
+  color: var(--text-dim);
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.row {
+  display: flex;
+  align-items: center;
+  gap: var(--space-3);
+  min-height: 44px;
+  padding: 0 var(--space-2);
+  border: 0;
+  border-radius: var(--radius-md);
+  background: transparent;
+  color: var(--text);
+  font: inherit;
+  font-size: 14px;
+  text-align: left;
+  cursor: pointer;
+}
+
+.row:hover {
+  background: var(--accent-soft);
+}
+
+.row span {
+  flex: 1;
+}
+
+.row small {
+  color: var(--text-dim);
+  font-size: 12px;
+}
+
+.footer {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  padding: var(--space-2);
+  padding-bottom: max(var(--space-2), env(safe-area-inset-bottom));
+  border-top: 1px solid var(--line);
+}
diff --git a/web/src/features/channel/MobileDrawer.tsx b/web/src/features/channel/MobileDrawer.tsx
new file mode 100644
index 0000000..1dfe79f
--- /dev/null
+++ b/web/src/features/channel/MobileDrawer.tsx
@@ -0,0 +1,48 @@
+import { useChannels } from '@/store/channels';
+import { useWorkspace } from '@/store/workspace';
+import { AccountDock } from '@/features/home/AccountDock';
+import { Icon, type IconName } from '@/ui/Icon';
+import { ThemeMenu } from '@/ui/ThemeMenu';
+import { SpaceHeader, SpaceRail } from './SpaceRail';
+import styles from './MobileDrawer.module.css';
+
+interface Props {
+  rail: { id?: string; onCreate: () => void; onJoin: () => void };
+  onSettings: () => void;
+  /** 频道列表(ThreadSidebar),由 Workspace 组装 */
+  threads: React.ReactNode;
+  onFiles: () => void;
+  onMembers: () => void;
+  onInvite?: () => void;
+  onShare: () => void;
+  onHome: () => void;
+}
+
+function Row({ icon, label, count, onClick }: { icon: IconName; label: string; count?: string; onClick: () => void }) {
+  return <button type="button" className={styles.row} onClick={onClick}>
+    <Icon name={icon} size={18} /><span>{label}</span>{count ? <small>{count}</small> : null}
+  </button>;
+}
+
+/** 手机侧边栏:空间、频道、本频道的文件与成员;账号与外观在底部 */
+export function MobileDrawer({ rail, onSettings, threads, onFiles, onMembers, onInvite, onShare, onHome }: Props) {
+  const used = useWorkspace((s) => s.channel?.membersUsed);
+  const max = useWorkspace((s) => s.channel?.maxMembers);
+  const spaces = useChannels((s) => s.list.length);
+  return <>
+    <SpaceRail {...rail} />
+    <SpaceHeader onSettings={onSettings} />
+    <div className={styles.scroll}>
+      {threads}
+      <nav className={styles.section} aria-label="本频道">
+        <h2>本空间</h2>
+        <Row icon="folder" label="文件" onClick={onFiles} />
+        <Row icon="users" label="成员" count={used !== undefined ? `${used}/${max ?? '—'}` : undefined} onClick={onMembers} />
+        {onInvite ? <Row icon="plus" label="邀请成员" onClick={onInvite} /> : null}
+        <Row icon="share" label="分享" onClick={onShare} />
+        <Row icon="chevronLeft" label={spaces > 1 ? '回到首页' : '返回首页'} onClick={onHome} />
+      </nav>
+    </div>
+    <footer className={styles.footer}><AccountDock inline /><ThemeMenu /></footer>
+  </>;
+}
diff --git a/web/src/features/channel/MobileTopBar.module.css b/web/src/features/channel/MobileTopBar.module.css
new file mode 100644
index 0000000..46c090f
--- /dev/null
+++ b/web/src/features/channel/MobileTopBar.module.css
@@ -0,0 +1,62 @@
+.bar {
+  position: sticky;
+  top: 0;
+  z-index: 10;
+  display: flex;
+  flex-shrink: 0;
+  align-items: center;
+  gap: var(--space-1);
+  min-height: var(--bar-h);
+  padding: 0 var(--space-2);
+  padding-top: env(safe-area-inset-top);
+  border-bottom: 1px solid var(--line);
+  background: var(--glass);
+  /* stylelint-disable-next-line property-no-vendor-prefix */
+  -webkit-backdrop-filter: var(--blur-bar);
+  backdrop-filter: var(--blur-bar);
+}
+
+.raw {
+  border-bottom-color: var(--warn);
+}
+
+.title {
+  flex: 1;
+  min-width: 0;
+  margin: 0;
+  overflow: hidden;
+  font-size: 16px;
+  font-weight: 600;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.lock {
+  display: inline-flex;
+  color: var(--ok);
+}
+
+.warn {
+  padding: 1px var(--space-2);
+  border-radius: var(--radius-sm);
+  background: var(--warn-soft);
+  color: var(--warn);
+  font-size: 12px;
+}
+
+.conn {
+  font-size: 12px;
+}
+
+.reconnecting {
+  color: var(--busy);
+}
+
+.offline {
+  color: var(--danger);
+}
+
+.active {
+  background: var(--accent-soft);
+  color: var(--busy);
+}
diff --git a/web/src/features/channel/MobileTopBar.tsx b/web/src/features/channel/MobileTopBar.tsx
new file mode 100644
index 0000000..19583d6
--- /dev/null
+++ b/web/src/features/channel/MobileTopBar.tsx
@@ -0,0 +1,30 @@
+import { useWorkspace } from '@/store/workspace';
+import { Button } from '@/ui/Button';
+import { Icon } from '@/ui/Icon';
+import styles from './MobileTopBar.module.css';
+
+interface Props {
+  /** 聊天页是 ≡(开侧边栏);文件、成员页是 ‹(回聊天) */
+  view: 'chat' | 'files' | 'members';
+  title: string;
+  searchOpen: boolean;
+  filtering: boolean;
+  onMenu: () => void;
+  onBack: () => void;
+  onToggleSearch: () => void;
+  onMore: () => void;
+}
+
+/** 手机顶栏:只放最必要的几项,其余收进「更多」 */
+export function MobileTopBar({ view, title, searchOpen, filtering, onMenu, onBack, onToggleSearch, onMore }: Props) {
+  const connection = useWorkspace((s) => s.connection);
+  const raw = useWorkspace((s) => s.channel?.mode === 'raw');
+  return <header className={`${styles.bar} ${raw ? styles.raw : ''}`}>
+    {view === 'chat' ? <Button variant="ghost" icon="menu" label="打开侧边栏" onClick={onMenu} /> : <Button variant="ghost" icon="chevronLeft" label="返回聊天" onClick={onBack} />}
+    <h1 className={styles.title}>{title}</h1>
+    {raw ? <span className={styles.warn}>明文</span> : <span className={styles.lock} title="端到端加密"><Icon name="lock" size={14} /></span>}
+    {connection === 'online' ? null : <span className={`${styles.conn} ${styles[connection]}`} role="status">{connection === 'offline' ? '离线' : '重连中'}</span>}
+    <Button variant="ghost" icon="search" label="搜索文件" aria-pressed={searchOpen} className={filtering ? styles.active : undefined} onClick={onToggleSearch} />
+    <Button variant="ghost" icon="more" label="更多" onClick={onMore} />
+  </header>;
+}
diff --git a/web/src/features/channel/SpaceRail.module.css b/web/src/features/channel/SpaceRail.module.css
index ba70d06..e51bec7 100644
--- a/web/src/features/channel/SpaceRail.module.css
+++ b/web/src/features/channel/SpaceRail.module.css
@@ -88,11 +88,6 @@
 }
 
 @media (width <= 899px) {
-  /* 手机顶栏已有空间名与设置入口 */
-  .header {
-    display: none;
-  }
-
   .rail {
     flex-direction: row;
     justify-content: flex-start;
diff --git a/web/src/features/channel/ThreadSidebar.module.css b/web/src/features/channel/ThreadSidebar.module.css
index 0678498..ae8e533 100644
--- a/web/src/features/channel/ThreadSidebar.module.css
+++ b/web/src/features/channel/ThreadSidebar.module.css
@@ -318,16 +318,6 @@
     opacity: 1;
   }
 
-  .threads {
-    flex-direction: row;
-    overflow-x: auto;
-  }
-
-  .thread {
-    flex: 0 0 auto;
-    max-width: 220px;
-  }
-
   .folders {
     max-height: 120px;
     overflow-y: auto;
@@ -338,3 +328,22 @@
     opacity: 1;
   }
 }
+
+/* 勾选项:框在左、文字在右,同一行 */
+.channelEditor .check {
+  flex-direction: row;
+  align-items: center;
+  gap: var(--space-2);
+  min-height: 36px;
+  color: var(--text);
+  font-size: 14px;
+}
+
+.channelEditor .check input {
+  flex: 0 0 18px;
+  width: 18px;
+  min-height: 18px;
+  height: 18px;
+  padding: 0;
+  accent-color: var(--accent);
+}
diff --git a/web/src/features/channel/ThreadSidebar.tsx b/web/src/features/channel/ThreadSidebar.tsx
index 737f041..b8331dc 100644
--- a/web/src/features/channel/ThreadSidebar.tsx
+++ b/web/src/features/channel/ThreadSidebar.tsx
@@ -91,8 +91,8 @@ export function ThreadSidebar(props: Props) {
           <option value="">未分组</option>{props.groups.map((group) => <option key={group.id} value={group.id}>{group.name}</option>)}
         </select></label> : null}
         {edit.kind === 'channel' && edit.id && props.owner ? <>
-          <label><input type="checkbox" checked={chatHistory} onChange={event => setChatHistory(event.target.checked)} />新成员可读历史聊天</label>
-          <label><input type="checkbox" checked={filesHistory} onChange={event => setFilesHistory(event.target.checked)} />新成员可读历史文件</label>
+          <label className={styles.check}><input type="checkbox" checked={chatHistory} onChange={event => setChatHistory(event.target.checked)} />新成员可读历史聊天</label>
+          <label className={styles.check}><input type="checkbox" checked={filesHistory} onChange={event => setFilesHistory(event.target.checked)} />新成员可读历史文件</label>
         </> : null}
         {error ? <p className={styles.error} role="alert">{error}</p> : null}
         <div className={`${styles.groupActions} ${styles.modalActions}`}>
diff --git a/web/src/features/channel/Workspace.module.css b/web/src/features/channel/Workspace.module.css
index cff32bd..a00e8f3 100644
--- a/web/src/features/channel/Workspace.module.css
+++ b/web/src/features/channel/Workspace.module.css
@@ -65,38 +65,11 @@
   padding-inline: env(safe-area-inset-left) env(safe-area-inset-right);
 }
 
-.mobile .navigation {
-  max-height: 30dvh;
-  flex-shrink: 0;
-  border-right: 0;
-}
-
 .mobileContent {
   flex: 1;
   overflow: hidden;
 }
 
-.tabs {
-  display: flex;
-  flex-shrink: 0;
-  border-bottom: 1px solid var(--line);
-}
-
-.tabs button {
-  flex: 1;
-  min-height: 44px;
-  border: 0;
-  background: var(--surface);
-  color: var(--text-dim);
-  font: inherit;
-  cursor: pointer;
-}
-
-.tabs button[aria-pressed="true"] {
-  border-bottom: 2px solid var(--accent);
-  color: var(--text);
-}
-
 .pendingCatalog {
   padding: var(--space-2) var(--space-3);
   border-top: 1px solid var(--line);
diff --git a/web/src/features/channel/Workspace.tsx b/web/src/features/channel/Workspace.tsx
index 3ba0b6f..338a681 100644
--- a/web/src/features/channel/Workspace.tsx
+++ b/web/src/features/channel/Workspace.tsx
@@ -1,4 +1,4 @@
-import { lazy, Suspense, useCallback, useState, type CSSProperties, type DragEvent } from 'react';
+import { lazy, Suspense, useCallback, useEffect, useState, type CSSProperties, type DragEvent } from 'react';
 import { useShallow } from 'zustand/react/shallow';
 import { channelPath, navigate, sharePath } from '@/app/navigation';
 import { useDownload } from '@/features/item/download';
@@ -10,7 +10,11 @@ import type { FileUploadOptions } from '@/core-bridge/types';
 import type { ClipboardPayload } from '@/lib/clipboard';
 import { Sheet } from '@/ui/Sheet';
 import { Button } from '@/ui/Button';
+import { Drawer } from '@/ui/Drawer';
+import { Icon, type IconName } from '@/ui/Icon';
 import { SpaceHeader, SpaceRail } from './SpaceRail';
+import { MobileDrawer } from './MobileDrawer';
+import { MobileTopBar } from './MobileTopBar';
 import { ThreadSidebar } from './ThreadSidebar';
 import { ChatPane } from './ChatPane';
 import { FileExplorer } from './FileExplorer';
@@ -66,6 +70,8 @@ export function Workspace({ onCreateChannel }: { onCreateChannel: () => void })
   const [mobileView, setMobileView] = useState<'chat' | 'files' | 'members'>('chat');
   const [sideTab, setSideTab] = useState<SideTab>('files');
   const [inviteOpen, setInviteOpen] = useState(false);
+  const [drawerOpen, setDrawerOpen] = useState(false);
+  const [moreOpen, setMoreOpen] = useState(false);
   const [memberRevision, setMemberRevision] = useState(0);
   const [fileWidth, setFileWidth] = useState<number>();
   const [upload, setUpload] = useState<{ files: File[]; threadId: string; folderId?: string }>();
@@ -110,11 +116,19 @@ export function Workspace({ onCreateChannel }: { onCreateChannel: () => void })
   }
   function drop(event: DragEvent) { event.preventDefault(); setDragging(false); requestFiles([...event.dataTransfer.files]); }
   function deleteItem(id: string) { void deleteFiles([id]).catch((cause: unknown) => useWorkspace.setState({ error: cause instanceof Error ? cause.message : '删除失败' })); }
+  // 手机聊天页的账号入口在侧边栏,全局浮窗据此让位
+  useEffect(() => {
+    if (desktop) return;
+    document.documentElement.dataset.chatShell = '';
+    return () => { delete document.documentElement.dataset.chatShell; };
+  }, [desktop]);
+  const channelId = channel?.id;
+  useEffect(() => { setDrawerOpen(false); }, [channelId]);
   const rail = <SpaceRail id={channel?.id} onCreate={onCreateChannel} onJoin={() => setScanOpen(true)} />;
-  const navigation = <><SpaceHeader onSettings={() => setSettingsOpen(true)} />
-    <ThreadSidebar threads={threads} groups={groups} selectedThreadId={activeThreadId} enabled={Boolean(channel?.canManageStructure)} owner={channel?.role === 'owner'} onHistory={setChannelHistory} onSelectThread={selectThread} onCreateThread={createThread} onRenameThread={renameThread}
-      onCreateGroup={createGroup} onRenameGroup={renameGroup} onGroupThread={groupThread} />
-    {desktop ? <Notepad /> : null}</>;
+  const threadSidebar = <ThreadSidebar threads={threads} groups={groups} selectedThreadId={activeThreadId} enabled={Boolean(channel?.canManageStructure)} owner={channel?.role === 'owner'} onHistory={setChannelHistory}
+    onSelectThread={(id) => { selectThread(id); setDrawerOpen(false); setMobileView('chat'); }} onCreateThread={createThread} onRenameThread={renameThread}
+    onCreateGroup={createGroup} onRenameGroup={renameGroup} onGroupThread={groupThread} />;
+  const navigation = <><SpaceHeader onSettings={() => setSettingsOpen(true)} />{threadSidebar}{desktop ? <Notepad /> : null}</>;
   const chat = <ChatPane threadName={activeThread?.name ?? '选择频道'} ids={messages} enabled={enabled} onSend={(text) => sendText(text, activeThreadId)} onDelete={deleteItem} onOpenFile={setPreviewId} onFiles={requestFiles} />;
   const explorer = <>
     <FilterBar filter={filter} searchOpen={searchOpen} onChange={setFilter} />
@@ -129,13 +143,28 @@ export function Workspace({ onCreateChannel }: { onCreateChannel: () => void })
     {restricted.length ? <div className={styles.pendingCatalog}><span>等待同步文件目录</span>{restricted.map((id) => <Button variant="ghost" key={id} onClick={() => setPreviewId(id)}>查看受限文件</Button>)}</div> : null}
   </>;
   const members = <MembersPane owner={owner} refreshKey={memberRevision} onInvite={() => setInviteOpen(true)} />;
+  function goMobile(view: 'chat' | 'files' | 'members') { setMobileView(view); setDrawerOpen(false); }
+  const moreRows: { icon: IconName; label: string; run: () => void }[] = [
+    { icon: 'settings', label: '空间设置', run: () => setSettingsOpen(true) },
+    { icon: 'share', label: '分享', run: () => setPanelOpen(true) },
+    ...(owner ? [{ icon: 'plus' as const, label: '邀请成员', run: () => setInviteOpen(true) }] : []),
+  ];
+  const mobileTitle = mobileView === 'files' ? '文件' : mobileView === 'members' ? '成员' : `# ${activeThread?.name ?? '选择频道'}`;
   function openMembers() { if (desktop) setSideTab('members'); else setMobileView('members'); }
   return <div className={desktop ? styles.desktop : styles.mobile} style={fileWidth ? { '--files-width': `${fileWidth}px` } as CSSProperties : undefined}
     onDropCapture={() => setDragging(false)} onDragEndCapture={() => setDragging(false)}
     onDragOver={(event) => { if (event.dataTransfer.types.includes('Files')) { event.preventDefault(); setDragging(true); } }} onDragLeave={() => setDragging(false)} onDrop={drop}>
-    <TopBar onBack={() => navigate('/')} onOpenMembers={openMembers} onInvite={owner ? () => { openMembers(); setInviteOpen(true); } : undefined} onOpenPanel={() => setPanelOpen(true)} onOpenSettings={() => setSettingsOpen(true)} searchOpen={searchOpen} filtering={isFiltering(filter)} onToggleSearch={() => { setSearchOpen((value) => !value); if (!desktop) setMobileView('files'); }} />
+    {desktop ? <TopBar onBack={() => navigate('/')} onOpenMembers={openMembers} onInvite={owner ? () => { openMembers(); setInviteOpen(true); } : undefined} onOpenPanel={() => setPanelOpen(true)} onOpenSettings={() => setSettingsOpen(true)} searchOpen={searchOpen} filtering={isFiltering(filter)} onToggleSearch={() => { setSearchOpen((value) => !value); if (!desktop) setMobileView('files'); }} /> : <MobileTopBar view={mobileView} title={mobileTitle} searchOpen={searchOpen} filtering={isFiltering(filter)} onMenu={() => setDrawerOpen(true)} onBack={() => setMobileView('chat')}
+      onToggleSearch={() => { setSearchOpen((value) => !value); setMobileView('files'); }} onMore={() => setMoreOpen(true)} />}
     {desktop ? <><aside className={styles.rail}>{rail}</aside><aside className={styles.navigation} data-space-nav>{navigation}</aside><main className={styles.center}>{chat}</main><FilePaneResize width={fileWidth} onWidth={setFileWidth} /><aside className={styles.files} data-file-pane><PaneTabs tab={sideTab} memberCount={channel?.membersUsed} onTab={setSideTab} />{sideTab === 'files' ? explorer : members}</aside></>
-      : <>{rail}<aside className={styles.navigation}>{navigation}</aside><nav className={styles.tabs} aria-label="频道视图"><button type="button" aria-pressed={mobileView === 'chat'} onClick={() => setMobileView('chat')}>聊天</button><button type="button" aria-pressed={mobileView === 'files'} onClick={() => setMobileView('files')}>文件</button><button type="button" aria-pressed={mobileView === 'members'} onClick={() => setMobileView('members')}>成员</button></nav><main className={styles.mobileContent}>{mobileView === 'chat' ? chat : mobileView === 'files' ? explorer : members}</main></>}
+      : <main className={styles.mobileContent}>{mobileView === 'chat' ? chat : mobileView === 'files' ? explorer : members}</main>}
+    {/* 弹层打开时抽屉留在下面:同时关抽屉(history.back)会把刚压入的弹层历史一并弹掉 */}
+    {!desktop && drawerOpen ? <Drawer label="侧边栏" onClose={() => setDrawerOpen(false)}>
+      <MobileDrawer rail={{ id: channel?.id, onCreate: onCreateChannel, onJoin: () => setScanOpen(true) }}
+        onSettings={() => setSettingsOpen(true)} threads={threadSidebar} onFiles={() => goMobile('files')} onMembers={() => goMobile('members')}
+        onInvite={owner ? () => setInviteOpen(true) : undefined} onShare={() => setPanelOpen(true)} onHome={() => navigate('/')} />
+    </Drawer> : null}
+    {!desktop && moreOpen ? <Sheet title="更多" onClose={() => setMoreOpen(false)}>{moreRows.map((row) => <Button key={row.label} variant="ghost" onClick={() => { setMoreOpen(false); row.run(); }}><Icon name={row.icon} size={18} />{row.label}</Button>)}</Sheet> : null}
     {error ? <div className={styles.error} role="alert">{error}</div> : null}
     {inviteOpen ? <InviteSheet onClose={() => setInviteOpen(false)} onInvited={() => setMemberRevision((value) => value + 1)} /> : null}
     {panelOpen ? <Sheet title="分享" onClose={() => setPanelOpen(false)}><SharePanel /></Sheet> : null}
diff --git a/web/src/features/home/AccountDock.module.css b/web/src/features/home/AccountDock.module.css
index c1f8033..b4a02e1 100644
--- a/web/src/features/home/AccountDock.module.css
+++ b/web/src/features/home/AccountDock.module.css
@@ -127,3 +127,32 @@
     min-height: 40px;
   }
 }
+
+/* 手机聊天页由侧边栏承载账号入口,浮窗让位 */
+@media (width <= 899px) {
+  /* stylelint-disable-next-line selector-pseudo-class-no-unknown */
+  :global([data-chat-shell]) .dock:not(.inline) {
+    display: none;
+  }
+}
+
+.inline {
+  position: static;
+  flex: 1;
+  width: auto;
+  min-width: 0;
+  padding: 0;
+  border: 0;
+  background: transparent;
+}
+
+.inline .profile {
+  flex: 1;
+  width: auto;
+  justify-content: flex-start;
+  padding: var(--space-1) var(--space-2);
+}
+
+.inline .profileText {
+  display: flex;
+}
diff --git a/web/src/features/home/AccountDock.tsx b/web/src/features/home/AccountDock.tsx
index bd801d8..25d3f37 100644
--- a/web/src/features/home/AccountDock.tsx
+++ b/web/src/features/home/AccountDock.tsx
@@ -5,7 +5,8 @@ import { Sheet } from '@/ui/Sheet';
 import { AccountSettings } from './AccountSettings';
 import styles from './AccountDock.module.css';
 
-export function AccountDock() {
+/** inline:嵌进手机侧边栏底部,不再浮在页面上 */
+export function AccountDock({ inline = false }: { inline?: boolean }) {
   const [settingsOpen, setSettingsOpen] = useState(false);
   const username = useAccount((s) => s.username);
   const personal = useAccount((s) => s.personal);
@@ -17,7 +18,7 @@ export function AccountDock() {
   const openSettings = () => setSettingsOpen(true);
 
   return <>
-    <section className={styles.dock} aria-label="当前账号">
+    <section className={`${styles.dock} ${inline ? styles.inline : ''}`} aria-label="当前账号">
       <button className={styles.profile} type="button" onClick={openSettings} aria-label={`打开 ${displayName} 的账号设置`}>
         {personal?.avatar ? <img className={styles.avatar} src={personal.avatar} alt="" /> : <span className={styles.avatarFallback}>{initial}</span>}
         <span className={styles.profileText}><strong className={styles.profileName}>{displayName}</strong><span className={styles.username}>{subtitle}</span></span>
diff --git a/web/src/ui/Drawer.module.css b/web/src/ui/Drawer.module.css
new file mode 100644
index 0000000..d0e0474
--- /dev/null
+++ b/web/src/ui/Drawer.module.css
@@ -0,0 +1,40 @@
+.scrim {
+  position: fixed;
+  inset: 0;
+  z-index: 50;
+  background: var(--scrim);
+  animation: drawer-scrim-in 0.15s ease-out;
+}
+
+.drawer {
+  display: flex;
+  flex-direction: column;
+  width: min(320px, 86vw);
+  height: 100%;
+  padding-top: env(safe-area-inset-top);
+  border-right: 1px solid var(--line);
+  background: var(--bg);
+  box-shadow: var(--shadow-sheet);
+  outline: none;
+  animation: drawer-in 0.2s ease-out;
+}
+
+@keyframes drawer-scrim-in {
+  from {
+    opacity: 0;
+  }
+}
+
+@keyframes drawer-in {
+  from {
+    translate: -24px 0;
+    opacity: 0;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .scrim,
+  .drawer {
+    animation: none;
+  }
+}
diff --git a/web/src/ui/Drawer.tsx b/web/src/ui/Drawer.tsx
new file mode 100644
index 0000000..2ae7f14
--- /dev/null
+++ b/web/src/ui/Drawer.tsx
@@ -0,0 +1,29 @@
+import { useEffect, useRef, type ReactNode } from 'react';
+import { createPortal } from 'react-dom';
+import { useBackToClose } from '@/lib/useBackToClose';
+import styles from './Drawer.module.css';
+
+interface Props { label: string; onClose: () => void; children: ReactNode }
+
+/** 手机的左侧抽屉:遮罩是纯色,返回键关闭(与 Sheet 一致) */
+export function Drawer({ label, onClose, children }: Props) {
+  const ref = useRef<HTMLDivElement>(null);
+  const close = useRef(onClose);
+  useEffect(() => { close.current = onClose; }, [onClose]);
+  useBackToClose(onClose);
+  useEffect(() => {
+    const prev = document.activeElement as HTMLElement | null;
+    ref.current?.focus();
+    const onKey = (event: KeyboardEvent) => { if (event.key === 'Escape') close.current(); };
+    window.addEventListener('keydown', onKey);
+    return () => { window.removeEventListener('keydown', onKey); prev?.focus(); };
+  }, []);
+  return createPortal(
+    <div className={styles.scrim} onClick={onClose}>
+      <div ref={ref} tabIndex={-1} role="dialog" aria-modal="true" aria-label={label} className={styles.drawer} onClick={(event) => event.stopPropagation()}>
+        {children}
+      </div>
+    </div>,
+    document.body,
+  );
+}
diff --git a/web/src/ui/Icon.tsx b/web/src/ui/Icon.tsx
index a7a2e4c..6af13a1 100644
--- a/web/src/ui/Icon.tsx
+++ b/web/src/ui/Icon.tsx
@@ -21,6 +21,8 @@ const PATHS = {
   phone: 'M8 3h8v18H8z M11 18h2',
   tablet: 'M5 4h14v16H5z M11 17h2',
   more: 'M5 12h.01 M12 12h.01 M19 12h.01',
+  menu: 'M4 7h16 M4 12h16 M4 17h16',
+  users: 'M9 11a3 3 0 100-6 3 3 0 000 6z M3 19a6 6 0 0112 0 M16 6a3 3 0 010 6 M18 19a5 5 0 00-3-4.6',
   undo: 'M9 14L4 9l5-5 M4 9h10a6 6 0 010 12h-3',
   warn: 'M12 4l9 16H3z M12 10v4 M12 17h.01',
   sun: 'M12 8a4 4 0 100 8 4 4 0 000-8z M12 2v2 M12 20v2 M2 12h2 M20 12h2 M5 5l1.5 1.5 M17.5 17.5L19 19 M5 19l1.5-1.5 M17.5 6.5L19 5',