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/SettingsPage.tsx

@@ -10,49 +10,49 @@ export function SettingsPage() {
 
   return (
     <div className="max-w-2xl space-y-6">
-      <h1 className="text-2xl font-bold">Settings</h1>
+      <h1 className="text-2xl font-bold">设置</h1>
 
       {/* Server Connection */}
       <Card>
-        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-4">Server Connection</h2>
+        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-4">服务器连接</h2>
         <div className="space-y-4">
           <Input
-            label="Server URL"
+            label="服务器地址"
             value={serverUrl}
             onChange={(e) => setServerUrl(e.target.value)}
-            placeholder="Leave empty for same-origin (default)"
+            placeholder="留空则使用同源地址（默认）"
           />
           <p className="text-xs text-dark-muted">
-            Leave empty when the dashboard is served by the same Express server.
-            Set to e.g. <code className="text-dark-accent">http://192.168.1.100:3000</code> for remote servers.
+            当 Dashboard 由同一个 Express 服务器提供时留空。设置为例如{' '}
+            <code className="text-dark-accent">http://192.168.1.100:3000</code> 用于远程服务器。
           </p>
         </div>
       </Card>
 
       {/* Authentication */}
       <Card>
-        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-4">Authentication</h2>
+        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-4">认证</h2>
         <div className="space-y-4">
           <Input
             label="Bearer Token"
             type="password"
             value={token}
             onChange={(e) => setToken(e.target.value)}
-            placeholder="Enter your API token"
+            placeholder="输入 API Token"
           />
           <p className="text-xs text-dark-muted">
-            Token from <code className="text-dark-accent">BEARER_TOKEN</code> environment variable or{' '}
-            <code className="text-dark-accent">.social-mcp/bearer-token</code> file.
+            Token 来自环境变量 <code className="text-dark-accent">BEARER_TOKEN</code> 或文件{' '}
+            <code className="text-dark-accent">.social-mcp/bearer-token</code>。
           </p>
           <div className="flex gap-2">
             <Button
               variant="secondary"
               size="sm"
               onClick={() => {
-                toast('success', 'Settings saved');
+                toast('success', '设置已保存');
               }}
             >
-              Save
+              保存
             </Button>
             <Button
               variant="ghost"
@@ -60,10 +60,10 @@ export function SettingsPage() {
               onClick={() => {
                 setToken('');
                 setServerUrl('');
-                toast('info', 'Settings cleared');
+                toast('info', '设置已清除');
               }}
             >
-              Clear All
+              全部清除
             </Button>
           </div>
         </div>
@@ -71,11 +71,11 @@ export function SettingsPage() {
 
       {/* About */}
       <Card>
-        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-4">About</h2>
+        <h2 className="text-sm font-semibold text-dark-muted uppercase tracking-wider mb-4">关于</h2>
         <div className="space-y-2 text-sm text-dark-muted">
-          <p><span className="text-dark-text">Social MCP</span> — Multi-platform social media automation</p>
-          <p>Version: 0.1.0</p>
-          <p>Stack: React 19 + TypeScript + Tailwind CSS</p>
+          <p><span className="text-dark-text">Social MCP</span> — 多平台社交媒体自动化</p>
+          <p>版本：0.1.0</p>
+          <p>技术栈：React 19 + TypeScript + Tailwind CSS</p>
         </div>
       </Card>
     </div>