fix(workflow): clear loop/iteration metadata when pasting node outside container

When copying a node from inside a Loop/Iteration and pasting it outside,
the node was retaining loop-specific metadata (isInLoop, loop_id,
isInIteration, iteration_id, parentId), causing it to still be treated
as a loop child with restricted connections.

This fix clears these metadata fields when pasting a single node outside
of Loop/Iteration containers, ensuring the node behaves as an independent
workflow node.

Fixes #29835

web/app/components/workflow/hooks/use-nodes-interactions.ts

@@ -1609,6 +1609,8 @@ export const useNodesInteractions = () => {
         else {
           // single node paste
           const selectedNode = nodes.find(node => node.selected)
+          let pastedToNestedBlock = false
+
           if (selectedNode) {
             const commonNestedDisallowPasteNodes = [
               // end node only can be placed outermost layer
@@ -1630,6 +1632,7 @@ export const useNodesInteractions = () => {
               }
               // set position base on parent node
               newNode.position = getNestedNodePosition(newNode, selectedNode)
+              pastedToNestedBlock = true
             }
             else if (selectedNode.data.type === BlockEnum.Loop) {
               newNode.data.isInLoop = true
@@ -1641,8 +1644,20 @@ export const useNodesInteractions = () => {
               }
               // set position base on parent node
               newNode.position = getNestedNodePosition(newNode, selectedNode)
+              pastedToNestedBlock = true
             }
           }
+
+          // Clear loop/iteration metadata when pasting outside nested blocks (fixes #29835)
+          // This ensures nodes copied from inside Loop/Iteration are properly independent
+          // when pasted outside
+          if (!pastedToNestedBlock) {
+            newNode.data.isInLoop = false
+            newNode.data.loop_id = undefined
+            newNode.data.isInIteration = false
+            newNode.data.iteration_id = undefined
+            newNode.parentId = undefined
+          }
         }
 
         nodesToPaste.push(newNode)