refactor: add publish route to AI workflow and adjust header styling in workflow workbench

internal/bootstrap/routes.go

@@ -238,6 +238,7 @@ func registerDashboardAIWorkflowRoutes(group *gin.RouterGroup) {
 	group.GET("/default-definition", dashboard.AIWorkflowGetDefaultDefinition)
 	group.GET("/template/list", dashboard.AIWorkflowGetTemplateList)
 	group.POST("/validate", dashboard.AIWorkflowPostValidate)
+	group.POST("/publish", dashboard.AIWorkflowPostPublish)
 	group.Any("/run/list", dashboard.AIWorkflowAnyRunList)
 	group.GET("/run/:id", dashboard.AIWorkflowGetRunBy)
 	group.Any("/version/list", dashboard.AIWorkflowAnyVersionList)

web/app/dashboard/ai-workflows/_components/workflow-workbench.tsx

@@ -222,7 +222,7 @@ export function WorkflowWorkbench({
 
   return (
     <div className="flex h-full min-h-0 flex-col overflow-hidden bg-background">
-      <header className="shrink-0 border-b px-4 py-2">
+      <header className="shrink-0 border-b px-4 py-1.5">
         <div className="flex items-center gap-4">
           <div className="min-w-0 flex-1">
             <div className="flex items-center gap-2">
@@ -260,6 +260,7 @@ export function WorkflowWorkbench({
               发布版本
             </Button>
           </div>
+          <div className="w-20 shrink-0" aria-hidden="true" />
         </div>
       </header>