fix(editor): Prevent execution data from leaking into workflow diffs UI (#18605)

Co-authored-by: Csaba Tuncsik <csaba@n8n.io>

packages/frontend/editor-ui/src/utils/workflowUtils.ts

@@ -0,0 +1,27 @@
+import type { IWorkflowDb, INodeUi } from '@/Interface';
+
+/**
+ * Removes execution data from workflow nodes and workflow-level execution data
+ * to ensure clean comparisons in diffs. This prevents execution status, run data,
+ * pinned data, and other runtime information from appearing in workflow difference
+ * comparisons.
+ */
+export function removeWorkflowExecutionData(
+	workflow: IWorkflowDb | undefined,
+): IWorkflowDb | undefined {
+	if (!workflow) return workflow;
+
+	// Remove workflow-level execution data and clean up nodes
+	const { pinData, ...cleanWorkflow } = workflow;
+
+	const sanitizedWorkflow: IWorkflowDb = {
+		...cleanWorkflow,
+		nodes: workflow.nodes.map((node: INodeUi) => {
+			// Create a clean copy without execution-related data
+			const { issues, pinData, ...cleanNode } = node;
+			return cleanNode;
+		}),
+	};
+
+	return sanitizedWorkflow;
+}