首次提交：姜十三论坛

后端 Go+Gin：认证/CSRF/限流、板块、帖子、评论、点赞、通知、用户资料、置顶推荐；前端 Next.js 16：发帖/编辑/删除、搜索、分页、点赞、通知中心、设置；基础设施 docker-compose 与配置模板；添加 .gitignore 与专有许可证（保留所有权利）

frontend/app/u/[id]/page.tsx

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+import Link from "next/link";
+import { Metadata } from "next";
+import { fetchUserProfile, type UserProfile } from "@/lib/api";
+import Pagination from "@/components/Pagination";
+import UserProfileClient from "./UserProfileClient";
+
+interface UserPageProps {
+  params: Promise<{ id: string }>;
+  searchParams: Promise<{ page?: string; tab?: string }>;
+}
+
+export async function generateMetadata({ params }: UserPageProps): Promise<Metadata> {
+  const { id } = await params;
+  return {
+    title: `用户资料 - 姜十三论坛`,
+    description: `查看用户 ${id} 的资料、发帖与评论`,
+  };
+}
+
+export default async function UserPage({ params, searchParams }: UserPageProps) {
+  const { id } = await params;
+  const { page: pageStr } = await searchParams;
+  const page = Math.max(1, parseInt(pageStr || "1", 10) || 1);
+
+  let data: UserProfile;
+  try {
+    data = await fetchUserProfile(id, page);
+  } catch {
+    return (
+      <div className="text-center py-16" style={{ color: "var(--text-secondary)" }}>
+        <p className="text-lg">用户不存在</p>
+        <Link href="/" className="mt-4 inline-block hover:underline" style={{ color: "var(--primary)" }}>
+          返回首页
+        </Link>
+      </div>
+    );
+  }
+
+  const u = data.user;
+  const roleLabel = u.role === "admin" ? "管理员" : "用户";
+
+  return (
+    <div className="max-w-4xl mx-auto">
+      {/* 用户信息卡片 */}
+      <div
+        className="rounded-xl border p-6 mb-6 flex items-start gap-5"
+        style={{ borderColor: "var(--border)", background: "var(--bg)" }}
+      >
+        <div
+          className="w-20 h-20 rounded-full flex items-center justify-center text-2xl font-bold shrink-0"
+          style={{ background: "var(--bg-secondary)", color: "var(--primary)" }}
+        >
+          {u.avatar ? (
+            <img src={u.avatar} alt={u.nickname} className="w-full h-full rounded-full object-cover" />
+          ) : (
+            (u.nickname || u.username).charAt(0).toUpperCase()
+          )}
+        </div>
+        <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2 flex-wrap">
+            <h1 className="text-2xl font-bold" style={{ color: "var(--text)" }}>
+              {u.nickname || u.username}
+            </h1>
+            {u.role === "admin" && (
+              <span
+                className="text-xs px-2 py-0.5 rounded font-medium"
+                style={{ background: "var(--primary)", color: "white" }}
+              >
+                {roleLabel}
+              </span>
+            )}
+          </div>
+          <p className="text-sm mt-1" style={{ color: "var(--text-secondary)" }}>
+            @{u.username} · 加入于 {new Date(u.created_at).toLocaleDateString("zh-CN")}
+          </p>
+          <div className="flex gap-6 mt-3 text-sm">
+            <span style={{ color: "var(--text)" }}>
+              <strong>{data.stats.post_count}</strong>{" "}
+              <span style={{ color: "var(--text-secondary)" }}>帖子</span>
+            </span>
+            <span style={{ color: "var(--text)" }}>
+              <strong>{data.stats.comment_count}</strong>{" "}
+              <span style={{ color: "var(--text-secondary)" }}>评论</span>
+            </span>
+          </div>
+        </div>
+      </div>
+
+      {/* 发帖 / 评论 切换 */}
+      <UserProfileClient userId={id} initialPosts={data} initialPage={page} />
+    </div>
+  );
+}