feat: 界面全部改为中文

- 侧边栏导航：仪表盘、登录、内容浏览、发布、互动、API 测试、设置
- 7 个页面所有按钮、标签、提示、错误信息改为中文
- API 端点列表分类改为中文（登录、内容、发布、互动）
- 组件内文本：展开/收起、复制、点赞、收藏、评论等
- 页面标题改为 Social MCP - 管理后台

web/src/pages/DashboardPage.tsx

@@ -15,9 +15,9 @@ export function DashboardPage() {
   return (
     <div className="space-y-6 max-w-5xl">
       <div className="flex items-center justify-between">
-        <h1 className="text-2xl font-bold">Dashboard</h1>
+        <h1 className="text-2xl font-bold">仪表盘</h1>
         <Button variant="ghost" size="sm" onClick={() => void refreshHealth()}>
-          Refresh
+          刷新
         </Button>
       </div>
 
@@ -25,24 +25,24 @@ export function DashboardPage() {
       <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4">
         {/* Server Status */}
         <Card>
-          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">Server</div>
+          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">服务器</div>
           {healthLoading ? (
             <Spinner size="sm" />
           ) : health ? (
             <div className="space-y-1">
               <Badge variant={health.healthy ? 'success' : 'danger'}>
-                {health.healthy ? 'Healthy' : 'Unhealthy'}
+                {health.healthy ? '正常' : '异常'}
               </Badge>
               <p className="text-sm text-dark-muted">v{health.version}</p>
             </div>
           ) : (
-            <Badge variant="danger">Offline</Badge>
+            <Badge variant="danger">离线</Badge>
           )}
         </Card>
 
         {/* Uptime */}
         <Card>
-          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">Uptime</div>
+          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">运行时间</div>
           {health ? (
             <p className="text-xl font-mono font-bold text-dark-text">{formatUptime(health.uptime)}</p>
           ) : (
@@ -52,13 +52,13 @@ export function DashboardPage() {
 
         {/* Login Status */}
         <Card>
-          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">Xiaohongshu Login</div>
+          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">小红书登录</div>
           {loginLoading ? (
             <Spinner size="sm" />
           ) : loginStatus ? (
             <div className="space-y-1">
               <Badge variant={loginStatus.loggedIn ? 'success' : 'warning'}>
-                {loginStatus.loggedIn ? 'Logged In' : 'Not Logged In'}
+                {loginStatus.loggedIn ? '已登录' : '未登录'}
               </Badge>
               {loginStatus.username && (
                 <p className="text-sm text-dark-muted">{loginStatus.username}</p>
@@ -69,18 +69,18 @@ export function DashboardPage() {
               onClick={() => void refreshLogin()}
               className="text-xs text-dark-accent hover:underline"
             >
-              Click to check
+              点击检查
             </button>
           )}
         </Card>
 
         {/* Memory */}
         <Card>
-          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">Memory</div>
+          <div className="text-xs text-dark-muted uppercase tracking-wider mb-2">内存</div>
           {health ? (
             <div className="space-y-1">
               <p className="text-xl font-mono font-bold text-dark-text">{health.memory.heapUsed} MB</p>
-              <p className="text-xs text-dark-muted">of {health.memory.heapTotal} MB heap</p>
+              <p className="text-xs text-dark-muted">共 {health.memory.heapTotal} MB 堆内存</p>
             </div>
           ) : (
             <p className="text-dark-muted">-</p>
@@ -91,13 +91,13 @@ export function DashboardPage() {
       {/* Plugin Health */}
       {health && Object.keys(health.plugins).length > 0 && (
         <Card>
-          <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-3">Plugins</h2>
+          <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-3">插件</h2>
           <div className="space-y-2">
             {Object.entries(health.plugins).map(([name, info]) => (
               <div key={name} className="flex items-center justify-between py-1">
                 <span className="text-sm">{name}</span>
                 <Badge variant={info.healthy ? 'success' : 'danger'}>
-                  {info.healthy ? 'Healthy' : info.message || 'Unhealthy'}
+                  {info.healthy ? '正常' : info.message || '异常'}
                 </Badge>
               </div>
             ))}
@@ -107,19 +107,19 @@ export function DashboardPage() {
 
       {/* Quick actions */}
       <Card>
-        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-3">Quick Actions</h2>
+        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-3">快捷操作</h2>
         <div className="flex flex-wrap gap-3">
           <Button variant="secondary" size="sm" onClick={() => navigate('/login')}>
-            Manage Login
+            管理登录
           </Button>
           <Button variant="secondary" size="sm" onClick={() => navigate('/browser')}>
-            Browse Content
+            浏览内容
           </Button>
           <Button variant="secondary" size="sm" onClick={() => navigate('/publish')}>
-            Publish Note
+            发布笔记
           </Button>
           <Button variant="secondary" size="sm" onClick={() => navigate('/api-tester')}>
-            API Tester
+            API 测试
           </Button>
         </div>
       </Card>
@@ -128,7 +128,7 @@ export function DashboardPage() {
       {health && (
         <Card>
           <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-3">
-            Raw Health Data
+            原始健康数据
           </h2>
           <pre className="bg-dark-bg border border-dark-border rounded-lg p-4 text-xs text-dark-text overflow-auto font-mono max-h-64">
             {JSON.stringify(health, null, 2)}