feat: 类型帖互动、积分经济与发帖体验

补齐问答采纳/重开、投票匿名与有票禁编、悬赏过期退回、抽奖回帖开奖，并接入积分账本与发帖附件可见性。

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

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

@@ -2,7 +2,6 @@ import type { Metadata } from "next";
 import Link from "next/link";
 import { notFound } from "next/navigation";
 import { cookies } from "next/headers";
-import ReactMarkdown from "react-markdown";
 import {
   Clock,
   Heart,
@@ -33,8 +32,13 @@ import PostToc, { type TocItem } from "@/components/PostToc";
 import MobilePostBar from "@/components/MobilePostBar";
 import Avatar from "@/components/Avatar";
 import RoleBadge from "@/components/RoleBadge";
+import MarkdownBody from "@/components/MarkdownBody";
+import ContentLockGate from "@/components/ContentLockGate";
+import PostAttachments from "@/components/PostAttachments";
+import PostInteractPanels from "@/components/PostInteractPanels";
 import { canModerateBoard } from "@/lib/roles";
 import { IconComment, IconEye } from "@/components/Icons";
+import { normalizePostType, postTypeLabel, contentAccessLabel, typeStatusLabel } from "@/lib/postMeta";
 
 interface PageProps {
   params: Promise<{ id: string }>;
@@ -47,12 +51,15 @@ export async function generateMetadata({ params }: PageProps): Promise<Metadata>
   try {
     // 带登录态：作者/管理团队看待审帖时标签标题也应是真实标题而非"帖子不存在"
     const { post } = await fetchPostDetail(id, authCookieHeader(await cookies()));
+    const desc = post.content_locked
+      ? post.access_hint || "部分内容需满足条件后可见"
+      : post.content.slice(0, 160);
     return {
       title: post.title,
-      description: post.content.slice(0, 160),
+      description: desc,
       openGraph: {
         title: post.title,
-        description: post.content.slice(0, 160),
+        description: desc,
         type: "article",
       },
     };
@@ -194,7 +201,7 @@ function AuthorPosts({ posts }: { posts: PostListItem[] }) {
           <li key={p.id}>
             <Link
               href={`/post/${p.id}`}
-              title={p.title}
+              data-tip={p.title}
               className="block rounded-[10px] px-2 py-2 transition-colors hover:bg-[var(--accent-soft)] focus-visible:bg-[var(--accent-soft)]"
             >
               <span
@@ -236,7 +243,7 @@ function RelatedPosts({
       <ol>
         {posts.map((p, i) => (
           <li key={p.id}>
-            <Link href={`/post/${p.id}`} className="j13-rank" title={p.title}>
+            <Link href={`/post/${p.id}`} className="j13-rank" data-tip={p.title}>
               <span className="j13-rank-no">{i + 1}</span>
               <span className="min-w-0 flex-1">
                 <span
@@ -333,20 +340,35 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
   const related = (relatedData?.posts ?? []).filter((p) => p.id !== post.id).slice(0, 5);
   const authorPosts = (profile?.posts ?? []).filter((p) => p.id !== post.id).slice(0, 5);
 
-  const toc = extractToc(post.content);
-  const readingMinutes = Math.max(1, Math.ceil(post.content.length / 400));
+  const toc = post.content_locked ? [] : extractToc(post.content);
+  const readingMinutes = Math.max(
+    1,
+    Math.ceil((post.content_locked ? post.title.length : post.content.length) / 400)
+  );
   const edited =
     new Date(post.updated_at).getTime() - new Date(post.created_at).getTime() > 60_000;
 
   // 非公开帖（待审/未通过）仅作者本人与管理团队可看，顶部给出醒目状态
   const isPublished = post.status === "published";
-  const canSeeStatus = !!me.user && (me.user.id === post.user.id || canModerateBoard(me.user, post.board_id));
+  const postType = normalizePostType(post.post_type);
+  const typeStatus = typeStatusLabel(postType, post.type_status);
+  const canManageTyped =
+    !!me.user && (me.user.id === post.user.id || canModerateBoard(me.user, post.board_id));
+  const canSeeStatus = canManageTyped;
+  const questionSolved = !!post.question?.solved;
+  const acceptMode =
+    postType === "question" && !questionSolved && canManageTyped
+      ? ("question" as const)
+      : post.bounty?.can_accept
+        ? ("bounty" as const)
+        : null;
 
   const jsonLd = {
     "@context": "https://schema.org",
     "@type": "DiscussionForumPosting",
     headline: post.title,
-    articleBody: post.content,
+    // 锁定正文不进 JSON-LD，避免 SEO 泄露付费/回复可见内容
+    articleBody: post.content_locked ? undefined : post.content,
     datePublished: post.created_at,
     dateModified: post.updated_at,
     author: { "@type": "Person", name: post.user.nickname },
@@ -409,11 +431,35 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
             <div className="panel p-6 sm:p-8">
               <header className="mb-7">
                 <div className="flex items-center gap-2 mb-4 flex-wrap">
-                  {post.pinned > 0 && <span className="badge-pin">置顶</span>}
-                  {post.recommended && <span className="badge-rec">推荐</span>}
+                  <Link href={`/board/${post.board.id}`} className="chip">
+                    {post.board.name}
+                  </Link>
+                </div>
+                <div className="flex items-start gap-2 flex-wrap mb-6">
+                  {/* 仅置顶/推荐在标题左侧 */}
+                  {post.pinned > 0 && <span className="badge-pin shrink-0 mt-2 sm:mt-3">置顶</span>}
+                  {post.recommended && <span className="badge-rec shrink-0 mt-2 sm:mt-3">推荐</span>}
+                  <h1
+                    className="text-[26px] sm:text-[34px] font-extrabold leading-tight tracking-tight min-w-0"
+                    style={{ color: "var(--ink)" }}
+                  >
+                    {post.title}
+                  </h1>
+                  {/* 其余徽章紧跟标题右侧；问答不显示类型徽章 */}
+                  {postType !== "discussion" && postType !== "question" && (
+                    <span className="badge-type shrink-0 mt-2 sm:mt-3">{postTypeLabel(postType)}</span>
+                  )}
+                  {typeStatus && (
+                    <span className="badge-access shrink-0 mt-2 sm:mt-3">{typeStatus}</span>
+                  )}
+                  {post.content_access && post.content_access !== "public" && (
+                    <span className="badge-access shrink-0 mt-2 sm:mt-3">
+                      {contentAccessLabel(post.content_access)}
+                    </span>
+                  )}
                   {!isPublished && canSeeStatus && post.status === "pending" && (
                     <span
-                      className="inline-flex items-center gap-1 rounded-full px-2.5 py-0.5 text-[11.5px] font-bold"
+                      className="inline-flex items-center gap-1 rounded-full px-2.5 py-0.5 text-[11.5px] font-bold shrink-0 mt-2 sm:mt-3"
                       style={{ background: "var(--gold-soft)", color: "var(--gold)" }}
                     >
                       等待审核
@@ -421,19 +467,13 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                   )}
                   {!isPublished && canSeeStatus && post.status === "rejected" && (
                     <span
-                      className="inline-flex items-center gap-1 rounded-full px-2.5 py-0.5 text-[11.5px] font-bold"
+                      className="inline-flex items-center gap-1 rounded-full px-2.5 py-0.5 text-[11.5px] font-bold shrink-0 mt-2 sm:mt-3"
                       style={{ background: "var(--danger-soft)", color: "var(--danger)" }}
                     >
                       未通过审核
                     </span>
                   )}
-                  <Link href={`/board/${post.board.id}`} className="chip">
-                    {post.board.name}
-                  </Link>
                 </div>
-                <h1 className="text-[26px] sm:text-[34px] font-extrabold leading-tight tracking-tight mb-6" style={{ color: "var(--ink)" }}>
-                  {post.title}
-                </h1>
 
                 {/* 作者行：头像 + 昵称居左，点赞/更多操作居右 */}
                 <div
@@ -487,11 +527,43 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
                 </div>
               )}
 
-              <div className="prose-content">
-                <ReactMarkdown components={{ h2: headingRenderer("h2"), h3: headingRenderer("h3") }}>
-                  {post.content}
-                </ReactMarkdown>
-              </div>
+              <PostInteractPanels
+                postId={post.id}
+                question={
+                  postType === "question"
+                    ? post.question ?? {
+                        solved: false,
+                        accepted_comment_id: 0,
+                        can_accept: canManageTyped,
+                        can_solve: canManageTyped,
+                        can_reopen: false,
+                      }
+                    : post.question
+                }
+                poll={post.poll}
+                bounty={post.bounty}
+                lottery={post.lottery}
+                loggedIn={!!me.user}
+              />
+
+              {post.content_locked ? (
+                <ContentLockGate
+                  postId={post.id}
+                  hint={post.access_hint}
+                  access={post.content_access}
+                  points={post.access_points}
+                  loggedIn={!!me.user}
+                />
+              ) : (
+                <MarkdownBody
+                  content={post.content}
+                  components={{ h2: headingRenderer("h2"), h3: headingRenderer("h3") }}
+                />
+              )}
+
+              {!post.content_locked && (
+                <PostAttachments postId={post.id} items={post.attachments || []} />
+              )}
 
               {/* 文末点赞：分隔线后居中，唯一的点赞入口（作者行不再放置） */}
               <div
@@ -519,12 +591,19 @@ export default async function PostDetailPage({ params, searchParams }: PageProps
               <CommentSection
                 postId={id}
                 boardId={post.board_id}
+                authorId={post.user.id}
                 comments={comments}
                 total={commentsData.total}
                 totalComments={commentsData.total_comments}
                 page={commentsData.page}
                 size={commentsData.size}
                 user={me.user}
+                acceptMode={acceptMode}
+                acceptedCommentId={
+                  post.question?.accepted_comment_id ||
+                  post.bounty?.accepted_comment_id ||
+                  0
+                }
               />
             ) : (
               <section className="panel p-6 sm:p-8 mt-6 text-center" aria-label="评论区">