feat(admin): add prototype admin panel

- 新增管理员布局、仪表盘、侧边栏等组件
- 实现用户数量、问题数量等统计显示
- 添加 LSP 连接状态组件- 创建统计卡片组件用于展示各类数据
- 开发网格组件以支持灵活的布局

src/app/(app)/admin/layout.tsx

@@ -0,0 +1,21 @@
+import { ReactNode } from "react";
+import { AdminSidebar } from "@/components/admin/sidebar";
+import { Header } from "@/components/header";
+
+interface AdminLayoutProps {
+  children: ReactNode;
+}
+
+export default function AdminLayout({ children }: AdminLayoutProps) {
+  return (
+    <div className="flex min-h-screen">
+      <AdminSidebar />
+      <div className="flex-1 flex flex-col">
+        {/*<Header />*/}
+        <main className="flex-1 p-6">
+          {children}
+        </main>
+      </div>
+    </div>
+  );
+}

src/app/(app)/admin/page.tsx

@@ -0,0 +1,27 @@
+import { AdminSidebar } from "@/components/admin/sidebar";
+import { Header } from "@/components/header";
+import { AdminDashboard } from "@/components/admin/dashboard";
+import AdminLayout from "@/app/(app)/admin/layout";
+import type { ReactElement } from "react";
+import prisma from "@/lib/prisma";
+
+export default async function AdminPage(): Promise<ReactElement> {
+  const [userCount, problemCount] = await Promise.all([
+    prisma.user.count(),
+    prisma.problem.count(),
+  ]);
+
+  return (
+    <AdminLayout>
+      <div className="flex min-h-screen">
+        <AdminSidebar />
+        <div className="flex-1 flex flex-col">
+          <Header />
+          <main className="flex-1 p-6">
+            <AdminDashboard userCount={userCount} problemCount={problemCount} />
+          </main>
+        </div>
+      </div>
+    </AdminLayout>
+  );
+}

src/app/layout.tsx

@@ -5,6 +5,8 @@ import { getLocale } from "next-intl/server";
 import { NextIntlClientProvider } from "next-intl";
 import { ThemeProvider } from "@/components/theme-provider";
 import { SettingsDialog } from "@/components/settings-dialog";
+import { SessionProvider } from "next-auth/react";
+import { SidebarProvider } from "@/components/ui/sidebar";
 
 export const metadata: Metadata = {
   title: "Judge4c",
@@ -29,9 +31,13 @@ export default async function RootLayout({ children }: RootLayoutProps) {
             enableSystem
             disableTransitionOnChange
           >
-            <div className="w-full">{children}</div>
+            <SessionProvider>
-            <SettingsDialog />
+              <SidebarProvider>
-            <Toaster position="top-right" />
+                <div className="w-full">{children}</div>
+                <SettingsDialog />
+                <Toaster position="top-right" />
+              </SidebarProvider>
+            </SessionProvider>
           </ThemeProvider>
         </NextIntlClientProvider>
       </body>

src/components/admin/dashboard.tsx

@@ -0,0 +1,56 @@
+import { Grid } from "@/components/ui/grid";
+import StatCard from "./stat-card";
+import { LspStatus } from "./lsp-status";
+import { ProblemsetTable } from "@/features/problemset/components/table";
+import { SubmissionTable } from "@/features/problems/submission/components/table";
+import prisma from "@/lib/prisma";
+import type { ReactNode } from "react";
+
+interface AdminDashboardProps {
+  userCount?: number;
+  problemCount?: number;
+}
+
+export const AdminDashboard = async ({
+  userCount = 0,
+  problemCount = 0
+}: AdminDashboardProps) => {
+  // 获取统计数据显示
+  const [usersCount, problemsCount, submissionsCount] = await Promise.all([
+    prisma.user.count(),
+    prisma.problem.count(),
+    prisma.submission.count(),
+  ]);
+
+  return (
+    <div className="space-y-6">
+      <div>
+        <h2 className="text-2xl font-bold tracking-tight">仪表盘</h2>
+        <p className="text-muted-foreground">
+          系统运行状态概览
+        </p>
+      </div>
+
+      <Grid cols={3} gap={6}>
+        <StatCard title="用户数量" value={userCount || usersCount} />
+        <StatCard title="问题数量" value={problemCount || problemsCount} />
+        <StatCard title="测评次数" value={submissionsCount} />
+      </Grid>
+
+      <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+        <LspStatus />
+        
+        <div className="space-y-4">
+          <h3 className="text-lg font-semibold">最近提交记录</h3>
+          {/* 临时使用空字符串作为占位符，实际应从数据库获取最新问题ID */}
+          <SubmissionTable problemId="" />
+        </div>
+      </div>
+
+      <div>
+        <h3 className="text-lg font-semibold mb-4">问题列表</h3>
+        <ProblemsetTable />
+      </div>
+    </div>
+  );
+};

src/components/admin/lsp-status.tsx

@@ -0,0 +1,10 @@
+import { LspConnectionIndicator } from "@/features/problems/code/components/toolbar/controls/lsp-connection-indicator";
+
+export const LspStatus = () => {
+  return (
+    <div className="p-4">
+      <h3 className="text-lg font-semibold mb-2">LSP 连接状态</h3>
+      <LspConnectionIndicator />
+    </div>
+  );
+};

src/components/admin/sidebar.tsx

@@ -0,0 +1,119 @@
+"use client"
+import { useSession } from "next-auth/react";
+import {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarHeader,
+  SidebarRail,
+} from "@/components/ui/sidebar";
+import { NavMain } from "@/components/nav-main";
+import { NavProjects } from "@/components/nav-projects";
+import { TeamSwitcher } from "@/components/team-switcher";
+import { NavUser } from "@/components/nav-user";
+import {
+  AudioWaveform,
+  Bot,
+  Command,
+  Frame,
+  GalleryVerticalEnd,
+  Map,
+  PieChart,
+  Settings2,
+  SquareTerminal,
+} from "lucide-react";
+import { SessionProvider } from "next-auth/react";
+import { SidebarProvider } from "@/components/ui/sidebar";
+
+
+// 如果 adminData.teams 没有在别处定义，请取消注释下面的代码并提供实际值
+/*
+const teams = [
+  // 在这里放置你的团队数据
+];
+*/
+
+// 创建图标映射
+type LucideIconMap = {
+  [key: string]: typeof AudioWaveform;
+};
+
+const lucideIconMap: LucideIconMap = {
+  AudioWaveform,
+  Bot,
+  Command,
+  Frame,
+  GalleryVerticalEnd,
+  Map,
+  PieChart,
+  Settings2,
+  SquareTerminal,
+};
+
+const adminData = {
+  // teams: [
+  //   {
+  //     name: "Admin Team",
+  //     logo: GalleryVerticalEnd,
+  //     plan: "Enterprise",
+  //   },
+  // ],
+  navMain: [
+    {
+      title: "Dashboard",
+      url: "/admin",
+      icon: Settings2,
+      items: [
+        {
+          title: "Overview",
+          url: "/admin",
+        },
+        {
+          title: "Users",
+          url: "/admin/users",
+        },
+        {
+          title: "Problems",
+          url: "/admin/problems",
+        },
+      ],
+    },
+  ],
+  projects: [
+    {
+      name: "System Monitoring",
+      url: "/admin/monitoring",
+      icon: PieChart,
+    },
+    {
+      name: "Admin Tools",
+      url: "/admin/tools",
+      icon: Command,
+    },
+  ]
+};
+
+export const AdminSidebar = ({ ...props }: React.ComponentProps<typeof Sidebar>) => {
+  const { data: session } = useSession();
+  const user = {
+    name: session?.user?.name || "Admin",
+    email: session?.user?.email || "admin@example.com",
+    avatar: session?.user?.avatar || ""
+  };
+  
+  return (
+    <Sidebar collapsible="icon" {...props}>
+      {/*<SidebarHeader>*/}
+      {/*  <TeamSwitcher teams={adminData.teams} />*/}
+      {/*</SidebarHeader>*/}
+      <SidebarContent>
+        <NavMain items={adminData.navMain} />
+        <NavProjects projects={adminData.projects} />
+      </SidebarContent>
+      <SidebarFooter>
+        <NavUser user={user} />
+      </SidebarFooter>
+      <SidebarRail />
+    </Sidebar>
+  );
+};

src/components/admin/stat-card.tsx

@@ -0,0 +1,21 @@
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+
+interface StatCardProps {
+  title: string;
+  value: number;
+  icon?: React.ReactNode;
+}
+
+export default function StatCard({ title, value, icon }: StatCardProps) {
+  return (
+    <Card>
+      <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+        <CardTitle className="text-sm font-medium">{title}</CardTitle>
+        {icon && <div className="text-muted-foreground">{icon}</div>}
+      </CardHeader>
+      <CardContent>
+        <div className="text-2xl font-bold">{value.toLocaleString()}</div>
+      </CardContent>
+    </Card>
+  );
+};

src/components/ui/grid.tsx

@@ -0,0 +1,47 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+import { cn } from "@/lib/utils"
+
+const gridVariants = cva(
+  "grid",
+  {
+    variants: {
+      cols: {
+        1: "grid-cols-1",
+        2: "grid-cols-2",
+        3: "grid-cols-3",
+        4: "grid-cols-4",
+      },
+      gap: {
+        0: "gap-0",
+        2: "gap-2",
+        4: "gap-4",
+        6: "gap-6",
+        8: "gap-8",
+      },
+    },
+    defaultVariants: {
+      cols: 1,
+      gap: 4,
+    },
+  }
+)
+
+type GridProps = React.HTMLAttributes<HTMLDivElement> &
+  VariantProps<typeof gridVariants> & {
+    as?: React.ElementType
+  }
+
+const Grid = React.forwardRef<HTMLDivElement, GridProps>(
+  ({ className, cols, gap, as: Comp = "div", ...props }, ref) => {
+    return (
+      <Comp
+        className={cn(gridVariants({ cols, gap }), className)}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+
+export { Grid }