test: test for the actual better clone- and make sure we use the JSON stringify and parse for this since tests are weird

ref: N25B-371

src/pages/VisProgPage/visualProgrammingUI/components/DragDropSidebar.tsx

@@ -1,9 +1,9 @@
 import { useDraggable } from '@neodrag/react';
 import { useReactFlow, type XYPosition } from '@xyflow/react';
 import { type ReactNode, useCallback, useRef, useState } from 'react';
-import useFlowStore from '../VisProgStores';
 import styles from '../../VisProg.module.css';
 import { NodeDefaults, type NodeTypes } from '../NodeRegistry'
+import addNode from '../utils/AddNode';
 
 /**
  * DraggableNodeProps dictates the type properties of a DraggableNode
@@ -47,41 +47,6 @@ function DraggableNode({ className, children, nodeType, onDrop }: DraggableNodeP
   );
 }
 
-/**
- * addNode — adds a new node to the flow using the unified class-based system.
- * Keeps numbering logic for phase/norm nodes.
- */
-function addNode(nodeType: keyof typeof NodeTypes, position: XYPosition) {
-  const { nodes, setNodes } = useFlowStore.getState();
-
-  // Find out if there's any default data about our ndoe
-  const defaultData = NodeDefaults[nodeType] ?? {}
-
-  // Currently, we find out what the Id is by checking the last node and adding one
-  const sameTypeNodes = nodes.filter((node) => node.type === nodeType);
-  const nextNumber =
-    sameTypeNodes.length > 0
-      ? (() => {
-          const lastNode = sameTypeNodes[sameTypeNodes.length - 1];
-          const parts = lastNode.id.split('-');
-          const lastNum = Number(parts[1]);
-          return Number.isNaN(lastNum) ? sameTypeNodes.length + 1 : lastNum + 1;
-        })()
-      : 1;
-  const id = `${nodeType}-${nextNumber}`;
-  
-  // Create new node
-  const newNode = {
-    id: id,
-    type: nodeType,
-    position,
-    // Deep copy using JSON because thats how things work:
-    // Ref: https://developer.mozilla.org/en-US/docs/Glossary/Deep_copy
-    data: structuredClone(defaultData)
-  }
-  setNodes([...nodes, newNode]);
-}
-
 /**
  * DndToolbar defines how the drag and drop toolbar component works
  * and includes the default onDrop behavior.