Fix iterator creation (#17763)

On iterator creation, we get an error "Bad configuration". Looks like a
race condition with generation that happens before apollo cache gets
updated. Adding defensive checks

packages/twenty-front/src/modules/workflow/workflow-diagram/utils/generateNodesAndEdgesForIfElseNode.ts

@@ -66,7 +66,7 @@ export const generateNodesAndEdgesForIfElseNode = ({
 
   updatedNodes.push(ifElseNode);
 
-  const branches = step.settings.input.branches;
+  const branches = step.settings?.input?.branches ?? [];
   const totalBranches = branches.length;
 
   branches.forEach((branch, branchIndex) => {

packages/twenty-front/src/modules/workflow/workflow-diagram/utils/generateNodesAndEdgesForIteratorNode.ts

@@ -75,12 +75,11 @@ export const generateNodesAndEdgesForIteratorNode = ({
 
   updatedNodes.push(iteratorNode);
 
-  const initialLoopStepIds = Array.isArray(
-    step.settings.input.initialLoopStepIds,
-  )
-    ? step.settings.input.initialLoopStepIds
-    : isNonEmptyString(step.settings.input.initialLoopStepIds)
-      ? [step.settings.input.initialLoopStepIds]
+  const input = step.settings?.input;
+  const initialLoopStepIds = Array.isArray(input?.initialLoopStepIds)
+    ? input.initialLoopStepIds
+    : isNonEmptyString(input?.initialLoopStepIds)
+      ? [input.initialLoopStepIds]
       : [];
 
   for (const initialLoopStepId of initialLoopStepIds) {