feat: add workflow duplication functionality with API endpoint and UI button

apps/web/src/pages/workflows/index.tsx

@@ -23,7 +23,7 @@ import {EmptyState} from '@plunk/ui';
 import {DashboardLayout} from '../../components/DashboardLayout';
 import {network} from '../../lib/network';
 import {formatRelativeTime} from '../../lib/dateUtils';
-import {Calendar, Edit, Plus, Power, PowerOff, Search, Trash2, Workflow as WorkflowIcon, X, Zap} from 'lucide-react';
+import {Calendar, Copy, Edit, Plus, Power, PowerOff, Search, Trash2, Workflow as WorkflowIcon, X, Zap} from 'lucide-react';
 import {NextSeo} from 'next-seo';
 import Link from 'next/link';
 import {useEffect, useState} from 'react';
@@ -66,6 +66,16 @@ export default function WorkflowsPage() {
     }
   };
 
+  const handleDuplicate = async (workflowId: string) => {
+    try {
+      await network.fetch('POST', `/workflows/${workflowId}/duplicate`);
+      toast.success('Workflow duplicated successfully');
+      void mutate();
+    } catch (error) {
+      toast.error(error instanceof Error ? error.message : 'Failed to duplicate workflow');
+    }
+  };
+
   const handleToggleEnabled = async (workflowId: string, currentlyEnabled: boolean) => {
     try {
       await network.fetch<Workflow, typeof WorkflowSchemas.update>('PATCH', `/workflows/${workflowId}`, {
@@ -219,6 +229,14 @@ export default function WorkflowsPage() {
                           <Button asChild variant="ghost" size="sm" title="Edit workflow">
                             <Link href={`/workflows/${workflow.id}`} aria-label="Edit workflow"><Edit className="h-4 w-4" /></Link>
                           </Button>
+                          <Button
+                            variant="ghost"
+                            size="sm"
+                            title="Duplicate workflow"
+                            onClick={() => handleDuplicate(workflow.id)}
+                          >
+                            <Copy className="h-4 w-4" />
+                          </Button>
                           <Button
                             variant="ghost"
                             size="sm"