feat: 全站评论开关，并统一后台表单控件

关闭评论后前台隐藏评论能力；外观/设置/公告改用 AdminField 与 Stepper。

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

frontend/components/PostRow.tsx

@@ -2,6 +2,7 @@ import Link from "next/link";
 import { ArrowLeft } from "lucide-react";
 import type { PostListItem } from "@/lib/api";
 import { formatRelative } from "@/lib/format";
+import { getPublicSettingsCached } from "@/lib/serverData";
 import { normalizePostType, postTypeLabel, contentAccessLabel, typeStatusLabel, typeStatusClass } from "@/lib/postMeta";
 import LikeButton from "./LikeButton";
 import Avatar from "./Avatar";
@@ -15,7 +16,7 @@ import { IconComment, IconEye } from "./Icons";
  * 点击：标题 stretch-link 铺满整行进帖；仅头像/作者/回复者/点赞等加 above-link 抬层。
  * 板块胶囊仅展示，不可点，避免误进板块筛选。
  */
-export default function PostRow({
+export default async function PostRow({
   post,
   showBoard = false,
   index = 0,
@@ -31,8 +32,12 @@ export default function PostRow({
   showViews?: boolean;
   showLike?: boolean;
 }) {
+  const allowComments = (await getPublicSettingsCached()).allow_comments !== false;
   const lastReply = post.last_reply;
-  const replied = lastReply && new Date(lastReply.created_at).getTime() > new Date(post.created_at).getTime() + 60_000;
+  const replied =
+    allowComments &&
+    lastReply &&
+    new Date(lastReply.created_at).getTime() > new Date(post.created_at).getTime() + 60_000;
   const pt = normalizePostType(post.post_type);
   const statusBadge = pt !== "discussion" ? typeStatusLabel(pt, post.type_status) : "";
   const statusClass = statusBadge ? typeStatusClass(pt, post.type_status) : "";
@@ -115,7 +120,7 @@ export default function PostRow({
               <span className="tabular-nums shrink-0">{formatRelative(lastReply!.created_at)}</span>
             </span>
           )}
-          {!replied && post.comment_count === 0 && (
+          {!replied && allowComments && post.comment_count === 0 && (
             <span className="hidden sm:inline" aria-hidden>
               · 暂无回复
             </span>
@@ -124,15 +129,17 @@ export default function PostRow({
       </div>
 
       <div className="flex items-center gap-3 sm:gap-4 shrink-0">
-        <Link
-          href={`/post/${post.id}`}
-          tabIndex={-1}
-          aria-label={`${post.comment_count} 条评论`}
-          className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} above-link items-center gap-1.5 meta tabular-nums text-[13.5px] hover:text-[var(--accent)] transition-colors`}
-        >
-          <IconComment size={17} />
-          {post.comment_count}
-        </Link>
+        {allowComments ? (
+          <Link
+            href={`/post/${post.id}`}
+            tabIndex={-1}
+            aria-label={`${post.comment_count} 条评论`}
+            className={`${showViews ? "hidden sm:inline-flex" : "inline-flex"} above-link items-center gap-1.5 meta tabular-nums text-[13.5px] hover:text-[var(--accent)] transition-colors`}
+          >
+            <IconComment size={17} />
+            {post.comment_count}
+          </Link>
+        ) : null}
         {showViews && (
           <span
             className="hidden md:inline-flex items-center gap-1.5 meta tabular-nums"