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/components/LikeButton.tsx

@@ -72,7 +72,8 @@ export default function LikeButton({
     <button
       onClick={handleClick}
       disabled={loading}
-      title={liked ? "取消点赞" : "点赞"}
+      data-tip={liked ? "取消点赞" : "点赞"}
+      aria-label={liked ? "取消点赞" : "点赞"}
       aria-pressed={liked}
       className={`j13-like inline-flex items-center justify-center font-semibold tabular-nums rounded-full border disabled:opacity-50 ${liked ? "is-liked" : ""} ${sizeCls}`}
     >