Context menu purge: drop .js from the callback module specifier

The backend context menu appends .js itself when importing the callback module; with the extension already in the attribute the browser requested ssr-context-menu.js.js and the click died silently. Confirmed working in the backend after the fix.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/vitec/Classes/ContextMenu/SsrPurgeItemProvider.php

@@ -66,6 +66,7 @@ final class SsrPurgeItemProvider extends AbstractProvider
 
     protected function getAdditionalAttributes(string $itemName): array
     {
-        return ['data-callback-module' => '@evomedien/vitec/ssr-context-menu.js'];
+        // No ".js" here: the context menu JS appends it when importing.
+        return ['data-callback-module' => '@evomedien/vitec/ssr-context-menu'];
     }
 }