refactor(workflow): Remove Start node from isRequired mechanism

- Set Start node isRequired: false since entry node validation is handled by unified logic
- Remove conditional skip logic in checklist since Start is no longer in isRequiredNodesType
- Cleaner separation of concerns: unified entry node check vs individual required nodes
- Eliminates architectural inconsistency where Start was both individually required and part of group validation

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

@@ -173,10 +173,6 @@ 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`,
@@ -340,10 +336,6 @@ 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

web/app/components/workflow/nodes/start/default.ts

@@ -7,7 +7,7 @@ const metaData = genNodeMetaData({
   sort: 0.1,
   type: BlockEnum.Start,
   isStart: true,
-  isRequired: true,
+  isRequired: false,
   isSingleton: true,
   isTypeFixed: true,
 })