[CLEAN] Synthetic Benchmark PR #30803 - refactor(web): extract isServer/isClient utility & upgrade Node.js to 22.12.0

[ofir-frd]

Benchmark PR langgenius#30803

Type: Clean (correct implementation)

Original PR Title: refactor(web): extract isServer/isClient utility & upgrade Node.js to 22.12.0
Original PR Description: ## Summary

• Created centralized isServer/isClient utility at /web/utils/client.ts
• Migrated 16 occurrences of typeof window === 'undefined' across 9 files to use the new utility
• Improves code maintainability, consistency, and reduces cognitive load
• Upgraded Node.js minimum version to 22.12.0 for jsdom 27 compatibility (see chore(web): Upgrade Node.js minimum version to 22.12.0 for jsdom 27 compatibility langgenius/dify#30807)

Why not use TanStack Query's isServer?

TanStack Query exports:

export const isServer = typeof window === 'undefined' || 'Deno' in globalThis

We don't need Deno detection because:

• Dify is a Next.js application running on Node.js
• Deno is a different JavaScript runtime that Dify doesn't target
• TanStack Query includes Deno check because it's a universal library supporting multiple runtimes
• Our application code only needs to handle our own runtime environments

Changes

New File

• web/utils/client.ts - Exports isServer and isClient boolean constants

Migrated Files

File	Occurrences
featured-tools.tsx	3
featured-triggers.tsx	3
rag-tool-recommendations/index.tsx	3
embedded-chatbot/header/index.tsx	1
query-client.tsx	1
use-trigger-events-limit-modal.ts	1
list.tsx	1
gtag.ts	1
use-query-params.ts	1

Node.js Version Update

File	Change
.nvmrc	22.11.0 → 22.20.0
web/package.json engines	>=v22.11.0 → >=22.12.0

This fixes jsdom 27.3.0 + parse5 8.0.0 ESM compatibility. Node.js 22.12.0+ has require(esm) enabled by default.

Benefits

• ✂️ DRY principle: 16 repeated checks → 1 utility function
• 🧠 Better readability: if (isServer) is clearer than if (typeof window === 'undefined')
• 🔄 Improved consistency: unified environment detection pattern
• 🛠️ Easier maintenance: change logic in one place if needed
• 🐛 Fewer typos: no risk of misspelling 'undefined'

Test plan

• pnpm lint:fix passes
• pnpm type-check:tsgo passes
• pnpm test passes (27/27 tests)
• Manual testing of affected components (localStorage persistence, SSR behavior)

Closes langgenius#30802
Closes langgenius#30807
Original PR URL: langgenius#30803