9024 workflow test serverless function follow up (#9066)

-  Fix Tablist style
- Fix dropdown style (wrong grey background)
- Update dropdown variable when no outputSchema is available 



https://github.com/user-attachments/assets/56698fe8-8dd3-404a-b2b2-f1eca6f5fa28

packages/twenty-front/src/modules/workflow/hooks/useTriggerNodeSelection.ts

@@ -21,9 +21,12 @@ export const useTriggerNodeSelection = () => {
       return;
     }
 
-    reactflow.updateNode(workflowDiagramTriggerNodeSelection, {
-      selected: true,
-    });
+    reactflow.setNodes((nodes) =>
+      nodes.map((node) => ({
+        ...node,
+        selected: workflowDiagramTriggerNodeSelection === node.id,
+      })),
+    );
 
     setWorkflowDiagramTriggerNodeSelection(undefined);
   }, [