feat(front-submit): 1:1 写文章/投稿页对齐 zibll newposts

Register AKSRT 写文章/投稿 page template, wire header publish entry to
front submit URL, rewrite page-submit as dual-column TinyMCE compose with
featured cover, multi-category/topics/filters, pay box, drafts, and
capability-gated FrontSubmit AJAX (pay/featured traits).

src/AKSRT/Core/Templates.php

@@ -42,6 +42,8 @@ class Templates {
             'templates/pages/page-archives.php' => __('AKSRT - 文章归档', 'aksrt'),
             'templates/pages/page-categories.php' => __('AKSRT - 分类汇总', 'aksrt'),
             'templates/pages/page-newposts.php' => __('AKSRT - 最新文章', 'aksrt'),
+            // 注意：page-newposts = 最新文章列表；投稿页是 page-submit（写文章/投稿）
+            'templates/pages/page-submit.php' => __('AKSRT - 写文章/投稿', 'aksrt'),
             'templates/pages/page-posts-navs.php' => __('AKSRT - 文章导航', 'aksrt'),
             'templates/pages/page-friends.php' => __('AKSRT - 友情链接', 'aksrt'),
             'templates/pages/page-orders.php' => __('AKSRT - 订单中心', 'aksrt'),