feat(forum): frontend 1:1 list/tabs/urls/enqueue

Wire Zibll-style board sort tabs, shared topic rows, page-template
URLs, forum asset enqueue on home/plate, home synthesis load-more,
and topic last_reply meta for last-reply ordering. No dual-read.

templates/forum/forum-topic.php

@@ -117,7 +117,7 @@ $comments_enabled = !empty($permissions['can_reply']);
         <?php if ($show_breadcrumbs) : ?>
         <div class="aksrt-forum-topic__breadcrumb">
             <?php if ($bc_show_home) : ?>
-            <a href="<?php echo esc_url(home_url('/forums/')); ?>"><?php echo esc_html($bc_forum_name); ?></a>
+            <a href="<?php echo esc_url(aksrt_get_forum_home_url()); ?>"><?php echo esc_html($bc_forum_name); ?></a>
             <?php endif; ?>
             <?php if ($board) : ?>
                 <?php if ($bc_show_home) : ?><span class="aksrt-forum-topic__sep">/</span><?php endif; ?>
@@ -157,7 +157,7 @@ $comments_enabled = !empty($permissions['can_reply']);
             <div class="aksrt-forum-topic__meta">
                 <span class="aksrt-forum-topic__board-link-wrap">
                     <i class="fas fa-layer-group"></i>
-                    <a class="aksrt-forum-topic__board-link" href="<?php echo esc_url((string) ($board['url'] ?? home_url('/forums/'))); ?>"><?php echo esc_html((string) ($board['name'] ?? $bc_forum_name)); ?></a>
+                    <a class="aksrt-forum-topic__board-link" href="<?php echo esc_url((string) ($board['url'] ?? aksrt_get_forum_home_url())); ?>"><?php echo esc_html((string) ($board['name'] ?? $bc_forum_name)); ?></a>
                 </span>
                 <span class="aksrt-forum-topic__author">
                     <?php if (!empty($topic['author']['avatar_url'])) : ?>