feat: enhance workflow node components with new condition handling and UI improvements

web/app/dashboard/ai-workflows/_components/workflow-node-palette.tsx

@@ -1,8 +1,7 @@
 "use client"
 
-import { PlusIcon } from "lucide-react"
-
 import type { AIWorkflowNodeSpec } from "@/lib/api/admin"
+import { WorkflowNodeIcon } from "./workflow-node-icon"
 
 export function WorkflowNodePalette({
   nodeSpecs,
@@ -22,10 +21,10 @@ export function WorkflowNodePalette({
             <button
               key={spec.type}
               type="button"
-              className="flex w-full items-start gap-2 rounded-sm px-2 py-2 text-left text-sm hover:bg-muted"
+              className="flex w-full items-start gap-2 rounded-md px-2 py-2 text-left text-sm transition-colors hover:bg-muted"
               onClick={() => onAddNode(spec)}
             >
-              <PlusIcon className="mt-0.5 size-3.5 shrink-0 text-muted-foreground" />
+              <WorkflowNodeIcon type={spec.type} size="sm" className="mt-0.5" />
               <span className="min-w-0">
                 <span className="block truncate font-medium">{spec.title || spec.type}</span>
                 <span className="line-clamp-2 text-xs text-muted-foreground">{spec.description}</span>