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/page.tsx

@@ -15,7 +15,7 @@ import { siteDocumentTitle } from "@/lib/brand";
 import { isAdminOrAbove } from "@/lib/roles";
 import Pagination from "@/components/Pagination";
 import PostRow from "@/components/PostRow";
-import FeedTabs, { type FeedSort } from "@/components/home/FeedTabs";
+import FeedTabs from "@/components/home/FeedTabs";
 import FeedNewTip from "@/components/home/FeedNewTip";
 import { WorkspaceNav, WorkspaceNavMobile } from "@/components/home/WorkspaceNav";
 import { SiteDocBreadcrumb } from "@/components/site-doc";
@@ -25,25 +25,24 @@ import {
   BoardPanelsMobile,
   BoardMissingPanel,
 } from "@/components/home/BoardPanels";
-
-export async function generateMetadata(): Promise<Metadata> {
-  const settings = await getPublicSettingsCached();
-  return {
-    title: { absolute: siteDocumentTitle(settings.site_name, settings.site_slogan) },
-    description: settings.site_description,
-  };
-}
+import { requestCanonical } from "@/lib/canonicalMeta";
+import { defaultFeedSort, homeCanonicalQuery, normalizeFeedSort } from "@/lib/siteUrl";
+import { listingJsonLd } from "@/lib/jsonLd";
+import JsonLd from "@/components/JsonLd";
 
 interface HomePageProps {
   searchParams: Promise<{ q?: string; page?: string; sort?: string; board?: string }>;
 }
 
-function normalizeSort(v: string | undefined, allowComments: boolean): FeedSort {
-  if (v === "recommended") return "recommended";
-  if (v === "new") return "new";
-  if (!allowComments) return "new";
-  if (v === "latest") return "latest";
-  return "latest";
+export async function generateMetadata({ searchParams }: HomePageProps): Promise<Metadata> {
+  const settings = await getPublicSettingsCached();
+  const sp = await searchParams;
+  const allowComments = settings.allow_comments !== false;
+  return {
+    title: { absolute: siteDocumentTitle(settings.site_name, settings.site_slogan) },
+    description: settings.site_description,
+    ...(await requestCanonical("/", homeCanonicalQuery(sp, allowComments))),
+  };
 }
 
 // 空结果面板（无帖 / 无搜索结果）
@@ -90,7 +89,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
   const cookie = authCookieHeader(await cookies());
   const publicSettings = await getPublicSettingsCached();
   const allowComments = publicSettings.allow_comments !== false;
-  const sort = normalizeSort(sp.sort, allowComments);
+  const sort = normalizeFeedSort(sp.sort, allowComments);
   // 与 layout 共享同一份 /me 请求（React cache 去重）
   const mePromise = getMeCached(cookie || undefined);
   const postsPromise = fetchPosts(
@@ -125,10 +124,31 @@ export default async function HomePage({ searchParams }: HomePageProps) {
   // boardId 有效但接口失败 → 显示简卡；成功则板级右栏；否则全站右栏
   const boardPanelsMissing = showBoardPanels && !boardSidebar;
 
+  const pageName = isSearch
+    ? `搜索“${keyword}”`
+    : activeBoard
+      ? activeBoard.name
+      : sort === "new"
+        ? "最新发布"
+        : sort === "recommended"
+          ? "推荐帖"
+          : "最新讨论";
+  const listingLd = listingJsonLd({
+    siteName: publicSettings.site_name || "姜十三论坛",
+    siteDescription: publicSettings.site_description,
+    pageName,
+    path: "/",
+    query: homeCanonicalQuery(sp, allowComments),
+    items: postsData.posts.map((p) => ({ id: p.id, name: p.title })),
+    page,
+    pageSize: 20,
+  });
+
   // 搜索态：单栏占满，无 Tabs/侧栏
   if (isSearch) {
     return (
       <div className="max-w-3xl mx-auto">
+        <JsonLd data={listingLd} />
         <div className="mb-5">
           <h1 className="text-[24px] sm:text-[28px] font-extrabold tracking-tight" style={{ color: "var(--ink)" }}>
             搜索“<span style={{ color: "var(--accent)" }}>{keyword}</span>”
@@ -149,27 +169,23 @@ export default async function HomePage({ searchParams }: HomePageProps) {
           page={page}
           size={20}
           basePath="/"
-          query={{ q: keyword }}
+          query={{
+            q: keyword,
+            ...(sort !== defaultFeedSort(allowComments) ? { sort } : {}),
+          }}
         />
       </div>
     );
   }
 
   // 置顶帖直接按后端 pinned DESC 顺序并入统一信息流；标题仅供屏幕阅读器
-  const heading = activeBoard
-    ? activeBoard.name
-    : sort === "new"
-      ? "最新发布"
-      : sort === "recommended"
-        ? "推荐帖"
-        : "最新讨论";
-
   const pageQuery: Record<string, string> = {};
   if (boardId > 0) pageQuery.board = String(boardId);
-  if (sort !== "latest") pageQuery.sort = sort;
+  if (sort !== defaultFeedSort(allowComments)) pageQuery.sort = sort;
 
   return (
     <div>
+      <JsonLd data={listingLd} />
       <WorkspaceNavMobile boards={boards} user={user} />
 
       <div className={`flex items-start gap-6 xl:gap-7 ${activeBoard ? "" : "mt-5 lg:mt-0"}`}>
@@ -177,7 +193,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
 
         {/* 中栏：tab 栏与帖子流为同一个整体卡片（左栏切板块只替换这一列） */}
         <div className="flex-1 min-w-0">
-          <h1 className="sr-only">{heading}</h1>
+          <h1 className="sr-only">{pageName}</h1>
 
           <div className="panel overflow-hidden">
             {activeBoard ? (