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).

inc/modules/user-parts/urls.php

@@ -32,6 +32,34 @@ function aksrt_get_user_center_url(string $tab = ''): string {
 }
 endif;
 
+if (!function_exists('aksrt_get_new_post_url')) :
+/**
+ * 前台写文章/投稿页 URL（模板 templates/pages/page-submit.php）。
+ *
+ * @param int $edit_id 编辑中的文章 ID；0 表示新建。
+ * @return string 未指派页面时返回空串。
+ */
+function aksrt_get_new_post_url(int $edit_id = 0): string {
+	if (class_exists('\AKSRT\Settings\Settings')) {
+		$submit = \AKSRT\Settings\Settings::get_submit_settings();
+		if (isset($submit['enabled']) && empty($submit['enabled'])) {
+			return '';
+		}
+	}
+
+	$url = function_exists('aksrt_get_page_url_by_template')
+		? aksrt_get_page_url_by_template('templates/pages/page-submit.php')
+		: '';
+	if ($url === '') {
+		return '';
+	}
+	if ($edit_id > 0) {
+		$url = add_query_arg('edit', $edit_id, $url);
+	}
+	return $url;
+}
+endif;
+
 if (!function_exists('aksrt_get_orders_page_url')) :
 /**
  * 订单中心页面 URL（模板 templates/pages/page-orders.php）。