fix(workflow): Remove duplicate Start node validation

- Skip Start node requirement in isRequiredNodesType loop since it's already covered by unified entry node validation
- Eliminates duplicate 'User Input must be added' error when trigger nodes are present
- Both useChecklist and useChecklistBeforePublish now consistently handle entry node validation
- Resolves UI showing redundant validation errors for Start vs Trigger nodes

web/app/components/workflow/hooks/use-checklist.ts

@@ -173,6 +173,10 @@ export const useChecklist = (nodes: Node[], edges: Edge[]) => {
     const isRequiredNodesType = Object.keys(nodesExtraData!).filter((key: any) => (nodesExtraData as any)[key].metaData.isRequired)
 
     isRequiredNodesType.forEach((type: string) => {
+      // Skip Start node requirement since we already check for any start/trigger nodes above
+      if (type === BlockEnum.Start)
+        return
+
       if (!filteredNodes.find(node => node.data.type === type)) {
         list.push({
           id: `${type}-need-added`,
@@ -335,6 +339,11 @@ export const useChecklistBeforePublish = () => {
 
     for (let i = 0; i < isRequiredNodesType.length; i++) {
       const type = isRequiredNodesType[i]
+
+      // Skip Start node requirement since we already check for any start/trigger nodes above
+      if (type === BlockEnum.Start)
+        continue
+
       if (!filteredNodes.find(node => node.data.type === type)) {
         notify({ type: 'error', message: t('workflow.common.needAdd', { node: t(`workflow.blocks.${type}`) }) })
         return false