feat(widgets): simplify locations and paid sidebar

Remove deprecated widget locations and widgets, standardize sidebar labels, and render a compact paid-post purchase card in the article sidebar.

inc/helpers/aksrt-single.php

@@ -100,9 +100,16 @@ if (!function_exists('aksrt_single_build_context')) :
 			$show_pay_box = false;
 		}
 
-		$show_aside = function_exists('aksrt_is_show_sidebar')
-				? aksrt_is_show_sidebar()
-				: false;
+		$layout = function_exists('aksrt_get_post_show_layout')
+			? aksrt_get_post_show_layout($post_id)
+			: '';
+		$has_article_widgets = is_active_sidebar('all_sidebar_top')
+			|| is_active_sidebar('sidebar-article')
+			|| is_active_sidebar('all_sidebar_bottom');
+		$show_aside = !wp_is_mobile()
+			&& get_post_type($post_id) === 'post'
+			&& $layout !== 'no_sidebar'
+			&& $has_article_widgets;
 
 		return [
 			'post_id'           => $post_id,