Feat: add duplicate action to agent list (#14769) (#14856)

closes #14769 


### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

---------

Co-authored-by: Zhichang Yu <yuzhichang@gmail.com>

web/src/pages/agents/agent-dropdown.tsx

@@ -9,10 +9,10 @@ import {
   DropdownMenuSeparator,
   DropdownMenuTrigger,
 } from '@/components/ui/dropdown-menu';
-import { useDeleteAgent } from '@/hooks/use-agent-request';
+import { useDeleteAgent, useDuplicateAgent } from '@/hooks/use-agent-request';
 import { IFlow } from '@/interfaces/database/agent';
-import { PenLine, Tag, Trash2 } from 'lucide-react';
 import { MouseEventHandler, PropsWithChildren, useCallback, useState } from 'react';
+import { PenLine, Tag, Trash2 } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
 import { AgentTagEditor } from './agent-tag-editor';
 import { useRenameAgent } from './use-rename-agent';