feat(*): 模型能力配置 - 支持模型级视频限制校验与协议管理

web/src/pages/admin/index.tsx

@@ -9,8 +9,8 @@ export default function AdminPage() {
     if (!hydrated) return null;
     if (actor?.role !== "admin") {
         return (
-            <main className="min-h-dvh bg-background px-6 py-10 text-foreground">
-                <div className="mx-auto max-w-3xl rounded-lg border border-border bg-background p-6">
+            <main className="app-workspace-page min-h-dvh px-6 py-10 text-foreground">
+                <div className="mx-auto max-w-3xl rounded-lg border border-border bg-[var(--workspace-surface)] p-6">
                     <h1 className="text-2xl font-semibold">无权限</h1>
                     <p className="mt-2 text-sm text-foreground/55">当前账号不是管理员，无法访问后台。</p>
                 </div>