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

[Rene0422]

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)
• New Feature (non-breaking change which adds functionality)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: d7e8616d-ac38-439c-bfc1-63e408d536fe

📥 Commits

Reviewing files that changed from the base of the PR and between 5457fc5 and 2e37229.

📒 Files selected for processing (2)

• web/src/hooks/use-agent-request.ts
• web/src/locales/en.ts

✅ Files skipped from review due to trivial changes (1)

• web/src/locales/en.ts

🚧 Files skipped from review as they are similar to previous changes (1)

• web/src/hooks/use-agent-request.ts

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📝 Walkthrough

Walkthrough

Adds a React Query-based useDuplicateAgent hook that clones an agent with copied DSL/config and localized "(Copy)" naming, integrates it into the agent dropdown menu via a new duplicate action with loading state management, and includes English and Chinese UI translations for the duplicate button and copy naming pattern.

Changes

Agent Duplication Feature

Layer / File(s)	Summary
Agent duplication hook and localized naming web/src/hooks/use-agent-request.ts, web/src/locales/en.ts, web/src/locales/zh.ts	useDuplicateAgent hook performs agent duplication (fetch source details, create new agent with copied DSL/config and localized "(Copy)" name suffix, invalidate agent list), returning mutation state and trigger function. Translation keys added for "Duplicate" button label and "{{name}} (Copy)" naming pattern in English (duplicate, copyOfAgentName) and Chinese locales.
Dropdown menu duplicate action wiring web/src/pages/agents/agent-dropdown.tsx	AgentDropdown imports useDuplicateAgent hook and Copy icon, extracts mutation state, defines handleDuplicate handler that guards against concurrent requests, and wires a new menu item that triggers duplication with the current agent's id and title.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• infiniflow/ragflow#14157: Updates agent API wiring and hooks in the same files, providing context for agent request patterns and mutation handling.

Suggested labels

💞 feature, lgtm

Suggested reviewers

• wangq8

Poem

🐰 A curious rabbit taps the key,
"Duplicate" — two agents now we see,
Copy the DSL, the avatar, the name,
A tidy clone, and nothing left to tame.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The PR description partially fills the template with the issue reference and correctly marks it as a New Feature, but provides no explanation of what problem the PR solves.	Add a brief explanation under 'What problem does this PR solve?' describing the duplicate functionality being implemented to help reviewers understand the context.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main feature addition: a duplicate action for agents in the list view.
Linked Issues check	✅ Passed	The PR implements the core duplicate agent functionality from issue #14769, including new React hook, translations, and UI integration for duplication with proper data copying and success/error handling.
Out of Scope Changes check	✅ Passed	All changes are directly related to implementing the duplicate agent feature: new hook, translation keys, and dropdown menu integration with no extraneous modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

⚔️ Resolve merge conflicts

• Resolve merge conflict in branch feat/duplicate-agent

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@web/src/hooks/use-agent-request.ts`:
- Around line 253-279: The mutationFn in useDuplicateAgent currently only shows
success and can fail silently; wrap the agentService.getAgent and
agentService.createAgent calls in a try/catch, explicitly check for missing
source (detail?.data) and non-success create responses (data?.code !== 0) and
call message.error with a translated error message (use i18n.t) in those
branches, ensure the catch logs the error and shows message.error, and return
null on failure so callers know the duplication failed; reference the
mutationFn, agentService.getAgent, agentService.createAgent, and
useDuplicateAgent when making the changes.

In `@web/src/locales/en.ts`:
- Line 2438: The translation key copyOfAgentName currently uses title case for
the parenthetical text; update the value of copyOfAgentName to use sentence case
by changing the parenthesis from '(Copy)' to '(copy)' so the string becomes
'{{name}} (copy)' to match the sentence case convention used in
src/locales/en.ts.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 593ce1ff-085b-42a3-ad3a-6cab5ab260f3

📥 Commits

Reviewing files that changed from the base of the PR and between 5e46457 and 5457fc5.

📒 Files selected for processing (4)

• web/src/hooks/use-agent-request.ts
• web/src/locales/en.ts
• web/src/locales/zh.ts
• web/src/pages/agents/agent-dropdown.tsx