Dev-Umgebung: Kompatibilität für PHP 8.3 + Smarty 4.5.6

- Smarty 4.1.1 → 4.5.6 (behebt dynamic property deprecations)
- Core-Klassen: #[\AllowDynamicProperties] für Admin_role, base, Config,
  Customer, Customer_group, CustomerGroups, Item, Structure, website
- website.class.php: counts[parent_id] initialisieren vor ++ (PHP 8.1)
- layout.class.php: HTTP_ACCEPT_LANGUAGE mit isset-Guard
- website_init.php: session_status()-Check vor session_start
- .htaccess: HTTPS-Redirect via X-Forwarded-Proto (statt SERVER_PORT)
- themes/easyshop_advanced/media/: Parent-Theme-Assets nachgezogen
- .gitignore: smarty.4.1.1.bak ausschließen

libs/smarty/docs/designers/language-variables/language-variable-scopes.md

@@ -0,0 +1,60 @@
+# Variable scopes
+
+You have the choice to assign variables to the scope of the main Smarty
+object, data objects created with [`createData()`](../../programmers/api-functions/api-create-data.md),
+and template objects created with
+[`createTemplate()`](../../programmers/api-functions/api-create-template.md). These objects can be
+chained. A template sees all the variables of its own object and all
+variables assigned to the objects in its chain of parent objects.
+
+By default, templates which are rendered by
+[`$smarty->display(...)`](../../programmers/api-functions/api-display.md) or
+[`$smarty->fetch(...)`](../../programmers/api-functions/api-fetch.md) calls are automatically linked to
+the Smarty object variable scope.
+
+By assigning variables to individual data or template objects you have
+full control which variables can be seen by a template.
+
+```php
+<?php
+// assign variable to Smarty object scope
+$smarty->assign('foo','smarty');
+
+// assign variables to data object scope
+$data = $smarty->createData();
+$data->assign('foo','data');
+$data->assign('bar','bar-data');
+
+// assign variables to other data object scope
+$data2 = $smarty->createData($data);
+$data2->assign('bar','bar-data2');
+
+// assign variable to template object scope
+$tpl = $smarty->createTemplate('index.tpl');
+$tpl->assign('bar','bar-template');
+
+// assign variable to template object scope with link to Smarty object
+$tpl2 = $smarty->createTemplate('index.tpl',$smarty);
+$tpl2->assign('bar','bar-template2');
+
+// This display() does see $foo='smarty' from the $smarty object
+$smarty->display('index.tpl');
+
+// This display() does see $foo='data' and $bar='bar-data' from the data object $data
+$smarty->display('index.tpl',$data);
+
+// This display() does see $foo='data' from the data object $data 
+// and $bar='bar-data2' from the data object $data2
+$smarty->display('index.tpl',$data2);
+
+// This display() does see $bar='bar-template' from the template object $tpl
+$tpl->display();  // or $smarty->display($tpl);
+
+// This display() does see $bar='bar-template2' from the template object $tpl2
+// and $foo='smarty' form the Smarty object $foo
+$tpl2->display();  // or $smarty->display($tpl2);
+```
+
+See also [`assign()`](../../programmers/api-functions/api-assign.md), 
+[`createData()`](../../programmers/api-functions/api-create-data.md)
+and [`createTemplate()`](../../programmers/api-functions/api-create-template.md).