refactor(replies): remove pinned-thread special handling for reply preview

src/components/post-desktop/post-desktop.tsx

@@ -831,9 +831,8 @@ const PostDesktop = ({
   const repliesCount = computeOmittedCount({
     totalReplyCount,
     visibleCount: BOARD_REPLIES_PREVIEW_VISIBLE_COUNT,
-    pinned,
   });
-  const linksCount = pinned ? totalLinksCount : totalLinksCount - visiblelinksCount;
+  const linksCount = totalLinksCount - visiblelinksCount;
 
   const stateString = useStateString(post) || t('downloading_board');
   const hasFailedState = state === 'failed';
@@ -1056,7 +1055,6 @@ const PostDesktop = ({
         {/* Non-virtualized rendering for board view (preview replies when collapsed, full when expanded) */}
         {!isHidden &&
           !showAllReplies &&
-          !(pinned && !isInPostPageView && !showOmittedReplies[cid]) &&
           !isInPendingPostView &&
           repliesForRender &&
           showReplies &&

src/components/post-mobile/post-mobile.tsx

@@ -732,7 +732,7 @@ const PostMobile = ({
               )}
             </div>
             {/* Virtuoso infinite scroll for post page view when there's more content to paginate */}
-            {!(pinned && !isInPostView) && showAllReplies && !isInPendingPostView && showReplies && hasMore && (
+            {showAllReplies && !isInPendingPostView && showReplies && hasMore && (
               <Virtuoso
                 increaseViewportBy={{ bottom: 1200, top: 1200 }}
                 totalCount={filteredReplies.length}
@@ -758,8 +758,7 @@ const PostMobile = ({
               />
             )}
             {/* Non-virtualized rendering for post page view when all replies fit on one page */}
-            {!(pinned && !isInPostView) &&
-              showAllReplies &&
+            {showAllReplies &&
               !isInPendingPostView &&
               showReplies &&
               !hasMore &&
@@ -776,8 +775,7 @@ const PostMobile = ({
                 </div>
               ))}
             {/* Non-virtualized rendering for board view (last 5 replies) */}
-            {!(pinned && !isInPostView) &&
-              !showAllReplies &&
+            {!showAllReplies &&
               !isInPendingPostView &&
               repliesForRender &&
               showReplies &&

src/lib/utils/replies-preview-utils.ts

@@ -34,18 +34,14 @@ export function getPreviewDisplayReplies<T extends CommentLike>(replies: T[], vi
 export interface ComputeOmittedParams {
   totalReplyCount: number;
   visibleCount: number;
-  pinned?: boolean;
 }
 
 /**
- * Computes omitted reply count for board view. For pinned threads, collapsed view
- * shows 0 replies, so omitted = total. For non-pinned, omitted = total - visible.
+ * Computes omitted reply count for board view. All threads (pinned or not) show
+ * the last `visibleCount` replies when collapsed; omitted = total - visible.
  * Result is always clamped at zero.
  */
-export function computeOmittedCount({ totalReplyCount, visibleCount, pinned = false }: ComputeOmittedParams): number {
-  if (pinned) {
-    return Math.max(0, totalReplyCount);
-  }
+export function computeOmittedCount({ totalReplyCount, visibleCount }: ComputeOmittedParams): number {
   return Math.max(0, totalReplyCount - visibleCount);
 }