feat(workflow): Allow paste node into nested block (#24234)

Co-authored-by: crab.huang <crab.huang@huolala.cn>

web/app/components/workflow/utils/node.ts

@@ -135,6 +135,13 @@ export const getTopLeftNodePosition = (nodes: Node[]) => {
   }
 }
 
+export const getNestedNodePosition = (node: Node, parentNode: Node) => {
+  return {
+    x: node.position.x - parentNode.position.x,
+    y: node.position.y - parentNode.position.y,
+  }
+}
+
 export const hasRetryNode = (nodeType?: BlockEnum) => {
   return nodeType === BlockEnum.LLM || nodeType === BlockEnum.Tool || nodeType === BlockEnum.HttpRequest || nodeType === BlockEnum.Code
 }