feat(messages): 消息中心前台 1:1 导航/门控/资源加载

对齐 Zibll 消息中心主 tab 语义，补齐 messages/conversation 资源 enqueue，按 message_s/private_s 门控私信与总开关，并收束页面壳层与作者栏入口。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

inc/classes/scripts-traits/trait-aksrt-scripts-part-1b.php

@@ -341,6 +341,39 @@ trait AKSRT_Scripts_Part_1b {
             );
         }
 
+        // 消息中心页
+        if (is_page_template('templates/pages/page-messages.php')) {
+            $messages_css = get_template_directory() . '/assets/css/frontend/messages.css';
+            if (file_exists($messages_css)) {
+                wp_enqueue_style(
+                    'aksrt-messages',
+                    $base_uri . '/assets/css/frontend/messages.css',
+                    ['aksrt-tokens'],
+                    (string) filemtime($messages_css)
+                );
+            }
+            $messages_js = get_template_directory() . '/assets/js/messages.js';
+            if (file_exists($messages_js)) {
+                wp_enqueue_script(
+                    'aksrt-messages',
+                    $base_uri . '/assets/js/messages.js',
+                    ['aksrt-script'],
+                    (string) filemtime($messages_js),
+                    true
+                );
+            }
+            $conversation_js = get_template_directory() . '/assets/js/conversation.js';
+            if (file_exists($conversation_js)) {
+                wp_enqueue_script(
+                    'aksrt-conversation',
+                    $base_uri . '/assets/js/conversation.js',
+                    ['aksrt-script'],
+                    (string) filemtime($conversation_js),
+                    true
+                );
+            }
+        }
+
         // Forum pages (home / plate / board tax / tag / topic / compose / plate-cat)
         $is_forum_surface = is_page_template('templates/pages/page-forums.php')
             || is_page_template('templates/forum/forum-compose.php')