公开页补齐自引用 Canonical 与按类型的结构化数据，图片补上说明文字。

后台设置和内容编辑改成可导航布局；部署用访客 origin 生成 Canonical，避免落到容器地址。

Co-authored-by: Cursor <cursoragent@cursor.com>

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

@@ -20,6 +20,10 @@ import RoleBadge from "@/components/RoleBadge";
 import { roleMeta } from "@/lib/roles";
 import StartDMButton from "./StartDMButton";
 import StaffUserMenu from "@/components/StaffUserMenu";
+import { requestCanonical } from "@/lib/canonicalMeta";
+import { absoluteCanonical, canonicalPage } from "@/lib/siteUrl";
+import { profileJsonLd } from "@/lib/jsonLd";
+import JsonLd from "@/components/JsonLd";
 
 interface UserPageProps {
   params: Promise<{ id: string }>;
@@ -28,16 +32,33 @@ interface UserPageProps {
 
 export type UserTab = "posts" | "comments" | "settings" | "security";
 
-export async function generateMetadata({ params }: UserPageProps): Promise<Metadata> {
+export async function generateMetadata({ params, searchParams }: UserPageProps): Promise<Metadata> {
   const { id } = await params;
+  const sp = await searchParams;
+  const rawTab = sp.tab;
+  const tab: UserTab =
+    rawTab === "comments" ? "comments" :
+    rawTab === "settings" ? "settings" :
+    rawTab === "security" ? "security" : "posts";
   try {
     const data = await fetchUserProfile(id, 1);
     const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
+    const title = data.user.nickname || data.user.username;
+    const description = allowComments
+      ? `查看 ${data.user.nickname} 的资料、发帖与评论`
+      : `查看 ${data.user.nickname} 的资料与发帖`;
+    // 资料/安全 tab 仅本人可见，不声明 Canonical，避免被当成公开资料页或继承首页
+    if (tab === "settings" || tab === "security") {
+      return { title, description };
+    }
+    const query: Record<string, string | number> = {};
+    if (allowComments && tab === "comments") query.tab = "comments";
+    const page = canonicalPage(sp.page);
+    if (page) query.page = page;
     return {
-      title: data.user.nickname || data.user.username,
-      description: allowComments
-        ? `查看 ${data.user.nickname} 的资料、发帖与评论`
-        : `查看 ${data.user.nickname} 的资料与发帖`,
+      title,
+      description,
+      ...(await requestCanonical(`/u/${data.user.id}`, query)),
     };
   } catch {
     return { title: "用户不存在" };
@@ -135,11 +156,26 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   const visibleNav = navItems.filter((t) => !t.ownerOnly || isOwner);
   const tabHref = (t: UserTab) => (t === "posts" ? `/u/${id}` : `/u/${id}?tab=${t}`);
 
+  const profileQuery: Record<string, string | number> = {};
+  if (allowComments && effectiveTab === "comments") profileQuery.tab = "comments";
+  if (page > 1) profileQuery.page = page;
+  const profileLd =
+    effectiveTab === "settings" || effectiveTab === "security"
+      ? null
+      : profileJsonLd({
+          id: u.id,
+          name: u.nickname || u.username,
+          username: u.username,
+          signature: (u.signature || "").trim() || undefined,
+          pageUrl: absoluteCanonical(`/u/${u.id}`, profileQuery),
+        });
+
   /** 本页卡片统一阴影；暗色随 color-mix 自动加深 */
   const cardShadow = "0 1px 3px color-mix(in srgb, #000 18%, transparent)";
 
   return (
     <div>
+      <JsonLd data={profileLd} />
       <nav className="meta -mt-4 sm:-mt-6 mb-1.5 flex items-center gap-1 text-[12.5px] leading-none">
         <Link href="/" className="hover:text-[var(--accent)] transition-colors">首页</Link>
         <ChevronRight size={13} />