完善站点运营设置：分路由管理、登录可见评论、邮件模板内联与关闭注册 SSR。

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

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

@@ -83,7 +83,9 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   const me = await getMeCached(cookie || undefined);
   const settings = await getPublicSettingsCached();
   const allowComments = settings.allow_comments !== false;
+  const commentsRequireLogin = settings.comments_require_login === true;
   const allowMessages = settings.allow_messages !== false;
+  const canReadComments = allowComments && (!commentsRequireLogin || !!me.user);
 
   let data: UserProfile;
   try {
@@ -108,12 +110,12 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   const currentUser = me.user;
   let effectiveTab: UserTab =
     (tab === "settings" || tab === "security") && !isOwner ? "posts" : tab;
-  if (!allowComments && effectiveTab === "comments") effectiveTab = "posts";
+  if (!canReadComments && effectiveTab === "comments") effectiveTab = "posts";
 
   // 评论 tab：SSR 直出对应分页
   let commentData: UserCommentsResponse | null = null;
   let commentError = false;
-  if (allowComments && effectiveTab === "comments") {
+  if (canReadComments && effectiveTab === "comments") {
     try {
       commentData = await fetchUserComments(id, page);
     } catch {
@@ -147,7 +149,7 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   // 导航项（桌面左栏 / 移动 chips 共用定义）
   const navItems: { key: UserTab; label: string; count?: number; icon: React.ReactNode; ownerOnly?: boolean }[] = [
     { key: "posts", label: "发帖", count: data.stats.post_count, icon: <FileText size={15} /> },
-    ...(allowComments
+    ...(canReadComments
       ? [{ key: "comments" as const, label: "评论", count: data.stats.comment_count, icon: <MessageCircle size={15} /> }]
       : []),
     { key: "settings", label: "资料设置", icon: <Settings size={15} />, ownerOnly: true },
@@ -157,7 +159,7 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
   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 (canReadComments && effectiveTab === "comments") profileQuery.tab = "comments";
   if (page > 1) profileQuery.page = page;
   const profileLd =
     effectiveTab === "settings" || effectiveTab === "security"
@@ -274,7 +276,7 @@ export default async function UserPage({ params, searchParams }: UserPageProps)
                 <span className="tabular-nums font-semibold" style={{ color: "var(--ink)" }}>{data.stats.post_count}</span>
                 {" "}帖子
               </span>
-              {allowComments && (
+              {canReadComments && (
                 <>
                   <span aria-hidden className="mx-1.5">·</span>
                   <span>