fix(frontend): match navigation icon divider spacing

inc/helpers/header/aksrt-header-navbar.php

@@ -343,7 +343,7 @@ if (!function_exists('aksrt_menu_button')) :
 			if ($unread > 0) {
 				$notification_but .= '<span class="aksrt-notification-badge">' . esc_html((string) min(99, $unread)) . '</span>';
 			}
-			$notification_but .= "</a></li>\n";
+			$notification_but .= '</a></li>';
 		}
 
 		$sign_but = '';
@@ -372,8 +372,8 @@ if (!function_exists('aksrt_menu_button')) :
 				. esc_attr__('打开搜索', 'aksrt') . '"><svg class="icon" aria-hidden="true"><use xlink:href="#icon-search"></use></svg></a></li>';
 		}
 
-		// Inline list items retain the reference whitespace between controls.
-		$sign_but .= "\n";
+		// Match the reference's adjacent inline items; text whitespace adds a gap
+		// before each divider on top of the list item's own horizontal padding.
 		$account = '<ul class="list-inline splitters relative">'
 			. $notification_but . $sign_but . $search_but . '</ul>';