Fix: Filter tags from Form Builder and admin contexts when DisplayMode is None (#87)

* Initial plan

* Fix tags showing in admin contexts like Form Builder

Co-authored-by: michalJakubis <64188398+michalJakubis@users.noreply.github.com>

* Improve null safety in IsAdminContext method

Co-authored-by: michalJakubis <64188398+michalJakubis@users.noreply.github.com>

* Render tag in web page context only

* Fix formatting

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: michalJakubis <64188398+michalJakubis@users.noreply.github.com>
Co-authored-by: michaljakubis <michalj@kentico.com>

Author: 3 people

src/Kentico.Xperience.TagManager/Rendering/CodeSnippetTagHelperComponent.cs

@@ -52,16 +52,17 @@ public override async Task ProcessAsync(TagHelperContext context, TagHelperOutpu
     {
         var contact = ContactManagementContext.CurrentContact;
 
-        // Get the current page's content type ID
-        int? contentTypeId = null;
-        if (webPageDataContextRetriever.TryRetrieve(out var webPageDataContext))
+        if (!webPageDataContextRetriever.TryRetrieve(out var webPageDataContext))
         {
-            var contentTypeName = webPageDataContext.WebPage.ContentTypeName;
-            var dataClass = DataClassInfoProvider.GetDataClassInfo(contentTypeName);
-
-            contentTypeId = dataClass?.ClassID;
+            return;
         }
 
+        var contentTypeName = webPageDataContext.WebPage.ContentTypeName;
+        var dataClass = DataClassInfoProvider.GetDataClassInfo(contentTypeName);
+
+        // Get the current page's content type ID
+        int? contentTypeId = dataClass?.ClassID;
+
         var codeSnippets = await codeSnippetsContext.GetConsentedCodeSnippets(contact, contentTypeId);
 
         if (string.Equals(context.TagName, HeadTag, StringComparison.OrdinalIgnoreCase))
@@ -155,6 +156,7 @@ private void ProcessBody(
         output.PostContent.AppendHtml(GetScriptSrcTag());
     }
 
+
     private IHtmlContent GetScriptSrcTag()
     {
         var urlHelper = urlHelperFactory.GetUrlHelper(ViewContext);