test: use happy dom (#34154)

web/app/components/app/app-access-control/access-control.spec.tsx

@@ -109,7 +109,7 @@ beforeAll(() => {
     disconnect = vi.fn(() => undefined)
     unobserve = vi.fn(() => undefined)
   }
-  // @ts-expect-error jsdom does not implement IntersectionObserver
+  // @ts-expect-error test DOM typings do not guarantee IntersectionObserver here
   globalThis.IntersectionObserver = MockIntersectionObserver
 })
 

web/app/components/app/configuration/debug/debug-with-multiple-model/index.spec.tsx

@@ -556,8 +556,8 @@ describe('DebugWithMultipleModel', () => {
       )
 
       const twoItems = screen.getAllByTestId('debug-item')
-      expect(twoItems[0].style.width).toBe('calc(50% - 28px)')
+      expect(twoItems[0].style.width).toBe('calc(50% - 4px - 24px)')
-      expect(twoItems[1].style.width).toBe('calc(50% - 28px)')
+      expect(twoItems[1].style.width).toBe('calc(50% - 4px - 24px)')
     })
   })
 
@@ -596,13 +596,13 @@ describe('DebugWithMultipleModel', () => {
       // Assert
       expect(items).toHaveLength(2)
       expectItemLayout(items[0], {
-        width: 'calc(50% - 28px)',
+        width: 'calc(50% - 4px - 24px)',
         height: '100%',
         transform: 'translateX(0) translateY(0)',
         classes: ['mr-2'],
       })
       expectItemLayout(items[1], {
-        width: 'calc(50% - 28px)',
+        width: 'calc(50% - 4px - 24px)',
         height: '100%',
         transform: 'translateX(calc(100% + 8px)) translateY(0)',
         classes: [],
@@ -620,19 +620,19 @@ describe('DebugWithMultipleModel', () => {
       // Assert
       expect(items).toHaveLength(3)
       expectItemLayout(items[0], {
-        width: 'calc(33.3% - 21.33px)',
+        width: 'calc(33.3% - 5.33px - 16px)',
         height: '100%',
         transform: 'translateX(0) translateY(0)',
         classes: ['mr-2'],
       })
       expectItemLayout(items[1], {
-        width: 'calc(33.3% - 21.33px)',
+        width: 'calc(33.3% - 5.33px - 16px)',
         height: '100%',
         transform: 'translateX(calc(100% + 8px)) translateY(0)',
         classes: ['mr-2'],
       })
       expectItemLayout(items[2], {
-        width: 'calc(33.3% - 21.33px)',
+        width: 'calc(33.3% - 5.33px - 16px)',
         height: '100%',
         transform: 'translateX(calc(200% + 16px)) translateY(0)',
         classes: [],
@@ -655,25 +655,25 @@ describe('DebugWithMultipleModel', () => {
       // Assert
       expect(items).toHaveLength(4)
       expectItemLayout(items[0], {
-        width: 'calc(50% - 28px)',
+        width: 'calc(50% - 4px - 24px)',
         height: 'calc(50% - 4px)',
         transform: 'translateX(0) translateY(0)',
         classes: ['mr-2', 'mb-2'],
       })
       expectItemLayout(items[1], {
-        width: 'calc(50% - 28px)',
+        width: 'calc(50% - 4px - 24px)',
         height: 'calc(50% - 4px)',
         transform: 'translateX(calc(100% + 8px)) translateY(0)',
         classes: ['mb-2'],
       })
       expectItemLayout(items[2], {
-        width: 'calc(50% - 28px)',
+        width: 'calc(50% - 4px - 24px)',
         height: 'calc(50% - 4px)',
         transform: 'translateX(0) translateY(calc(100% + 8px))',
         classes: ['mr-2'],
       })
       expectItemLayout(items[3], {
-        width: 'calc(50% - 28px)',
+        width: 'calc(50% - 4px - 24px)',
         height: 'calc(50% - 4px)',
         transform: 'translateX(calc(100% + 8px)) translateY(calc(100% + 8px))',
         classes: [],

web/app/components/app/overview/settings/index.spec.tsx

@@ -1,6 +1,3 @@
-/**
- * @vitest-environment jsdom
- */
 import type { ReactNode } from 'react'
 import type { ModalContextState } from '@/context/modal-context'
 import type { ProviderContextState } from '@/context/provider-context'

web/app/components/base/action-button/__tests__/index.spec.tsx

@@ -62,8 +62,8 @@ describe('ActionButton', () => {
     )
     const button = screen.getByRole('button', { name: 'Custom Style' })
     expect(button).toHaveStyle({
-      color: 'rgb(255, 0, 0)',
+      color: 'red',
-      backgroundColor: 'rgb(0, 0, 255)',
+      backgroundColor: 'blue',
     })
   })
 

web/app/components/base/chat/chat/__tests__/index.spec.tsx

@@ -8,10 +8,10 @@ import Chat from '../index'
 // ─── Why each mock exists ─────────────────────────────────────────────────────
 //
 // Answer        – transitively pulls Markdown (rehype/remark/katex), AgentContent,
-//                 WorkflowProcessItem and Operation; none can resolve in jsdom.
+//                 WorkflowProcessItem and Operation; none can resolve in the test DOM runtime.
 // Question      – pulls Markdown, copy-to-clipboard, react-textarea-autosize.
 // ChatInputArea – pulls js-audio-recorder (requires Web Audio API unavailable in
-//                 jsdom) and VoiceInput / FileContextProvider chains.
+//                 the test DOM runtime) and VoiceInput / FileContextProvider chains.
 // PromptLogModal– pulls CopyFeedbackNew and deep modal dep chain.
 // AgentLogModal – pulls @remixicon/react (causes lint push error), useClickAway
 //                 from ahooks, and AgentLogDetail (workflow graph renderer).

web/app/components/base/date-and-time-picker/calendar/__tests__/index.spec.tsx

@@ -3,7 +3,7 @@ import { fireEvent, render, screen } from '@testing-library/react'
 import dayjs from '../../utils/dayjs'
 import Calendar from '../index'
 
-// Mock scrollIntoView since jsdom doesn't implement it
+// Mock scrollIntoView since the test DOM runtime doesn't implement it
 beforeAll(() => {
   Element.prototype.scrollIntoView = vi.fn()
 })

web/app/components/base/date-and-time-picker/time-picker/__tests__/index.spec.tsx

@@ -3,7 +3,7 @@ import { fireEvent, render, screen, within } from '@testing-library/react'
 import dayjs, { isDayjsObject } from '../../utils/dayjs'
 import TimePicker from '../index'
 
-// Mock scrollIntoView since jsdom doesn't implement it
+// Mock scrollIntoView since the test DOM runtime doesn't implement it
 beforeAll(() => {
   Element.prototype.scrollIntoView = vi.fn()
 })

web/app/components/base/file-uploader/file-from-link-or-local/index.tsx

@@ -37,11 +37,11 @@ const FileFromLinkOrLocal = ({
   const { handleLoadFileFromLink } = useFile(fileConfig)
   const disabled = !!fileConfig.number_limits && files.length >= fileConfig.number_limits
   const fileLinkPlaceholder = t('fileUploader.pasteFileLinkInputPlaceholder', { ns: 'common' })
-  /* v8 ignore next -- fallback for missing i18n key is not reliably testable under current global translation mocks in jsdom @preserve */
+  /* v8 ignore next -- fallback for a missing i18n key is not reliably testable under the current global translation mocks in the test DOM runtime. @preserve */
   const fileLinkPlaceholderText = fileLinkPlaceholder || ''
 
   const handleSaveUrl = () => {
-    /* v8 ignore next -- guarded by UI-level disabled state (`disabled={!url || disabled}`), not reachable in jsdom click flow  @preserve */
+    /* v8 ignore next -- guarded by UI-level disabled state (`disabled={!url || disabled}`), not reachable in the current test click flow. @preserve */
     if (!url)
       return
 

web/app/components/base/icons/__tests__/utils.spec.ts

@@ -62,7 +62,7 @@ describe('generate icon base utils', () => {
       const { container } = render(generate(node, 'key'))
       // to svg element
       expect(container.firstChild).toHaveClass('container')
-      expect(container.querySelector('span')).toHaveStyle({ color: 'rgb(0, 0, 255)' })
+      expect(container.querySelector('span')).toHaveStyle({ color: 'blue' })
     })
 
     // add not has children

web/app/components/base/input/__tests__/index.spec.tsx

@@ -99,7 +99,7 @@ describe('Input component', () => {
     render(<Input className={customClass} styleCss={customStyle} />)
     const input = screen.getByPlaceholderText(/input/i)
     expect(input).toHaveClass(customClass)
-    expect(input).toHaveStyle({ color: 'rgb(255, 0, 0)' })
+    expect(input).toHaveStyle({ color: 'red' })
   })
 
   it('applies large size variant correctly', () => {

web/app/components/base/markdown-blocks/__tests__/code-block.spec.tsx

@@ -1,6 +1,6 @@
-import { createRequire } from 'node:module'
 import { act, render, screen, waitFor } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
+import * as echarts from 'echarts'
 import { Theme } from '@/types/app'
 
 import CodeBlock from '../code-block'
@@ -10,12 +10,21 @@ type UseThemeReturn = {
 }
 
 const mockUseTheme = vi.fn<() => UseThemeReturn>(() => ({ theme: Theme.light }))
-const require = createRequire(import.meta.url)
+const mockEcharts = vi.hoisted(() => {
-const echartsCjs = require('echarts') as {
+  const state = {
-  getInstanceByDom: (dom: HTMLDivElement | null) => {
+    finishedHandler: undefined as undefined | ((event?: unknown) => void),
-    resize: (opts?: { width?: string, height?: string }) => void
+    echartsInstance: {
-  } | null
+      resize: vi.fn<(opts?: { width?: string, height?: string }) => void>(),
-}
+      trigger: vi.fn((eventName: string, event?: unknown) => {
+        if (eventName === 'finished')
+          state.finishedHandler?.(event)
+      }),
+    },
+    getInstanceByDom: vi.fn(() => state.echartsInstance),
+  }
+
+  return state
+})
 
 let clientWidthSpy: { mockRestore: () => void } | null = null
 let clientHeightSpy: { mockRestore: () => void } | null = null
@@ -61,6 +70,42 @@ vi.mock('@/hooks/use-theme', () => ({
   default: () => mockUseTheme(),
 }))
 
+vi.mock('echarts', () => ({
+  getInstanceByDom: mockEcharts.getInstanceByDom,
+}))
+
+vi.mock('echarts-for-react', async () => {
+  const React = await vi.importActual<typeof import('react')>('react')
+
+  const MockReactEcharts = React.forwardRef(({
+    onChartReady,
+    onEvents,
+  }: {
+    onChartReady?: (instance: typeof mockEcharts.echartsInstance) => void
+    onEvents?: { finished?: (event?: unknown) => void }
+  }, ref: React.ForwardedRef<{ getEchartsInstance: () => typeof mockEcharts.echartsInstance }>) => {
+    React.useImperativeHandle(ref, () => ({
+      getEchartsInstance: () => mockEcharts.echartsInstance,
+    }))
+
+    React.useEffect(() => {
+      mockEcharts.finishedHandler = onEvents?.finished
+      onChartReady?.(mockEcharts.echartsInstance)
+      onEvents?.finished?.({})
+      return () => {
+        mockEcharts.finishedHandler = undefined
+      }
+    }, [onChartReady, onEvents])
+
+    return <div className="echarts-for-react" />
+  })
+
+  return {
+    __esModule: true,
+    default: MockReactEcharts,
+  }
+})
+
 vi.mock('@/app/components/base/mermaid', () => ({
   __esModule: true,
   default: ({ PrimitiveCode }: { PrimitiveCode: string }) => <div data-testid="mock-mermaid">{PrimitiveCode}</div>,
@@ -76,9 +121,9 @@ const findEchartsHost = async () => {
 const findEchartsInstance = async () => {
   const host = await findEchartsHost()
   await waitFor(() => {
-    expect(echartsCjs.getInstanceByDom(host)).toBeTruthy()
+    expect(echarts.getInstanceByDom(host)).toBeTruthy()
   })
-  return echartsCjs.getInstanceByDom(host)!
+  return echarts.getInstanceByDom(host)!
 }
 
 describe('CodeBlock', () => {

web/app/components/base/node-status/__tests__/index.spec.tsx

@@ -41,7 +41,7 @@ describe('NodeStatus', () => {
 
   it('applies styleCss correctly', () => {
     const { container } = render(<NodeStatus styleCss={{ color: 'red' }} />)
-    expect(container.firstChild).toHaveStyle({ color: 'rgb(255, 0, 0)' })
+    expect(container.firstChild).toHaveStyle({ color: 'red' })
   })
 
   it('applies iconClassName to the icon', () => {

web/app/components/base/pagination/__tests__/pagination.spec.tsx

@@ -131,7 +131,7 @@ describe('Pagination', () => {
         setCurrentPage,
         children: <Pagination.PrevButton>Prev</Pagination.PrevButton>,
       })
-      fireEvent.keyPress(screen.getByText(/prev/i), { key: 'Enter', charCode: 13 })
+      fireEvent.keyDown(screen.getByText(/prev/i).closest('button')!, { key: 'Enter', code: 'Enter', keyCode: 13, which: 13 })
       expect(setCurrentPage).toHaveBeenCalledWith(2)
     })
 
@@ -142,7 +142,7 @@ describe('Pagination', () => {
         setCurrentPage,
         children: <Pagination.PrevButton>Prev</Pagination.PrevButton>,
       })
-      fireEvent.keyPress(screen.getByText(/prev/i), { key: 'Enter', charCode: 13 })
+      fireEvent.keyDown(screen.getByText(/prev/i).closest('button')!, { key: 'Enter', code: 'Enter', keyCode: 13, which: 13 })
       expect(setCurrentPage).not.toHaveBeenCalled()
     })
 
@@ -213,7 +213,7 @@ describe('Pagination', () => {
         setCurrentPage,
         children: <Pagination.NextButton>Next</Pagination.NextButton>,
       })
-      fireEvent.keyPress(screen.getByText(/next/i), { key: 'Enter', charCode: 13 })
+      fireEvent.keyDown(screen.getByText(/next/i).closest('button')!, { key: 'Enter', code: 'Enter', keyCode: 13, which: 13 })
       expect(setCurrentPage).toHaveBeenCalledWith(1)
     })
 
@@ -225,7 +225,7 @@ describe('Pagination', () => {
         setCurrentPage,
         children: <Pagination.NextButton>Next</Pagination.NextButton>,
       })
-      fireEvent.keyPress(screen.getByText(/next/i), { key: 'Enter', charCode: 13 })
+      fireEvent.keyDown(screen.getByText(/next/i).closest('button')!, { key: 'Enter', code: 'Enter', keyCode: 13, which: 13 })
       expect(setCurrentPage).not.toHaveBeenCalled()
     })
 
@@ -318,7 +318,7 @@ describe('Pagination', () => {
           />
         ),
       })
-      fireEvent.keyPress(screen.getByText('4'), { key: 'Enter', charCode: 13 })
+      fireEvent.keyDown(screen.getByText('4').closest('a')!, { key: 'Enter', code: 'Enter', keyCode: 13, which: 13 })
       expect(setCurrentPage).toHaveBeenCalledWith(3) // 0-indexed
     })
 

web/app/components/base/pagination/pagination.tsx

@@ -50,7 +50,7 @@ export const PrevButton = ({
       tabIndex={disabled ? '-1' : 0}
       disabled={disabled}
       data-testid={dataTestId}
-      onKeyPress={(event: React.KeyboardEvent) => {
+      onKeyDown={(event: React.KeyboardEvent) => {
         event.preventDefault()
         if (event.key === 'Enter' && !disabled)
           previous()
@@ -85,7 +85,7 @@ export const NextButton = ({
       tabIndex={disabled ? '-1' : 0}
       disabled={disabled}
       data-testid={dataTestId}
-      onKeyPress={(event: React.KeyboardEvent) => {
+      onKeyDown={(event: React.KeyboardEvent) => {
         event.preventDefault()
         if (event.key === 'Enter' && !disabled)
           next()
@@ -140,7 +140,7 @@ export const PageButton = ({
           }) || undefined
         }
         tabIndex={0}
-        onKeyPress={(event: React.KeyboardEvent) => {
+        onKeyDown={(event: React.KeyboardEvent) => {
           if (event.key === 'Enter')
             pagination.setCurrentPage(page - 1)
         }}

web/app/components/base/premium-badge/__tests__/index.spec.tsx

@@ -41,6 +41,6 @@ describe('PremiumBadge', () => {
     )
     const badge = screen.getByText('Premium')
     expect(badge).toBeInTheDocument()
-    expect(badge).toHaveStyle('background-color: rgb(255, 0, 0)') // Note: React converts 'red' to 'rgb(255, 0, 0)'
+    expect(badge).toHaveStyle('background-color: red')
   })
 })

web/app/components/base/prompt-editor/plugins/shortcuts-popup-plugin/index.tsx

@@ -141,7 +141,7 @@ export default function ShortcutsPopupPlugin({
   const portalRef = useRef<HTMLDivElement | null>(null)
   const lastSelectionRef = useRef<Range | null>(null)
 
-  /* v8 ignore next -- defensive non-browser fallback; this client-only plugin runs where document exists (browser/jsdom). @preserve */
+  /* v8 ignore next -- defensive non-browser fallback; this client-only plugin runs where document exists (browser/test DOM runtime). @preserve */
   const containerEl = useMemo(() => container ?? (typeof document !== 'undefined' ? document.body : null), [container])
   const useContainer = !!containerEl && containerEl !== document.body
 
@@ -210,7 +210,7 @@ export default function ShortcutsPopupPlugin({
 
       if (rect.width === 0 && rect.height === 0) {
         const root = editor.getRootElement()
-        /* v8 ignore next 10 -- zero-size rect recovery depends on browser layout/selection geometry; deterministic reproduction in jsdom is unreliable. @preserve */
+        /* v8 ignore next 10 -- zero-size rect recovery depends on browser layout/selection geometry; deterministic reproduction in the test DOM runtime is unreliable. @preserve */
         if (root) {
           const sc = range.startContainer
           const node = sc.nodeType === Node.ELEMENT_NODE

web/app/components/datasets/create-from-pipeline/create-options/create-from-dsl-modal/__tests__/index.spec.tsx

@@ -1612,9 +1612,7 @@ describe('Uploader', () => {
       if (!dropArea)
         return
 
-      fireEvent.drop(dropArea, {
+      fireEvent.drop(dropArea)
-        dataTransfer: null,
-      })
 
       expect(updateFile).not.toHaveBeenCalled()
     })

web/app/components/datasets/create/website/watercrawl/__tests__/index.spec.tsx

@@ -1,6 +1,3 @@
-/**
- * @vitest-environment jsdom
- */
 import type { Mock } from 'vitest'
 import type { CrawlOptions, CrawlResultItem } from '@/models/datasets'
 import { fireEvent, render, screen, waitFor } from '@testing-library/react'

web/app/components/develop/__tests__/code.spec.tsx

@@ -11,7 +11,7 @@ describe('code.tsx components', () => {
     vi.clearAllMocks()
     vi.spyOn(console, 'error').mockImplementation(() => {})
     vi.useFakeTimers({ shouldAdvanceTime: true })
-    // jsdom does not implement scrollBy; mock it to prevent stderr noise
+    // The test DOM runtime does not implement scrollBy; mock it to prevent stderr noise
     window.scrollBy = vi.fn()
   })
 

web/app/components/develop/__tests__/use-doc-toc.spec.ts

@@ -307,7 +307,7 @@ describe('useDocToc', () => {
 
     it('should update activeSection when scrolling past a section', async () => {
       vi.useFakeTimers()
-      // innerHeight/2 = 384 in jsdom (default 768), so top <= 384 means "scrolled past"
+      // innerHeight/2 = 384 with the default test viewport height (768), so top <= 384 means "scrolled past"
       const { scrollContainer, cleanup } = setupScrollDOM([
         { id: 'intro', text: 'Intro', top: 100 },
         { id: 'details', text: 'Details', top: 600 },

web/app/components/header/account-setting/model-provider-page/model-auth/__tests__/add-custom-model.spec.tsx

@@ -43,7 +43,7 @@ vi.mock('@/app/components/base/tooltip', () => ({
   ),
 }))
 
-// Mock portal components to avoid async/jsdom issues (consistent with sibling tests)
+// Mock portal components to avoid async test DOM issues (consistent with sibling tests)
 vi.mock('@/app/components/base/portal-to-follow-elem', () => ({
   PortalToFollowElem: ({ children, open }: { children: React.ReactNode, open: boolean, onOpenChange: (open: boolean) => void }) => (
     <div data-testid="portal" data-open={open}>

web/app/components/plugins/plugin-detail-panel/__tests__/endpoint-card.spec.tsx

@@ -142,7 +142,7 @@ describe('EndpointCard', () => {
     failureFlags.disable = false
     failureFlags.delete = false
     failureFlags.update = false
-    // Polyfill document.execCommand for copy-to-clipboard in jsdom
+    // Polyfill document.execCommand for copy-to-clipboard in the test DOM runtime
     if (typeof document.execCommand !== 'function') {
       document.execCommand = vi.fn().mockReturnValue(true)
     }

web/app/components/plugins/plugin-detail-panel/subscription-list/create/__tests__/oauth-client.spec.tsx

@@ -102,10 +102,12 @@ vi.mock('@/app/components/base/ui/toast', () => ({
 }))
 
 const mockClipboardWriteText = vi.fn()
-Object.assign(navigator, {
+Object.defineProperty(navigator, 'clipboard', {
-  clipboard: {
+  value: {
     writeText: mockClipboardWriteText,
   },
+  configurable: true,
+  writable: true,
 })
 
 vi.mock('@/app/components/base/modal/modal', () => ({
@@ -192,6 +194,13 @@ describe('OAuthClientSettingsModal', () => {
     vi.clearAllMocks()
     mockUsePluginStore.mockReturnValue(mockPluginDetail)
     mockClipboardWriteText.mockResolvedValue(undefined)
+    Object.defineProperty(navigator, 'clipboard', {
+      value: {
+        writeText: mockClipboardWriteText,
+      },
+      configurable: true,
+      writable: true,
+    })
     setMockFormValues({
       values: { client_id: 'test-client-id', client_secret: 'test-client-secret' },
       isCheckValidated: true,

web/app/components/workflow/__tests__/custom-edge-linear-gradient-render.spec.tsx

@@ -48,10 +48,10 @@ describe('CustomEdgeLinearGradientRender', () => {
     const stops = container.querySelectorAll('stop')
     expect(stops).toHaveLength(2)
     expect(stops[0]).toHaveAttribute('offset', '0%')
-    expect(stops[0].getAttribute('style')).toContain('stop-color: rgb(17, 17, 17)')
+    expect(stops[0].getAttribute('style')).toContain('stop-color: #111111')
     expect(stops[0].getAttribute('style')).toContain('stop-opacity: 1')
     expect(stops[1]).toHaveAttribute('offset', '100%')
-    expect(stops[1].getAttribute('style')).toContain('stop-color: rgb(34, 34, 34)')
+    expect(stops[1].getAttribute('style')).toContain('stop-color: #222222')
     expect(stops[1].getAttribute('style')).toContain('stop-opacity: 1')
   })
 })

web/app/components/workflow/__tests__/update-dsl-modal.spec.tsx

@@ -209,7 +209,7 @@ describe('UpdateDSLModal', () => {
     })
 
     await waitFor(() => {
-      expect(screen.getByRole('button', { name: 'app.newApp.Cancel' })).toBeInTheDocument()
+      expect(screen.getByRole('button', { name: 'app.newApp.Confirm' })).toBeInTheDocument()
     }, { timeout: 1000 })
 
     fireEvent.click(screen.getByRole('button', { name: 'app.newApp.Cancel' }))

web/app/components/workflow/nodes/trigger-schedule/components/__tests__/integration.spec.tsx

@@ -1,6 +1,6 @@
 /* eslint-disable ts/no-explicit-any */
 import type { ScheduleTriggerNodeType } from '../../types'
-import { fireEvent, render, screen, waitFor, within } from '@testing-library/react'
+import { render, screen, waitFor, within } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import FrequencySelector from '../frequency-selector'
 import ModeSwitcher from '../mode-switcher'
@@ -44,14 +44,14 @@ describe('trigger-schedule components', () => {
       )
 
       const trigger = screen.getByRole('button', { name: 'workflow.nodes.triggerSchedule.frequency.daily' })
-      fireEvent.click(trigger)
+      await user.click(trigger)
 
       await waitFor(() => {
         expect(trigger).toHaveAttribute('aria-expanded', 'true')
       })
 
       const listbox = await screen.findByRole('listbox')
-      await user.click(within(listbox).getByText('workflow.nodes.triggerSchedule.frequency.weekly'))
+      await user.click(within(listbox).getByRole('option', { name: 'workflow.nodes.triggerSchedule.frequency.weekly' }))
 
       await waitFor(() => {
         expect(onChange).toHaveBeenCalledWith('weekly')

web/app/components/workflow/panel/chat-variable-panel/components/__tests__/variable-modal.spec.tsx

@@ -150,7 +150,7 @@ describe('variable-modal', () => {
 
     await user.click(screen.getByText('workflow.chatVariable.modal.editInJSON'))
     await waitFor(() => {
-      expect(screen.getByText('Loading...')).toBeInTheDocument()
+      expect(screen.getByTestId('monaco-editor')).toBeInTheDocument()
     })
     await user.click(screen.getByText('workflow.chatVariable.modal.editInForm'))
     expect(screen.getByDisplayValue('enabled')).toBeInTheDocument()

web/docs/test.md

@@ -8,7 +8,7 @@ When I ask you to write/refactor/fix tests, follow these rules by default.
 
 - **Framework**: Next.js 15 + React 19 + TypeScript
 - **Testing Tools**: Vitest 4.0.16 + React Testing Library 16.0
-- **Test Environment**: jsdom
+- **Test Environment**: happy-dom
 - **File Naming**: `ComponentName.spec.tsx` inside a same-level `__tests__/` directory
 - **Placement Rule**: Component, hook, and utility tests must live in a sibling `__tests__/` folder at the same level as the source under test. For example, `foo/index.tsx` maps to `foo/__tests__/index.spec.tsx`, and `foo/bar.ts` maps to `foo/__tests__/bar.spec.ts`.
 
@@ -30,7 +30,7 @@ pnpm test path/to/file.spec.tsx
 
 ## Project Test Setup
 
-- **Configuration**: `vitest.config.ts` sets the `jsdom` environment, loads the Testing Library presets, and respects our path aliases (`@/...`). Check this file before adding new transformers or module name mappers.
+- **Configuration**: `vite.config.ts` sets the `happy-dom` environment, loads the Testing Library presets, and respects our path aliases (`@/...`). Check this file before adding new transformers or module name mappers.
 - **Global setup**: `vitest.setup.ts` already imports `@testing-library/jest-dom`, runs `cleanup()` after every test, and defines shared mocks (for example `react-i18next`). Add any environment-level mocks (for example `ResizeObserver`, `matchMedia`, `IntersectionObserver`, `TextEncoder`, `crypto`) here so they are shared consistently.
 - **Reusable mocks**: Place shared mock factories inside `web/__mocks__/` and use `vi.mock('module-name')` to point to them rather than redefining mocks in every spec.
 - **Mocking behavior**: Modules are not mocked automatically. Use `vi.mock(...)` in tests, or place global mocks in `vitest.setup.ts`.

web/package.json

@@ -220,11 +220,10 @@
     "eslint-plugin-react-refresh": "0.5.2",
     "eslint-plugin-sonarjs": "4.0.2",
     "eslint-plugin-storybook": "10.3.1",
+    "happy-dom": "20.8.8",
     "hono": "4.12.8",
     "husky": "9.1.7",
     "iconify-import-svg": "0.1.2",
-    "jsdom": "29.0.1",
-    "jsdom-testing-mocks": "1.16.0",
     "knip": "6.0.2",
     "lint-staged": "16.4.0",
     "postcss": "8.5.8",

web/plugins/dev-proxy/server.spec.ts

@@ -1,3 +1,6 @@
+/**
+ * @vitest-environment node
+ */
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { buildUpstreamUrl, createDevProxyApp, isAllowedDevOrigin, resolveDevProxyTargets } from './server'
 

web/pnpm-lock.yaml

@@ -371,7 +371,7 @@ importers:
     devDependencies:
       '@antfu/eslint-config':
         specifier: 7.7.3
-        version: 7.7.3(@eslint-react/eslint-plugin@3.0.0(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@next/eslint-plugin-next@16.2.1)(@typescript-eslint/rule-tester@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@typescript-eslint/typescript-estree@8.57.1(typescript@5.9.3))(@typescript-eslint/utils@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(@vue/compiler-sfc@3.5.30)(eslint-plugin-react-hooks@7.0.1(eslint@10.1.0(jiti@1.21.7)))(eslint-plugin-react-refresh@0.5.2(eslint@10.1.0(jiti@1.21.7)))(eslint@10.1.0(jiti@1.21.7))(oxlint@1.56.0(oxlint-tsgolint@0.17.1))(typescript@5.9.3)
+        version: 7.7.3(@eslint-react/eslint-plugin@3.0.0(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@next/eslint-plugin-next@16.2.1)(@typescript-eslint/rule-tester@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@typescript-eslint/typescript-estree@8.57.1(typescript@5.9.3))(@typescript-eslint/utils@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(@vue/compiler-sfc@3.5.30)(eslint-plugin-react-hooks@7.0.1(eslint@10.1.0(jiti@1.21.7)))(eslint-plugin-react-refresh@0.5.2(eslint@10.1.0(jiti@1.21.7)))(eslint@10.1.0(jiti@1.21.7))(oxlint@1.56.0(oxlint-tsgolint@0.17.1))(typescript@5.9.3)
       '@chromatic-com/storybook':
         specifier: 5.0.2
         version: 5.0.2(storybook@10.3.1(@testing-library/dom@10.4.1)(react-dom@19.2.4(react@19.2.4))(react@19.2.4))
@@ -506,7 +506,7 @@ importers:
         version: 0.5.21(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(react-dom@19.2.4(react@19.2.4))(react-server-dom-webpack@19.2.4(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(webpack@5.105.4(esbuild@0.27.2)(uglify-js@3.19.3)))(react@19.2.4)
       '@vitest/coverage-v8':
         specifier: 4.1.0
-        version: 4.1.0(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))
+        version: 4.1.0(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))
       agentation:
         specifier: 2.3.3
         version: 2.3.3(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
@@ -546,6 +546,9 @@ importers:
       eslint-plugin-storybook:
         specifier: 10.3.1
         version: 10.3.1(eslint@10.1.0(jiti@1.21.7))(storybook@10.3.1(@testing-library/dom@10.4.1)(react-dom@19.2.4(react@19.2.4))(react@19.2.4))(typescript@5.9.3)
+      happy-dom:
+        specifier: 20.8.8
+        version: 20.8.8
       hono:
         specifier: 4.12.8
         version: 4.12.8
@@ -555,12 +558,6 @@ importers:
       iconify-import-svg:
         specifier: 0.1.2
         version: 0.1.2
-      jsdom:
-        specifier: 29.0.1
-        version: 29.0.1(canvas@3.2.2)
-      jsdom-testing-mocks:
-        specifier: 1.16.0
-        version: 1.16.0
       knip:
         specifier: 6.0.2
         version: 6.0.2
@@ -608,13 +605,13 @@ importers:
         version: 11.3.3(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))
       vite-plus:
         specifier: 0.1.13
-        version: 0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)
+        version: 0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)
       vitest:
         specifier: npm:@voidzero-dev/vite-plus-test@0.1.13
-        version: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
+        version: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
       vitest-canvas-mock:
         specifier: 1.1.3
-        version: 1.1.3(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))
+        version: 1.1.3(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))
 
 packages:
 
@@ -3510,6 +3507,12 @@ packages:
   '@types/unist@3.0.3':
     resolution: {integrity: sha512-ko/gIFJRv177XgZsZcBwnqJN5x/Gien8qNOn0D5bQU/zAzVf9Zt3BlcUiLqhV9y4ARk0GbT3tnUiPNgnTXzc/Q==}
 
+  '@types/whatwg-mimetype@3.0.2':
+    resolution: {integrity: sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==}
+
+  '@types/ws@8.18.1':
+    resolution: {integrity: sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==}
+
   '@types/yauzl@2.10.3':
     resolution: {integrity: sha512-oJoftv0LSuaDZE3Le4DbKX+KS9G36NzOeSap90UIK0yMA/NhKJhqlSGtNDORNRaIbQfzjXDrQa0ytJ6mNRGz/Q==}
 
@@ -4082,9 +4085,6 @@ packages:
     engines: {node: '>=6.0.0'}
     hasBin: true
 
-  bezier-easing@2.1.0:
-    resolution: {integrity: sha512-gbIqZ/eslnUFC1tjEvtz0sgx+xTK20wDnYMIA27VA04R7w6xxXQPZDbibjA9DTWZRA2CXtwHykkVzlCaAJAZig==}
-
   bidi-js@1.0.3:
     resolution: {integrity: sha512-RKshQI1R3YQ+n9YJz2QQ147P66ELpa1FQEg20Dk8oW9t2KgLbpDLLp9aGZ7y8WHSshDknG0bknqGw5/tyCs5tw==}
 
@@ -4385,9 +4385,6 @@ packages:
     resolution: {integrity: sha512-3O5QdqgFRUbXvK1x5INf1YkBz1UKSWqrd63vWsum8MNHDBYD5urm3QtxZbKU259OrEXNM26lP/MPY3d1IGkBgA==}
     engines: {node: '>=16'}
 
-  css-mediaquery@0.1.2:
-    resolution: {integrity: sha512-COtn4EROW5dBGlE/4PiKnh6rZpAPxDeFLaEEwt4i10jpDMFt2EhQGS79QmmrO+iKCHv0PU/HrOWEhijFd1x99Q==}
-
   css-select@5.2.2:
     resolution: {integrity: sha512-TizTzUddG/xYLA3NXodFM0fSbNizXjOKhqiQQwvhlspadZokn1KDy0NZFS0wuEubIYAV5/c1/lAr0TaaFXEXzw==}
 
@@ -5359,6 +5356,10 @@ packages:
   hachure-fill@0.5.2:
     resolution: {integrity: sha512-3GKBOn+m2LX9iq+JC1064cSFprJY4jL1jCXTcpnfER5HYE2l/4EfWSGzkPa/ZDBmYI0ZOEj5VHV/eKnPGkHuOg==}
 
+  happy-dom@20.8.8:
+    resolution: {integrity: sha512-5/F8wxkNxYtsN0bXfMwIyNLZ9WYsoOYPbmoluqVJqv8KBUbcyKZawJ7uYK4WTX8IHBLYv+VXIwfeNDPy1oKMwQ==}
+    engines: {node: '>=20.0.0'}
+
   has-flag@4.0.0:
     resolution: {integrity: sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==}
     engines: {node: '>=8'}
@@ -5690,10 +5691,6 @@ packages:
     resolution: {integrity: sha512-/2uqY7x6bsrpi3i9LVU6J89352C0rpMk0as8trXxCtvd4kPk1ke/Eyif6wqfSLvoNJqcDG9Vk4UsXgygzCt2xA==}
     engines: {node: '>=20.0.0'}
 
-  jsdom-testing-mocks@1.16.0:
-    resolution: {integrity: sha512-wLrulXiLpjmcUYOYGEvz4XARkrmdVpyxzdBl9IAMbQ+ib2/UhUTRCn49McdNfXLff2ysGBUms49ZKX0LR1Q0gg==}
-    engines: {node: '>=14'}
-
   jsdom@29.0.1:
     resolution: {integrity: sha512-z6JOK5gRO7aMybVq/y/MlIpKh8JIi68FBKMUtKkK2KH/wMSRlCxQ682d08LB9fYXplyY/UXG8P4XXTScmdjApg==}
     engines: {node: ^20.19.0 || ^22.13.0 || >=24.0.0}
@@ -7841,6 +7838,10 @@ packages:
     engines: {node: '>=18'}
     deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
+  whatwg-mimetype@3.0.0:
+    resolution: {integrity: sha512-nt+N2dzIutVRxARx1nghPKGv1xHikU7HKdfafKkLNLindmPU/ch3U31NOCGGA/dmPcmb1VlofO0vnKAcsm0o/Q==}
+    engines: {node: '>=12'}
+
   whatwg-mimetype@4.0.0:
     resolution: {integrity: sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==}
     engines: {node: '>=18'}
@@ -8140,7 +8141,7 @@ snapshots:
       idb: 8.0.0
       tslib: 2.8.1
 
-  '@antfu/eslint-config@7.7.3(@eslint-react/eslint-plugin@3.0.0(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@next/eslint-plugin-next@16.2.1)(@typescript-eslint/rule-tester@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@typescript-eslint/typescript-estree@8.57.1(typescript@5.9.3))(@typescript-eslint/utils@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(@vue/compiler-sfc@3.5.30)(eslint-plugin-react-hooks@7.0.1(eslint@10.1.0(jiti@1.21.7)))(eslint-plugin-react-refresh@0.5.2(eslint@10.1.0(jiti@1.21.7)))(eslint@10.1.0(jiti@1.21.7))(oxlint@1.56.0(oxlint-tsgolint@0.17.1))(typescript@5.9.3)':
+  '@antfu/eslint-config@7.7.3(@eslint-react/eslint-plugin@3.0.0(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@next/eslint-plugin-next@16.2.1)(@typescript-eslint/rule-tester@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@typescript-eslint/typescript-estree@8.57.1(typescript@5.9.3))(@typescript-eslint/utils@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(@vue/compiler-sfc@3.5.30)(eslint-plugin-react-hooks@7.0.1(eslint@10.1.0(jiti@1.21.7)))(eslint-plugin-react-refresh@0.5.2(eslint@10.1.0(jiti@1.21.7)))(eslint@10.1.0(jiti@1.21.7))(oxlint@1.56.0(oxlint-tsgolint@0.17.1))(typescript@5.9.3)':
     dependencies:
       '@antfu/install-pkg': 1.1.0
       '@clack/prompts': 1.1.0
@@ -8150,7 +8151,7 @@ snapshots:
       '@stylistic/eslint-plugin': 5.10.0(eslint@10.1.0(jiti@1.21.7))
       '@typescript-eslint/eslint-plugin': 8.57.1(@typescript-eslint/parser@8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3))(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)
       '@typescript-eslint/parser': 8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)
-      '@vitest/eslint-plugin': 1.6.12(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)
+      '@vitest/eslint-plugin': 1.6.12(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)
       ansis: 4.2.0
       cac: 7.0.0
       eslint: 10.1.0(jiti@1.21.7)
@@ -8217,6 +8218,7 @@ snapshots:
       '@csstools/css-parser-algorithms': 4.0.0(@csstools/css-tokenizer@4.0.0)
       '@csstools/css-tokenizer': 4.0.0
       lru-cache: 11.2.7
+    optional: true
 
   '@asamuzakjp/dom-selector@7.0.3':
     dependencies:
@@ -8225,8 +8227,10 @@ snapshots:
       css-tree: 3.2.1
       is-potential-custom-element-name: 1.0.1
       lru-cache: 11.2.7
+    optional: true
 
-  '@asamuzakjp/nwsapi@2.3.9': {}
+  '@asamuzakjp/nwsapi@2.3.9':
+    optional: true
 
   '@babel/code-frame@7.29.0':
     dependencies:
@@ -8361,6 +8365,7 @@ snapshots:
   '@bramus/specificity@2.4.2':
     dependencies:
       css-tree: 3.2.1
+    optional: true
 
   '@chevrotain/cst-dts-gen@11.1.2':
     dependencies:
@@ -8453,12 +8458,14 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@csstools/color-helpers@6.0.2': {}
+  '@csstools/color-helpers@6.0.2':
+    optional: true
 
   '@csstools/css-calc@3.1.1(@csstools/css-parser-algorithms@4.0.0(@csstools/css-tokenizer@4.0.0))(@csstools/css-tokenizer@4.0.0)':
     dependencies:
       '@csstools/css-parser-algorithms': 4.0.0(@csstools/css-tokenizer@4.0.0)
       '@csstools/css-tokenizer': 4.0.0
+    optional: true
 
   '@csstools/css-color-parser@4.0.2(@csstools/css-parser-algorithms@4.0.0(@csstools/css-tokenizer@4.0.0))(@csstools/css-tokenizer@4.0.0)':
     dependencies:
@@ -8466,16 +8473,20 @@ snapshots:
       '@csstools/css-calc': 3.1.1(@csstools/css-parser-algorithms@4.0.0(@csstools/css-tokenizer@4.0.0))(@csstools/css-tokenizer@4.0.0)
       '@csstools/css-parser-algorithms': 4.0.0(@csstools/css-tokenizer@4.0.0)
       '@csstools/css-tokenizer': 4.0.0
+    optional: true
 
   '@csstools/css-parser-algorithms@4.0.0(@csstools/css-tokenizer@4.0.0)':
     dependencies:
       '@csstools/css-tokenizer': 4.0.0
+    optional: true
 
   '@csstools/css-syntax-patches-for-csstree@1.1.1(css-tree@3.2.1)':
     optionalDependencies:
       css-tree: 3.2.1
+    optional: true
 
-  '@csstools/css-tokenizer@4.0.0': {}
+  '@csstools/css-tokenizer@4.0.0':
+    optional: true
 
   '@e18e/eslint-plugin@0.2.0(eslint@10.1.0(jiti@1.21.7))(oxlint@1.56.0(oxlint-tsgolint@0.17.1))':
     dependencies:
@@ -8777,7 +8788,8 @@ snapshots:
       '@eslint/core': 1.1.1
       levn: 0.4.1
 
-  '@exodus/bytes@1.15.0': {}
+  '@exodus/bytes@1.15.0':
+    optional: true
 
   '@floating-ui/core@1.7.5':
     dependencies:
@@ -10814,6 +10826,12 @@ snapshots:
 
   '@types/unist@3.0.3': {}
 
+  '@types/whatwg-mimetype@3.0.2': {}
+
+  '@types/ws@8.18.1':
+    dependencies:
+      '@types/node': 25.5.0
+
   '@types/yauzl@2.10.3':
     dependencies:
       '@types/node': 25.5.0
@@ -11019,7 +11037,7 @@ snapshots:
     optionalDependencies:
       react-server-dom-webpack: 19.2.4(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(webpack@5.105.4(esbuild@0.27.2)(uglify-js@3.19.3))
 
-  '@vitest/coverage-v8@4.1.0(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))':
+  '@vitest/coverage-v8@4.1.0(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))':
     dependencies:
       '@bcoe/v8-coverage': 1.0.2
       '@vitest/utils': 4.1.0
@@ -11031,16 +11049,16 @@ snapshots:
       obug: 2.1.1
       std-env: 4.0.0
       tinyrainbow: 3.1.0
-      vitest: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
+      vitest: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
 
-  '@vitest/eslint-plugin@1.6.12(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)':
+  '@vitest/eslint-plugin@1.6.12(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)':
     dependencies:
       '@typescript-eslint/scope-manager': 8.57.1
       '@typescript-eslint/utils': 8.57.1(eslint@10.1.0(jiti@1.21.7))(typescript@5.9.3)
       eslint: 10.1.0(jiti@1.21.7)
     optionalDependencies:
       typescript: 5.9.3
-      vitest: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
+      vitest: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
     transitivePeerDependencies:
       - supports-color
 
@@ -11105,7 +11123,7 @@ snapshots:
   '@voidzero-dev/vite-plus-linux-x64-gnu@0.1.13':
     optional: true
 
-  '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)':
+  '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)':
     dependencies:
       '@standard-schema/spec': 1.1.0
       '@types/chai': 5.2.3
@@ -11123,6 +11141,7 @@ snapshots:
       ws: 8.19.0
     optionalDependencies:
       '@types/node': 25.5.0
+      happy-dom: 20.8.8
       jsdom: 29.0.1(canvas@3.2.2)
     transitivePeerDependencies:
       - '@arethetypeswrong/core'
@@ -11419,11 +11438,10 @@ snapshots:
 
   baseline-browser-mapping@2.10.8: {}
 
-  bezier-easing@2.1.0: {}
-
   bidi-js@1.0.3:
     dependencies:
       require-from-string: 2.0.2
+    optional: true
 
   binary-extensions@2.3.0: {}
 
@@ -11715,8 +11733,6 @@ snapshots:
 
   css-gradient-parser@0.0.16: {}
 
-  css-mediaquery@0.1.2: {}
-
   css-select@5.2.2:
     dependencies:
       boolbase: 1.0.0
@@ -11745,6 +11761,7 @@ snapshots:
     dependencies:
       mdn-data: 2.27.1
       source-map-js: 1.2.1
+    optional: true
 
   css-what@6.2.2: {}
 
@@ -11950,6 +11967,7 @@ snapshots:
       whatwg-url: 16.0.1
     transitivePeerDependencies:
       - '@noble/hashes'
+    optional: true
 
   dayjs@1.11.20: {}
 
@@ -12897,6 +12915,18 @@ snapshots:
 
   hachure-fill@0.5.2: {}
 
+  happy-dom@20.8.8:
+    dependencies:
+      '@types/node': 25.5.0
+      '@types/whatwg-mimetype': 3.0.2
+      '@types/ws': 8.18.1
+      entities: 7.0.1
+      whatwg-mimetype: 3.0.0
+      ws: 8.19.0
+    transitivePeerDependencies:
+      - bufferutil
+      - utf-8-validate
+
   has-flag@4.0.0: {}
 
   hast-util-from-dom@5.0.1:
@@ -13061,6 +13091,7 @@ snapshots:
       '@exodus/bytes': 1.15.0
     transitivePeerDependencies:
       - '@noble/hashes'
+    optional: true
 
   html-entities@2.6.0: {}
 
@@ -13199,7 +13230,8 @@ snapshots:
 
   is-plain-obj@4.1.0: {}
 
-  is-potential-custom-element-name@1.0.1: {}
+  is-potential-custom-element-name@1.0.1:
+    optional: true
 
   is-reference@3.0.3:
     dependencies:
@@ -13261,11 +13293,6 @@ snapshots:
 
   jsdoc-type-pratt-parser@7.1.1: {}
 
-  jsdom-testing-mocks@1.16.0:
-    dependencies:
-      bezier-easing: 2.1.0
-      css-mediaquery: 0.1.2
-
   jsdom@29.0.1(canvas@3.2.2):
     dependencies:
       '@asamuzakjp/css-color': 5.0.1
@@ -13293,6 +13320,7 @@ snapshots:
       canvas: 3.2.2
     transitivePeerDependencies:
       - '@noble/hashes'
+    optional: true
 
   jsesc@3.1.0: {}
 
@@ -13753,7 +13781,8 @@ snapshots:
 
   mdn-data@2.23.0: {}
 
-  mdn-data@2.27.1: {}
+  mdn-data@2.27.1:
+    optional: true
 
   memoize-one@5.2.1: {}
 
@@ -15121,6 +15150,7 @@ snapshots:
   saxes@6.0.0:
     dependencies:
       xmlchars: 2.2.0
+    optional: true
 
   scheduler@0.27.0: {}
 
@@ -15397,7 +15427,8 @@ snapshots:
       picocolors: 1.1.1
       sax: 1.6.0
 
-  symbol-tree@3.2.4: {}
+  symbol-tree@3.2.4:
+    optional: true
 
   synckit@0.11.12:
     dependencies:
@@ -15559,10 +15590,12 @@ snapshots:
   tough-cookie@6.0.1:
     dependencies:
       tldts: 7.0.27
+    optional: true
 
   tr46@6.0.0:
     dependencies:
       punycode: 2.3.1
+    optional: true
 
   trim-lines@3.0.1: {}
 
@@ -15655,7 +15688,8 @@ snapshots:
 
   undici@7.24.0: {}
 
-  undici@7.24.5: {}
+  undici@7.24.5:
+    optional: true
 
   unicode-trie@2.0.0:
     dependencies:
@@ -15879,11 +15913,11 @@ snapshots:
       - supports-color
       - typescript
 
-  vite-plus@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3):
+  vite-plus@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3):
     dependencies:
       '@oxc-project/types': 0.120.0
       '@voidzero-dev/vite-plus-core': 0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)
-      '@voidzero-dev/vite-plus-test': 0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)
+      '@voidzero-dev/vite-plus-test': 0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)
       cac: 7.0.0
       cross-spawn: 7.0.6
       oxfmt: 0.41.0
@@ -15950,11 +15984,11 @@ snapshots:
     optionalDependencies:
       vite: '@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
 
-  vitest-canvas-mock@1.1.3(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)):
+  vitest-canvas-mock@1.1.3(@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)):
     dependencies:
       cssfontparser: 1.2.1
       moo-color: 1.0.3
-      vitest: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
+      vitest: '@voidzero-dev/vite-plus-test@0.1.13(@types/node@25.5.0)(@voidzero-dev/vite-plus-core@0.1.13(@types/node@25.5.0)(esbuild@0.27.2)(jiti@1.21.7)(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3))(esbuild@0.27.2)(happy-dom@20.8.8)(jiti@1.21.7)(jsdom@29.0.1(canvas@3.2.2))(sass@1.98.0)(terser@5.46.1)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.3)'
 
   void-elements@3.1.0: {}
 
@@ -15990,6 +16024,7 @@ snapshots:
   w3c-xmlserializer@5.0.0:
     dependencies:
       xml-name-validator: 5.0.0
+    optional: true
 
   walk-up-path@4.0.0: {}
 
@@ -16002,7 +16037,8 @@ snapshots:
 
   web-vitals@5.1.0: {}
 
-  webidl-conversions@8.0.1: {}
+  webidl-conversions@8.0.1:
+    optional: true
 
   webpack-sources@3.3.4: {}
 
@@ -16044,9 +16080,12 @@ snapshots:
     dependencies:
       iconv-lite: 0.6.3
 
+  whatwg-mimetype@3.0.0: {}
+
   whatwg-mimetype@4.0.0: {}
 
-  whatwg-mimetype@5.0.0: {}
+  whatwg-mimetype@5.0.0:
+    optional: true
 
   whatwg-url@16.0.1:
     dependencies:
@@ -16055,6 +16094,7 @@ snapshots:
       webidl-conversions: 8.0.1
     transitivePeerDependencies:
       - '@noble/hashes'
+    optional: true
 
   which@2.0.2:
     dependencies:
@@ -16078,9 +16118,11 @@ snapshots:
 
   xml-name-validator@4.0.0: {}
 
-  xml-name-validator@5.0.0: {}
+  xml-name-validator@5.0.0:
+    optional: true
 
-  xmlchars@2.2.0: {}
+  xmlchars@2.2.0:
+    optional: true
 
   xtend@4.0.2: {}
 

web/vite.config.ts

@@ -75,7 +75,8 @@ export default defineConfig(({ mode }) => {
 
     // Vitest config
     test: {
-      environment: 'jsdom',
+      pool: 'threads',
+      environment: 'happy-dom',
       globals: true,
       setupFiles: ['./vitest.setup.ts'],
       coverage: {

web/vitest.setup.ts

@@ -1,14 +1,8 @@
 import { act, cleanup } from '@testing-library/react'
-import { mockAnimationsApi, mockResizeObserver } from 'jsdom-testing-mocks'
 import * as React from 'react'
 import '@testing-library/jest-dom/vitest'
 import 'vitest-canvas-mock'
 
-mockResizeObserver()
-
-// Mock Web Animations API for Headless UI
-mockAnimationsApi()
-
 // Suppress act() warnings from @headlessui/react internal Transition component
 // These warnings are caused by Headless UI's internal async state updates, not our code
 const originalConsoleError = console.error
@@ -77,24 +71,10 @@ if (typeof globalThis.IntersectionObserver === 'undefined') {
   }
 }
 
-// Mock Element.scrollIntoView for tests (not available in happy-dom/jsdom)
-if (typeof Element !== 'undefined' && !Element.prototype.scrollIntoView)
-  Element.prototype.scrollIntoView = function () { /* noop */ }
-
-// Mock DOMRect.fromRect for tests (not available in jsdom)
-if (typeof DOMRect !== 'undefined' && typeof (DOMRect as typeof DOMRect & { fromRect?: unknown }).fromRect !== 'function') {
-  (DOMRect as typeof DOMRect & { fromRect: (rect?: DOMRectInit) => DOMRect }).fromRect = (rect = {}) => new DOMRect(
-    rect.x ?? 0,
-    rect.y ?? 0,
-    rect.width ?? 0,
-    rect.height ?? 0,
-  )
-}
-
 afterEach(async () => {
   // Wrap cleanup in act() to flush pending React scheduler work
   // This prevents "window is not defined" errors from React 19's scheduler
-  // which uses setImmediate/MessageChannel that can fire after jsdom cleanup
+  // which uses setImmediate/MessageChannel that can fire after DOM cleanup
   await act(async () => {
     cleanup()
   })
@@ -131,19 +111,97 @@ vi.mock('@floating-ui/react', async () => {
   }
 })
 
-// mock window.matchMedia
+vi.mock('@monaco-editor/react', () => {
-Object.defineProperty(window, 'matchMedia', {
+  const createEditorMock = () => {
-  writable: true,
+    const focusListeners: Array<() => void> = []
-  value: vi.fn().mockImplementation(query => ({
+    const blurListeners: Array<() => void> = []
-    matches: false,
+
-    media: query,
+    return {
-    onchange: null,
+      getContentHeight: vi.fn(() => 56),
-    addListener: vi.fn(), // deprecated
+      onDidFocusEditorText: vi.fn((listener: () => void) => {
-    removeListener: vi.fn(), // deprecated
+        focusListeners.push(listener)
-    addEventListener: vi.fn(),
+        return { dispose: vi.fn() }
-    removeEventListener: vi.fn(),
+      }),
-    dispatchEvent: vi.fn(),
+      onDidBlurEditorText: vi.fn((listener: () => void) => {
-  })),
+        blurListeners.push(listener)
+        return { dispose: vi.fn() }
+      }),
+      layout: vi.fn(),
+      getAction: vi.fn(() => ({ run: vi.fn() })),
+      getModel: vi.fn(() => ({
+        getLineContent: vi.fn(() => ''),
+      })),
+      getPosition: vi.fn(() => ({ lineNumber: 1, column: 1 })),
+      deltaDecorations: vi.fn(() => []),
+      focus: vi.fn(() => {
+        focusListeners.forEach(listener => listener())
+      }),
+      setPosition: vi.fn(),
+      revealLine: vi.fn(),
+      trigger: vi.fn(),
+      __blur: () => {
+        blurListeners.forEach(listener => listener())
+      },
+    }
+  }
+
+  const monacoMock = {
+    editor: {
+      setTheme: vi.fn(),
+      defineTheme: vi.fn(),
+    },
+    Range: class {
+      startLineNumber: number
+      startColumn: number
+      endLineNumber: number
+      endColumn: number
+      constructor(startLineNumber: number, startColumn: number, endLineNumber: number, endColumn: number) {
+        this.startLineNumber = startLineNumber
+        this.startColumn = startColumn
+        this.endLineNumber = endLineNumber
+        this.endColumn = endColumn
+      }
+    },
+  }
+
+  const MonacoEditor = ({
+    value = '',
+    onChange,
+    onMount,
+    options,
+  }: {
+    value?: string
+    onChange?: (value: string | undefined) => void
+    onMount?: (editor: ReturnType<typeof createEditorMock>, monaco: typeof monacoMock) => void
+    options?: { readOnly?: boolean }
+  }) => {
+    const editorRef = React.useRef<ReturnType<typeof createEditorMock> | null>(null)
+    if (!editorRef.current)
+      editorRef.current = createEditorMock()
+
+    React.useEffect(() => {
+      onMount?.(editorRef.current!, monacoMock)
+    }, [onMount])
+
+    return React.createElement('textarea', {
+      'data-testid': 'monaco-editor',
+      'readOnly': options?.readOnly,
+      value,
+      'onChange': (event: React.ChangeEvent<HTMLTextAreaElement>) => onChange?.(event.target.value),
+      'onFocus': () => editorRef.current?.focus(),
+      'onBlur': () => editorRef.current?.__blur(),
+    })
+  }
+
+  return {
+    __esModule: true,
+    default: MonacoEditor,
+    Editor: MonacoEditor,
+    loader: {
+      config: vi.fn(),
+      init: vi.fn().mockResolvedValue(monacoMock),
+    },
+  }
 })
 
 // Mock localStorage for testing