Fixed issues on the tags for groping logic on request right side panel

Examples/Nodify.Calculator/OperationsMenuViewModel.cs

@@ -376,7 +376,9 @@ namespace Nodify.Calculator
                 foreach (var method in path.Value)
                 {
                     // Determine swagger group from operation tags or path segments
-                    var tag = method.Value.Tags?.FirstOrDefault();
+                    var tag = (method.Value.Tags != null && method.Value.Tags.Count > 0)
+                        ? method.Value.Tags[0]
+                        : null;
                     var group = !string.IsNullOrEmpty(tag)
                         ? tag
                         : ExtractGroupFromPath(path.Key);
@@ -602,12 +604,16 @@ namespace Nodify.Calculator
 
                 foreach (var saved in savedNodes)
                 {
+                    var savedGroup = saved.SwaggerGroup;
+                    if (string.IsNullOrEmpty(savedGroup))
+                        savedGroup = ExtractGroupFromPath(saved.Title ?? "");
+
                     var ovmodel = new OperationInfoViewModel
                     {
                         Title = saved.Title,
                         OPType = saved.OPType,
                         Type = OperationType.API,
-                        SwaggerGroup = saved.SwaggerGroup ?? string.Empty
+                        SwaggerGroup = savedGroup
                     };
 
                     foreach (var inputName in saved.InputNames)