diff --git a/ui/src/main.tsx b/ui/src/main.tsx
index 980e724..d269da8 100644
--- a/ui/src/main.tsx
+++ b/ui/src/main.tsx
@@ -89,7 +89,7 @@ function App(){
  if(parts[1]==='launcher')return <Launcher plugins={status.database.plugins} safeMode={status.database.safeMode} config={status.database.launcher} favorites={status.database.steamFavorites??[]} localFavorites={status.database.launcherFavorites??[]} order={status.database.launcherOrder??[]} refresh={refresh}/>;
  if(parts[1]==='notifications')return <NotificationCenter items={status.notifications} plugins={status.database.plugins} safeMode={status.database.safeMode} refresh={refresh}/>;
  if(windowPlugin){const p=status.database.plugins[windowPlugin];return <div className="app plugin-window">{p?.enabled&&!status.database.safeMode?<PluginFrame plugin={windowPlugin} entry={parts[3]}/>:<div className="empty"><p>{t("插件已停用或正在启动。")}</p><button onClick={()=>void action(()=>api('window.close',{plugin:windowPlugin,window:parts[3]}))}>{t("关闭")}</button></div>}{error&&<p className="error">{error}</p>}</div>;}
- return <div className={`app ${managerMode?'manager':'quick'}`}><header className="shell-header"><strong className="brand-title"><Brand wordmark/></strong>{managerMode?<><ManagerSwitcher section={managerSection} onChange={switchManager}/>{managerSection==='plugins'&&<button className="primary" onClick={()=>setImporting(true)}><Icon name="download"/>{t("安装插件")}</button>}<button className="icon-button" aria-label={t("关闭管理窗口")} onClick={()=>void api('host.manager.close')}><Icon name="close"/></button></>:<><button className="icon-button quick-library-button" aria-label={t("插件库")} onClick={()=>void action(()=>api('host.manager.open',{page:'catalog'}))}><Icon name="store"/><span>{t("插件库")}</span></button><button className="icon-button" aria-label={t("关闭菜单")} onClick={()=>void api('host.menu.close')}><Icon name="close"/></button></>}</header>{error&&<p className="error" role="alert">{error}<button onClick={()=>setError('')}>×</button></p>}{status.database.safeMode&&<p className="banner">{t("安全模式：第三方插件暂停运行。")}</p>}
+ return <div className={`app ${managerMode?'manager':'quick'}`}><header className="shell-header"><strong className="brand-title"><Brand wordmark/></strong>{managerMode?<>{managerSection==='plugins'&&<button className="primary manager-install-button" onClick={()=>setImporting(true)}><Icon name="download" size={20}/>{t("安装插件")}</button>}<ManagerSwitcher section={managerSection} onChange={switchManager}/><button className="icon-button" aria-label={t("关闭管理窗口")} onClick={()=>void api('host.manager.close')}><Icon name="close"/></button></>:<><button className="icon-button quick-library-button" aria-label={t("插件库")} onClick={()=>void action(()=>api('host.manager.open',{page:'catalog'}))}><Icon name="store"/><span>{t("插件库")}</span></button><button className="icon-button" aria-label={t("关闭菜单")} onClick={()=>void api('host.menu.close')}><Icon name="close"/></button></>}</header>{error&&<p className="error" role="alert">{error}<button onClick={()=>setError('')}>×</button></p>}{status.database.safeMode&&<p className="banner">{t("安全模式：第三方插件暂停运行。")}</p>}
  {selected?<><div className="page-title"><button onClick={()=>setPage(null)}>{t("‹ 返回")}</button><strong>{selected.manifest.name}</strong><button onClick={()=>void action(()=>api('plugin.favorite',{plugin:page,favorite:!selected.favorite}))}>{selected.favorite?'★':'☆'}</button>{managerMode&&<button onClick={()=>setManage(selected)}>{t("管理")}</button>}</div>{selected.enabled&&!status.database.safeMode&&selected.manifest.ui.quickPage?<PluginFrame plugin={page!}/>:<p className="empty">{t("插件已停用、处于安全模式或没有快捷页面。")}</p>}</>:<div className={`workspace ${managerMode&&(tab==='terminal'||tab==='files')?'tools-workspace':''}`}><nav aria-label={t("主导航")}>{(managerMode?(managerSection==='terminal'||managerSection==='files'?[]:managerSection==='settings'?[['settings',t('通用'),'settings'],['launcher-settings',t('启动台'),'launcher'],['updates',t('更新'),'refresh'],['about',t('关于'),'info']]:apkPanel?[['apk',t('应用'),'download'],['apk-containers',t('容器'),'plugins'],['apk-cleanup',t('数据清理'),'settings'],['apk-settings',t('设置'),'settings']]:[['installed',t("已安装"),'plugins'],['catalog',t("插件库"),'download'],['sources',t("插件源导航"),'link'],['notification-settings',t("通知设置导航"),'bell']]):[['favorites',t("常用"),'star'],['installed',t("已安装"),'plugins'],['notifications',t("通知"),'bell'],['settings',t("设置"),'settings']]).map(([key,label,icon])=><button className={tab===key?'active':''} aria-current={tab===key?'page':undefined} key={key} onClick={()=>key==='catalog'?void loadCatalog():(setTab(key),history.replaceState(null,'',location.pathname+location.search+'#'+key))}>{icon==='bell'?<IconBell size={24} stroke={1.8}/>:icon==='launcher'?<IconLayoutGrid size={24} stroke={1.8}/>:<Icon name={icon as any}/>}<span>{label}{key==='notifications'&&!!status.notificationBadge&&<small className="notification-count">{status.notificationBadge!>99?'99+':status.notificationBadge}</small>}</span></button>)}{managerMode&&<div className="nav-foot"><span>{apkPanel?t("Lepton 侧载管理"):<>{plugins.length}{t("个已安装插件")}</>}</span><small>{status.version}</small></div>}</nav><main className={`content ${managerMode&&tab==='files'?'file-content':managerMode&&tab==='terminal'?'terminal-content':''}`}>
  {(tab==='favorites'||tab==='installed')&&<>
  {managerMode&&<div className="list-heading"><div><h1>{t("已安装")}</h1><p>{plugins.length}{t("个插件，")}{plugins.filter(p=>p.enabled).length}{t("个已启用")}</p></div><div className="search-field"><Icon name="search"/><input aria-label={t("搜索已安装插件")} placeholder={t("搜索插件")} value={query} onChange={e=>setQuery(e.target.value)}/></div></div>}
diff --git a/ui/src/style.css b/ui/src/style.css
index d57c5f2..9a30276 100644
--- a/ui/src/style.css
+++ b/ui/src/style.css
@@ -193,3 +193,5 @@ button{overflow-wrap:anywhere}
 
 /* Tint layers preserve the shell alpha; do not add opaque scrolling surfaces. */
 @media(prefers-reduced-transparency:reduce){:root{--bg:#121212;--surface:#1a1a1a;--overlay-bg:#121212;--manager-content-tint:#1a1a1c;--manager-chrome-tint:#202022}}
+
+.manager .shell-header .manager-install-button{min-height:44px;padding:8px 14px;font-size:18px;gap:8px;white-space:nowrap;flex:none}