feat: 帖子全局/板块置顶支持权重排序，优化列表与详情渲染

handler/ssr_home.go

@@ -673,10 +673,10 @@ func writeSSRPostRow(
 	}
 
 	b.WriteString(`<div class="post-title-row">`)
-	if post.Pinned {
+	if post.Pinned > 0 {
 		b.WriteString(`<span class="post-pin-badge" title="全局置顶">全局置顶</span>`)
 	}
-	if post.BoardPinned {
+	if post.BoardPinned > 0 {
 		b.WriteString(`<span class="post-pin-badge post-pin-badge--board" title="板块置顶">板块置顶</span>`)
 	}
 	if post.Featured {