test: consolidate coverage suites and clean up superseded test scaffolding

Fold sibling suites back into their canonical files (app.test.ts,
litegraphService.test.ts), replace module-level global.fetch/global.URL
mocks with vi.stubGlobal, apply helper refactors (avif/gltf box
builders, searchAndReplace createGraph, treeUtil createNode hoist), and
drop tests superseded by rewritten variants.

apps/website/src/components/customers/ArticleNav.vue

@@ -15,7 +15,7 @@ const { categories } = defineProps<{
 
 const activeSection = ref(categories[0]?.value ?? '')
 
-const HEADER_OFFSET = -144
+const HEADER_OFFSET_PX = -144
 const BOTTOM_THRESHOLD_PX = 4
 const SCROLL_SAFETY_MS = 1500
 
@@ -52,7 +52,7 @@ function scrollToSection(id: string) {
   const el = document.getElementById(id)
   if (el) {
     scrollTo(el, {
-      offset: HEADER_OFFSET,
+      offset: HEADER_OFFSET_PX,
       duration: 0.8,
       immediate: prefersReducedMotion(),
       onComplete: clearScrollLock

apps/website/src/components/customers/content/ListItem.astro

@@ -1,5 +1,5 @@
 <li
-  class="flex items-start gap-2 text-primary-comfy-canvas before:mt-1.5 before:size-1.5 before:shrink-0 before:rounded-full before:bg-primary-comfy-yellow before:content-['']"
+  class="flex items-start gap-2 text-primary-comfy-canvas before:mt-1.5 before:size-1.5 before:shrink-0 before:rounded-full before:bg-primary-comfy-yellow"
 >
   <slot />
 </li>

browser_tests/assets/linear-validation-warning.json

@@ -0,0 +1,45 @@
+{
+  "last_node_id": 9,
+  "last_link_id": 9,
+  "nodes": [
+    {
+      "id": 9,
+      "type": "SaveImage",
+      "pos": {
+        "0": 64,
+        "1": 104
+      },
+      "size": {
+        "0": 210,
+        "1": 58
+      },
+      "flags": {},
+      "order": 0,
+      "mode": 0,
+      "inputs": [
+        {
+          "name": "images",
+          "type": "IMAGE",
+          "link": null
+        }
+      ],
+      "outputs": [],
+      "properties": {},
+      "widgets_values": ["ComfyUI"]
+    }
+  ],
+  "links": [],
+  "groups": [],
+  "config": {},
+  "extra": {
+    "ds": {
+      "scale": 1,
+      "offset": [0, 0]
+    },
+    "linearData": {
+      "inputs": [],
+      "outputs": ["9"]
+    }
+  },
+  "version": 0.4
+}

browser_tests/fixtures/helpers/AppModeHelper.ts

@@ -34,6 +34,10 @@ export class AppModeHelper {
   public readonly outputPlaceholder: Locator
   /** The linear-mode widget list container (visible in app mode). */
   public readonly linearWidgets: Locator
+  /** The validation warning shown above the app mode run button. */
+  public readonly validationWarning: Locator
+  /** The action that opens graph mode errors from the validation warning. */
+  public readonly viewErrorsInGraphButton: Locator
   /** The PrimeVue Popover for the image picker (renders with role="dialog"). */
   public readonly imagePickerPopover: Locator
   /** The Run button in the app mode footer. */
@@ -92,13 +96,19 @@ export class AppModeHelper {
     this.outputPlaceholder = this.page.getByTestId(
       TestIds.builder.outputPlaceholder
     )
-    this.linearWidgets = this.page.getByTestId('linear-widgets')
+    this.linearWidgets = this.page.getByTestId(TestIds.linear.widgetContainer)
+    this.validationWarning = this.page.getByTestId(
+      TestIds.linear.validationWarning
+    )
+    this.viewErrorsInGraphButton = this.validationWarning.getByTestId(
+      TestIds.linear.viewErrorsInGraph
+    )
     this.imagePickerPopover = this.page
       .getByRole('dialog')
       .filter({ has: this.page.getByRole('button', { name: 'All' }) })
       .first()
     this.runButton = this.page
-      .getByTestId('linear-run-button')
+      .getByTestId(TestIds.linear.runButton)
       .getByRole('button', { name: /run/i })
     this.welcome = this.page.getByTestId(TestIds.appMode.welcome)
     this.emptyWorkflowText = this.page.getByTestId(

browser_tests/fixtures/selectors.ts

@@ -172,6 +172,9 @@ export const TestIds = {
     mobileNavigation: 'linear-mobile-navigation',
     mobileWorkflows: 'linear-mobile-workflows',
     outputInfo: 'linear-output-info',
+    runButton: 'linear-run-button',
+    validationWarning: 'linear-validation-warning',
+    viewErrorsInGraph: 'linear-view-errors',
     widgetContainer: 'linear-widgets'
   },
   builder: {

browser_tests/tests/appModeValidationWarning.spec.ts

@@ -0,0 +1,106 @@
+import {
+  comfyExpect as expect,
+  comfyPageFixture as test
+} from '@e2e/fixtures/ComfyPage'
+import type { NodeError, PromptResponse } from '@/schemas/apiSchema'
+import { ExecutionHelper } from '@e2e/fixtures/helpers/ExecutionHelper'
+import { enableErrorsOverlay } from '@e2e/fixtures/helpers/ErrorsTabHelper'
+import { TestIds } from '@e2e/fixtures/selectors'
+
+const SAVE_IMAGE_NODE_ID = '9'
+
+function buildSaveImageRequiredInputError(): NodeError {
+  return {
+    class_type: 'SaveImage',
+    dependent_outputs: [],
+    errors: [
+      {
+        type: 'required_input_missing',
+        message: 'Required input is missing: images',
+        details: '',
+        extra_info: { input_name: 'images' }
+      }
+    ]
+  }
+}
+
+test.describe(
+  'App mode validation warning',
+  { tag: ['@ui', '@workflow'] },
+  () => {
+    test.beforeEach(async ({ comfyPage }) => {
+      await enableErrorsOverlay(comfyPage)
+      await comfyPage.workflow.loadWorkflow('linear-validation-warning')
+      await comfyPage.appMode.toggleAppMode()
+      await expect(comfyPage.appMode.linearWidgets).toBeVisible()
+    })
+
+    test('opens graph errors from the app mode validation warning', async ({
+      comfyPage
+    }) => {
+      await expect(comfyPage.appMode.validationWarning).toBeHidden()
+
+      const exec = new ExecutionHelper(comfyPage)
+      await exec.mockValidationFailure({
+        [SAVE_IMAGE_NODE_ID]: buildSaveImageRequiredInputError()
+      })
+
+      await comfyPage.appMode.runButton.click()
+      const appModeOverlay = comfyPage.appMode.centerPanel.getByTestId(
+        TestIds.dialogs.errorOverlay
+      )
+      await expect(appModeOverlay).toBeHidden()
+
+      await expect(comfyPage.appMode.validationWarning).toBeVisible()
+      await expect(comfyPage.appMode.validationWarning).toContainText(
+        /Required input missing/i
+      )
+      await expect(comfyPage.appMode.viewErrorsInGraphButton).toBeVisible()
+
+      await comfyPage.appMode.viewErrorsInGraphButton.click()
+
+      await expect(comfyPage.appMode.linearWidgets).toBeHidden()
+      await expect(
+        comfyPage.page.getByTestId(TestIds.propertiesPanel.root)
+      ).toBeVisible()
+      await expect(
+        comfyPage.page.getByTestId(TestIds.propertiesPanel.errorsTab)
+      ).toBeVisible()
+    })
+
+    test('keeps the app mode run button enabled when the warning is visible', async ({
+      comfyPage
+    }) => {
+      const exec = new ExecutionHelper(comfyPage)
+      await exec.mockValidationFailure({
+        [SAVE_IMAGE_NODE_ID]: buildSaveImageRequiredInputError()
+      })
+
+      await comfyPage.appMode.runButton.click()
+      await expect(comfyPage.appMode.validationWarning).toBeVisible()
+      await expect(comfyPage.appMode.runButton).toBeEnabled()
+
+      let promptQueued = false
+      const mockResponse: PromptResponse = {
+        prompt_id: 'test-id',
+        node_errors: {},
+        error: ''
+      }
+      await comfyPage.page.route(
+        '**/api/prompt',
+        async (route) => {
+          promptQueued = true
+          await route.fulfill({
+            status: 200,
+            body: JSON.stringify(mockResponse)
+          })
+        },
+        { times: 1 }
+      )
+
+      await comfyPage.appMode.runButton.click()
+
+      await expect.poll(() => promptQueued).toBe(true)
+    })
+  }
+)

browser_tests/tests/graph.spec.ts

@@ -1,5 +1,6 @@
 import { expect } from '@playwright/test'
 
+import { toLinkId } from '@/types/linkId'
 import { toNodeId } from '@/types/nodeId'
 
 import { comfyPageFixture as test } from '@e2e/fixtures/ComfyPage'
@@ -15,9 +16,10 @@ test.describe('Graph', { tag: ['@smoke', '@canvas'] }, () => {
     await comfyPage.workflow.loadWorkflow('inputs/input_order_swap')
     await expect
       .poll(() =>
-        comfyPage.page.evaluate(() => {
-          return window.app!.graph!.links.get(1)?.target_slot
-        })
+        comfyPage.page.evaluate(
+          (linkId) => window.app!.graph!.links.get(linkId)?.target_slot,
+          toLinkId(1)
+        )
       )
       .toBe(1)
   })

browser_tests/tests/linearMode.spec.ts

@@ -3,6 +3,7 @@ import {
   comfyPageFixture as test,
   comfyExpect as expect
 } from '@e2e/fixtures/ComfyPage'
+import { TestIds } from '@e2e/fixtures/selectors'
 
 test.describe('Linear Mode', { tag: '@ui' }, () => {
   test('Displays linear controls when app mode active', async ({
@@ -16,7 +17,9 @@ test.describe('Linear Mode', { tag: '@ui' }, () => {
   test('Run button visible in linear mode', async ({ comfyPage }) => {
     await comfyPage.appMode.enterAppModeWithInputs([])
 
-    await expect(comfyPage.page.getByTestId('linear-run-button')).toBeVisible()
+    await expect(
+      comfyPage.page.getByTestId(TestIds.linear.runButton)
+    ).toBeVisible()
   })
 
   test('Workflow info section visible', async ({ comfyPage }) => {

src/base/common/async.test.ts

@@ -0,0 +1,75 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+describe('runWhenGlobalIdle', () => {
+  beforeEach(() => {
+    vi.resetModules()
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+    vi.unstubAllGlobals()
+  })
+
+  it('falls back to a timeout when idle callbacks are unavailable', async () => {
+    vi.useFakeTimers()
+    vi.stubGlobal('requestIdleCallback', undefined)
+    vi.stubGlobal('cancelIdleCallback', undefined)
+    const { runWhenGlobalIdle } = await import('./async')
+    const runner = vi.fn()
+
+    const disposable = runWhenGlobalIdle(runner)
+    await vi.runAllTimersAsync()
+
+    expect(runner).toHaveBeenCalledOnce()
+    const deadline = runner.mock.calls[0][0]
+    expect(deadline.didTimeout).toBe(true)
+    expect(deadline.timeRemaining()).toBeGreaterThanOrEqual(0)
+
+    disposable.dispose()
+    disposable.dispose()
+  })
+
+  it('cancels fallback idle work before it runs', async () => {
+    vi.useFakeTimers()
+    vi.stubGlobal('requestIdleCallback', undefined)
+    vi.stubGlobal('cancelIdleCallback', undefined)
+    const { runWhenGlobalIdle } = await import('./async')
+    const runner = vi.fn()
+
+    runWhenGlobalIdle(runner).dispose()
+    await vi.runAllTimersAsync()
+
+    expect(runner).not.toHaveBeenCalled()
+  })
+
+  it('uses native idle callbacks when available', async () => {
+    const requestIdleCallback = vi.fn(() => 42)
+    const cancelIdleCallback = vi.fn()
+    vi.stubGlobal('requestIdleCallback', requestIdleCallback)
+    vi.stubGlobal('cancelIdleCallback', cancelIdleCallback)
+    const { runWhenGlobalIdle } = await import('./async')
+    const runner = vi.fn()
+
+    const disposable = runWhenGlobalIdle(runner, 250)
+
+    expect(requestIdleCallback).toHaveBeenCalledWith(runner, { timeout: 250 })
+
+    disposable.dispose()
+    disposable.dispose()
+
+    expect(cancelIdleCallback).toHaveBeenCalledOnce()
+    expect(cancelIdleCallback).toHaveBeenCalledWith(42)
+  })
+
+  it('omits native idle timeout options when no timeout is supplied', async () => {
+    const requestIdleCallback = vi.fn(() => 7)
+    vi.stubGlobal('requestIdleCallback', requestIdleCallback)
+    vi.stubGlobal('cancelIdleCallback', vi.fn())
+    const { runWhenGlobalIdle } = await import('./async')
+    const runner = vi.fn()
+
+    runWhenGlobalIdle(runner)
+
+    expect(requestIdleCallback).toHaveBeenCalledWith(runner, undefined)
+  })
+})

src/base/common/downloadUtil.test.ts

@@ -122,6 +122,22 @@ describe('downloadUtil', () => {
       expect(createObjectURLSpy).not.toHaveBeenCalled()
     })
 
+    it('throws for an empty URL', () => {
+      expect(() => downloadFile('')).toThrow(
+        'Invalid URL provided for download'
+      )
+      expect(fetchMock).not.toHaveBeenCalled()
+      expect(createObjectURLSpy).not.toHaveBeenCalled()
+    })
+
+    it('throws for a whitespace URL', () => {
+      expect(() => downloadFile('   ')).toThrow(
+        'Invalid URL provided for download'
+      )
+      expect(fetchMock).not.toHaveBeenCalled()
+      expect(createObjectURLSpy).not.toHaveBeenCalled()
+    })
+
     it('should prefer custom filename over extracted filename', () => {
       const testUrl =
         'https://example.com/api/file?filename=extracted-image.jpg'

src/base/credits/comfyCredits.test.ts

@@ -4,6 +4,7 @@ import {
   CREDITS_PER_USD,
   COMFY_CREDIT_RATE_CENTS,
   centsToCredits,
+  clampUsd,
   creditsToCents,
   creditsToUsd,
   formatCredits,
@@ -43,4 +44,21 @@ describe('comfyCredits helpers', () => {
     expect(formatCreditsFromUsd({ usd: 1, locale })).toBe('211.00')
     expect(formatUsd({ value: 4.2, locale })).toBe('4.20')
   })
+
+  test('formats with compatible fraction digit bounds', () => {
+    expect(
+      formatCredits({
+        value: 12.345,
+        locale: 'en-US',
+        numberOptions: { minimumFractionDigits: 4, maximumFractionDigits: 2 }
+      })
+    ).toBe('12.35')
+  })
+
+  test('clamps USD purchase values into the supported range', () => {
+    expect(clampUsd(Number.NaN)).toBe(0)
+    expect(clampUsd(-5)).toBe(1)
+    expect(clampUsd(42)).toBe(42)
+    expect(clampUsd(5000)).toBe(1000)
+  })
 })

src/components/error/ErrorOverlay.vue

@@ -37,7 +37,7 @@
             size="unset"
             class="min-h-8 rounded-lg px-3 py-2 text-xs font-normal"
             data-testid="error-overlay-see-errors"
-            @click="seeErrors"
+            @click="viewErrorsInGraph"
           >
             {{
               appMode
@@ -67,31 +67,18 @@ import { useI18n } from 'vue-i18n'
 
 import Button from '@/components/ui/button/Button.vue'
 import { useExecutionErrorStore } from '@/stores/executionErrorStore'
-import { useRightSidePanelStore } from '@/stores/workspace/rightSidePanelStore'
-import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useErrorOverlayState } from '@/components/error/useErrorOverlayState'
+import { useViewErrorsInGraph } from '@/composables/useViewErrorsInGraph'
 
 const { appMode = false } = defineProps<{ appMode?: boolean }>()
 
 const { t } = useI18n()
 const executionErrorStore = useExecutionErrorStore()
-const rightSidePanelStore = useRightSidePanelStore()
-const canvasStore = useCanvasStore()
+const { viewErrorsInGraph } = useViewErrorsInGraph()
 
 const { isVisible, overlayMessage, overlayTitle } = useErrorOverlayState()
 
 function dismiss() {
   executionErrorStore.dismissErrorOverlay()
 }
-
-function seeErrors() {
-  canvasStore.linearMode = false
-  if (canvasStore.canvas) {
-    canvasStore.canvas.deselectAll()
-    canvasStore.updateSelectedItems()
-  }
-
-  rightSidePanelStore.openPanel('errors')
-  executionErrorStore.dismissErrorOverlay()
-}
 </script>

src/components/topbar/CurrentUserPopoverLegacy.vue

@@ -224,7 +224,7 @@ const handleOpenUserSettings = () => {
 }
 
 const handleOpenPlansAndPricing = () => {
-  subscriptionDialog.showPricingTable()
+  subscriptionDialog.showPricingTable({ reason: 'avatar_menu_plans' })
   emit('close')
 }
 
@@ -239,8 +239,7 @@ const handleOpenPlanAndCreditsSettings = () => {
 }
 
 const handleTopUp = () => {
-  // Track purchase credits entry from avatar popover
-  useTelemetry()?.trackAddApiCreditButtonClicked()
+  useTelemetry()?.trackAddApiCreditButtonClicked({ source: 'avatar_menu' })
   dialogService.showTopUpCreditsDialog()
   emit('close')
 }
@@ -254,7 +253,7 @@ const handleOpenPartnerNodesInfo = () => {
 }
 
 const handleUpgradeToAddCredits = () => {
-  subscriptionDialog.showPricingTable()
+  subscriptionDialog.showPricingTable({ reason: 'upgrade_to_add_credits' })
   emit('close')
 }
 

src/components/topbar/TopbarSubscribeButton.vue

@@ -21,6 +21,6 @@ const { isFreeTier } = useBillingContext()
 const subscriptionDialog = useSubscriptionDialog()
 
 function handleClick() {
-  subscriptionDialog.showPricingTable()
+  subscriptionDialog.showPricingTable({ reason: 'subscribe_now_button' })
 }
 </script>

src/composables/billing/types.ts

@@ -1,5 +1,6 @@
 import type { ComputedRef, Ref } from 'vue'
 
+import type { SubscriptionDialogOptions } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type { TierKey } from '@/platform/cloud/subscription/constants/tierPricing'
 import type {
   BillingStatus,
@@ -75,9 +76,10 @@ export interface BillingActions {
    */
   requireActiveSubscription: () => Promise<void>
   /**
-   * Shows the subscription dialog.
+   * Shows the subscription dialog. Pass a reason so the paywall open and any
+   * downstream checkout stay attributed to the triggering product moment.
    */
-  showSubscriptionDialog: () => void
+  showSubscriptionDialog: (options?: SubscriptionDialogOptions) => void
 }
 
 export interface BillingState {

src/composables/billing/useBillingContext.ts

@@ -7,6 +7,7 @@ import {
   getTierFeatures
 } from '@/platform/cloud/subscription/constants/tierPricing'
 import type { TierKey } from '@/platform/cloud/subscription/constants/tierPricing'
+import type { SubscriptionDialogOptions } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type {
   PreviewSubscribeOptions,
   SubscribeOptions
@@ -281,8 +282,8 @@ function useBillingContextInternal(): BillingContext {
     return activeContext.value.requireActiveSubscription()
   }
 
-  function showSubscriptionDialog() {
-    return activeContext.value.showSubscriptionDialog()
+  function showSubscriptionDialog(options?: SubscriptionDialogOptions) {
+    return activeContext.value.showSubscriptionDialog(options)
   }
 
   return {

src/composables/billing/useLegacyBilling.ts

@@ -2,6 +2,7 @@ import { computed, ref } from 'vue'
 
 import { useAuthActions } from '@/composables/auth/useAuthActions'
 import { useSubscription } from '@/platform/cloud/subscription/composables/useSubscription'
+import type { SubscriptionDialogOptions } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type {
   BillingStatus,
   BillingSubscriptionStatus,
@@ -189,12 +190,12 @@ export function useLegacyBilling(): BillingState & BillingActions {
   async function requireActiveSubscription(): Promise<void> {
     await fetchStatus()
     if (!isActiveSubscription.value) {
-      legacyShowSubscriptionDialog()
+      legacyShowSubscriptionDialog({ reason: 'subscription_required' })
     }
   }
 
-  function showSubscriptionDialog(): void {
-    legacyShowSubscriptionDialog()
+  function showSubscriptionDialog(options?: SubscriptionDialogOptions): void {
+    legacyShowSubscriptionDialog(options)
   }
 
   return {

src/composables/useCoreCommands.ts

@@ -503,7 +503,7 @@ export function useCoreCommands(): ComfyCommand[] {
       }) => {
         trackRunButton(metadata)
         if (!isActiveSubscription.value) {
-          showSubscriptionDialog()
+          showSubscriptionDialog({ reason: 'subscribe_to_run' })
           return
         }
 
@@ -526,7 +526,7 @@ export function useCoreCommands(): ComfyCommand[] {
       }) => {
         trackRunButton(metadata)
         if (!isActiveSubscription.value) {
-          showSubscriptionDialog()
+          showSubscriptionDialog({ reason: 'subscribe_to_run' })
           return
         }
 
@@ -548,7 +548,7 @@ export function useCoreCommands(): ComfyCommand[] {
       }) => {
         trackRunButton(metadata)
         if (!isActiveSubscription.value) {
-          showSubscriptionDialog()
+          showSubscriptionDialog({ reason: 'subscribe_to_run' })
           return
         }
 

src/composables/useViewErrorsInGraph.test.ts

@@ -0,0 +1,105 @@
+import { createPinia, setActivePinia } from 'pinia'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { useExecutionErrorStore } from '@/stores/executionErrorStore'
+import { useRightSidePanelStore } from '@/stores/workspace/rightSidePanelStore'
+import { LGraph, LGraphCanvas, LGraphNode } from '@/lib/litegraph/src/litegraph'
+import { createMockCanvasRenderingContext2D } from '@/utils/__tests__/litegraphTestUtils'
+import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
+
+import { useViewErrorsInGraph } from './useViewErrorsInGraph'
+
+const apiMock = vi.hoisted(() => ({
+  getSettings: vi.fn(),
+  storeSetting: vi.fn(),
+  storeSettings: vi.fn()
+}))
+
+vi.mock('@/scripts/api', () => ({
+  api: apiMock
+}))
+
+const appMock = vi.hoisted(() => ({
+  ui: {
+    settings: {
+      dispatchChange: vi.fn()
+    }
+  },
+  rootGraph: {
+    events: new EventTarget(),
+    nodes: []
+  }
+}))
+
+vi.mock('@/scripts/app', () => ({
+  app: appMock
+}))
+
+function createSelectedCanvas() {
+  const graph = new LGraph()
+  const canvasElement = document.createElement('canvas')
+  canvasElement.width = 800
+  canvasElement.height = 600
+  canvasElement.getContext = vi
+    .fn()
+    .mockReturnValue(createMockCanvasRenderingContext2D())
+
+  const canvas = new LGraphCanvas(canvasElement, graph, {
+    skip_events: true,
+    skip_render: true
+  })
+  const node = new LGraphNode('Selected Node')
+  graph.add(node)
+  canvas.selectedItems.add(node)
+  node.selected = true
+
+  return { canvas, node }
+}
+
+describe('useViewErrorsInGraph', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    setActivePinia(createPinia())
+    apiMock.getSettings.mockResolvedValue({})
+    apiMock.storeSetting.mockResolvedValue(undefined)
+    apiMock.storeSettings.mockResolvedValue(undefined)
+  })
+
+  it('opens graph errors and clears app-mode error UI state', () => {
+    const canvasStore = useCanvasStore()
+    const executionErrorStore = useExecutionErrorStore()
+    const rightSidePanelStore = useRightSidePanelStore()
+    const workflowStore = useWorkflowStore()
+    const { canvas, node } = createSelectedCanvas()
+    workflowStore.activeWorkflow = {
+      activeMode: 'app'
+    } as typeof workflowStore.activeWorkflow
+    canvasStore.canvas = canvas
+    canvasStore.selectedItems = [node]
+    executionErrorStore.showErrorOverlay()
+
+    useViewErrorsInGraph().viewErrorsInGraph()
+
+    expect(node.selected).toBe(false)
+    expect(canvasStore.linearMode).toBe(false)
+    expect(canvasStore.selectedItems).toEqual([])
+    expect(rightSidePanelStore.activeTab).toBe('errors')
+    expect(rightSidePanelStore.isOpen).toBe(true)
+    expect(executionErrorStore.isErrorOverlayOpen).toBe(false)
+  })
+
+  it('opens graph errors when the canvas is not initialized', () => {
+    const canvasStore = useCanvasStore()
+    const executionErrorStore = useExecutionErrorStore()
+    const rightSidePanelStore = useRightSidePanelStore()
+    canvasStore.canvas = null
+    executionErrorStore.showErrorOverlay()
+
+    expect(() => useViewErrorsInGraph().viewErrorsInGraph()).not.toThrow()
+
+    expect(rightSidePanelStore.activeTab).toBe('errors')
+    expect(rightSidePanelStore.isOpen).toBe(true)
+    expect(executionErrorStore.isErrorOverlayOpen).toBe(false)
+  })
+})

src/composables/useViewErrorsInGraph.ts

@@ -0,0 +1,22 @@
+import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
+import { useExecutionErrorStore } from '@/stores/executionErrorStore'
+import { useRightSidePanelStore } from '@/stores/workspace/rightSidePanelStore'
+
+export function useViewErrorsInGraph() {
+  const canvasStore = useCanvasStore()
+  const executionErrorStore = useExecutionErrorStore()
+  const rightSidePanelStore = useRightSidePanelStore()
+
+  function viewErrorsInGraph() {
+    canvasStore.linearMode = false
+    if (canvasStore.canvas) {
+      canvasStore.canvas.deselectAll()
+      canvasStore.updateSelectedItems()
+    }
+
+    rightSidePanelStore.openPanel('errors')
+    executionErrorStore.dismissErrorOverlay()
+  }
+
+  return { viewErrorsInGraph }
+}

src/platform/assets/components/UploadModelUpgradeModal.vue

@@ -25,6 +25,6 @@ function handleClose() {
 }
 
 function handleSubscribe() {
-  showSubscriptionDialog()
+  showSubscriptionDialog({ reason: 'upload_model_upgrade' })
 }
 </script>

src/platform/cloud/onboarding/CloudSubscriptionRedirectView.test.ts

@@ -140,7 +140,10 @@ describe('CloudSubscriptionRedirectView', () => {
     expect(mockPerformSubscriptionCheckout).toHaveBeenCalledWith(
       'creator',
       'monthly',
-      false
+      {
+        openInNewTab: false,
+        paymentIntentSource: 'deep_link'
+      }
     )
 
     // Shows loading affordances
@@ -169,7 +172,10 @@ describe('CloudSubscriptionRedirectView', () => {
     expect(mockPerformSubscriptionCheckout).toHaveBeenCalledWith(
       'creator',
       'monthly',
-      false
+      {
+        openInNewTab: false,
+        paymentIntentSource: 'deep_link'
+      }
     )
   })
 
@@ -180,7 +186,8 @@ describe('CloudSubscriptionRedirectView', () => {
     expect(screen.getByText('Subscribe to Team Plan')).toBeInTheDocument()
     expect(mockPerformTeamSubscriptionCheckout).toHaveBeenCalledWith(
       'team_700',
-      'yearly'
+      'yearly',
+      { paymentIntentSource: 'deep_link' }
     )
     // Team never goes through the personal checkout path
     expect(mockPerformSubscriptionCheckout).not.toHaveBeenCalled()

src/platform/cloud/onboarding/CloudSubscriptionRedirectView.vue

@@ -94,7 +94,9 @@ const runRedirect = wrapWithErrorHandlingAsync(async () => {
       return
     }
     isTeamCheckout.value = true
-    await performTeamSubscriptionCheckout(stopId, billingCycle)
+    await performTeamSubscriptionCheckout(stopId, billingCycle, {
+      paymentIntentSource: 'deep_link'
+    })
     return
   }
 
@@ -112,7 +114,10 @@ const runRedirect = wrapWithErrorHandlingAsync(async () => {
   if (isActiveSubscription.value) {
     await accessBillingPortal(undefined, false)
   } else {
-    await performSubscriptionCheckout(tierKeyParam, billingCycle, false)
+    await performSubscriptionCheckout(tierKeyParam, billingCycle, {
+      openInNewTab: false,
+      paymentIntentSource: 'deep_link'
+    })
   }
 }, reportError)
 

src/platform/cloud/subscription/components/CreditsTile.vue

@@ -351,12 +351,12 @@ const handleRefresh = wrapWithErrorHandlingAsync(async () => {
 })
 
 function handleAddCredits() {
-  telemetry?.trackAddApiCreditButtonClicked()
+  telemetry?.trackAddApiCreditButtonClicked({ source: 'credits_panel' })
   void dialogService.showTopUpCreditsDialog()
 }
 
 function handleUpgradeToAddCredits() {
-  showPricingTable()
+  showPricingTable({ reason: 'upgrade_to_add_credits' })
 }
 
 async function handleWindowFocus() {

src/platform/cloud/subscription/components/FreeTierDialogContent.test.ts

@@ -5,6 +5,8 @@ import { render, screen } from '@testing-library/vue'
 
 import enMessages from '@/locales/en/main.json' with { type: 'json' }
 
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
+
 import FreeTierDialogContent from './FreeTierDialogContent.vue'
 
 const mockRenewalDate = vi.hoisted(() => ({ value: null as string | null }))
@@ -15,7 +17,7 @@ vi.mock('@/composables/billing/useBillingContext', () => ({
   }))
 }))
 
-function renderComponent() {
+function renderComponent(props?: { reason?: PaymentIntentSource }) {
   const i18n = createI18n({
     legacy: false,
     locale: 'en',
@@ -23,6 +25,7 @@ function renderComponent() {
   })
 
   return render(FreeTierDialogContent, {
+    props,
     global: {
       plugins: [i18n]
     }
@@ -43,4 +46,18 @@ describe('FreeTierDialogContent', () => {
     renderComponent()
     expect(screen.queryByText(/credits refresh on/)).not.toBeInTheDocument()
   })
+
+  it('keeps the generic copy for intent reasons outside the credits variants', () => {
+    mockRenewalDate.value = '2026-07-15T10:00:00Z'
+    renderComponent({ reason: 'subscribe_to_run' })
+    expect(
+      screen.getByText('Your credits refresh on Jul 15, 2026.')
+    ).toBeInTheDocument()
+  })
+
+  it('swaps to the out-of-credits copy without the refresh line', () => {
+    mockRenewalDate.value = '2026-07-15T10:00:00Z'
+    renderComponent({ reason: 'out_of_credits' })
+    expect(screen.queryByText(/credits refresh on/)).not.toBeInTheDocument()
+  })
 })

src/platform/cloud/subscription/components/FreeTierDialogContent.vue

@@ -52,7 +52,7 @@
           </p>
 
           <p
-            v-if="!reason || reason === 'subscription_required'"
+            v-if="!isCreditsBlockedVariant"
             class="m-0 text-sm text-text-secondary"
           >
             {{
@@ -65,10 +65,7 @@
           </p>
 
           <p
-            v-if="
-              (!reason || reason === 'subscription_required') &&
-              formattedRenewalDate
-            "
+            v-if="!isCreditsBlockedVariant && formattedRenewalDate"
             class="m-0 text-sm text-text-secondary"
           >
             {{
@@ -88,7 +85,7 @@
           @click="$emit('upgrade')"
         >
           {{
-            reason === 'out_of_credits' || reason === 'top_up_blocked'
+            isCreditsBlockedVariant
               ? $t('subscription.freeTier.upgradeCta')
               : $t('subscription.freeTier.subscribeCta')
           }}
@@ -103,12 +100,12 @@ import { computed } from 'vue'
 
 import Button from '@/components/ui/button/Button.vue'
 import { useBillingContext } from '@/composables/billing/useBillingContext'
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 import SubscriptionBenefits from '@/platform/cloud/subscription/components/SubscriptionBenefits.vue'
 import { getTierCredits } from '@/platform/cloud/subscription/constants/tierPricing'
 
-defineProps<{
-  reason?: SubscriptionDialogReason
+const { reason } = defineProps<{
+  reason?: PaymentIntentSource
 }>()
 
 defineEmits<{
@@ -129,4 +126,10 @@ const formattedRenewalDate = computed(() => {
 })
 
 const freeTierCredits = computed(() => getTierCredits('free'))
+
+// Only these two variants replace the generic free-tier copy; any other
+// intent reason (subscribe_to_run, deep_link, ...) keeps the default pitch.
+const isCreditsBlockedVariant = computed(
+  () => reason === 'out_of_credits' || reason === 'top_up_blocked'
+)
 </script>

src/platform/cloud/subscription/components/PricingTable.test.ts

@@ -261,6 +261,7 @@ describe('PricingTable', () => {
         tier: 'creator',
         cycle: 'yearly',
         checkout_type: 'change',
+        checkout_attempt_id: expect.any(String),
         previous_tier: 'standard'
       })
       expect(mockAccessBillingPortal).toHaveBeenCalledWith('creator-yearly')
@@ -341,6 +342,7 @@ describe('PricingTable', () => {
       expect(
         window.localStorage.getItem(PENDING_SUBSCRIPTION_CHECKOUT_STORAGE_KEY)
       ).toBeNull()
+      expect(mockTrackBeginCheckout).not.toHaveBeenCalled()
     })
 
     it('should use the latest userId value when it changes after mount', async () => {
@@ -366,6 +368,7 @@ describe('PricingTable', () => {
         tier: 'creator',
         cycle: 'yearly',
         checkout_type: 'change',
+        checkout_attempt_id: expect.any(String),
         previous_tier: 'standard'
       })
     })

src/platform/cloud/subscription/components/PricingTable.vue

@@ -277,13 +277,19 @@ import type {
   TierKey,
   TierPricing
 } from '@/platform/cloud/subscription/constants/tierPricing'
-import { recordPendingSubscriptionCheckoutAttempt } from '@/platform/cloud/subscription/utils/subscriptionCheckoutTracker'
+import {
+  recordPendingSubscriptionCheckoutAttempt,
+  withPendingCheckoutAttemptId
+} from '@/platform/cloud/subscription/utils/subscriptionCheckoutTracker'
 import { performSubscriptionCheckout } from '@/platform/cloud/subscription/utils/subscriptionCheckoutUtil'
 import { isPlanDowngrade } from '@/platform/cloud/subscription/utils/subscriptionTierRank'
 import type { BillingCycle } from '@/platform/cloud/subscription/utils/subscriptionTierRank'
 import { isCloud } from '@/platform/distribution/types'
 import { useTelemetry } from '@/platform/telemetry'
-import type { CheckoutAttributionMetadata } from '@/platform/telemetry/types'
+import type {
+  CheckoutAttributionMetadata,
+  PaymentIntentSource
+} from '@/platform/telemetry/types'
 import { useAuthStore } from '@/stores/authStore'
 
 type CheckoutTierKey = Exclude<TierKey, 'free' | 'founder'>
@@ -321,6 +327,10 @@ interface PricingTierConfig {
   isPopular?: boolean
 }
 
+const { reason } = defineProps<{
+  reason?: PaymentIntentSource
+}>()
+
 const emit = defineEmits<{
   chooseTeamWorkspace: []
 }>()
@@ -463,16 +473,17 @@ const handleSubscribe = wrapWithErrorHandlingAsync(
         } as const
         const previousPlan = currentPlanDescriptor.value
         const checkoutAttribution = await getCheckoutAttributionForCloud()
-        if (userId.value) {
-          telemetry?.trackBeginCheckout({
-            user_id: userId.value,
-            tier: targetPlan.tierKey,
-            cycle: targetPlan.billingCycle,
-            checkout_type: 'change',
-            ...checkoutAttribution,
-            ...(previousPlan ? { previous_tier: previousPlan.tierKey } : {})
-          })
-        }
+        const beginCheckoutMetadata = userId.value
+          ? {
+              user_id: userId.value,
+              tier: targetPlan.tierKey,
+              cycle: targetPlan.billingCycle,
+              checkout_type: 'change' as const,
+              ...(reason ? { payment_intent_source: reason } : {}),
+              ...checkoutAttribution,
+              ...(previousPlan ? { previous_tier: previousPlan.tierKey } : {})
+            }
+          : null
         // Pass the target tier to create a deep link to subscription update confirmation
         const checkoutTier = getCheckoutTier(
           targetPlan.tierKey,
@@ -487,29 +498,39 @@ const handleSubscribe = wrapWithErrorHandlingAsync(
 
         if (downgrade) {
           // TODO(COMFY-StripeProration): Remove once backend checkout creation mirrors portal proration ("change at billing end")
-          await accessBillingPortal()
+          const didOpenPortal = await accessBillingPortal()
+          if (didOpenPortal && beginCheckoutMetadata) {
+            telemetry?.trackBeginCheckout(beginCheckoutMetadata)
+          }
         } else {
           const didOpenPortal = await accessBillingPortal(checkoutTier)
           if (!didOpenPortal) {
             return
           }
 
-          recordPendingSubscriptionCheckoutAttempt({
+          const pendingAttempt = recordPendingSubscriptionCheckoutAttempt({
             tier: targetPlan.tierKey,
             cycle: targetPlan.billingCycle,
             checkout_type: 'change',
+            payment_intent_source: reason,
             ...(previousPlan ? { previous_tier: previousPlan.tierKey } : {}),
             ...(previousPlan
               ? { previous_cycle: previousPlan.billingCycle }
               : {})
           })
+          if (beginCheckoutMetadata) {
+            telemetry?.trackBeginCheckout(
+              withPendingCheckoutAttemptId(
+                beginCheckoutMetadata,
+                pendingAttempt
+              )
+            )
+          }
         }
       } else {
-        await performSubscriptionCheckout(
-          tierKey,
-          currentBillingCycle.value,
-          true
-        )
+        await performSubscriptionCheckout(tierKey, currentBillingCycle.value, {
+          paymentIntentSource: reason
+        })
       }
     } finally {
       isLoading.value = false

src/platform/cloud/subscription/components/SubscribeButton.vue

@@ -56,7 +56,7 @@ const handleSubscribe = () => {
     current_tier: tier.value?.toLowerCase()
   })
   isAwaitingStripeSubscription.value = true
-  showSubscriptionDialog()
+  showSubscriptionDialog({ reason: 'subscribe_now_button' })
 }
 
 onBeforeUnmount(() => {

src/platform/cloud/subscription/components/SubscribeToRun.vue

@@ -54,6 +54,6 @@ function handleSubscribeToRun() {
     trackRunButton({ subscribe_to_run: true })
   }
 
-  showSubscriptionDialog()
+  showSubscriptionDialog({ reason: 'subscribe_to_run' })
 }
 </script>

src/platform/cloud/subscription/components/SubscriptionPanelContentLegacy.vue

@@ -48,7 +48,9 @@
             v-if="isActiveSubscription"
             variant="primary"
             class="rounded-lg px-4 py-2 text-sm font-normal text-text-primary"
-            @click="showSubscriptionDialog"
+            @click="
+              showSubscriptionDialog({ reason: 'settings_billing_panel' })
+            "
           >
             {{ $t('subscription.upgradePlan') }}
           </Button>

src/platform/cloud/subscription/components/SubscriptionRequiredDialogContent.vue

@@ -33,7 +33,11 @@
       </i18n-t>
     </div>
 
-    <PricingTable class="flex-1" @choose-team-workspace="handleChooseTeam" />
+    <PricingTable
+      :reason
+      class="flex-1"
+      @choose-team-workspace="handleChooseTeam"
+    />
 
     <!-- Contact and Enterprise Links -->
     <div class="flex flex-col items-center gap-2">
@@ -157,11 +161,11 @@ import { useBillingContext } from '@/composables/billing/useBillingContext'
 import { isCloud } from '@/platform/distribution/types'
 import { useTelemetry } from '@/platform/telemetry'
 import { useCommandStore } from '@/stores/commandStore'
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 
 const { onClose, reason, onChooseTeam } = defineProps<{
   onClose: () => void
-  reason?: SubscriptionDialogReason
+  reason?: PaymentIntentSource
   onChooseTeam?: () => void
 }>()
 

src/platform/cloud/subscription/composables/useAccountPreconditionDialog.ts

@@ -24,7 +24,9 @@ export function useAccountPreconditionDialog() {
         )
         return
       case 'subscription':
-        void dialogService.showSubscriptionRequiredDialog()
+        void dialogService.showSubscriptionRequiredDialog({
+          reason: 'subscription_required'
+        })
         return
       case 'credits':
         void dialogService.showTopUpCreditsDialog({

src/platform/cloud/subscription/composables/usePricingTableUrlLoader.test.ts

@@ -55,12 +55,6 @@ vi.mock('@/platform/workspace/stores/teamWorkspaceStore', () => ({
   })
 }))
 
-const mockTrackSubscription = vi.hoisted(() => vi.fn())
-
-vi.mock('@/platform/telemetry', () => ({
-  useTelemetry: () => ({ trackSubscription: mockTrackSubscription })
-}))
-
 describe('usePricingTableUrlLoader', () => {
   beforeEach(() => {
     vi.clearAllMocks()
@@ -96,9 +90,6 @@ describe('usePricingTableUrlLoader', () => {
       reason: 'deep_link',
       planMode: undefined
     })
-    expect(mockTrackSubscription).toHaveBeenCalledWith('modal_opened', {
-      reason: 'deep_link'
-    })
     expect(mockRouterReplace).toHaveBeenCalledWith({ query: {} })
   })
 
@@ -150,7 +141,6 @@ describe('usePricingTableUrlLoader', () => {
     await loadPricingTableFromUrl()
 
     expect(mockShowPricingTable).not.toHaveBeenCalled()
-    expect(mockTrackSubscription).not.toHaveBeenCalled()
   })
 
   it('denies, strips, and clears together when the user is not eligible', async () => {
@@ -161,7 +151,6 @@ describe('usePricingTableUrlLoader', () => {
     await loadPricingTableFromUrl()
 
     expect(mockShowPricingTable).not.toHaveBeenCalled()
-    expect(mockTrackSubscription).not.toHaveBeenCalled()
     expect(mockRouterReplace).toHaveBeenCalledWith({
       query: { other: 'param' }
     })
@@ -230,7 +219,6 @@ describe('usePricingTableUrlLoader', () => {
     )
 
     expect(mockShowPricingTable).not.toHaveBeenCalled()
-    expect(mockTrackSubscription).not.toHaveBeenCalled()
     expect(mockRouterReplace).toHaveBeenCalledWith({ query: {} })
     expect(preservedQueryMocks.clearPreservedQuery).toHaveBeenCalledWith(
       'pricing'

src/platform/cloud/subscription/composables/usePricingTableUrlLoader.ts

@@ -7,7 +7,6 @@ import {
   mergePreservedQueryIntoQuery
 } from '@/platform/navigation/preservedQueryManager'
 import { PRESERVED_QUERY_NAMESPACES } from '@/platform/navigation/preservedQueryNamespaces'
-import { useTelemetry } from '@/platform/telemetry'
 import { useWorkspaceUI } from '@/platform/workspace/composables/useWorkspaceUI'
 import { useTeamWorkspaceStore } from '@/platform/workspace/stores/teamWorkspaceStore'
 
@@ -62,7 +61,6 @@ export function usePricingTableUrlLoader() {
     const planMode =
       param === 'team' || param === 'personal' ? param : undefined
 
-    useTelemetry()?.trackSubscription('modal_opened', { reason: 'deep_link' })
     subscriptionDialog.showPricingTable({ reason: 'deep_link', planMode })
   }
 

src/platform/cloud/subscription/composables/useSubscription.ts

@@ -15,7 +15,7 @@ import { t } from '@/i18n'
 import { fetchWithUnifiedRemint } from '@/platform/auth/unified/remintRetry'
 import { isCloud } from '@/platform/distribution/types'
 import { useTelemetry } from '@/platform/telemetry'
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { SubscriptionDialogOptions } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type { CheckoutAttributionMetadata } from '@/platform/telemetry/types'
 import { AuthStoreError, useAuthStore } from '@/stores/authStore'
 import { useDialogService } from '@/services/dialogService'
@@ -237,14 +237,7 @@ function useSubscriptionInternal() {
     })
   }, reportError)
 
-  const showSubscriptionDialog = (options?: {
-    reason?: SubscriptionDialogReason
-  }) => {
-    useTelemetry()?.trackSubscription('modal_opened', {
-      current_tier: subscriptionTier.value?.toLowerCase(),
-      reason: options?.reason
-    })
-
+  const showSubscriptionDialog = (options?: SubscriptionDialogOptions) => {
     void showSubscriptionRequiredDialog(options)
   }
 
@@ -277,7 +270,7 @@ function useSubscriptionInternal() {
     await fetchSubscriptionStatus()
 
     if (!isSubscribedOrIsNotCloud.value) {
-      showSubscriptionDialog()
+      showSubscriptionDialog({ reason: 'subscription_required' })
     }
   }
 

src/platform/cloud/subscription/composables/useSubscriptionActions.test.ts

@@ -39,15 +39,23 @@ vi.mock('@/stores/commandStore', () => ({
 }))
 
 // useTelemetry() returns null in OSS, a dispatcher in cloud — toggle via mockIsCloud.
-const { mockIsCloud, mockTrackHelpResourceClicked } = vi.hoisted(() => ({
+const {
+  mockIsCloud,
+  mockTrackHelpResourceClicked,
+  mockTrackAddApiCreditButtonClicked
+} = vi.hoisted(() => ({
   mockIsCloud: { value: true },
-  mockTrackHelpResourceClicked: vi.fn()
+  mockTrackHelpResourceClicked: vi.fn(),
+  mockTrackAddApiCreditButtonClicked: vi.fn()
 }))
 
 vi.mock('@/platform/telemetry', () => ({
   useTelemetry: () =>
     mockIsCloud.value
-      ? { trackHelpResourceClicked: mockTrackHelpResourceClicked }
+      ? {
+          trackHelpResourceClicked: mockTrackHelpResourceClicked,
+          trackAddApiCreditButtonClicked: mockTrackAddApiCreditButtonClicked
+        }
       : null
 }))
 
@@ -69,6 +77,9 @@ describe('useSubscriptionActions', () => {
       const { handleAddApiCredits } = useSubscriptionActions()
       handleAddApiCredits()
       expect(mockShowTopUpCreditsDialog).toHaveBeenCalledOnce()
+      expect(mockTrackAddApiCreditButtonClicked).toHaveBeenCalledWith({
+        source: 'settings_billing_panel'
+      })
     })
   })
 

src/platform/cloud/subscription/composables/useSubscriptionActions.ts

@@ -21,6 +21,9 @@ export function useSubscriptionActions() {
   })
 
   const handleAddApiCredits = () => {
+    telemetry?.trackAddApiCreditButtonClicked({
+      source: 'settings_billing_panel'
+    })
     void dialogService.showTopUpCreditsDialog()
   }
 

src/platform/cloud/subscription/composables/useSubscriptionDialog.test.ts

@@ -5,8 +5,10 @@ import { useSubscriptionDialog } from './useSubscriptionDialog'
 const mockCloseDialog = vi.fn()
 const mockShowLayoutDialog = vi.fn()
 const mockShowTeamWorkspacesDialog = vi.fn()
+const mockTrackSubscription = vi.hoisted(() => vi.fn())
 const mockIsInPersonalWorkspace = vi.hoisted(() => ({ value: true }))
 const mockIsFreeTier = vi.hoisted(() => ({ value: false }))
+const mockTier = vi.hoisted(() => ({ value: 'FREE' as string | null }))
 const mockTeamWorkspacesEnabled = vi.hoisted(() => ({ value: false }))
 const mockIsCloud = vi.hoisted(() => ({ value: true }))
 const mockIsLegacyTeamPlan = vi.hoisted(() => ({ value: false }))
@@ -60,10 +62,15 @@ vi.mock('@/platform/workspace/stores/teamWorkspaceStore', () => ({
 vi.mock('@/composables/billing/useBillingContext', () => ({
   useBillingContext: () => ({
     isFreeTier: mockIsFreeTier,
-    isLegacyTeamPlan: mockIsLegacyTeamPlan
+    isLegacyTeamPlan: mockIsLegacyTeamPlan,
+    tier: mockTier
   })
 }))
 
+vi.mock('@/platform/telemetry', () => ({
+  useTelemetry: () => ({ trackSubscription: mockTrackSubscription })
+}))
+
 vi.mock('@/platform/workspace/composables/useWorkspaceUI', () => ({
   useWorkspaceUI: () => ({
     permissions: {
@@ -80,6 +87,7 @@ describe('useSubscriptionDialog', () => {
     mockIsCloud.value = true
     mockIsInPersonalWorkspace.value = true
     mockIsFreeTier.value = false
+    mockTier.value = 'FREE'
     mockTeamWorkspacesEnabled.value = false
     mockIsLegacyTeamPlan.value = false
     mockCanManageSubscription.value = true
@@ -198,6 +206,51 @@ describe('useSubscriptionDialog', () => {
       const props = mockShowLayoutDialog.mock.calls[0][0].props
       expect(props.initialPlanMode).toBe('team')
     })
+
+    it('tracks modal_opened with the caller reason and current tier', () => {
+      mockTier.value = 'STANDARD'
+      const { showPricingTable } = useSubscriptionDialog()
+
+      showPricingTable({ reason: 'upgrade_to_add_credits' })
+
+      expect(mockTrackSubscription).toHaveBeenCalledWith('modal_opened', {
+        current_tier: 'standard',
+        reason: 'upgrade_to_add_credits'
+      })
+    })
+
+    it('tracks modal_opened on the workspace (unified) path too', () => {
+      mockTeamWorkspacesEnabled.value = true
+      const { showPricingTable } = useSubscriptionDialog()
+
+      showPricingTable({ reason: 'subscribe_to_run' })
+
+      expect(mockTrackSubscription).toHaveBeenCalledWith(
+        'modal_opened',
+        expect.objectContaining({ reason: 'subscribe_to_run' })
+      )
+    })
+
+    it('does not track modal_opened for the inactive member dialog', () => {
+      mockTeamWorkspacesEnabled.value = true
+      mockIsInPersonalWorkspace.value = false
+      mockCanManageSubscription.value = false
+      const { showPricingTable } = useSubscriptionDialog()
+
+      showPricingTable({ reason: 'subscribe_to_run' })
+
+      expect(mockShowLayoutDialog).toHaveBeenCalledTimes(1)
+      expect(mockTrackSubscription).not.toHaveBeenCalled()
+    })
+
+    it('does not track on non-cloud', () => {
+      mockIsCloud.value = false
+      const { showPricingTable } = useSubscriptionDialog()
+
+      showPricingTable({ reason: 'subscribe_to_run' })
+
+      expect(mockTrackSubscription).not.toHaveBeenCalled()
+    })
   })
 
   describe('show', () => {
@@ -235,6 +288,20 @@ describe('useSubscriptionDialog', () => {
         expect.objectContaining({ key: 'subscription-required' })
       )
     })
+
+    it('tracks modal_opened with the reason for the free-tier dialog', () => {
+      mockIsFreeTier.value = true
+      mockIsInPersonalWorkspace.value = true
+      const { show } = useSubscriptionDialog()
+
+      show({ reason: 'out_of_credits' })
+
+      expect(mockTrackSubscription).toHaveBeenCalledTimes(1)
+      expect(mockTrackSubscription).toHaveBeenCalledWith(
+        'modal_opened',
+        expect.objectContaining({ reason: 'out_of_credits' })
+      )
+    })
   })
 
   describe('startTeamWorkspaceUpgradeFlow', () => {

src/platform/cloud/subscription/composables/useSubscriptionDialog.ts

@@ -4,6 +4,8 @@ import { useDialogStore } from '@/stores/dialogStore'
 import { useBillingContext } from '@/composables/billing/useBillingContext'
 import { useFeatureFlags } from '@/composables/useFeatureFlags'
 import { isCloud } from '@/platform/distribution/types'
+import { useTelemetry } from '@/platform/telemetry'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 import { useWorkspaceUI } from '@/platform/workspace/composables/useWorkspaceUI'
 import { useTeamWorkspaceStore } from '@/platform/workspace/stores/teamWorkspaceStore'
 
@@ -11,14 +13,8 @@ const DIALOG_KEY = 'subscription-required'
 const FREE_TIER_DIALOG_KEY = 'free-tier-info'
 const RESUME_PRICING_KEY = 'comfy:resume-team-pricing'
 
-export type SubscriptionDialogReason =
-  | 'subscription_required'
-  | 'out_of_credits'
-  | 'top_up_blocked'
-  | 'deep_link'
-
-interface SubscriptionDialogOptions {
-  reason?: SubscriptionDialogReason
+export interface SubscriptionDialogOptions {
+  reason?: PaymentIntentSource
   /**
    * Forces the unified pricing dialog to open on a specific plan tab,
    * overriding the workspace-derived default (e.g. an "Upgrade to Team" CTA
@@ -38,6 +34,17 @@ export const useSubscriptionDialog = () => {
     dialogStore.closeDialog({ key: FREE_TIER_DIALOG_KEY })
   }
 
+  // Fired here — the choke point every paywall/pricing dialog variant passes
+  // through — so both the legacy and workspace billing paths emit it.
+  function trackModalOpened(reason?: PaymentIntentSource) {
+    // Resolved lazily to avoid the useBillingContext import cycle (see below).
+    const { tier } = useBillingContext()
+    useTelemetry()?.trackSubscription('modal_opened', {
+      current_tier: tier.value?.toLowerCase(),
+      reason
+    })
+  }
+
   function showPricingTable(options?: SubscriptionDialogOptions) {
     if (!isCloud) return
 
@@ -71,6 +78,8 @@ export const useSubscriptionDialog = () => {
       return
     }
 
+    trackModalOpened(options?.reason)
+
     // Shared dialog shell styling for both variants.
     const dialogComponentProps = {
       style: 'width: min(1328px, 95vw); max-height: 958px;',
@@ -167,6 +176,8 @@ export const useSubscriptionDialog = () => {
     // (not at composable setup) to avoid the useBillingContext import cycle.
     const { isFreeTier } = useBillingContext()
     if (isFreeTier.value && workspaceStore.isInPersonalWorkspace) {
+      trackModalOpened(options?.reason)
+
       const component = defineAsyncComponent(
         () =>
           import('@/platform/cloud/subscription/components/FreeTierDialogContent.vue')
@@ -236,7 +247,7 @@ export const useSubscriptionDialog = () => {
       sessionStorage.removeItem(RESUME_PRICING_KEY)
 
       if (!workspaceStore.isInPersonalWorkspace) {
-        showPricingTable()
+        showPricingTable({ reason: 'team_upgrade_resume' })
       }
     } catch {
       // sessionStorage may be unavailable

src/platform/cloud/subscription/utils/subscriptionCheckoutTracker.test.ts

@@ -0,0 +1,49 @@
+import { beforeEach, describe, expect, it } from 'vitest'
+
+import {
+  clearPendingSubscriptionCheckoutAttempt,
+  consumePendingSubscriptionCheckoutSuccess,
+  recordPendingSubscriptionCheckoutAttempt
+} from './subscriptionCheckoutTracker'
+
+const activeProStatus = {
+  is_active: true,
+  subscription_tier: 'PRO',
+  subscription_duration: 'MONTHLY'
+} as const
+
+describe('subscriptionCheckoutTracker', () => {
+  beforeEach(() => {
+    clearPendingSubscriptionCheckoutAttempt()
+  })
+
+  it('round-trips payment_intent_source from attempt to success metadata', () => {
+    recordPendingSubscriptionCheckoutAttempt({
+      tier: 'pro',
+      cycle: 'monthly',
+      checkout_type: 'new',
+      payment_intent_source: 'subscribe_to_run'
+    })
+
+    const metadata = consumePendingSubscriptionCheckoutSuccess(activeProStatus)
+
+    expect(metadata).toMatchObject({
+      tier: 'pro',
+      checkout_type: 'new',
+      payment_intent_source: 'subscribe_to_run'
+    })
+  })
+
+  it('omits payment_intent_source when the attempt had none', () => {
+    recordPendingSubscriptionCheckoutAttempt({
+      tier: 'pro',
+      cycle: 'monthly',
+      checkout_type: 'new'
+    })
+
+    const metadata = consumePendingSubscriptionCheckoutSuccess(activeProStatus)
+
+    expect(metadata).not.toBeNull()
+    expect(metadata).not.toHaveProperty('payment_intent_source')
+  })
+})

src/platform/cloud/subscription/utils/subscriptionCheckoutTracker.ts

@@ -7,7 +7,12 @@ import type {
   TierKey
 } from '@/platform/cloud/subscription/constants/tierPricing'
 import type { BillingCycle } from '@/platform/cloud/subscription/utils/subscriptionTierRank'
-import type { SubscriptionSuccessMetadata } from '@/platform/telemetry/types'
+import type {
+  BeginCheckoutMetadata,
+  PaymentIntentSource,
+  SubscriptionCheckoutType,
+  SubscriptionSuccessMetadata
+} from '@/platform/telemetry/types'
 
 const PENDING_SUBSCRIPTION_CHECKOUT_MAX_AGE_MS = 6 * 60 * 60 * 1000
 const VALID_TIER_KEYS = new Set<TierKey>([
@@ -23,7 +28,6 @@ export const PENDING_SUBSCRIPTION_CHECKOUT_STORAGE_KEY =
 export const PENDING_SUBSCRIPTION_CHECKOUT_EVENT =
   'comfy:subscription-checkout-attempt-changed'
 
-type CheckoutType = 'new' | 'change'
 type SubscriptionDuration = 'MONTHLY' | 'ANNUAL'
 
 interface SubscriptionStatusSnapshot {
@@ -32,22 +36,24 @@ interface SubscriptionStatusSnapshot {
   subscription_duration?: SubscriptionDuration | null
 }
 
-interface PendingSubscriptionCheckoutAttempt {
+export interface PendingSubscriptionCheckoutAttempt {
   attempt_id: string
   started_at_ms: number
   tier: TierKey
   cycle: BillingCycle
-  checkout_type: CheckoutType
+  checkout_type: SubscriptionCheckoutType
   previous_tier?: TierKey
   previous_cycle?: BillingCycle
+  payment_intent_source?: PaymentIntentSource
 }
 
-interface RecordPendingSubscriptionCheckoutAttemptInput {
+interface PendingSubscriptionCheckoutAttemptInput {
   tier: TierKey
   cycle: BillingCycle
-  checkout_type: CheckoutType
+  checkout_type: SubscriptionCheckoutType
   previous_tier?: TierKey
   previous_cycle?: BillingCycle
+  payment_intent_source?: PaymentIntentSource
 }
 
 const dispatchPendingCheckoutChangeEvent = () => {
@@ -168,6 +174,9 @@ const normalizeAttempt = (
     ...(candidate.previous_cycle === 'monthly' ||
     candidate.previous_cycle === 'yearly'
       ? { previous_cycle: candidate.previous_cycle }
+      : {}),
+    ...(typeof candidate.payment_intent_source === 'string'
+      ? { payment_intent_source: candidate.payment_intent_source }
       : {})
   }
 }
@@ -224,20 +233,27 @@ const getPendingSubscriptionCheckoutAttempt =
 export const hasPendingSubscriptionCheckoutAttempt = (): boolean =>
   getPendingSubscriptionCheckoutAttempt() !== null
 
-export const recordPendingSubscriptionCheckoutAttempt = (
-  input: RecordPendingSubscriptionCheckoutAttemptInput
+export const createPendingSubscriptionCheckoutAttempt = (
+  input: PendingSubscriptionCheckoutAttemptInput
 ): PendingSubscriptionCheckoutAttempt => {
-  const storage = getStorage()
-  const attempt: PendingSubscriptionCheckoutAttempt = {
+  return {
     attempt_id: createAttemptId(),
     started_at_ms: Date.now(),
     tier: input.tier,
     cycle: input.cycle,
     checkout_type: input.checkout_type,
     ...(input.previous_tier ? { previous_tier: input.previous_tier } : {}),
-    ...(input.previous_cycle ? { previous_cycle: input.previous_cycle } : {})
+    ...(input.previous_cycle ? { previous_cycle: input.previous_cycle } : {}),
+    ...(input.payment_intent_source
+      ? { payment_intent_source: input.payment_intent_source }
+      : {})
   }
+}
 
+export const persistPendingSubscriptionCheckoutAttempt = (
+  attempt: PendingSubscriptionCheckoutAttempt
+): PendingSubscriptionCheckoutAttempt => {
+  const storage = getStorage()
   if (!storage) {
     return attempt
   }
@@ -255,6 +271,21 @@ export const recordPendingSubscriptionCheckoutAttempt = (
   return attempt
 }
 
+export const recordPendingSubscriptionCheckoutAttempt = (
+  input: PendingSubscriptionCheckoutAttemptInput
+): PendingSubscriptionCheckoutAttempt =>
+  persistPendingSubscriptionCheckoutAttempt(
+    createPendingSubscriptionCheckoutAttempt(input)
+  )
+
+export const withPendingCheckoutAttemptId = (
+  metadata: BeginCheckoutMetadata,
+  attempt: PendingSubscriptionCheckoutAttempt
+): BeginCheckoutMetadata => ({
+  ...metadata,
+  checkout_attempt_id: attempt.attempt_id
+})
+
 const didAttemptSucceed = (
   attempt: PendingSubscriptionCheckoutAttempt,
   status: SubscriptionStatusSnapshot
@@ -287,6 +318,9 @@ export const consumePendingSubscriptionCheckoutSuccess = (
     cycle: attempt.cycle,
     checkout_type: attempt.checkout_type,
     ...(attempt.previous_tier ? { previous_tier: attempt.previous_tier } : {}),
+    ...(attempt.payment_intent_source
+      ? { payment_intent_source: attempt.payment_intent_source }
+      : {}),
     value,
     currency: 'USD',
     ecommerce: {

src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.test.ts

@@ -132,13 +132,14 @@ describe('performSubscriptionCheckout', () => {
       json: async () => ({ checkout_url: checkoutUrl })
     } as Response)
 
-    await performSubscriptionCheckout('pro', 'yearly', true)
+    await performSubscriptionCheckout('pro', 'yearly')
 
     expect(mockTelemetry.trackBeginCheckout).toHaveBeenCalledWith({
       user_id: 'user-123',
       tier: 'pro',
       cycle: 'yearly',
       checkout_type: 'new',
+      checkout_attempt_id: expect.any(String),
       ga_client_id: 'ga-client-id',
       ga_session_id: 'ga-session-id',
       ga_session_number: 'ga-session-number',
@@ -150,6 +151,12 @@ describe('performSubscriptionCheckout', () => {
       gbraid: 'gbraid-456',
       wbraid: 'wbraid-789'
     })
+    const beginCheckoutMetadata =
+      mockTelemetry.trackBeginCheckout.mock.calls[0][0]
+    const [, storedAttempt] = mockLocalStorage.setItem.mock.calls[0]
+    expect(beginCheckoutMetadata.checkout_attempt_id).toBe(
+      JSON.parse(storedAttempt).attempt_id
+    )
     expect(global.fetch).toHaveBeenCalledWith(
       expect.stringContaining(
         '/customers/cloud-subscription-checkout/pro-yearly'
@@ -186,7 +193,7 @@ describe('performSubscriptionCheckout', () => {
       json: async () => ({ checkout_url: checkoutUrl })
     } as Response)
 
-    await performSubscriptionCheckout('pro', 'monthly', true)
+    await performSubscriptionCheckout('pro', 'monthly')
 
     expect(warnSpy).toHaveBeenCalledWith(
       '[SubscriptionCheckout] Failed to collect checkout attribution',
@@ -203,11 +210,43 @@ describe('performSubscriptionCheckout', () => {
       user_id: 'user-123',
       tier: 'pro',
       cycle: 'monthly',
-      checkout_type: 'new'
+      checkout_type: 'new',
+      checkout_attempt_id: expect.any(String)
     })
     expect(openSpy).toHaveBeenCalledWith(checkoutUrl, '_blank')
   })
 
+  it('carries the payment intent source into begin_checkout and the pending attempt', async () => {
+    const checkoutUrl = 'https://checkout.stripe.com/test'
+    const openSpy = vi
+      .spyOn(window, 'open')
+      .mockImplementation(() => window as unknown as Window)
+
+    vi.mocked(global.fetch).mockResolvedValue({
+      ok: true,
+      json: async () => ({ checkout_url: checkoutUrl })
+    } as Response)
+
+    await performSubscriptionCheckout('pro', 'monthly', {
+      paymentIntentSource: 'out_of_credits'
+    })
+
+    expect(mockTelemetry.trackBeginCheckout).toHaveBeenCalledWith(
+      expect.objectContaining({ payment_intent_source: 'out_of_credits' })
+    )
+    const beginCheckoutMetadata =
+      mockTelemetry.trackBeginCheckout.mock.calls[0][0]
+    const [, storedAttempt] = mockLocalStorage.setItem.mock.calls[0]
+    const pendingAttempt = JSON.parse(storedAttempt)
+    expect(pendingAttempt).toMatchObject({
+      payment_intent_source: 'out_of_credits'
+    })
+    expect(beginCheckoutMetadata.checkout_attempt_id).toBe(
+      pendingAttempt.attempt_id
+    )
+    openSpy.mockRestore()
+  })
+
   it('uses the latest userId when it changes after checkout starts', async () => {
     const checkoutUrl = 'https://checkout.stripe.com/test'
     const openSpy = vi
@@ -222,7 +261,7 @@ describe('performSubscriptionCheckout', () => {
       json: async () => ({ checkout_url: checkoutUrl })
     } as Response)
 
-    const checkoutPromise = performSubscriptionCheckout('pro', 'yearly', true)
+    const checkoutPromise = performSubscriptionCheckout('pro', 'yearly')
 
     mockUserId.value = 'user-late'
     authHeader.resolve({ Authorization: 'Bearer test-token' })
@@ -235,13 +274,14 @@ describe('performSubscriptionCheckout', () => {
         user_id: 'user-late',
         tier: 'pro',
         cycle: 'yearly',
-        checkout_type: 'new'
+        checkout_type: 'new',
+        checkout_attempt_id: expect.any(String)
       })
     )
     expect(openSpy).toHaveBeenCalledWith(checkoutUrl, '_blank')
   })
 
-  it('does not persist a pending attempt when the checkout popup is blocked', async () => {
+  it('does not persist the pending attempt when the checkout popup is blocked', async () => {
     const checkoutUrl = 'https://checkout.stripe.com/test'
     const openSpy = vi.spyOn(window, 'open').mockImplementation(() => null)
 
@@ -250,11 +290,18 @@ describe('performSubscriptionCheckout', () => {
       json: async () => ({ checkout_url: checkoutUrl })
     } as Response)
 
-    await performSubscriptionCheckout('pro', 'monthly', true)
+    await performSubscriptionCheckout('pro', 'monthly')
 
     expect(openSpy).toHaveBeenCalledWith(checkoutUrl, '_blank')
-    expect(
-      window.localStorage.getItem(PENDING_SUBSCRIPTION_CHECKOUT_STORAGE_KEY)
-    ).toBeNull()
+    const storedAttempt = window.localStorage.getItem(
+      PENDING_SUBSCRIPTION_CHECKOUT_STORAGE_KEY
+    )
+    expect(storedAttempt).toBeNull()
+    expect(mockLocalStorage.setItem).not.toHaveBeenCalled()
+    expect(mockTelemetry.trackBeginCheckout).toHaveBeenCalledWith(
+      expect.objectContaining({
+        checkout_attempt_id: expect.any(String)
+      })
+    )
   })
 })

src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.ts

@@ -4,12 +4,19 @@ import { useFeatureFlags } from '@/composables/useFeatureFlags'
 import { getComfyApiBaseUrl } from '@/config/comfyApi'
 import { t } from '@/i18n'
 import { fetchWithUnifiedRemint } from '@/platform/auth/unified/remintRetry'
+import type { TierKey } from '@/platform/cloud/subscription/constants/tierPricing'
+import {
+  createPendingSubscriptionCheckoutAttempt,
+  persistPendingSubscriptionCheckoutAttempt,
+  withPendingCheckoutAttemptId
+} from '@/platform/cloud/subscription/utils/subscriptionCheckoutTracker'
 import { isCloud } from '@/platform/distribution/types'
 import { useTelemetry } from '@/platform/telemetry'
+import type {
+  CheckoutAttributionMetadata,
+  PaymentIntentSource
+} from '@/platform/telemetry/types'
 import { AuthStoreError, useAuthStore } from '@/stores/authStore'
-import type { CheckoutAttributionMetadata } from '@/platform/telemetry/types'
-import type { TierKey } from '@/platform/cloud/subscription/constants/tierPricing'
-import { recordPendingSubscriptionCheckoutAttempt } from '@/platform/cloud/subscription/utils/subscriptionCheckoutTracker'
 import type { BillingCycle } from './subscriptionTierRank'
 
 type CheckoutTier = TierKey | `${TierKey}-yearly`
@@ -31,6 +38,11 @@ const getCheckoutAttributionForCloud =
     return getCheckoutAttribution()
   }
 
+interface PerformSubscriptionCheckoutOptions {
+  openInNewTab?: boolean
+  paymentIntentSource?: PaymentIntentSource
+}
+
 /**
  * Core subscription checkout logic shared between PricingTable and
  * SubscriptionRedirectView. Handles:
@@ -47,10 +59,12 @@ const getCheckoutAttributionForCloud =
 export async function performSubscriptionCheckout(
   tierKey: TierKey,
   currentBillingCycle: BillingCycle,
-  openInNewTab: boolean = true
+  options: PerformSubscriptionCheckoutOptions = {}
 ): Promise<void> {
   if (!isCloud) return
 
+  const { openInNewTab = true, paymentIntentSource } = options
+
   const authStore = useAuthStore()
   const { userId } = storeToRefs(authStore)
   const telemetry = useTelemetry()
@@ -108,14 +122,29 @@ export async function performSubscriptionCheckout(
   const data = await response.json()
 
   if (data.checkout_url) {
+    const pendingAttempt = createPendingSubscriptionCheckoutAttempt({
+      tier: tierKey,
+      cycle: currentBillingCycle,
+      checkout_type: 'new',
+      payment_intent_source: paymentIntentSource
+    })
+
     if (userId.value) {
-      telemetry?.trackBeginCheckout({
-        user_id: userId.value,
-        tier: tierKey,
-        cycle: currentBillingCycle,
-        checkout_type: 'new',
-        ...checkoutAttribution
-      })
+      telemetry?.trackBeginCheckout(
+        withPendingCheckoutAttemptId(
+          {
+            user_id: userId.value,
+            tier: tierKey,
+            cycle: currentBillingCycle,
+            checkout_type: 'new',
+            ...(paymentIntentSource
+              ? { payment_intent_source: paymentIntentSource }
+              : {}),
+            ...checkoutAttribution
+          },
+          pendingAttempt
+        )
+      )
     }
 
     if (openInNewTab) {
@@ -123,18 +152,9 @@ export async function performSubscriptionCheckout(
       if (!checkoutWindow) {
         return
       }
-
-      recordPendingSubscriptionCheckoutAttempt({
-        tier: tierKey,
-        cycle: currentBillingCycle,
-        checkout_type: 'new'
-      })
+      persistPendingSubscriptionCheckoutAttempt(pendingAttempt)
     } else {
-      recordPendingSubscriptionCheckoutAttempt({
-        tier: tierKey,
-        cycle: currentBillingCycle,
-        checkout_type: 'new'
-      })
+      persistPendingSubscriptionCheckoutAttempt(pendingAttempt)
       globalThis.location.href = data.checkout_url
     }
   }

src/platform/cloud/subscription/utils/teamSubscriptionCheckoutUtil.test.ts

@@ -1,9 +1,13 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { computed, reactive } from 'vue'
 
-const { mockIsCloud, mockSubscribe } = vi.hoisted(() => ({
-  mockIsCloud: { value: true },
-  mockSubscribe: vi.fn()
-}))
+const { mockIsCloud, mockSubscribe, mockTrackBeginCheckout, mockUserId } =
+  vi.hoisted(() => ({
+    mockIsCloud: { value: true },
+    mockSubscribe: vi.fn(),
+    mockTrackBeginCheckout: vi.fn(),
+    mockUserId: { value: 'user-1' as string | null }
+  }))
 
 vi.mock('@/platform/distribution/types', () => ({
   get isCloud() {
@@ -16,6 +20,12 @@ vi.mock('@/config/comfyApi', () => ({
 vi.mock('@/platform/workspace/api/workspaceApi', () => ({
   workspaceApi: { subscribe: mockSubscribe }
 }))
+vi.mock('@/platform/telemetry', () => ({
+  useTelemetry: () => ({ trackBeginCheckout: mockTrackBeginCheckout })
+}))
+vi.mock('@/stores/authStore', () => ({
+  useAuthStore: () => reactive({ userId: computed(() => mockUserId.value) })
+}))
 
 import { performTeamSubscriptionCheckout } from './teamSubscriptionCheckoutUtil'
 
@@ -43,7 +53,9 @@ describe('performTeamSubscriptionCheckout', () => {
       billing_op_id: 'op_1'
     })
 
-    await performTeamSubscriptionCheckout('team_700', 'yearly')
+    await performTeamSubscriptionCheckout('team_700', 'yearly', {
+      paymentIntentSource: 'deep_link'
+    })
 
     expect(mockSubscribe).toHaveBeenCalledWith('team_per_credit_annual', {
       returnUrl: 'https://app.test/payment/success',
@@ -51,6 +63,14 @@ describe('performTeamSubscriptionCheckout', () => {
       teamCreditStopId: 'team_700'
     })
     expect(assignedHref).toBe('https://stripe.test/pay')
+    expect(mockTrackBeginCheckout).toHaveBeenCalledWith({
+      user_id: 'user-1',
+      tier: 'team',
+      cycle: 'yearly',
+      checkout_type: 'new',
+      billing_op_id: 'op_1',
+      payment_intent_source: 'deep_link'
+    })
   })
 
   it('uses the monthly slug and lands in the app when no Stripe step is needed', async () => {
@@ -82,6 +102,16 @@ describe('performTeamSubscriptionCheckout', () => {
     expect(assignedHref).toBeUndefined()
   })
 
+  it('does not track begin_checkout when subscribe fails', async () => {
+    mockSubscribe.mockRejectedValueOnce(new Error('subscribe failed'))
+
+    await expect(
+      performTeamSubscriptionCheckout('team_700', 'yearly')
+    ).rejects.toThrow('subscribe failed')
+
+    expect(mockTrackBeginCheckout).not.toHaveBeenCalled()
+  })
+
   it('does nothing off cloud', async () => {
     mockIsCloud.value = false
 

src/platform/cloud/subscription/utils/teamSubscriptionCheckoutUtil.ts

@@ -1,10 +1,16 @@
 import { getComfyPlatformBaseUrl } from '@/config/comfyApi'
 import { getTeamPlanSlug } from '@/platform/cloud/subscription/constants/teamPlanCreditStops'
 import { isCloud } from '@/platform/distribution/types'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 import { workspaceApi } from '@/platform/workspace/api/workspaceApi'
+import { trackWorkspaceCheckoutStarted } from '@/platform/workspace/utils/workspaceCheckoutTelemetry'
 
 import type { BillingCycle } from './subscriptionTierRank'
 
+interface PerformTeamSubscriptionCheckoutOptions {
+  paymentIntentSource?: PaymentIntentSource
+}
+
 /**
  * Direct team-plan checkout for the marketing `/cloud/subscribe?tier=team` deep
  * link: subscribes to the per-credit Team plan at the chosen slider stop and
@@ -22,7 +28,8 @@ import type { BillingCycle } from './subscriptionTierRank'
  */
 export async function performTeamSubscriptionCheckout(
   teamCreditStopId: string,
-  billingCycle: BillingCycle
+  billingCycle: BillingCycle,
+  options: PerformTeamSubscriptionCheckoutOptions = {}
 ): Promise<void> {
   if (!isCloud) return
 
@@ -33,6 +40,14 @@ export async function performTeamSubscriptionCheckout(
     teamCreditStopId
   })
 
+  trackWorkspaceCheckoutStarted({
+    tier: 'team',
+    cycle: billingCycle,
+    checkoutType: 'new',
+    billingOpId: response.billing_op_id,
+    paymentIntentSource: options.paymentIntentSource
+  })
+
   if (response.status === 'needs_payment_method') {
     // A needs_payment_method response without a URL is unusable: surface it to
     // the caller's error handling rather than silently dropping the user home

src/platform/telemetry/TelemetryRegistry.test.ts

@@ -30,6 +30,39 @@ describe('TelemetryRegistry', () => {
     expect(b.trackSearchQuery).toHaveBeenCalledExactlyOnceWith(payload)
   })
 
+  it('dispatches trackBeginCheckout with intent metadata to every provider', () => {
+    const a: TelemetryProvider = { trackBeginCheckout: vi.fn() }
+    const b: TelemetryProvider = {}
+    const registry = new TelemetryRegistry()
+    registry.registerProvider(a)
+    registry.registerProvider(b)
+
+    const metadata = {
+      user_id: 'user-1',
+      tier: 'pro' as const,
+      cycle: 'monthly' as const,
+      checkout_type: 'new' as const,
+      payment_intent_source: 'subscribe_to_run' as const
+    }
+    registry.trackBeginCheckout(metadata)
+
+    expect(a.trackBeginCheckout).toHaveBeenCalledExactlyOnceWith(metadata)
+  })
+
+  it('dispatches trackAddApiCreditButtonClicked with its source', () => {
+    const provider: TelemetryProvider = {
+      trackAddApiCreditButtonClicked: vi.fn()
+    }
+    const registry = new TelemetryRegistry()
+    registry.registerProvider(provider)
+
+    registry.trackAddApiCreditButtonClicked({ source: 'credits_panel' })
+
+    expect(
+      provider.trackAddApiCreditButtonClicked
+    ).toHaveBeenCalledExactlyOnceWith({ source: 'credits_panel' })
+  })
+
   it('skips providers that do not implement trackSearchQuery', () => {
     const empty: TelemetryProvider = {}
     const registry = new TelemetryRegistry()

src/platform/telemetry/TelemetryRegistry.ts

@@ -1,6 +1,7 @@
 import type { AuditLog } from '@/services/customerEventsService'
 
 import type {
+  AddCreditsClickMetadata,
   AuthMetadata,
   BeginCheckoutMetadata,
   DefaultViewSetMetadata,
@@ -99,8 +100,10 @@ export class TelemetryRegistry implements TelemetryDispatcher {
     this.dispatch((provider) => provider.trackMonthlySubscriptionCancelled?.())
   }
 
-  trackAddApiCreditButtonClicked(): void {
-    this.dispatch((provider) => provider.trackAddApiCreditButtonClicked?.())
+  trackAddApiCreditButtonClicked(metadata?: AddCreditsClickMetadata): void {
+    this.dispatch((provider) =>
+      provider.trackAddApiCreditButtonClicked?.(metadata)
+    )
   }
 
   trackApiCreditTopupButtonPurchaseClicked(amount: number): void {

src/platform/telemetry/providers/cloud/PostHogTelemetryProvider.test.ts

@@ -313,6 +313,42 @@ describe('PostHogTelemetryProvider', () => {
       )
     })
 
+    it('captures begin_checkout with intent metadata', async () => {
+      const provider = createProvider()
+      await vi.dynamicImportSettled()
+
+      provider.trackBeginCheckout({
+        user_id: 'user-1',
+        tier: 'pro',
+        cycle: 'monthly',
+        checkout_type: 'new',
+        payment_intent_source: 'subscribe_to_run'
+      })
+
+      expect(hoisted.mockCapture).toHaveBeenCalledWith(
+        TelemetryEvents.BEGIN_CHECKOUT,
+        {
+          user_id: 'user-1',
+          tier: 'pro',
+          cycle: 'monthly',
+          checkout_type: 'new',
+          payment_intent_source: 'subscribe_to_run'
+        }
+      )
+    })
+
+    it('captures add-credit clicks with their source', async () => {
+      const provider = createProvider()
+      await vi.dynamicImportSettled()
+
+      provider.trackAddApiCreditButtonClicked({ source: 'credits_panel' })
+
+      expect(hoisted.mockCapture).toHaveBeenCalledWith(
+        TelemetryEvents.ADD_API_CREDIT_BUTTON_CLICKED,
+        { source: 'credits_panel' }
+      )
+    })
+
     it('captures share attribution events', async () => {
       const provider = createProvider()
       await vi.dynamicImportSettled()

src/platform/telemetry/providers/cloud/PostHogTelemetryProvider.ts

@@ -10,7 +10,9 @@ import { remoteConfig } from '@/platform/remoteConfig/remoteConfig'
 import type { RemoteConfig } from '@/platform/remoteConfig/types'
 
 import type {
+  AddCreditsClickMetadata,
   AuthMetadata,
+  BeginCheckoutMetadata,
   DefaultViewSetMetadata,
   EnterLinearMetadata,
   ShareFlowMetadata,
@@ -350,8 +352,12 @@ export class PostHogTelemetryProvider implements TelemetryProvider {
     this.trackEvent(eventName, metadata)
   }
 
-  trackAddApiCreditButtonClicked(): void {
-    this.trackEvent(TelemetryEvents.ADD_API_CREDIT_BUTTON_CLICKED)
+  trackAddApiCreditButtonClicked(metadata?: AddCreditsClickMetadata): void {
+    this.trackEvent(TelemetryEvents.ADD_API_CREDIT_BUTTON_CLICKED, metadata)
+  }
+
+  trackBeginCheckout(metadata: BeginCheckoutMetadata): void {
+    this.trackEvent(TelemetryEvents.BEGIN_CHECKOUT, metadata)
   }
 
   trackMonthlySubscriptionSucceeded(

src/platform/telemetry/providers/host/HostTelemetrySink.test.ts

@@ -115,6 +115,17 @@ describe('HostTelemetrySink', () => {
     )
   })
 
+  it('forwards add-credit clicks with their source', () => {
+    new HostTelemetrySink().trackAddApiCreditButtonClicked({
+      source: 'avatar_menu'
+    })
+
+    expect(state.capture).toHaveBeenCalledExactlyOnceWith(
+      TelemetryEvents.ADD_API_CREDIT_BUTTON_CLICKED,
+      { source: 'avatar_menu' }
+    )
+  })
+
   it('does nothing when the host bridge is absent', () => {
     delete window.__comfyDesktop2
 

src/platform/telemetry/providers/host/HostTelemetrySink.ts

@@ -10,6 +10,7 @@ import {
 import type { AuditLog } from '@/services/customerEventsService'
 
 import type {
+  AddCreditsClickMetadata,
   AuthMetadata,
   BeginCheckoutMetadata,
   DefaultViewSetMetadata,
@@ -126,8 +127,8 @@ export class HostTelemetrySink implements TelemetryProvider {
     this.capture(TelemetryEvents.MONTHLY_SUBSCRIPTION_CANCELLED)
   }
 
-  trackAddApiCreditButtonClicked(): void {
-    this.capture(TelemetryEvents.ADD_API_CREDIT_BUTTON_CLICKED)
+  trackAddApiCreditButtonClicked(metadata?: AddCreditsClickMetadata): void {
+    this.capture(TelemetryEvents.ADD_API_CREDIT_BUTTON_CLICKED, metadata)
   }
 
   trackApiCreditTopupButtonPurchaseClicked(amount: number): void {

src/platform/telemetry/types.ts

@@ -12,12 +12,29 @@
  * 3. Check dist/assets/*.js files contain no tracking code
  */
 
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type { TierKey } from '@/platform/cloud/subscription/constants/tierPricing'
 import type { BillingCycle } from '@/platform/cloud/subscription/utils/subscriptionTierRank'
 import type { AuditLog } from '@/services/customerEventsService'
 import type { AppMode } from '@/utils/appMode'
 
+export type PaymentIntentSource =
+  | 'subscription_required'
+  | 'out_of_credits'
+  | 'top_up_blocked'
+  | 'deep_link'
+  | 'subscribe_to_run'
+  | 'subscribe_now_button'
+  | 'upgrade_to_add_credits'
+  | 'settings_billing_panel'
+  | 'avatar_menu_plans'
+  | 'team_members_panel'
+  | 'invite_member_upsell'
+  | 'upload_model_upgrade'
+  | 'team_upgrade_resume'
+
+export type SubscriptionCheckoutType = 'new' | 'change'
+export type SubscriptionCheckoutTier = TierKey | 'team'
+
 /**
  * Authentication metadata for sign-up tracking
  */
@@ -426,16 +443,23 @@ export interface CheckoutAttributionMetadata {
 
 export interface SubscriptionMetadata {
   current_tier?: string
-  reason?: SubscriptionDialogReason
+  reason?: PaymentIntentSource
+}
+
+export interface AddCreditsClickMetadata {
+  source: 'credits_panel' | 'avatar_menu' | 'settings_billing_panel'
 }
 
 export interface BeginCheckoutMetadata
   extends Record<string, unknown>, CheckoutAttributionMetadata {
   user_id: string
-  tier: TierKey
+  tier: SubscriptionCheckoutTier
   cycle: BillingCycle
-  checkout_type: 'new' | 'change'
+  checkout_type: SubscriptionCheckoutType
+  checkout_attempt_id?: string
+  billing_op_id?: string
   previous_tier?: TierKey
+  payment_intent_source?: PaymentIntentSource
 }
 
 interface EcommerceItemMetadata {
@@ -457,8 +481,9 @@ export interface SubscriptionSuccessMetadata extends Record<string, unknown> {
   checkout_attempt_id: string
   tier: TierKey
   cycle: BillingCycle
-  checkout_type: 'new' | 'change'
+  checkout_type: SubscriptionCheckoutType
   previous_tier?: TierKey
+  payment_intent_source?: PaymentIntentSource
   value: number
   currency: string
   ecommerce: EcommerceMetadata
@@ -489,7 +514,7 @@ export interface TelemetryProvider {
     metadata?: SubscriptionSuccessMetadata
   ): void
   trackMonthlySubscriptionCancelled?(): void
-  trackAddApiCreditButtonClicked?(): void
+  trackAddApiCreditButtonClicked?(metadata?: AddCreditsClickMetadata): void
   trackApiCreditTopupButtonPurchaseClicked?(amount: number): void
   trackApiCreditTopupSucceeded?(): void
   trackWorkspaceInviteSent?(metadata: WorkspaceInviteMetadata): void

src/platform/workspace/components/CurrentUserPopoverWorkspace.vue

@@ -321,7 +321,7 @@ const handleOpenWorkspaceSettings = () => {
 }
 
 const handleOpenPlansAndPricing = () => {
-  subscriptionDialog.showPricingTable()
+  subscriptionDialog.showPricingTable({ reason: 'avatar_menu_plans' })
   emit('close')
 }
 
@@ -336,13 +336,12 @@ const handleOpenPlanAndCreditsSettings = () => {
 }
 
 const handleUpgradeToAddCredits = () => {
-  subscriptionDialog.showPricingTable()
+  subscriptionDialog.showPricingTable({ reason: 'upgrade_to_add_credits' })
   emit('close')
 }
 
 const handleTopUp = () => {
-  // Track purchase credits entry from avatar popover
-  useTelemetry()?.trackAddApiCreditButtonClicked()
+  useTelemetry()?.trackAddApiCreditButtonClicked({ source: 'avatar_menu' })
   dialogService.showTopUpCreditsDialog()
   emit('close')
 }

src/platform/workspace/components/SubscriptionPanelContentWorkspace.vue

@@ -391,12 +391,13 @@ const showZeroState = computed(
 )
 
 function handleSubscribeWorkspace() {
-  showSubscriptionDialog()
+  showSubscriptionDialog({ reason: 'settings_billing_panel' })
 }
 
 function handleUpgrade() {
-  if (isFreeTierPlan.value) showPricingTable()
-  else showSubscriptionDialog()
+  if (isFreeTierPlan.value)
+    showPricingTable({ reason: 'settings_billing_panel' })
+  else showSubscriptionDialog({ reason: 'settings_billing_panel' })
 }
 
 function handleViewMoreDetails() {

src/platform/workspace/components/SubscriptionRequiredDialogContentUnified.vue

@@ -113,7 +113,7 @@ import { cn } from '@comfyorg/tailwind-utils'
 import { useEventListener } from '@vueuse/core'
 
 import Button from '@/components/ui/button/Button.vue'
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 import { useSubscriptionCheckout } from '@/platform/workspace/composables/useSubscriptionCheckout'
 
 import SubscriptionAddPaymentPreviewWorkspace from './SubscriptionAddPaymentPreviewWorkspace.vue'
@@ -123,7 +123,7 @@ import UnifiedPricingTable from './UnifiedPricingTable.vue'
 
 const { onClose, reason, initialPlanMode } = defineProps<{
   onClose: () => void
-  reason?: SubscriptionDialogReason
+  reason?: PaymentIntentSource
   initialPlanMode?: 'personal' | 'team'
 }>()
 
@@ -152,7 +152,7 @@ const {
   handleConfirmTransition,
   handleTeamSubscribe,
   handleResubscribe
-} = useSubscriptionCheckout(emit)
+} = useSubscriptionCheckout(emit, reason)
 
 // Backspace mirrors the back arrow on the confirm step, but never while an
 // editable element is focused (let it delete text there).

src/platform/workspace/components/SubscriptionRequiredDialogContentWorkspace.test.ts

@@ -5,7 +5,7 @@ import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { ref } from 'vue'
 import { createI18n } from 'vue-i18n'
 
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 
 import SubscriptionRequiredDialogContentWorkspace from './SubscriptionRequiredDialogContentWorkspace.vue'
 
@@ -17,25 +17,10 @@ const mockHandleResubscribe = vi.fn()
 const mockHandleSuccessClose = vi.fn()
 const mockCheckoutStep = ref<'pricing' | 'preview' | 'success'>('pricing')
 const mockPreviewData = ref<{ transition_type: string } | null>(null)
+const mockUseSubscriptionCheckout = vi.hoisted(() => vi.fn())
 
 vi.mock('@/platform/workspace/composables/useSubscriptionCheckout', () => ({
-  useSubscriptionCheckout: () => ({
-    checkoutStep: mockCheckoutStep,
-    isLoadingPreview: ref(false),
-    loadingTier: ref(null),
-    isSubscribing: ref(false),
-    isResubscribing: ref(false),
-    previewData: mockPreviewData,
-    selectedTierKey: ref('standard'),
-    selectedBillingCycle: ref('yearly'),
-    isPolling: ref(false),
-    handleSubscribeClick: mockHandleSubscribeClick,
-    handleBackToPricing: mockHandleBackToPricing,
-    handleAddCreditCard: mockHandleAddCreditCard,
-    handleConfirmTransition: mockHandleConfirmTransition,
-    handleResubscribe: mockHandleResubscribe,
-    handleSuccessClose: mockHandleSuccessClose
-  })
+  useSubscriptionCheckout: mockUseSubscriptionCheckout
 }))
 
 const i18n = createI18n({
@@ -91,7 +76,7 @@ const SuccessStub = {
 function renderComponent(
   props: {
     onClose?: () => void
-    reason?: SubscriptionDialogReason
+    reason?: PaymentIntentSource
     isPersonal?: boolean
   } = {}
 ) {
@@ -121,6 +106,23 @@ function renderComponent(
 describe('SubscriptionRequiredDialogContentWorkspace', () => {
   beforeEach(() => {
     vi.clearAllMocks()
+    mockUseSubscriptionCheckout.mockReturnValue({
+      checkoutStep: mockCheckoutStep,
+      isLoadingPreview: ref(false),
+      loadingTier: ref(null),
+      isSubscribing: ref(false),
+      isResubscribing: ref(false),
+      previewData: mockPreviewData,
+      selectedTierKey: ref('standard'),
+      selectedBillingCycle: ref('yearly'),
+      isPolling: ref(false),
+      handleSubscribeClick: mockHandleSubscribeClick,
+      handleBackToPricing: mockHandleBackToPricing,
+      handleAddCreditCard: mockHandleAddCreditCard,
+      handleConfirmTransition: mockHandleConfirmTransition,
+      handleResubscribe: mockHandleResubscribe,
+      handleSuccessClose: mockHandleSuccessClose
+    })
     mockCheckoutStep.value = 'pricing'
     mockPreviewData.value = null
   })
@@ -132,6 +134,15 @@ describe('SubscriptionRequiredDialogContentWorkspace', () => {
     expect(screen.queryByTestId('transition-preview')).not.toBeInTheDocument()
   })
 
+  it('passes the reason into subscription checkout', () => {
+    renderComponent({ reason: 'out_of_credits' })
+
+    expect(mockUseSubscriptionCheckout).toHaveBeenCalledWith(
+      expect.any(Function),
+      'out_of_credits'
+    )
+  })
+
   it('shows the team workspace header by default', () => {
     renderComponent()
     expect(screen.getByText('Team Workspace')).toBeInTheDocument()

src/platform/workspace/components/SubscriptionRequiredDialogContentWorkspace.vue

@@ -116,7 +116,7 @@
 import { cn } from '@comfyorg/tailwind-utils'
 
 import Button from '@/components/ui/button/Button.vue'
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 import { useSubscriptionCheckout } from '@/platform/workspace/composables/useSubscriptionCheckout'
 
 import PricingTableWorkspace from './PricingTableWorkspace.vue'
@@ -130,7 +130,7 @@ const {
   isPersonal = false
 } = defineProps<{
   onClose: () => void
-  reason?: SubscriptionDialogReason
+  reason?: PaymentIntentSource
   isPersonal?: boolean
 }>()
 
@@ -154,7 +154,7 @@ const {
   handleConfirmTransition,
   handleResubscribe,
   handleSuccessClose
-} = useSubscriptionCheckout(emit)
+} = useSubscriptionCheckout(emit, reason)
 </script>
 
 <style scoped>

src/platform/workspace/components/dialogs/InviteMemberUpsellDialogContent.vue

@@ -61,6 +61,9 @@ function onDismiss() {
 
 function onUpgrade() {
   dialogStore.closeDialog({ key: 'invite-member-upsell' })
-  subscriptionDialog.show({ planMode: 'team' })
+  subscriptionDialog.show({
+    planMode: 'team',
+    reason: 'invite_member_upsell'
+  })
 }
 </script>

src/platform/workspace/composables/useMembersPanel.ts

@@ -277,7 +277,7 @@ export function useMembersPanel() {
   }
 
   function showTeamPlans() {
-    subscriptionDialog.show({ planMode: 'team' })
+    subscriptionDialog.show({ planMode: 'team', reason: 'team_members_panel' })
   }
 
   return {

src/platform/workspace/composables/useSubscriptionCheckout.test.ts

@@ -1,8 +1,9 @@
 import { createTestingPinia } from '@pinia/testing'
 import { setActivePinia } from 'pinia'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import { computed } from 'vue'
+import { computed, reactive } from 'vue'
 
+import type { PaymentIntentSource } from '@/platform/telemetry/types'
 import type { Plan } from '@/platform/workspace/api/workspaceApi'
 
 import { findPlanSlug } from './useSubscriptionCheckout'
@@ -75,7 +76,9 @@ const {
   mockPlans,
   mockResubscribe,
   mockToastAdd,
-  mockStartOperation
+  mockStartOperation,
+  mockTrackBeginCheckout,
+  mockUserId
 } = vi.hoisted(() => ({
   mockSubscribe: vi.fn(),
   mockPreviewSubscribe: vi.fn(),
@@ -84,7 +87,9 @@ const {
   mockPlans: { value: [] as Plan[] },
   mockResubscribe: vi.fn(),
   mockToastAdd: vi.fn(),
-  mockStartOperation: vi.fn()
+  mockStartOperation: vi.fn(),
+  mockTrackBeginCheckout: vi.fn(),
+  mockUserId: { value: 'user-1' as string | null }
 }))
 
 vi.mock('@/composables/billing/useBillingContext', () => ({
@@ -119,7 +124,14 @@ vi.mock('primevue/usetoast', () => ({
 }))
 
 vi.mock('@/platform/telemetry', () => ({
-  useTelemetry: () => ({ trackMonthlySubscriptionSucceeded: vi.fn() })
+  useTelemetry: () => ({
+    trackMonthlySubscriptionSucceeded: vi.fn(),
+    trackBeginCheckout: mockTrackBeginCheckout
+  })
+}))
+
+vi.mock('@/stores/authStore', () => ({
+  useAuthStore: () => reactive({ userId: computed(() => mockUserId.value) })
 }))
 
 vi.mock('vue-i18n', async (importOriginal) => {
@@ -135,10 +147,10 @@ vi.mock('vue-i18n', async (importOriginal) => {
 describe('useSubscriptionCheckout', () => {
   let emit: ReturnType<typeof vi.fn>
 
-  async function setup() {
+  async function setup(paymentIntentSource?: PaymentIntentSource) {
     const { useSubscriptionCheckout } =
       await import('./useSubscriptionCheckout')
-    return useSubscriptionCheckout(emit as never)
+    return useSubscriptionCheckout(emit as never, paymentIntentSource)
   }
 
   beforeEach(() => {
@@ -146,6 +158,7 @@ describe('useSubscriptionCheckout', () => {
     vi.clearAllMocks()
     mockPlans.value = allPlans()
     mockStartOperation.mockResolvedValue({ status: 'succeeded' })
+    mockUserId.value = 'user-1'
     emit = vi.fn()
   })
 
@@ -459,6 +472,13 @@ describe('useSubscriptionCheckout', () => {
         cancelUrl: 'https://platform.comfy.org/payment/failed'
       })
       expect(checkout.checkoutStep.value).toBe('success')
+      expect(mockTrackBeginCheckout).toHaveBeenCalledWith(
+        expect.objectContaining({
+          tier: 'team',
+          checkout_type: 'new',
+          billing_op_id: 'op-team-1'
+        })
+      )
     })
 
     it('uses the annual plan slug for the yearly cycle', async () => {
@@ -553,6 +573,39 @@ describe('useSubscriptionCheckout', () => {
           detail: 'Team payment failed'
         })
       )
+      expect(mockTrackBeginCheckout).not.toHaveBeenCalled()
+    })
+
+    it('keeps team checkout_type as change when the preview request fails', async () => {
+      const checkout = await setup()
+      mockPreviewSubscribe.mockRejectedValueOnce(new Error('not supported'))
+      await checkout.handleSubscribeTeamClick({
+        stop: {
+          id: 'team_1400',
+          usd: 1400,
+          credits: 295_400,
+          discountedUsd: 1295
+        },
+        billingCycle: 'monthly',
+        isChange: true
+      })
+      mockSubscribe.mockResolvedValueOnce({
+        status: 'subscribed',
+        billing_op_id: 'op-team-change'
+      })
+      mockFetchStatus.mockResolvedValueOnce(undefined)
+      mockFetchBalance.mockResolvedValueOnce(undefined)
+
+      await checkout.handleTeamSubscribe()
+
+      expect(mockTrackBeginCheckout).toHaveBeenCalledWith(
+        expect.objectContaining({
+          tier: 'team',
+          cycle: 'monthly',
+          checkout_type: 'change',
+          billing_op_id: 'op-team-change'
+        })
+      )
     })
   })
 
@@ -603,6 +656,47 @@ describe('useSubscriptionCheckout', () => {
       expect(checkout.checkoutStep.value).toBe('success')
     })
 
+    it('skips begin_checkout when no user id is available', async () => {
+      mockUserId.value = null
+      const checkout = await setup('subscribe_to_run')
+      checkout.selectedTierKey.value = 'standard'
+      checkout.selectedBillingCycle.value = 'yearly'
+      mockSubscribe.mockResolvedValueOnce({
+        status: 'subscribed',
+        billing_op_id: 'op-1'
+      })
+      mockFetchStatus.mockResolvedValueOnce(undefined)
+      mockFetchBalance.mockResolvedValueOnce(undefined)
+
+      await checkout.handleAddCreditCard()
+
+      expect(mockTrackBeginCheckout).not.toHaveBeenCalled()
+      mockUserId.value = 'user-1'
+    })
+
+    it('fires begin_checkout carrying the payment intent source', async () => {
+      const checkout = await setup('subscribe_to_run')
+      checkout.selectedTierKey.value = 'standard'
+      checkout.selectedBillingCycle.value = 'yearly'
+      mockSubscribe.mockResolvedValueOnce({
+        status: 'subscribed',
+        billing_op_id: 'op-1'
+      })
+      mockFetchStatus.mockResolvedValueOnce(undefined)
+      mockFetchBalance.mockResolvedValueOnce(undefined)
+
+      await checkout.handleAddCreditCard()
+
+      expect(mockTrackBeginCheckout).toHaveBeenCalledWith({
+        user_id: 'user-1',
+        tier: 'standard',
+        cycle: 'yearly',
+        checkout_type: 'new',
+        billing_op_id: 'op-1',
+        payment_intent_source: 'subscribe_to_run'
+      })
+    })
+
     it('opens payment URL when needs_payment_method', async () => {
       const checkout = await setup()
       checkout.selectedTierKey.value = 'standard'
@@ -720,6 +814,7 @@ describe('useSubscriptionCheckout', () => {
           detail: 'Payment failed'
         })
       )
+      expect(mockTrackBeginCheckout).not.toHaveBeenCalled()
     })
   })
 

src/platform/workspace/composables/useSubscriptionCheckout.ts

@@ -9,16 +9,26 @@ import type { TeamPlanSelection } from '@/platform/cloud/subscription/constants/
 import type { TierKey } from '@/platform/cloud/subscription/constants/tierPricing'
 import type { BillingCycle } from '@/platform/cloud/subscription/utils/subscriptionTierRank'
 import { useTelemetry } from '@/platform/telemetry'
+import type {
+  PaymentIntentSource,
+  SubscriptionCheckoutType
+} from '@/platform/telemetry/types'
 import type {
   Plan,
   PreviewSubscribeResponse,
   SubscribeResponse
 } from '@/platform/workspace/api/workspaceApi'
 import { useBillingOperationStore } from '@/platform/workspace/stores/billingOperationStore'
+import { trackWorkspaceCheckoutStarted } from '@/platform/workspace/utils/workspaceCheckoutTelemetry'
 
 type CheckoutStep = 'pricing' | 'preview' | 'success'
 type CheckoutTierKey = Exclude<TierKey, 'free' | 'founder'>
 
+interface SelectedTeamCheckout {
+  stop: TeamPlanSelection
+  checkoutType: SubscriptionCheckoutType
+}
+
 /**
  * Which screen the `preview` step shows. Only a change prorates: a team change
  * carries `previewData` (handleSubscribeTeamClick sets it solely for an immediate
@@ -45,9 +55,12 @@ export function findPlanSlug(
   return plan?.slug ?? null
 }
 
-export function useSubscriptionCheckout(emit: {
-  (e: 'close', subscribed: boolean): void
-}) {
+export function useSubscriptionCheckout(
+  emit: {
+    (e: 'close', subscribed: boolean): void
+  },
+  paymentIntentSource?: PaymentIntentSource
+) {
   const { t } = useI18n()
   const toast = useToast()
   const {
@@ -68,13 +81,16 @@ export function useSubscriptionCheckout(emit: {
   const isResubscribing = ref(false)
   const previewData = ref<PreviewSubscribeResponse | null>(null)
   const selectedTierKey = ref<CheckoutTierKey | null>(null)
-  const selectedTeamStop = ref<TeamPlanSelection | null>(null)
+  const selectedTeamCheckout = ref<SelectedTeamCheckout | null>(null)
   const selectedBillingCycle = ref<BillingCycle>('yearly')
   const isPolling = computed(() => billingOperationStore.hasPendingOperations)
-  const isTeamCheckout = computed(() => selectedTeamStop.value !== null)
+  const selectedTeamStop = computed(
+    () => selectedTeamCheckout.value?.stop ?? null
+  )
+  const isTeamCheckout = computed(() => selectedTeamCheckout.value !== null)
 
   const previewVariant = computed<PreviewVariant>(() => {
-    if (selectedTeamStop.value) {
+    if (selectedTeamCheckout.value) {
       return previewData.value ? 'team-change' : 'team-new'
     }
     if (previewData.value) {
@@ -154,7 +170,10 @@ export function useSubscriptionCheckout(emit: {
     billingCycle: BillingCycle
     isChange?: boolean
   }) {
-    selectedTeamStop.value = payload.stop
+    selectedTeamCheckout.value = {
+      stop: payload.stop,
+      checkoutType: payload.isChange ? 'change' : 'new'
+    }
     selectedBillingCycle.value = payload.billingCycle
     selectedTierKey.value = null
     previewData.value = null
@@ -182,7 +201,7 @@ export function useSubscriptionCheckout(emit: {
   function handleBackToPricing() {
     checkoutStep.value = 'pricing'
     previewData.value = null
-    selectedTeamStop.value = null
+    selectedTeamCheckout.value = null
   }
 
   function handleSuccessClose() {
@@ -190,20 +209,34 @@ export function useSubscriptionCheckout(emit: {
   }
 
   async function handleSubscription() {
-    if (!selectedTierKey.value) return
+    const tierKey = selectedTierKey.value
+    if (!tierKey) return
+
+    const billingCycle = selectedBillingCycle.value
+    const checkoutType =
+      previewData.value &&
+      previewData.value.transition_type !== 'new_subscription'
+        ? 'change'
+        : 'new'
 
     isSubscribing.value = true
     try {
-      const planSlug = getApiPlanSlug(
-        selectedTierKey.value,
-        selectedBillingCycle.value
-      )
+      const planSlug = getApiPlanSlug(tierKey, billingCycle)
       if (!planSlug) return
       const response = await subscribe(planSlug, {
         returnUrl: `${getComfyPlatformBaseUrl()}/payment/success`,
         cancelUrl: `${getComfyPlatformBaseUrl()}/payment/failed`
       })
 
+      if (response) {
+        trackWorkspaceCheckoutStarted({
+          tier: tierKey,
+          cycle: billingCycle,
+          checkoutType,
+          billingOpId: response.billing_op_id,
+          paymentIntentSource
+        })
+      }
       await handleSubscribeResponse(response)
     } catch (error) {
       showSubscribeError(error)
@@ -269,8 +302,8 @@ export function useSubscriptionCheckout(emit: {
   }
 
   async function handleTeamSubscription() {
-    const stop = selectedTeamStop.value
-    if (!stop?.id) {
+    const teamCheckout = selectedTeamCheckout.value
+    if (!teamCheckout?.stop.id) {
       toast.add({
         severity: 'error',
         summary: t('subscription.teamPlan.name'),
@@ -279,16 +312,28 @@ export function useSubscriptionCheckout(emit: {
       return
     }
 
+    const { stop, checkoutType } = teamCheckout
+    const billingCycle = selectedBillingCycle.value
+
     isSubscribing.value = true
     try {
-      const planSlug = getTeamPlanSlug(selectedBillingCycle.value)
+      const planSlug = getTeamPlanSlug(billingCycle)
       const response = await subscribe(planSlug, {
         teamCreditStopId: stop.id,
-        billingCycle: selectedBillingCycle.value,
+        billingCycle,
         returnUrl: `${getComfyPlatformBaseUrl()}/payment/success`,
         cancelUrl: `${getComfyPlatformBaseUrl()}/payment/failed`
       })
 
+      if (response) {
+        trackWorkspaceCheckoutStarted({
+          tier: 'team',
+          cycle: billingCycle,
+          checkoutType,
+          billingOpId: response.billing_op_id,
+          paymentIntentSource
+        })
+      }
       await handleSubscribeResponse(response)
     } catch (error) {
       showSubscribeError(error)

src/platform/workspace/composables/useWorkspaceBilling.ts

@@ -2,6 +2,7 @@ import { computed, ref, shallowRef } from 'vue'
 
 import { useBillingPlans } from '@/platform/cloud/subscription/composables/useBillingPlans'
 import { useSubscriptionDialog } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { SubscriptionDialogOptions } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type {
   BillingBalanceResponse,
   BillingStatusResponse,
@@ -275,12 +276,12 @@ export function useWorkspaceBilling(): BillingState & BillingActions {
   async function requireActiveSubscription(): Promise<void> {
     await fetchStatus()
     if (!isActiveSubscription.value) {
-      subscriptionDialog.show()
+      subscriptionDialog.show({ reason: 'subscription_required' })
     }
   }
 
-  function showSubscriptionDialog(): void {
-    subscriptionDialog.show()
+  function showSubscriptionDialog(options?: SubscriptionDialogOptions): void {
+    subscriptionDialog.show(options)
   }
 
   return {

src/platform/workspace/utils/workspaceCheckoutTelemetry.ts

@@ -0,0 +1,38 @@
+import { useTelemetry } from '@/platform/telemetry'
+import type {
+  PaymentIntentSource,
+  SubscriptionCheckoutTier,
+  SubscriptionCheckoutType
+} from '@/platform/telemetry/types'
+import type { BillingCycle } from '@/platform/cloud/subscription/utils/subscriptionTierRank'
+import { useAuthStore } from '@/stores/authStore'
+
+interface TrackWorkspaceCheckoutStartedOptions {
+  tier: SubscriptionCheckoutTier
+  cycle: BillingCycle
+  checkoutType: SubscriptionCheckoutType
+  billingOpId: string
+  paymentIntentSource?: PaymentIntentSource
+}
+
+export function trackWorkspaceCheckoutStarted({
+  tier,
+  cycle,
+  checkoutType,
+  billingOpId,
+  paymentIntentSource
+}: TrackWorkspaceCheckoutStartedOptions) {
+  const { userId } = useAuthStore()
+  if (!userId) return
+
+  useTelemetry()?.trackBeginCheckout({
+    user_id: userId,
+    tier,
+    cycle,
+    checkout_type: checkoutType,
+    billing_op_id: billingOpId,
+    ...(paymentIntentSource
+      ? { payment_intent_source: paymentIntentSource }
+      : {})
+  })
+}

src/renderer/extensions/linearMode/LinearControls.test.ts

@@ -0,0 +1,208 @@
+import { createTestingPinia } from '@pinia/testing'
+import { render, screen, within } from '@testing-library/vue'
+import { setActivePinia } from 'pinia'
+import { createI18n } from 'vue-i18n'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import type { NodeError } from '@/schemas/apiSchema'
+import LinearControls from '@/renderer/extensions/linearMode/LinearControls.vue'
+import { LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID } from '@/renderer/extensions/linearMode/linearRunErrorWarningIds'
+import { useAppModeStore } from '@/stores/appModeStore'
+import { useExecutionErrorStore } from '@/stores/executionErrorStore'
+import { toNodeId } from '@/types/nodeId'
+
+const billingMock = vi.hoisted(() => ({
+  isActiveSubscription: true
+}))
+
+const overlayMock = vi.hoisted(() => ({
+  overlayMessage: 'KSampler is missing a required input: model',
+  overlayTitle: 'Required input missing'
+}))
+
+vi.mock('@/composables/billing/useBillingContext', () => ({
+  useBillingContext: () => ({
+    isActiveSubscription: billingMock.isActiveSubscription
+  })
+}))
+
+vi.mock('@/components/error/useErrorOverlayState', () => ({
+  useErrorOverlayState: () => ({
+    overlayMessage: overlayMock.overlayMessage,
+    overlayTitle: overlayMock.overlayTitle
+  })
+}))
+
+const i18n = createI18n({
+  legacy: false,
+  locale: 'en',
+  messages: {
+    en: {
+      linearMode: {
+        error: {
+          goto: 'Show errors in graph'
+        },
+        mobileNoWorkflow: 'No workflow',
+        runCount: 'Run count',
+        viewJob: 'View job'
+      },
+      menu: {
+        run: 'Run'
+      },
+      menuLabels: {
+        publish: 'Publish'
+      },
+      queue: {
+        jobAddedToQueue: 'Job added to queue',
+        jobQueueing: 'Queueing'
+      }
+    }
+  }
+})
+
+const nodeErrors: Record<string, NodeError> = {
+  '1': {
+    class_type: 'TestNode',
+    dependent_outputs: [],
+    errors: [
+      {
+        type: 'required_input_missing',
+        message: 'Missing input',
+        details: '',
+        extra_info: { input_name: 'prompt' }
+      }
+    ]
+  }
+}
+
+function renderControls({
+  hasError = false,
+  isActiveSubscription = true,
+  mobile = false
+}: {
+  hasError?: boolean
+  isActiveSubscription?: boolean
+  mobile?: boolean
+} = {}) {
+  billingMock.isActiveSubscription = isActiveSubscription
+
+  const pinia = createTestingPinia({
+    createSpy: vi.fn,
+    stubActions: false
+  })
+  setActivePinia(pinia)
+
+  useAppModeStore().selectedOutputs = [toNodeId(1)]
+  if (hasError) {
+    useExecutionErrorStore().lastNodeErrors = nodeErrors
+  }
+
+  const toastTarget = document.createElement('div')
+
+  return render(LinearControls, {
+    props: { mobile, toastTo: toastTarget },
+    global: {
+      plugins: [pinia, i18n],
+      stubs: {
+        AppModeWidgetList: true,
+        Loader: true,
+        PartnerNodesList: true,
+        Popover: {
+          template: '<div><slot name="button" /><slot /></div>'
+        },
+        ScrubableNumberInput: true,
+        SubscribeToRunButton: true
+      }
+    }
+  })
+}
+
+describe('LinearControls', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    billingMock.isActiveSubscription = true
+    overlayMock.overlayMessage = 'KSampler is missing a required input: model'
+    overlayMock.overlayTitle = 'Required input missing'
+  })
+
+  it.for([
+    { label: 'desktop', mobile: false },
+    { label: 'mobile', mobile: true }
+  ])('shows a workflow error warning in $label controls', ({ mobile }) => {
+    renderControls({ hasError: true, mobile })
+
+    const warning = screen.getByRole('status')
+    expect(
+      within(warning).getByText('Required input missing')
+    ).toBeInTheDocument()
+    expect(
+      within(warning).getByText('KSampler is missing a required input: model')
+    ).toBeInTheDocument()
+    expect(
+      within(warning).getByRole('button', { name: 'Show errors in graph' })
+    ).toBeInTheDocument()
+    expect(within(warning).queryByLabelText('Close')).not.toBeInTheDocument()
+    const runButton = screen.getByRole('button', { name: 'Run' })
+    expect(runButton).toHaveAttribute(
+      'aria-describedby',
+      LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID
+    )
+    const description = screen.getByTestId(
+      'linear-validation-warning-description'
+    )
+    expect(description).toHaveAttribute(
+      'id',
+      LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID
+    )
+    expect(description).toHaveTextContent('Required input missing')
+    expect(description).toHaveTextContent(
+      'KSampler is missing a required input: model'
+    )
+    expect(description).not.toHaveTextContent('Show errors in graph')
+  })
+
+  it.for([
+    { label: 'desktop', mobile: false },
+    { label: 'mobile', mobile: true }
+  ])(
+    'does not show the workflow error warning in $label controls without graph errors',
+    ({ mobile }) => {
+      renderControls({ mobile })
+
+      expect(screen.queryByRole('status')).not.toBeInTheDocument()
+      expect(
+        screen.queryByRole('button', { name: 'Show errors in graph' })
+      ).not.toBeInTheDocument()
+      expect(screen.getByRole('button', { name: 'Run' })).not.toHaveAttribute(
+        'aria-describedby'
+      )
+    }
+  )
+
+  it.for([
+    { label: 'desktop', mobile: false },
+    { label: 'mobile', mobile: true }
+  ])(
+    'does not show the workflow error warning in $label controls without an active subscription',
+    ({ mobile }) => {
+      renderControls({
+        hasError: true,
+        isActiveSubscription: false,
+        mobile
+      })
+
+      expect(screen.queryByRole('status')).not.toBeInTheDocument()
+    }
+  )
+
+  it('does not show the warning when the error copy is empty', () => {
+    overlayMock.overlayMessage = ''
+
+    renderControls({ hasError: true })
+
+    expect(screen.queryByRole('status')).not.toBeInTheDocument()
+    expect(screen.getByRole('button', { name: 'Run' })).not.toHaveAttribute(
+      'aria-describedby'
+    )
+  })
+})

src/renderer/extensions/linearMode/LinearControls.vue

@@ -1,10 +1,11 @@
 <script setup lang="ts">
 import { useTimeout } from '@vueuse/core'
 import { storeToRefs } from 'pinia'
-import { ref, useTemplateRef } from 'vue'
+import { computed, ref, toValue, useTemplateRef } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import AppModeWidgetList from '@/components/builder/AppModeWidgetList.vue'
+import { useErrorOverlayState } from '@/components/error/useErrorOverlayState'
 import Loader from '@/components/loader/Loader.vue'
 import ScrubableNumberInput from '@/components/common/ScrubableNumberInput.vue'
 import Popover from '@/components/ui/Popover.vue'
@@ -14,11 +15,15 @@ import SubscribeToRunButton from '@/platform/cloud/subscription/components/Subsc
 import { useSettingStore } from '@/platform/settings/settingStore'
 import { useTelemetry } from '@/platform/telemetry'
 import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
+import LinearRunErrorWarning from '@/renderer/extensions/linearMode/LinearRunErrorWarning.vue'
+import { LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID } from '@/renderer/extensions/linearMode/linearRunErrorWarningIds'
 import PartnerNodesList from '@/renderer/extensions/linearMode/PartnerNodesList.vue'
 import { useCommandStore } from '@/stores/commandStore'
 import { useQueueSettingsStore } from '@/stores/queueStore'
 import { useAppMode } from '@/composables/useAppMode'
 import { useAppModeStore } from '@/stores/appModeStore'
+import { useExecutionErrorStore } from '@/stores/executionErrorStore'
+
 const { t } = useI18n()
 const commandStore = useCommandStore()
 const { batchCount } = storeToRefs(useQueueSettingsStore())
@@ -28,6 +33,8 @@ const workflowStore = useWorkflowStore()
 const { isBuilderMode } = useAppMode()
 const appModeStore = useAppModeStore()
 const { hasOutputs } = storeToRefs(appModeStore)
+const { hasAnyError } = storeToRefs(useExecutionErrorStore())
+const { overlayMessage } = useErrorOverlayState()
 
 const { toastTo, mobile } = defineProps<{
   toastTo?: string | HTMLElement
@@ -43,6 +50,13 @@ const { ready: jobToastTimeout, start: resetJobToastTimeout } = useTimeout(
   { controls: true, immediate: false }
 )
 const widgetListRef = useTemplateRef('widgetListRef')
+const linearRunButtonTestId = 'linear-run-button'
+const showRunErrorWarning = computed(
+  () =>
+    hasAnyError.value &&
+    toValue(isActiveSubscription) &&
+    toValue(overlayMessage).trim().length > 0
+)
 
 //TODO: refactor out of this file.
 //code length is small, but changes should propagate
@@ -134,9 +148,10 @@ function handleDragDrop() {
       <PartnerNodesList v-if="!mobile" />
       <section
         v-if="mobile"
-        data-testid="linear-run-button"
+        :data-testid="linearRunButtonTestId"
         class="border-t border-node-component-border p-4 pb-6"
       >
+        <LinearRunErrorWarning v-if="showRunErrorWarning" />
         <SubscribeToRunButton
           v-if="!isActiveSubscription"
           class="mt-4 w-full"
@@ -166,18 +181,24 @@ function handleDragDrop() {
             variant="primary"
             class="grow"
             size="lg"
+            :aria-describedby="
+              showRunErrorWarning
+                ? LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID
+                : undefined
+            "
             @click="runButtonClick"
           >
-            <i class="icon-[lucide--play]" />
+            <i aria-hidden="true" class="icon-[lucide--play]" />
             {{ t('menu.run') }}
           </Button>
         </div>
       </section>
       <section
         v-else
-        data-testid="linear-run-button"
+        :data-testid="linearRunButtonTestId"
         class="border-t border-node-component-border p-4 pb-6"
       >
+        <LinearRunErrorWarning v-if="showRunErrorWarning" />
         <div
           class="m-1 mb-2 text-node-component-slot-text"
           v-text="t('linearMode.runCount')"
@@ -198,9 +219,14 @@ function handleDragDrop() {
           variant="primary"
           class="mt-4 w-full text-sm"
           size="lg"
+          :aria-describedby="
+            showRunErrorWarning
+              ? LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID
+              : undefined
+          "
           @click="runButtonClick"
         >
-          <i class="icon-[lucide--play]" />
+          <i aria-hidden="true" class="icon-[lucide--play]" />
           {{ t('menu.run') }}
         </Button>
       </section>

src/renderer/extensions/linearMode/LinearRunErrorWarning.test.ts

@@ -0,0 +1,92 @@
+import { render, screen } from '@testing-library/vue'
+import userEvent from '@testing-library/user-event'
+import { createI18n } from 'vue-i18n'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import LinearRunErrorWarning from '@/renderer/extensions/linearMode/LinearRunErrorWarning.vue'
+import { LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID } from '@/renderer/extensions/linearMode/linearRunErrorWarningIds'
+
+const mocks = vi.hoisted(() => ({
+  overlayMessage: 'KSampler is missing a required input: model',
+  overlayTitle: 'Required input missing',
+  viewErrorsInGraph: vi.fn()
+}))
+
+vi.mock('@/components/error/useErrorOverlayState', () => ({
+  useErrorOverlayState: () => ({
+    overlayMessage: mocks.overlayMessage,
+    overlayTitle: mocks.overlayTitle
+  })
+}))
+
+vi.mock('@/composables/useViewErrorsInGraph', () => ({
+  useViewErrorsInGraph: () => ({
+    viewErrorsInGraph: mocks.viewErrorsInGraph
+  })
+}))
+
+const i18n = createI18n({
+  legacy: false,
+  locale: 'en',
+  messages: {
+    en: {
+      linearMode: {
+        error: {
+          goto: 'Show errors in graph'
+        }
+      }
+    }
+  }
+})
+
+function renderWarning() {
+  const user = userEvent.setup()
+  const result = render(LinearRunErrorWarning, {
+    global: { plugins: [i18n] }
+  })
+
+  return { ...result, user }
+}
+
+describe('LinearRunErrorWarning', () => {
+  beforeEach(() => {
+    mocks.viewErrorsInGraph.mockReset()
+  })
+
+  it('shows the current error overlay title and message without a close action', () => {
+    renderWarning()
+
+    const warning = screen.getByRole('status')
+    expect(warning).toHaveTextContent('Required input missing')
+    expect(warning).toHaveTextContent(
+      'KSampler is missing a required input: model'
+    )
+    expect(screen.getByText('Required input missing')).toHaveAttribute(
+      'title',
+      'Required input missing'
+    )
+    const description = screen.getByTestId(
+      'linear-validation-warning-description'
+    )
+    expect(description).toHaveAttribute(
+      'id',
+      LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID
+    )
+    expect(description).toHaveTextContent('Required input missing')
+    expect(description).toHaveTextContent(
+      'KSampler is missing a required input: model'
+    )
+    expect(description).not.toHaveTextContent('Show errors in graph')
+    expect(screen.queryByLabelText('Close')).not.toBeInTheDocument()
+  })
+
+  it('opens graph errors when the action is clicked', async () => {
+    const { user } = renderWarning()
+
+    await user.click(
+      screen.getByRole('button', { name: 'Show errors in graph' })
+    )
+
+    expect(mocks.viewErrorsInGraph).toHaveBeenCalledOnce()
+  })
+})

src/renderer/extensions/linearMode/LinearRunErrorWarning.vue

@@ -0,0 +1,63 @@
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n'
+
+import Button from '@/components/ui/button/Button.vue'
+import { useErrorOverlayState } from '@/components/error/useErrorOverlayState'
+import { useViewErrorsInGraph } from '@/composables/useViewErrorsInGraph'
+import { LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID } from '@/renderer/extensions/linearMode/linearRunErrorWarningIds'
+
+const { t } = useI18n()
+const { viewErrorsInGraph } = useViewErrorsInGraph()
+const { overlayMessage, overlayTitle } = useErrorOverlayState()
+</script>
+
+<template>
+  <div
+    role="status"
+    data-testid="linear-validation-warning"
+    class="mb-3 flex w-full flex-col gap-2 overflow-hidden rounded-lg border border-l-4 border-border-default border-l-destructive-background bg-base-background p-3 shadow-interface transition-colors duration-200 ease-in-out"
+  >
+    <div
+      :id="LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID"
+      data-testid="linear-validation-warning-description"
+      class="flex flex-col gap-2"
+    >
+      <div class="flex w-full items-start gap-2">
+        <i
+          aria-hidden="true"
+          class="mt-0.5 icon-[lucide--circle-x] size-4 shrink-0 text-destructive-background"
+        />
+        <span
+          class="min-w-0 flex-1 truncate text-sm text-base-foreground"
+          :title="overlayTitle"
+        >
+          {{ overlayTitle }}
+        </span>
+      </div>
+
+      <div
+        class="flex w-full items-start gap-2"
+        data-testid="linear-validation-warning-message"
+      >
+        <span class="size-4 shrink-0" aria-hidden="true" />
+        <p
+          class="m-0 line-clamp-3 min-w-0 flex-1 text-sm/snug wrap-break-word whitespace-pre-wrap text-muted-foreground"
+        >
+          {{ overlayMessage }}
+        </p>
+      </div>
+    </div>
+
+    <div class="flex w-full items-center justify-end pt-2">
+      <Button
+        variant="secondary"
+        size="unset"
+        class="min-h-8 rounded-lg px-3 py-2 text-xs font-normal"
+        data-testid="linear-view-errors"
+        @click="viewErrorsInGraph"
+      >
+        {{ t('linearMode.error.goto') }}
+      </Button>
+    </div>
+  </div>
+</template>

src/renderer/extensions/linearMode/linearRunErrorWarningIds.ts

@@ -0,0 +1,2 @@
+export const LINEAR_RUN_ERROR_WARNING_DESCRIPTION_ID =
+  'linear-run-error-warning'

src/schemas/nodeDefSchema.test.ts

@@ -0,0 +1,57 @@
+import { describe, expect, it } from 'vitest'
+
+import {
+  getComboSpecComboOptions,
+  getInputSpecType,
+  isComboInputSpec,
+  isComboInputSpecV1,
+  isComboInputSpecV2,
+  isFloatInputSpec,
+  isIntInputSpec,
+  isMediaUploadComboInput
+} from './nodeDefSchema'
+import type {
+  ComboInputSpec,
+  ComboInputSpecV2,
+  InputSpec
+} from './nodeDefSchema'
+
+describe('node definition schema helpers', () => {
+  it('identifies input spec variants', () => {
+    const intSpec: InputSpec = ['INT', {}]
+    const floatSpec: InputSpec = ['FLOAT', {}]
+    const comboV1: ComboInputSpec = [['a', 'b'], {}]
+    const comboV2: ComboInputSpecV2 = ['COMBO', { options: ['a', 'b'] }]
+
+    expect(isIntInputSpec(intSpec)).toBe(true)
+    expect(isFloatInputSpec(floatSpec)).toBe(true)
+    expect(isComboInputSpecV1(comboV1)).toBe(true)
+    expect(isComboInputSpecV2(comboV2)).toBe(true)
+    expect(isComboInputSpec(comboV1)).toBe(true)
+    expect(isComboInputSpec(comboV2)).toBe(true)
+    expect(getInputSpecType(comboV1)).toBe('COMBO')
+    expect(getInputSpecType(intSpec)).toBe('INT')
+  })
+
+  it('reads combo options from legacy and v2 combo specs', () => {
+    expect(getComboSpecComboOptions([['a', 1], {}])).toEqual(['a', 1])
+    expect(
+      getComboSpecComboOptions(['COMBO', { options: ['x', 'y'] }])
+    ).toEqual(['x', 'y'])
+    expect(getComboSpecComboOptions(['COMBO', {}])).toEqual([])
+  })
+
+  it('detects media upload combo inputs', () => {
+    expect(isMediaUploadComboInput([['a'], { image_upload: true }])).toBe(true)
+    expect(
+      isMediaUploadComboInput(['COMBO', { animated_image_upload: true }])
+    ).toBe(true)
+    expect(isMediaUploadComboInput(['COMBO', { video_upload: true }])).toBe(
+      true
+    )
+    expect(isMediaUploadComboInput(['STRING', { image_upload: true }])).toBe(
+      false
+    )
+    expect(isMediaUploadComboInput(['COMBO', undefined])).toBe(false)
+  })
+})

src/scripts/api.cloud.test.ts

@@ -0,0 +1,149 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import {
+  fetchWithUnifiedRemint,
+  shouldRemintCloudRequest
+} from '@/platform/auth/unified/remintRetry'
+
+const { mockAuthStore } = vi.hoisted(() => ({
+  mockAuthStore: {
+    isInitialized: true,
+    getAuthHeader: vi.fn(),
+    getAuthToken: vi.fn()
+  }
+}))
+
+vi.mock('@/platform/distribution/types', () => ({ isCloud: true }))
+
+vi.mock('@/stores/authStore', () => ({
+  useAuthStore: vi.fn(() => mockAuthStore)
+}))
+
+vi.mock('@/platform/auth/unified/remintRetry', () => ({
+  fetchWithUnifiedRemint: vi.fn(),
+  shouldRemintCloudRequest: vi.fn()
+}))
+
+class FakeWebSocket extends EventTarget {
+  static instances: FakeWebSocket[] = []
+
+  binaryType = ''
+  sent: string[] = []
+
+  constructor(readonly url: string) {
+    super()
+    FakeWebSocket.instances.push(this)
+  }
+
+  send(data: string) {
+    this.sent.push(data)
+  }
+
+  close() {
+    this.dispatchEvent(new Event('close'))
+  }
+}
+
+const { ComfyApi } = await import('./api')
+
+describe('ComfyApi cloud mode', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.unstubAllGlobals()
+    FakeWebSocket.instances = []
+    window.name = ''
+    sessionStorage.clear()
+    mockAuthStore.isInitialized = true
+    mockAuthStore.getAuthHeader.mockResolvedValue(null)
+    mockAuthStore.getAuthToken.mockResolvedValue(null)
+    vi.mocked(shouldRemintCloudRequest).mockResolvedValue(false)
+    vi.mocked(fetchWithUnifiedRemint).mockResolvedValue(
+      new Response(JSON.stringify({ ok: true }), {
+        headers: { 'Content-Type': 'application/json' }
+      })
+    )
+    vi.stubGlobal('WebSocket', FakeWebSocket as unknown as typeof WebSocket)
+  })
+
+  it('adds cloud auth headers and enables unified retry for authenticated requests', async () => {
+    mockAuthStore.getAuthHeader.mockResolvedValue({
+      Authorization: 'Bearer firebase-token'
+    })
+    vi.mocked(shouldRemintCloudRequest).mockResolvedValue(true)
+    const api = new ComfyApi()
+    api.user = 'cloud-user'
+
+    await api.fetchApi('/queue')
+
+    expect(api.api_base).toBe('')
+    expect(fetchWithUnifiedRemint).toHaveBeenCalledWith(
+      '/api/queue',
+      expect.objectContaining({
+        cache: 'no-cache',
+        headers: {
+          Authorization: 'Bearer firebase-token',
+          'Comfy-User': 'cloud-user'
+        }
+      }),
+      true
+    )
+  })
+
+  it('continues cloud fetches when auth header lookup fails', async () => {
+    mockAuthStore.getAuthHeader.mockRejectedValue(new Error('auth unavailable'))
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => {})
+    const api = new ComfyApi()
+
+    await api.fetchApi('/history', {
+      headers: [['X-Test', '1']]
+    })
+
+    const [, options, retryOn401] = vi.mocked(fetchWithUnifiedRemint).mock
+      .calls[0]
+    expect(options.headers).toEqual([
+      ['X-Test', '1'],
+      ['Comfy-User', '']
+    ])
+    expect(retryOn401).toBe(false)
+    expect(shouldRemintCloudRequest).not.toHaveBeenCalled()
+    expect(warn).toHaveBeenCalledWith(
+      'Failed to get auth header:',
+      expect.any(Error)
+    )
+  })
+
+  it('adds the cloud auth token to websocket URLs', async () => {
+    mockAuthStore.getAuthToken.mockResolvedValue('socket-token')
+    window.name = 'client-1'
+    const api = new ComfyApi()
+
+    api.init()
+
+    await vi.waitFor(() => {
+      expect(FakeWebSocket.instances).toHaveLength(1)
+    })
+    const socket = FakeWebSocket.instances[0]
+
+    expect(socket.url).toContain('clientId=client-1')
+    expect(socket.url).toContain('token=socket-token')
+  })
+
+  it('opens a cloud websocket without a token when token lookup fails', async () => {
+    mockAuthStore.getAuthToken.mockRejectedValue(new Error('token unavailable'))
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => {})
+    const api = new ComfyApi()
+
+    api.init()
+
+    await vi.waitFor(() => {
+      expect(FakeWebSocket.instances).toHaveLength(1)
+    })
+    const socket = FakeWebSocket.instances[0]
+
+    expect(socket.url).not.toContain('token=')
+    expect(warn).toHaveBeenCalledWith(
+      'Could not get auth token for WebSocket connection:',
+      expect.any(Error)
+    )
+  })
+})

src/scripts/api.core.test.ts

@@ -0,0 +1,460 @@
+import axios from 'axios'
+import { fromPartial } from '@total-typescript/shoehorn'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+import type { JobListItem } from '@/platform/remote/comfyui/jobs/jobTypes'
+import type {
+  ComfyApiWorkflow,
+  ComfyWorkflowJSON
+} from '@/platform/workflow/validation/schemas/workflowSchema'
+import type { PromptResponse } from '@/schemas/apiSchema'
+import { api as sharedApi, ComfyApi, PromptExecutionError } from '@/scripts/api'
+import type { NodeExecutionId } from '@/types/nodeIdentification'
+
+const fetchJobs = vi.hoisted(() => ({
+  fetchHistory: vi.fn(),
+  fetchJobDetail: vi.fn(),
+  fetchQueue: vi.fn()
+}))
+
+vi.mock('axios')
+vi.mock('@/platform/remote/comfyui/jobs/fetchJobs', () => fetchJobs)
+
+afterEach(() => {
+  vi.restoreAllMocks()
+  vi.clearAllMocks()
+})
+
+function jsonResponse(data: unknown, init: ResponseInit = {}) {
+  return new Response(JSON.stringify(data), {
+    status: 200,
+    headers: { 'content-type': 'application/json' },
+    ...init
+  })
+}
+
+function promptData(): {
+  output: ComfyApiWorkflow
+  workflow: ComfyWorkflowJSON
+} {
+  return {
+    output: fromPartial<ComfyApiWorkflow>({
+      1: {
+        inputs: {},
+        class_type: 'KSampler',
+        _meta: { title: 'KSampler' }
+      }
+    }),
+    workflow: fromPartial<ComfyWorkflowJSON>({
+      version: 0.4,
+      nodes: [],
+      links: []
+    })
+  }
+}
+
+function requestBody(fetchApi: ReturnType<typeof vi.spyOn>, call = 0) {
+  const init = fetchApi.mock.calls[call][1]
+  return JSON.parse(String(init?.body)) as Record<string, unknown>
+}
+
+describe('PromptExecutionError', () => {
+  it('formats string and node-specific prompt errors', () => {
+    const response = fromPartial<PromptResponse>({
+      error: 'invalid prompt',
+      node_errors: {
+        7: {
+          class_type: 'KSampler',
+          dependent_outputs: [],
+          errors: [{ message: 'bad seed', details: 'seed must be numeric' }]
+        }
+      }
+    })
+
+    expect(new PromptExecutionError(response, 400).toString()).toBe(
+      'invalid prompt\nKSampler:\n    - bad seed: seed must be numeric'
+    )
+  })
+
+  it('formats structured prompt errors without node errors', () => {
+    const response = fromPartial<PromptResponse>({
+      error: {
+        type: 'prompt_outputs_failed_validation',
+        message: 'Validation failed',
+        details: 'missing node'
+      }
+    })
+
+    expect(new PromptExecutionError(response).toString()).toBe(
+      'Validation failed: missing node'
+    )
+  })
+})
+
+describe('ComfyApi queuePrompt', () => {
+  it('sends front queue requests with auth and execution options', async () => {
+    const api = new ComfyApi()
+    api.clientId = 'client-1'
+    api.authToken = 'auth-token'
+    api.apiKey = 'api-key'
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockResolvedValue(jsonResponse({ prompt_id: 'queued' }))
+
+    await api.queuePrompt(-1, promptData(), {
+      partialExecutionTargets: ['9:10' as NodeExecutionId],
+      previewMethod: 'auto'
+    })
+
+    expect(fetchApi).toHaveBeenCalledWith('/prompt', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: fetchApi.mock.calls[0][1]?.body
+    })
+    expect(typeof fetchApi.mock.calls[0][1]?.body).toBe('string')
+    expect(requestBody(fetchApi)).toMatchObject({
+      client_id: 'client-1',
+      front: true,
+      partial_execution_targets: ['9:10'],
+      extra_data: {
+        auth_token_comfy_org: 'auth-token',
+        api_key_comfy_org: 'api-key',
+        comfy_usage_source: 'comfyui-frontend',
+        preview_method: 'auto'
+      }
+    })
+    expect(requestBody(fetchApi)).not.toHaveProperty('number')
+  })
+
+  it('omits default-only queue options and sets explicit queue numbers', async () => {
+    const api = new ComfyApi()
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockImplementation(() =>
+        Promise.resolve(jsonResponse({ prompt_id: 'queued' }))
+      )
+
+    await api.queuePrompt(0, promptData(), { previewMethod: 'default' })
+    await api.queuePrompt(4, promptData())
+
+    expect(requestBody(fetchApi, 0)).toMatchObject({ client_id: '' })
+    expect(requestBody(fetchApi, 0)).not.toHaveProperty('front')
+    expect(requestBody(fetchApi, 0)).not.toHaveProperty('number')
+    expect(
+      requestBody(fetchApi, 0).extra_data as Record<string, unknown>
+    ).not.toHaveProperty('preview_method')
+    expect(requestBody(fetchApi, 1)).toMatchObject({ number: 4 })
+  })
+
+  it('throws parsed prompt errors from non-200 responses', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(api, 'fetchApi').mockResolvedValue(
+      jsonResponse(
+        {
+          error: {
+            type: 'server_error',
+            message: 'Server rejected prompt',
+            details: 'bad output'
+          }
+        },
+        { status: 400, statusText: 'Bad Request' }
+      )
+    )
+
+    await expect(api.queuePrompt(0, promptData())).rejects.toThrow(
+      'Prompt execution failed'
+    )
+  })
+
+  it('wraps non-json prompt errors with status details', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(api, 'fetchApi').mockResolvedValue(
+      new Response('backend exploded', {
+        status: 500,
+        statusText: 'Server Error'
+      })
+    )
+
+    await expect(api.queuePrompt(0, promptData())).rejects.toMatchObject({
+      status: 500,
+      response: {
+        error: {
+          message: '500 Server Error',
+          details: 'backend exploded'
+        }
+      }
+    })
+  })
+})
+
+describe('ComfyApi read helpers', () => {
+  it('returns localized templates, default templates, and empty non-json responses', async () => {
+    const api = new ComfyApi()
+    vi.mocked(axios.get)
+      .mockResolvedValueOnce({
+        headers: { 'content-type': 'application/json' },
+        data: [{ name: 'localized' }]
+      })
+      .mockResolvedValueOnce({
+        headers: { 'content-type': 'text/html' },
+        data: '<html></html>'
+      })
+
+    await expect(api.getCoreWorkflowTemplates('fr')).resolves.toEqual([
+      { name: 'localized' }
+    ])
+    await expect(api.getCoreWorkflowTemplates()).resolves.toEqual([])
+    expect(vi.mocked(axios.get).mock.calls[0][0]).toContain(
+      '/templates/index.fr.json'
+    )
+    expect(vi.mocked(axios.get).mock.calls[1][0]).toContain(
+      '/templates/index.json'
+    )
+  })
+
+  it('falls back from missing localized templates to the default index', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(console, 'warn').mockImplementation(() => {})
+    vi.mocked(axios.get)
+      .mockRejectedValueOnce(new Error('missing locale'))
+      .mockResolvedValueOnce({
+        headers: { 'content-type': 'application/json' },
+        data: [{ name: 'default' }]
+      })
+
+    await expect(api.getCoreWorkflowTemplates('ja')).resolves.toEqual([
+      { name: 'default' }
+    ])
+    expect(vi.mocked(axios.get).mock.calls[1][0]).toContain(
+      '/templates/index.json'
+    )
+  })
+
+  it('returns empty model lists for 404s and filters internal folders', async () => {
+    const api = new ComfyApi()
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse([], { status: 404 }))
+      .mockResolvedValueOnce(
+        jsonResponse([
+          { name: 'checkpoints' },
+          { name: 'configs' },
+          { name: 'custom_nodes' }
+        ])
+      )
+      .mockResolvedValueOnce(jsonResponse([], { status: 404 }))
+      .mockResolvedValueOnce(jsonResponse(['model.safetensors']))
+
+    await expect(api.getModelFolders()).resolves.toEqual([])
+    await expect(api.getModelFolders()).resolves.toEqual([
+      { name: 'checkpoints' }
+    ])
+    await expect(api.getModels('checkpoints')).resolves.toEqual([])
+    await expect(api.getModels('checkpoints')).resolves.toEqual([
+      'model.safetensors'
+    ])
+    expect(fetchApi).toHaveBeenCalledTimes(4)
+  })
+
+  it('handles model metadata text responses', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+    vi.spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(new Response(''))
+      .mockResolvedValueOnce(new Response('{"format":"safetensors"}'))
+      .mockResolvedValueOnce(
+        new Response('not json', { status: 200, statusText: 'OK' })
+      )
+
+    await expect(
+      api.viewMetadata('checkpoints', 'a.safetensors')
+    ).resolves.toBe(null)
+    await expect(
+      api.viewMetadata('checkpoints', 'a.safetensors')
+    ).resolves.toEqual({ format: 'safetensors' })
+    await expect(
+      api.viewMetadata('checkpoints', 'a.safetensors')
+    ).resolves.toBe(null)
+  })
+
+  it('gets fuse options only from json responses', async () => {
+    const api = new ComfyApi()
+    vi.mocked(axios.get)
+      .mockResolvedValueOnce({
+        headers: { 'content-type': 'application/json' },
+        data: { keys: ['name'] }
+      })
+      .mockResolvedValueOnce({
+        headers: { 'content-type': 'text/plain' },
+        data: 'nope'
+      })
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+
+    await expect(api.getFuseOptions()).resolves.toEqual({ keys: ['name'] })
+    await expect(api.getFuseOptions()).resolves.toBeNull()
+    vi.mocked(axios.get).mockRejectedValueOnce(new Error('missing'))
+    await expect(api.getFuseOptions()).resolves.toBeNull()
+  })
+})
+
+describe('ComfyApi queue and data helpers', () => {
+  it('routes item collection requests to queue or history', async () => {
+    const api = new ComfyApi()
+    const queue = vi.spyOn(api, 'getQueue').mockResolvedValue({
+      Running: [],
+      Pending: []
+    })
+    const historyItem = fromPartial<JobListItem>({
+      id: 'history-1',
+      status: 'completed',
+      create_time: 1,
+      priority: 0
+    })
+    const history = vi.spyOn(api, 'getHistory').mockResolvedValue([historyItem])
+
+    await expect(api.getItems('queue')).resolves.toEqual({
+      Running: [],
+      Pending: []
+    })
+    await expect(api.getItems('history')).resolves.toEqual([historyItem])
+    expect(queue).toHaveBeenCalledOnce()
+    expect(history).toHaveBeenCalledOnce()
+  })
+
+  it('returns queue fallbacks unless errors are requested', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+    fetchJobs.fetchQueue.mockRejectedValue(new Error('network'))
+
+    await expect(api.getQueue()).resolves.toEqual({ Running: [], Pending: [] })
+    await expect(api.getQueue({ throwOnError: true })).rejects.toThrow(
+      'network'
+    )
+  })
+
+  it('returns empty history when fetchHistory fails', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+    fetchJobs.fetchHistory.mockRejectedValue(new Error('history down'))
+
+    await expect(api.getHistory()).resolves.toEqual([])
+  })
+
+  it('posts item mutations with and without request bodies', async () => {
+    const api = new ComfyApi()
+    const fetchApi = vi.spyOn(api, 'fetchApi').mockResolvedValue(new Response())
+
+    await api.deleteItem('history', 'job-1')
+    await api.clearItems('queue')
+    await api.interrupt(null)
+    await api.interrupt('running-1')
+
+    expect(fetchApi.mock.calls.map((call) => call[0])).toEqual([
+      '/history',
+      '/queue',
+      '/interrupt',
+      '/interrupt'
+    ])
+    expect(fetchApi.mock.calls[0][1]?.body).toBe(
+      JSON.stringify({ delete: ['job-1'] })
+    )
+    expect(fetchApi.mock.calls[1][1]?.body).toBe(
+      JSON.stringify({ clear: true })
+    )
+    expect(fetchApi.mock.calls[2][1]?.body).toBeUndefined()
+    expect(fetchApi.mock.calls[3][1]?.body).toBe(
+      JSON.stringify({ prompt_id: 'running-1' })
+    )
+  })
+
+  it('throws unauthorized settings responses', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(api, 'fetchApi').mockResolvedValue(
+      new Response('', { status: 401, statusText: 'Unauthorized' })
+    )
+
+    await expect(api.getSettings()).rejects.toThrow('Unauthorized')
+  })
+
+  it('stores user data with default and raw-body options', async () => {
+    const api = new ComfyApi()
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockResolvedValue(new Response('', { status: 200 }))
+    const raw = new Blob(['raw'])
+
+    await api.storeUserData('a/b.json', { ok: true })
+    await api.storeUserData('raw.bin', raw, {
+      overwrite: false,
+      stringify: false,
+      throwOnError: false,
+      full_info: true
+    })
+
+    expect(fetchApi.mock.calls[0][0]).toBe(
+      '/userdata/a%2Fb.json?overwrite=true&full_info=false'
+    )
+    expect(fetchApi.mock.calls[0][1]?.body).toBe(JSON.stringify({ ok: true }))
+    expect(fetchApi.mock.calls[1][0]).toBe(
+      '/userdata/raw.bin?overwrite=false&full_info=true'
+    )
+    expect(fetchApi.mock.calls[1][1]?.body).toBe(raw)
+  })
+
+  it('honors storeUserData throwOnError', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(
+        new Response('', { status: 500, statusText: 'Server Error' })
+      )
+      .mockResolvedValueOnce(
+        new Response('', { status: 500, statusText: 'Server Error' })
+      )
+
+    await expect(api.storeUserData('bad.json', {})).rejects.toThrow(
+      "Error storing user data file 'bad.json': 500 Server Error"
+    )
+    await expect(
+      api.storeUserData('bad.json', {}, { throwOnError: false })
+    ).resolves.toHaveProperty('status', 500)
+  })
+
+  it('lists full user data info by status', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse([], { status: 404 }))
+      .mockResolvedValueOnce(
+        new Response('', { status: 500, statusText: 'Server Error' })
+      )
+      .mockResolvedValueOnce(jsonResponse([{ path: 'x' }]))
+
+    await expect(api.listUserDataFullInfo('models/')).resolves.toEqual([])
+    await expect(api.listUserDataFullInfo('models/')).rejects.toThrow(
+      "Error getting user data list 'models': 500 Server Error"
+    )
+    await expect(api.listUserDataFullInfo('models/')).resolves.toEqual([
+      { path: 'x' }
+    ])
+  })
+
+  it('loads global subgraph records and deferred data', async () => {
+    const fetchApi = vi
+      .spyOn(sharedApi, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse({}, { status: 500 }))
+      .mockResolvedValueOnce(
+        jsonResponse({
+          ready: { name: 'Ready', info: { node_pack: 'core' }, data: '{}' },
+          lazy: { name: 'Lazy', info: { node_pack: 'core' } }
+        })
+      )
+      .mockResolvedValueOnce(jsonResponse({ data: '{"lazy":true}' }))
+
+    await expect(sharedApi.getGlobalSubgraphs()).resolves.toEqual({})
+    const subgraphs = await sharedApi.getGlobalSubgraphs()
+
+    expect(subgraphs.ready.data).toBe('{}')
+    expect(subgraphs.lazy.data).toBeInstanceOf(Promise)
+    await expect(subgraphs.lazy.data).resolves.toBe('{"lazy":true}')
+    expect(fetchApi).toHaveBeenCalledTimes(3)
+  })
+})

src/scripts/api.test.ts

@@ -0,0 +1,829 @@
+import { fromAny } from '@total-typescript/shoehorn'
+import axios from 'axios'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+import {
+  api as singletonApi,
+  ComfyApi,
+  PromptExecutionError,
+  UnauthorizedError
+} from '@/scripts/api'
+import type { ComfyApiWorkflow } from '@/platform/workflow/validation/schemas/workflowSchema'
+import type { NodeExecutionId } from '@/types/nodeIdentification'
+import { fetchWithUnifiedRemint } from '@/platform/auth/unified/remintRetry'
+
+const { mockToastStore } = vi.hoisted(() => ({
+  mockToastStore: {
+    add: vi.fn()
+  }
+}))
+
+vi.mock('@/platform/auth/unified/remintRetry', () => ({
+  fetchWithUnifiedRemint: vi.fn(),
+  shouldRemintCloudRequest: vi.fn()
+}))
+
+vi.mock('@/platform/updates/common/toastStore', () => ({
+  useToastStore: vi.fn(() => mockToastStore)
+}))
+
+vi.mock('axios', () => ({
+  default: {
+    get: vi.fn(),
+    patch: vi.fn()
+  }
+}))
+
+class FakeWebSocket extends EventTarget {
+  static instances: FakeWebSocket[] = []
+
+  binaryType = ''
+  sent: string[] = []
+
+  constructor(readonly url: string) {
+    super()
+    FakeWebSocket.instances.push(this)
+  }
+
+  send(data: string) {
+    this.sent.push(data)
+  }
+
+  close() {
+    this.dispatchEvent(new Event('close'))
+  }
+}
+
+function jsonResponse(data: unknown, init: ResponseInit = {}) {
+  return new Response(JSON.stringify(data), {
+    status: 200,
+    headers: { 'Content-Type': 'application/json' },
+    ...init
+  })
+}
+
+function createWorkflow() {
+  return {
+    last_node_id: 0,
+    last_link_id: 0,
+    nodes: [],
+    links: [],
+    groups: [],
+    config: {},
+    extra: {},
+    version: 0.4
+  }
+}
+
+function binaryMessage(type: number, payload: Uint8Array) {
+  const bytes = new Uint8Array(4 + payload.length)
+  new DataView(bytes.buffer).setUint32(0, type)
+  bytes.set(payload, 4)
+  return bytes.buffer
+}
+
+function uint32(value: number) {
+  const bytes = new Uint8Array(4)
+  new DataView(bytes.buffer).setUint32(0, value)
+  return bytes
+}
+
+function concatBytes(...chunks: Uint8Array[]) {
+  const totalLength = chunks.reduce((sum, chunk) => sum + chunk.length, 0)
+  const result = new Uint8Array(totalLength)
+  let offset = 0
+  for (const chunk of chunks) {
+    result.set(chunk, offset)
+    offset += chunk.length
+  }
+  return result
+}
+
+describe('PromptExecutionError', () => {
+  it('formats string, structured, and node-level errors', () => {
+    expect(
+      new PromptExecutionError({
+        error: 'Queue rejected',
+        node_errors: {}
+      }).toString()
+    ).toBe('Queue rejected')
+
+    expect(
+      new PromptExecutionError({
+        error: {
+          type: 'invalid_prompt',
+          message: 'Invalid prompt',
+          details: 'missing input'
+        },
+        node_errors: {
+          1: {
+            class_type: 'PreviewAny',
+            dependent_outputs: ['1'],
+            errors: [
+              {
+                type: 'required_input_missing',
+                message: 'Required input',
+                details: 'source'
+              }
+            ]
+          }
+        }
+      }).toString()
+    ).toContain('Invalid prompt: missing input\nPreviewAny:')
+  })
+})
+
+describe('ComfyApi', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    FakeWebSocket.instances = []
+    window.name = ''
+    sessionStorage.clear()
+    vi.stubGlobal('WebSocket', FakeWebSocket as unknown as typeof WebSocket)
+  })
+
+  afterEach(() => {
+    vi.restoreAllMocks()
+    vi.unstubAllGlobals()
+  })
+
+  it('builds API, internal, file, and fetch URLs with user headers', async () => {
+    const api = new ComfyApi()
+    api.user = 'reviewer'
+    vi.mocked(fetchWithUnifiedRemint).mockResolvedValue(
+      jsonResponse({ ok: true })
+    )
+
+    await api.fetchApi('/queue', {
+      headers: new Headers([['X-Test', '1']])
+    })
+
+    expect(api.apiURL('/api/custom')).toBe(`${api.api_base}/api/custom`)
+    expect(api.apiURL('/queue')).toBe(`${api.api_base}/api/queue`)
+    expect(api.internalURL('/logs')).toBe(`${api.api_base}/internal/logs`)
+    expect(api.fileURL('/view')).toBe(`${api.api_base}/view`)
+    const [, options] = vi.mocked(fetchWithUnifiedRemint).mock.calls[0]
+    expect(options.headers).toBeInstanceOf(Headers)
+    expect((options.headers as Headers).get('Comfy-User')).toBe('reviewer')
+    expect((options.headers as Headers).get('X-Test')).toBe('1')
+  })
+
+  it('guards event listeners and still allows removing them', async () => {
+    const api = new ComfyApi()
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined)
+    const listener = vi.fn()
+    const throwingListener = vi.fn(() => {
+      throw new Error('listener failed')
+    })
+    const asyncListener = vi.fn(() => Promise.reject(new Error('async failed')))
+    const objectListener = { handleEvent: vi.fn() }
+
+    api.addEventListener('status', null)
+    api.removeEventListener('status', null)
+    api.addEventListener('status', listener)
+    api.addEventListener('status', throwingListener)
+    api.addEventListener('status', asyncListener)
+    api.addEventListener('status', fromAny(objectListener))
+
+    api.dispatchCustomEvent('status', { exec_info: { queue_remaining: 1 } })
+    await Promise.resolve()
+
+    expect(listener).toHaveBeenCalled()
+    expect(throwingListener).toHaveBeenCalled()
+    expect(asyncListener).toHaveBeenCalled()
+    expect(objectListener.handleEvent).toHaveBeenCalled()
+    expect(warn).toHaveBeenCalledTimes(2)
+
+    api.removeEventListener('status', listener)
+    api.dispatchCustomEvent('status', null)
+    expect(listener).toHaveBeenCalledTimes(1)
+  })
+
+  it('reuses guarded listener wrappers and ignores unknown removals', () => {
+    const api = new ComfyApi()
+    const listener = vi.fn()
+    const neverRegistered = vi.fn()
+
+    api.addEventListener('status', listener)
+    api.addEventListener('status', listener)
+    api.removeEventListener('status', neverRegistered)
+    api.dispatchCustomEvent('status', null)
+
+    expect(listener).toHaveBeenCalledTimes(1)
+    expect(neverRegistered).not.toHaveBeenCalled()
+  })
+
+  it('supports guarded custom event listeners', () => {
+    const api = new ComfyApi()
+    const listener = vi.fn()
+
+    api.addCustomEventListener('custom-node-event', listener)
+    ;(api as EventTarget).dispatchEvent(
+      new CustomEvent('custom-node-event', { detail: { ok: true } })
+    )
+    api.removeCustomEventListener('custom-node-event', listener)
+    ;(api as EventTarget).dispatchEvent(
+      new CustomEvent('custom-node-event', { detail: { ok: false } })
+    )
+
+    expect(listener).toHaveBeenCalledTimes(1)
+  })
+
+  it('routes websocket JSON messages and custom registered messages', () => {
+    window.name = 'existing-client'
+    const api = new ComfyApi()
+    const status = vi.fn()
+    const executing = vi.fn()
+    const featureFlags = vi.fn()
+    const custom = vi.fn()
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined)
+    vi.spyOn(console, 'log').mockImplementation(() => undefined)
+
+    api.addEventListener('status', status)
+    api.addEventListener('executing', executing)
+    api.addEventListener('feature_flags', featureFlags)
+    api.addCustomEventListener('custom-message', custom)
+    api.init()
+    const socket = FakeWebSocket.instances[0]
+    socket.dispatchEvent(new Event('open'))
+
+    expect(socket.url).toContain('clientId=existing-client')
+    expect(JSON.parse(socket.sent[0])).toMatchObject({
+      type: 'feature_flags'
+    })
+
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'status',
+          data: {
+            sid: 'fresh-client',
+            status: { exec_info: { queue_remaining: 2 } }
+          }
+        })
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'executing',
+          data: { node: '12' }
+        })
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'feature_flags',
+          data: { supports_progress_text_metadata: true }
+        })
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'custom-message',
+          data: { from: 'extension' }
+        })
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'unknown-message',
+          data: {}
+        })
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'unknown-message',
+          data: {}
+        })
+      })
+    )
+
+    expect(api.clientId).toBe('fresh-client')
+    expect(window.name).toBe('fresh-client')
+    expect(sessionStorage.getItem('clientId')).toBe('fresh-client')
+    expect(status).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: { exec_info: { queue_remaining: 2 } }
+      })
+    )
+    expect(executing).toHaveBeenCalledWith(
+      expect.objectContaining({ detail: '12' })
+    )
+    expect(featureFlags).toHaveBeenCalled()
+    expect(api.serverSupportsFeature('supports_progress_text_metadata')).toBe(
+      true
+    )
+    expect(custom).toHaveBeenCalledWith(
+      expect.objectContaining({ detail: { from: 'extension' } })
+    )
+    expect(api.reportedUnknownMessageTypes.has('unknown-message')).toBe(true)
+    expect(warn).toHaveBeenCalledTimes(1)
+  })
+
+  it('polls status when the initial websocket connection fails', async () => {
+    vi.useFakeTimers()
+    const api = new ComfyApi()
+    const status = vi.fn()
+    vi.spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(
+        jsonResponse({ exec_info: { queue_remaining: 4 } })
+      )
+      .mockRejectedValueOnce(new Error('poll failed'))
+    api.addEventListener('status', status)
+
+    api.init()
+    FakeWebSocket.instances[0].dispatchEvent(new Event('error'))
+    await vi.advanceTimersByTimeAsync(1000)
+    await vi.advanceTimersByTimeAsync(1000)
+
+    expect(status).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: { exec_info: { queue_remaining: 4 } }
+      })
+    )
+    expect(status).toHaveBeenCalledWith(
+      expect.objectContaining({ detail: null })
+    )
+    vi.useRealTimers()
+  })
+
+  it('emits reconnect lifecycle events after an opened websocket closes', async () => {
+    vi.useFakeTimers()
+    const api = new ComfyApi()
+    const status = vi.fn()
+    const reconnecting = vi.fn()
+    const reconnected = vi.fn()
+    api.addEventListener('status', status)
+    api.addEventListener('reconnecting', reconnecting)
+    api.addEventListener('reconnected', reconnected)
+
+    api.init()
+    const socket = FakeWebSocket.instances[0]
+    socket.dispatchEvent(new Event('open'))
+    socket.close()
+
+    expect(status).toHaveBeenCalledWith(
+      expect.objectContaining({ detail: null })
+    )
+    expect(reconnecting).toHaveBeenCalledOnce()
+
+    await vi.advanceTimersByTimeAsync(300)
+    const reconnectSocket = FakeWebSocket.instances[1]
+    reconnectSocket.dispatchEvent(new Event('open'))
+
+    expect(reconnected).toHaveBeenCalledOnce()
+    vi.useRealTimers()
+  })
+
+  it('routes websocket variants without session ids and display-node fallbacks', () => {
+    const api = new ComfyApi()
+    const status = vi.fn()
+    const executing = vi.fn()
+    api.addEventListener('status', status)
+    api.addEventListener('executing', executing)
+    api.init()
+    const socket = FakeWebSocket.instances[0]
+
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'status',
+          data: { status: undefined }
+        })
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: JSON.stringify({
+          type: 'executing',
+          data: { node: 'real', display_node: 'display' }
+        })
+      })
+    )
+
+    expect(status).toHaveBeenCalledWith(
+      expect.objectContaining({ detail: null })
+    )
+    expect(executing).toHaveBeenCalledWith(
+      expect.objectContaining({ detail: 'display' })
+    )
+  })
+
+  it('routes binary preview and progress websocket messages', () => {
+    const api = new ComfyApi()
+    const preview = vi.fn()
+    const previewWithMetadata = vi.fn()
+    const progressText = vi.fn()
+    const encoder = new TextEncoder()
+    api.serverFeatureFlags.value = {
+      supports_progress_text_metadata: true
+    }
+    api.addEventListener('b_preview', preview)
+    api.addEventListener('b_preview_with_metadata', previewWithMetadata)
+    api.addEventListener('progress_text', progressText)
+    api.init()
+    const socket = FakeWebSocket.instances[0]
+
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(1, concatBytes(uint32(2), new Uint8Array([1, 2])))
+      })
+    )
+
+    const promptId = encoder.encode('prompt-1')
+    const nodeId = encoder.encode('7')
+    const progressPayload = concatBytes(
+      uint32(promptId.length),
+      promptId,
+      uint32(nodeId.length),
+      nodeId,
+      encoder.encode('loading')
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(3, progressPayload)
+      })
+    )
+
+    const metadata = encoder.encode(
+      JSON.stringify({
+        image_type: 'image/webp',
+        node_id: '7',
+        display_node_id: '7',
+        parent_node_id: '4',
+        real_node_id: '7',
+        prompt_id: 'prompt-1'
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(
+          4,
+          concatBytes(uint32(metadata.length), metadata, new Uint8Array([9]))
+        )
+      })
+    )
+
+    expect(preview).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: expect.objectContaining({ type: 'image/png' })
+      })
+    )
+    expect(progressText).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: {
+          nodeId: '7',
+          text: 'loading',
+          prompt_id: 'prompt-1'
+        }
+      })
+    )
+    expect(previewWithMetadata).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: expect.objectContaining({
+          nodeId: '7',
+          parentNodeId: '4',
+          jobId: 'prompt-1'
+        })
+      })
+    )
+  })
+
+  it('routes binary jpeg/default previews and malformed binary messages defensively', () => {
+    const api = new ComfyApi()
+    const preview = vi.fn()
+    const progressText = vi.fn()
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined)
+    const encoder = new TextEncoder()
+    api.addEventListener('b_preview', preview)
+    api.addEventListener('progress_text', progressText)
+    api.init()
+    const socket = FakeWebSocket.instances[0]
+
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(1, concatBytes(uint32(1), new Uint8Array([1])))
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(1, concatBytes(uint32(99), new Uint8Array([2])))
+      })
+    )
+
+    const nodeId = encoder.encode('node')
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(
+          3,
+          concatBytes(uint32(nodeId.length), nodeId, encoder.encode('ready'))
+        )
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(3, new Uint8Array([1]))
+      })
+    )
+    socket.dispatchEvent(
+      new MessageEvent('message', {
+        data: binaryMessage(99, new Uint8Array())
+      })
+    )
+
+    expect(preview).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: expect.objectContaining({ type: 'image/jpeg' })
+      })
+    )
+    expect(progressText).toHaveBeenCalledWith(
+      expect.objectContaining({
+        detail: { nodeId: 'node', text: 'ready' }
+      })
+    )
+    expect(warn).toHaveBeenCalled()
+  })
+
+  it('serializes prompt queue options and surfaces non-200 errors', async () => {
+    const api = new ComfyApi()
+    api.clientId = 'client-1'
+    api.authToken = 'token-1'
+    api.apiKey = 'key-1'
+    const prompt: ComfyApiWorkflow = {
+      1: {
+        class_type: 'PreviewAny',
+        inputs: {},
+        _meta: { title: 'PreviewAny' }
+      }
+    }
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse({ prompt_id: 'queued' }))
+      .mockResolvedValueOnce(
+        new Response('backend exploded', {
+          status: 500,
+          statusText: 'Server Error'
+        })
+      )
+
+    await expect(
+      api.queuePrompt(
+        -1,
+        { output: prompt, workflow: createWorkflow() },
+        {
+          partialExecutionTargets: ['7' as NodeExecutionId],
+          previewMethod: 'latent2rgb'
+        }
+      )
+    ).resolves.toEqual({ prompt_id: 'queued' })
+
+    const body = JSON.parse(fetchApi.mock.calls[0][1]?.body as string)
+    expect(body).toMatchObject({
+      client_id: 'client-1',
+      prompt,
+      partial_execution_targets: ['7'],
+      front: true,
+      extra_data: {
+        auth_token_comfy_org: 'token-1',
+        api_key_comfy_org: 'key-1',
+        comfy_usage_source: 'comfyui-frontend',
+        preview_method: 'latent2rgb'
+      }
+    })
+    expect(body.number).toBeUndefined()
+
+    await expect(
+      api.queuePrompt(3, { output: prompt, workflow: createWorkflow() })
+    ).rejects.toMatchObject({ status: 500 })
+  })
+
+  it('omits queue position and default preview method for normal queueing', async () => {
+    const api = new ComfyApi()
+    const prompt: ComfyApiWorkflow = {
+      1: {
+        class_type: 'PreviewAny',
+        inputs: {},
+        _meta: { title: 'PreviewAny' }
+      }
+    }
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockResolvedValue(jsonResponse({ prompt_id: 'queued' }))
+
+    await api.queuePrompt(
+      0,
+      { output: prompt, workflow: createWorkflow() },
+      {
+        previewMethod: 'default'
+      }
+    )
+
+    const body = JSON.parse(fetchApi.mock.calls[0][1]?.body as string)
+    expect(body.front).toBeUndefined()
+    expect(body.number).toBeUndefined()
+    expect(body.extra_data.preview_method).toBeUndefined()
+  })
+
+  it('handles shareable assets, settings, userdata, subgraphs, and memory APIs', async () => {
+    const api = new ComfyApi()
+    const prompt: ComfyApiWorkflow = {
+      1: {
+        class_type: 'PreviewAny',
+        inputs: {},
+        _meta: { title: 'PreviewAny' }
+      }
+    }
+    vi.spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse({ assets: [] }))
+      .mockResolvedValueOnce(jsonResponse({}, { status: 500 }))
+      .mockResolvedValueOnce(
+        new Response('', { status: 401, statusText: 'Unauthorized' })
+      )
+      .mockResolvedValueOnce(jsonResponse({}, { status: 204 }))
+      .mockResolvedValueOnce(jsonResponse([], { status: 404 }))
+      .mockResolvedValueOnce(
+        jsonResponse({}, { status: 500, statusText: 'Server Error' })
+      )
+      .mockResolvedValueOnce(jsonResponse({}, { status: 200 }))
+      .mockResolvedValueOnce(jsonResponse({}, { status: 200 }))
+      .mockResolvedValueOnce(jsonResponse({}, { status: 500 }))
+    vi.spyOn(singletonApi, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse({ data: 'subgraph-data' }))
+      .mockResolvedValueOnce(jsonResponse({ missing: {} }))
+      .mockResolvedValueOnce(jsonResponse({ one: { data: 'inline' } }))
+
+    await expect(
+      api.getShareableAssets(prompt, { owned: false })
+    ).resolves.toEqual({ assets: [] })
+    await expect(api.getShareableAssets(prompt)).rejects.toThrow(
+      'Failed to fetch shareable assets'
+    )
+    await expect(api.getSettings()).rejects.toBeInstanceOf(UnauthorizedError)
+    await expect(
+      api.storeUserData('plain.txt', 'raw', {
+        overwrite: false,
+        stringify: false,
+        throwOnError: false,
+        full_info: true
+      })
+    ).resolves.toHaveProperty('status', 204)
+    await expect(api.listUserDataFullInfo('/missing/')).resolves.toEqual([])
+    await expect(api.listUserDataFullInfo('/broken/')).rejects.toThrow(
+      "Error getting user data list '/broken'"
+    )
+    await expect(api.getGlobalSubgraphData('one')).resolves.toBe(
+      'subgraph-data'
+    )
+    await expect(api.getGlobalSubgraphData('missing')).rejects.toThrow(
+      "Global subgraph 'missing' returned empty data"
+    )
+    await expect(api.getGlobalSubgraphs()).resolves.toEqual({
+      one: { data: 'inline' }
+    })
+    await api.freeMemory({ freeExecutionCache: true })
+    await api.freeMemory({ freeExecutionCache: false })
+    await api.freeMemory({ freeExecutionCache: true })
+    expect(mockToastStore.add).toHaveBeenCalledWith(
+      expect.objectContaining({
+        summary: 'Models and Execution Cache have been cleared.'
+      })
+    )
+    expect(mockToastStore.add).toHaveBeenCalledWith(
+      expect.objectContaining({ summary: 'Models have been unloaded.' })
+    )
+    expect(mockToastStore.add).toHaveBeenCalledWith(
+      expect.objectContaining({
+        summary:
+          'Unloading of models failed. Installed ComfyUI may be an outdated version.'
+      })
+    )
+  })
+
+  it('rejects non-success global subgraph data responses', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(singletonApi, 'fetchApi').mockResolvedValueOnce(
+      jsonResponse({}, { status: 404, statusText: 'Not Found' })
+    )
+
+    await expect(api.getGlobalSubgraphData('missing')).rejects.toThrow(
+      "Failed to fetch global subgraph 'missing': 404 Not Found"
+    )
+  })
+
+  it('handles successful settings and userdata helper request shapes', async () => {
+    const api = new ComfyApi()
+    const fetchApi = vi
+      .spyOn(api, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse({ theme: 'dark' }))
+      .mockResolvedValueOnce(jsonResponse({}, { status: 500 }))
+      .mockResolvedValueOnce(jsonResponse({}, { status: 200 }))
+      .mockResolvedValueOnce(jsonResponse({}, { status: 200 }))
+
+    await expect(api.getSettings()).resolves.toEqual({ theme: 'dark' })
+    await expect(api.storeUserData('bad.json', { a: 1 })).rejects.toThrow(
+      "Error storing user data file 'bad.json'"
+    )
+    await api.moveUserData('old/path.json', 'new path.json')
+    await api.deleteUserData('old/path.json')
+
+    expect(fetchApi.mock.calls[2]).toEqual([
+      '/userdata/old%2Fpath.json/move/new%20path.json?overwrite=false',
+      { method: 'POST' }
+    ])
+    expect(fetchApi.mock.calls[3]).toEqual([
+      '/userdata/old%2Fpath.json',
+      { method: 'DELETE' }
+    ])
+  })
+
+  it('handles global subgraph fallbacks and log endpoints', async () => {
+    const api = new ComfyApi()
+    vi.spyOn(singletonApi, 'fetchApi')
+      .mockResolvedValueOnce(jsonResponse({}, { status: 500 }))
+      .mockResolvedValueOnce(
+        jsonResponse({
+          missing: {
+            name: 'Missing data',
+            info: { node_pack: 'core' }
+          }
+        })
+      )
+      .mockResolvedValueOnce(jsonResponse({ data: 'lazy-data' }))
+    vi.mocked(axios.get)
+      .mockResolvedValueOnce({ data: 'log text', headers: {} })
+      .mockResolvedValueOnce({ data: { logs: [] }, headers: {} })
+      .mockRejectedValueOnce(new Error('no folders'))
+      .mockResolvedValueOnce({
+        data: { checkpoints: ['/models'] },
+        headers: {}
+      })
+    vi.mocked(axios.patch).mockResolvedValue({ data: undefined })
+
+    await expect(api.getGlobalSubgraphs()).resolves.toEqual({})
+    const subgraphs = await api.getGlobalSubgraphs()
+    await expect(subgraphs.missing.data).resolves.toBe('lazy-data')
+    await expect(api.getLogs()).resolves.toBe('log text')
+    await expect(api.getRawLogs()).resolves.toEqual({ logs: [] })
+    await api.subscribeLogs(true)
+    await expect(api.getFolderPaths()).resolves.toEqual({})
+    await expect(api.getFolderPaths()).resolves.toEqual({
+      checkpoints: ['/models']
+    })
+
+    expect(axios.patch).toHaveBeenCalledWith(
+      api.internalURL('/logs/subscribe'),
+      { enabled: true, clientId: undefined }
+    )
+  })
+
+  it('loads localized template indexes and fuse options defensively', async () => {
+    const api = new ComfyApi()
+    vi.mocked(axios.get)
+      .mockResolvedValueOnce({
+        data: [{ name: 'template' }],
+        headers: { 'content-type': 'application/json' }
+      })
+      .mockResolvedValueOnce({
+        data: '<html></html>',
+        headers: { 'content-type': 'text/html' }
+      })
+      .mockRejectedValueOnce(new Error('missing locale'))
+      .mockResolvedValueOnce({
+        data: [{ name: 'fallback' }],
+        headers: { 'content-type': 'application/json' }
+      })
+      .mockRejectedValueOnce(new Error('default missing'))
+      .mockResolvedValueOnce({
+        data: { keys: ['name'] },
+        headers: { 'content-type': 'application/json' }
+      })
+      .mockResolvedValueOnce({
+        data: '<html></html>',
+        headers: { 'content-type': 'text/html' }
+      })
+      .mockResolvedValueOnce({
+        data: { ignored: true },
+        headers: {}
+      })
+    vi.spyOn(console, 'warn').mockImplementation(() => undefined)
+    vi.spyOn(console, 'error').mockImplementation(() => undefined)
+
+    await expect(api.getCoreWorkflowTemplates('fr')).resolves.toEqual([
+      { name: 'template' }
+    ])
+    await expect(api.getCoreWorkflowTemplates()).resolves.toEqual([])
+    await expect(api.getCoreWorkflowTemplates('zh')).resolves.toEqual([
+      { name: 'fallback' }
+    ])
+    await expect(api.getCoreWorkflowTemplates('en')).resolves.toEqual([])
+    await expect(api.getFuseOptions()).resolves.toEqual({ keys: ['name'] })
+    await expect(api.getFuseOptions()).resolves.toBeNull()
+    await expect(api.getFuseOptions()).resolves.toBeNull()
+  })
+})

src/scripts/changeTracker.test.ts

@@ -1,6 +1,12 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
+import type {
+  CanvasPointerEvent,
+  Subgraph
+} from '@/lib/litegraph/src/litegraph'
+import { LGraphCanvas, LiteGraph } from '@/lib/litegraph/src/litegraph'
 import type { ComfyWorkflowJSON } from '@/platform/workflow/validation/schemas/workflowSchema'
+import type { ExecutedWsMessage } from '@/schemas/apiSchema'
 
 const mockAssert = vi.hoisted(() => vi.fn())
 
@@ -14,7 +20,7 @@ const mockNodeOutputStore = vi.hoisted(() => ({
 }))
 
 const mockSubgraphNavigationStore = vi.hoisted(() => ({
-  exportState: vi.fn(() => []),
+  exportState: vi.fn((): string[] => []),
   restoreState: vi.fn()
 }))
 
@@ -23,10 +29,24 @@ const mockWorkflowStore = vi.hoisted(() => ({
   getWorkflowByPath: vi.fn()
 }))
 
+const mockExecutionStore = vi.hoisted(() => ({
+  queuedJobs: {} as Record<string, { workflow: { changeTracker: unknown } }>
+}))
+
+const mockMaskEditorIsOpened = vi.hoisted(() => vi.fn(() => false))
+
 vi.mock('@/scripts/app', () => ({
   app: {
+    constructor: {
+      maskeditor_is_opended: mockMaskEditorIsOpened
+    },
     graph: {},
+    ui: {
+      autoQueueEnabled: false,
+      autoQueueMode: 'instant'
+    },
     rootGraph: {
+      subgraphs: new Map(),
       serialize: vi.fn(() => ({
         nodes: [],
         links: [],
@@ -39,8 +59,10 @@ vi.mock('@/scripts/app', () => ({
       }))
     },
     canvas: {
-      ds: { scale: 1, offset: [0, 0] }
-    }
+      ds: { scale: 1, offset: [0, 0] },
+      setGraph: vi.fn()
+    },
+    loadGraphData: vi.fn()
   }
 }))
 
@@ -65,6 +87,10 @@ vi.mock('@/platform/workflow/management/stores/workflowStore', () => ({
   useWorkflowStore: vi.fn(() => mockWorkflowStore)
 }))
 
+vi.mock('@/stores/executionStore', () => ({
+  useExecutionStore: vi.fn(() => mockExecutionStore)
+}))
+
 import { app } from '@/scripts/app'
 import { api } from '@/scripts/api'
 import { ChangeTracker } from '@/scripts/changeTracker'
@@ -107,13 +133,120 @@ function mockCanvasState(state: ComfyWorkflowJSON) {
   vi.mocked(app.rootGraph.serialize).mockReturnValue(state as never)
 }
 
+type ListenerMap = Record<string, EventListener[]>
+
+function storeListener(
+  listeners: ListenerMap,
+  type: string,
+  listener: EventListenerOrEventListenerObject
+) {
+  if (typeof listener === 'function') {
+    listeners[type] ??= []
+    listeners[type].push(listener)
+  }
+}
+
+function dispatchStored(listeners: ListenerMap, type: string, event: Event) {
+  for (const listener of listeners[type] ?? []) {
+    listener(event)
+  }
+}
+
+async function flushAsyncFrame() {
+  await Promise.resolve()
+  await Promise.resolve()
+}
+
+function getApiListener(name: string) {
+  const call = vi
+    .mocked(api.addEventListener)
+    .mock.calls.find(([eventName]) => eventName === name)
+  expect(call).toBeDefined()
+  return call?.[1] as (event: CustomEvent<ExecutedWsMessage>) => void
+}
+
 describe('ChangeTracker', () => {
   beforeEach(() => {
     vi.clearAllMocks()
     nodeIdCounter = 0
     ChangeTracker.isLoadingGraph = false
+    Reflect.set(ChangeTracker, '_checkStateWarned', false)
     mockWorkflowStore.activeWorkflow = null
     mockWorkflowStore.getWorkflowByPath.mockReturnValue(null)
+    mockExecutionStore.queuedJobs = {}
+    mockMaskEditorIsOpened.mockReturnValue(false)
+    app.ui.autoQueueEnabled = false
+    app.ui.autoQueueMode = 'instant'
+    vi.mocked(app.canvas.setGraph).mockClear()
+    vi.mocked(app.loadGraphData).mockResolvedValue(undefined)
+    app.rootGraph.subgraphs.clear()
+    app.canvas.ds.scale = 1
+    app.canvas.ds.offset = [0, 0]
+  })
+
+  describe('reset', () => {
+    it('updates initialState from activeState or an explicit state', () => {
+      const tracker = createTracker(createState(1))
+      const changed = createState(2)
+
+      tracker.activeState = changed
+      tracker.reset()
+
+      expect(tracker.initialState).toEqual(changed)
+      expect(tracker.initialState).not.toBe(changed)
+
+      const explicit = createState(3)
+      tracker.reset(explicit)
+
+      expect(tracker.activeState).toEqual(explicit)
+      expect(tracker.activeState).not.toBe(explicit)
+      expect(tracker.initialState).toEqual(explicit)
+    })
+
+    it('does not reset while restoring state', () => {
+      const tracker = createTracker(createState(1))
+      const original = tracker.initialState
+      tracker._restoringState = true
+
+      tracker.reset(createState(2))
+
+      expect(tracker.initialState).toBe(original)
+    })
+  })
+
+  describe('restore', () => {
+    it('restores viewport, outputs, and root graph navigation', () => {
+      const tracker = createTracker()
+      app.canvas.ds.scale = 2
+      app.canvas.ds.offset = [10, 20]
+      mockNodeOutputStore.snapshotOutputs.mockReturnValue({ 1: { images: [] } })
+      mockSubgraphNavigationStore.exportState.mockReturnValue([])
+
+      tracker.store()
+      app.canvas.ds.scale = 1
+      app.canvas.ds.offset = [0, 0]
+      tracker.restore()
+
+      expect(app.canvas.ds.scale).toBe(2)
+      expect(app.canvas.ds.offset).toEqual([10, 20])
+      expect(mockNodeOutputStore.restoreOutputs).toHaveBeenCalledWith({
+        1: { images: [] }
+      })
+      expect(mockSubgraphNavigationStore.restoreState).toHaveBeenCalledWith([])
+      expect(app.canvas.setGraph).toHaveBeenCalledWith(app.rootGraph)
+    })
+
+    it('restores saved subgraph navigation when the subgraph exists', () => {
+      const tracker = createTracker()
+      const subgraph = { id: 'subgraph-1' } as unknown as Subgraph
+      app.rootGraph.subgraphs.set('subgraph-1', subgraph)
+      mockSubgraphNavigationStore.exportState.mockReturnValue(['subgraph-1'])
+
+      tracker.store()
+      tracker.restore()
+
+      expect(app.canvas.setGraph).toHaveBeenCalledWith(subgraph)
+    })
   })
 
   describe('captureCanvasState', () => {
@@ -169,9 +302,32 @@ describe('ChangeTracker', () => {
           expect.stringContaining('captureCanvasState')
         )
       })
+
+      it('reports inactive tracker calls only once for the same workflow', () => {
+        const tracker = createTracker()
+        tracker.workflow.path = '/test/dedupe-workflow.json'
+        mockWorkflowStore.activeWorkflow = { changeTracker: {} }
+
+        tracker.captureCanvasState()
+        tracker.captureCanvasState()
+
+        expect(mockAssert).toHaveBeenCalledOnce()
+      })
     })
 
     describe('state capture', () => {
+      it('sets the active state without pushing undo when none exists yet', () => {
+        const tracker = createTracker(createState(1))
+        const changed = createState(2)
+        tracker.activeState = undefined as never
+        mockCanvasState(changed)
+
+        tracker.captureCanvasState()
+
+        expect(tracker.activeState).toEqual(changed)
+        expect(tracker.undoQueue).toHaveLength(0)
+      })
+
       it('pushes to undoQueue, updates activeState, and calls updateModified', () => {
         const initial = createState(1)
         const tracker = createTracker(initial)
@@ -238,6 +394,19 @@ describe('ChangeTracker', () => {
 
         expect(tracker.undoQueue).toHaveLength(ChangeTracker.MAX_HISTORY)
       })
+
+      it('does not capture until the outer change transaction finishes', () => {
+        const tracker = createTracker(createState(1))
+        tracker.beforeChange()
+        tracker.beforeChange()
+        mockCanvasState(createState(2))
+
+        tracker.afterChange()
+        expect(app.rootGraph.serialize).not.toHaveBeenCalled()
+
+        tracker.afterChange()
+        expect(app.rootGraph.serialize).toHaveBeenCalledOnce()
+      })
     })
   })
 
@@ -302,6 +471,105 @@ describe('ChangeTracker', () => {
     })
   })
 
+  describe('updateModified', () => {
+    it('updates workflow modified state when the store can find it', () => {
+      const state = createState(1)
+      const tracker = createTracker(state)
+      const workflow = { isModified: true }
+      mockWorkflowStore.getWorkflowByPath.mockReturnValue(workflow)
+
+      tracker.updateModified()
+      expect(workflow.isModified).toBe(false)
+
+      tracker.activeState = createState(2)
+      tracker.updateModified()
+      expect(workflow.isModified).toBe(true)
+    })
+  })
+
+  describe('undo and redo', () => {
+    it('restores previous state and moves the current state to the target queue', async () => {
+      const initial = createState(1)
+      const changed = createState(2)
+      const tracker = createTracker(changed)
+      tracker.undoQueue.push(initial)
+
+      await tracker.undo()
+
+      expect(app.loadGraphData).toHaveBeenCalledWith(
+        initial,
+        false,
+        false,
+        tracker.workflow,
+        {
+          checkForRerouteMigration: false,
+          silentAssetErrors: true
+        }
+      )
+      expect(tracker.activeState).toBe(initial)
+      expect(tracker.redoQueue).toEqual([changed])
+      expect(tracker._restoringState).toBe(false)
+    })
+
+    it('clears restoring state when loading fails', async () => {
+      const tracker = createTracker(createState(2))
+      tracker.undoQueue.push(createState(1))
+      vi.mocked(app.loadGraphData).mockRejectedValueOnce(
+        new Error('load failed')
+      )
+
+      await expect(tracker.undo()).rejects.toThrow('load failed')
+
+      expect(tracker._restoringState).toBe(false)
+    })
+
+    it('does nothing when no previous state exists', async () => {
+      const tracker = createTracker(createState(1))
+
+      await tracker.undo()
+
+      expect(app.loadGraphData).not.toHaveBeenCalled()
+    })
+
+    it('handles keyboard undo and redo shortcuts', async () => {
+      const tracker = createTracker()
+      const undo = vi.spyOn(tracker, 'undo').mockResolvedValue()
+      const redo = vi.spyOn(tracker, 'redo').mockResolvedValue()
+
+      await expect(
+        tracker.undoRedo(
+          new KeyboardEvent('keydown', { key: 'z', ctrlKey: true })
+        )
+      ).resolves.toBe(true)
+      await expect(
+        tracker.undoRedo(
+          new KeyboardEvent('keydown', {
+            key: 'z',
+            ctrlKey: true,
+            shiftKey: true
+          })
+        )
+      ).resolves.toBe(true)
+      await expect(
+        tracker.undoRedo(
+          new KeyboardEvent('keydown', { key: 'y', metaKey: true })
+        )
+      ).resolves.toBe(true)
+      await expect(
+        tracker.undoRedo(
+          new KeyboardEvent('keydown', {
+            key: 'z',
+            ctrlKey: true,
+            altKey: true
+          })
+        )
+      ).resolves.toBeUndefined()
+
+      expect(undo).toHaveBeenCalledOnce()
+      expect(redo).toHaveBeenCalledTimes(2)
+    })
+  })
+
   describe('checkState (deprecated)', () => {
     it('delegates to captureCanvasState', () => {
       const tracker = createTracker(createState(1))
@@ -312,5 +580,389 @@ describe('ChangeTracker', () => {
 
       expect(tracker.activeState).toEqual(changed)
     })
+
+    it('warns only once before delegating', () => {
+      const tracker = createTracker(createState(1))
+      const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined)
+
+      tracker.checkState()
+      tracker.checkState()
+
+      expect(warn).toHaveBeenCalledOnce()
+      warn.mockRestore()
+    })
+  })
+
+  describe('bindInput', () => {
+    it('returns false for missing canvas or body elements', () => {
+      expect(ChangeTracker.bindInput(null)).toBe(false)
+      expect(ChangeTracker.bindInput(document.createElement('canvas'))).toBe(
+        false
+      )
+      expect(ChangeTracker.bindInput(document.body)).toBe(false)
+    })
+
+    it('captures state once when an input-like element changes', () => {
+      const tracker = createTracker()
+      const capture = vi.spyOn(tracker, 'captureCanvasState')
+      const input = document.createElement('input')
+
+      expect(ChangeTracker.bindInput(input)).toBe(true)
+      input.dispatchEvent(new Event('change'))
+      input.dispatchEvent(new Event('change'))
+
+      expect(capture).toHaveBeenCalledOnce()
+    })
+
+    it('binds textarea-like elements that expose an input handler slot', () => {
+      const tracker = createTracker()
+      const capture = vi.spyOn(tracker, 'captureCanvasState')
+      const element = document.createElement('div') as HTMLElement & {
+        oninput: unknown
+      }
+      element.oninput = null
+
+      expect(ChangeTracker.bindInput(element)).toBe(true)
+      element.dispatchEvent(new Event('change'))
+
+      expect(capture).toHaveBeenCalledOnce()
+    })
+  })
+
+  describe('init', () => {
+    it('captures changes from registered browser, graph, and API events', async () => {
+      const windowListeners: ListenerMap = {}
+      const documentListeners: ListenerMap = {}
+      const windowAddSpy = vi
+        .spyOn(window, 'addEventListener')
+        .mockImplementation((type, listener) => {
+          storeListener(windowListeners, type, listener)
+        })
+      const documentAddSpy = vi
+        .spyOn(document, 'addEventListener')
+        .mockImplementation((type, listener) => {
+          storeListener(documentListeners, type, listener)
+        })
+      const rafSpy = vi
+        .spyOn(window, 'requestAnimationFrame')
+        .mockImplementation((callback) => {
+          callback(0)
+          return 1
+        })
+
+      const processMouseUp = vi.fn(() => true)
+      const prompt = vi.fn()
+      const close = vi.fn(() => true)
+      const originalProcessMouseUp = LGraphCanvas.prototype.processMouseUp
+      const originalPrompt = LGraphCanvas.prototype.prompt
+      const originalClose = LiteGraph.ContextMenu.prototype.close
+
+      LGraphCanvas.prototype.processMouseUp = processMouseUp
+      LGraphCanvas.prototype.prompt = prompt
+      LiteGraph.ContextMenu.prototype.close = close
+
+      try {
+        ChangeTracker.init()
+        const tracker = createTracker()
+        const capture = vi.spyOn(tracker, 'captureCanvasState')
+
+        dispatchStored(windowListeners, 'mouseup', new MouseEvent('mouseup'))
+        getApiListener('promptQueued')(
+          new CustomEvent('promptQueued', {
+            detail: {} as unknown as ExecutedWsMessage
+          })
+        )
+        getApiListener('graphCleared')(
+          new CustomEvent('graphCleared', {
+            detail: {} as unknown as ExecutedWsMessage
+          })
+        )
+        dispatchStored(
+          documentListeners,
+          'litegraph:canvas',
+          new CustomEvent('litegraph:canvas', {
+            detail: { subType: 'before-change' }
+          })
+        )
+        dispatchStored(
+          documentListeners,
+          'litegraph:canvas',
+          new CustomEvent('litegraph:canvas', {
+            detail: { subType: 'after-change' }
+          })
+        )
+
+        expect(capture).toHaveBeenCalledTimes(4)
+
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'Control' })
+        )
+        await flushAsyncFrame()
+        dispatchStored(windowListeners, 'keyup', new KeyboardEvent('keyup'))
+
+        expect(capture).toHaveBeenCalledTimes(5)
+
+        const undoRedo = vi.spyOn(tracker, 'undoRedo').mockResolvedValue(true)
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'z', ctrlKey: true })
+        )
+        await flushAsyncFrame()
+
+        expect(undoRedo).toHaveBeenCalledOnce()
+        expect(capture).toHaveBeenCalledTimes(5)
+
+        undoRedo.mockResolvedValue(undefined)
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'a' })
+        )
+        await flushAsyncFrame()
+
+        expect(capture).toHaveBeenCalledTimes(6)
+
+        const input = document.createElement('input')
+        document.body.append(input)
+        input.focus()
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'b' })
+        )
+        await flushAsyncFrame()
+        input.remove()
+
+        expect(capture).toHaveBeenCalledTimes(6)
+
+        mockMaskEditorIsOpened.mockReturnValue(true)
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'c' })
+        )
+        await flushAsyncFrame()
+
+        expect(capture).toHaveBeenCalledTimes(6)
+
+        const canvas = {} as LGraphCanvas
+        LGraphCanvas.prototype.processMouseUp.call(
+          canvas,
+          new MouseEvent('mouseup') as CanvasPointerEvent
+        )
+
+        expect(processMouseUp).toHaveBeenCalledOnce()
+        expect(capture).toHaveBeenCalledTimes(7)
+
+        const promptCallback = vi.fn()
+        LGraphCanvas.prototype.prompt.call(
+          canvas,
+          'title',
+          'value',
+          promptCallback,
+          new MouseEvent('mouseup') as CanvasPointerEvent
+        )
+        const extendedCallback = prompt.mock.calls[0]?.[2] as
+          | ((value: string) => void)
+          | undefined
+        extendedCallback?.('updated')
+
+        expect(promptCallback).toHaveBeenCalledWith('updated')
+        expect(capture).toHaveBeenCalledTimes(8)
+
+        LiteGraph.ContextMenu.prototype.close.call(
+          {} as InstanceType<typeof LiteGraph.ContextMenu>,
+          new MouseEvent('mouseup')
+        )
+
+        expect(close).toHaveBeenCalledOnce()
+        expect(capture).toHaveBeenCalledTimes(9)
+      } finally {
+        LGraphCanvas.prototype.processMouseUp = originalProcessMouseUp
+        LGraphCanvas.prototype.prompt = originalPrompt
+        LiteGraph.ContextMenu.prototype.close = originalClose
+        windowAddSpy.mockRestore()
+        documentAddSpy.mockRestore()
+        rafSpy.mockRestore()
+      }
+    })
+
+    it('ignores repeat keydowns and missing active trackers', async () => {
+      const windowListeners: ListenerMap = {}
+      const windowAddSpy = vi
+        .spyOn(window, 'addEventListener')
+        .mockImplementation((type, listener) => {
+          storeListener(windowListeners, type, listener)
+        })
+      const documentAddSpy = vi
+        .spyOn(document, 'addEventListener')
+        .mockImplementation(() => undefined)
+      const rafSpy = vi
+        .spyOn(window, 'requestAnimationFrame')
+        .mockImplementation((callback) => {
+          callback(0)
+          return 1
+        })
+
+      try {
+        ChangeTracker.init()
+        const tracker = createTracker()
+        const capture = vi.spyOn(tracker, 'captureCanvasState')
+
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'x', repeat: true })
+        )
+        await flushAsyncFrame()
+        expect(capture).not.toHaveBeenCalled()
+
+        mockWorkflowStore.activeWorkflow = null
+        dispatchStored(
+          windowListeners,
+          'keydown',
+          new KeyboardEvent('keydown', { key: 'x' })
+        )
+        await flushAsyncFrame()
+        expect(capture).not.toHaveBeenCalled()
+      } finally {
+        windowAddSpy.mockRestore()
+        documentAddSpy.mockRestore()
+        rafSpy.mockRestore()
+      }
+    })
+
+    it('stores executed outputs for the workflow that owns the prompt', () => {
+      ChangeTracker.init()
+      const tracker = createTracker()
+      const executed = getApiListener('executed')
+      mockExecutionStore.queuedJobs = {
+        promptA: { workflow: { changeTracker: tracker } }
+      }
+
+      executed(
+        new CustomEvent('executed', {
+          detail: {
+            prompt_id: 'promptA',
+            node: '1',
+            output: { images: ['first'] }
+          } as unknown as ExecutedWsMessage
+        })
+      )
+      executed(
+        new CustomEvent('executed', {
+          detail: {
+            prompt_id: 'promptA',
+            node: '1',
+            merge: true,
+            output: { images: ['second'], text: ['caption'] }
+          } as unknown as ExecutedWsMessage
+        })
+      )
+      executed(
+        new CustomEvent('executed', {
+          detail: {
+            prompt_id: 'missing',
+            node: '2',
+            output: { images: ['ignored'] }
+          } as unknown as ExecutedWsMessage
+        })
+      )
+
+      expect(tracker.nodeOutputs).toEqual({
+        1: { images: ['first', 'second'], text: ['caption'] }
+      })
+    })
+
+    it('replaces non-array executed outputs during merge updates', () => {
+      ChangeTracker.init()
+      const tracker = createTracker()
+      const executed = getApiListener('executed')
+      mockExecutionStore.queuedJobs = {
+        promptA: { workflow: { changeTracker: tracker } }
+      }
+
+      executed(
+        new CustomEvent('executed', {
+          detail: {
+            prompt_id: 'promptA',
+            node: '1',
+            output: { value: 'old' }
+          } as unknown as ExecutedWsMessage
+        })
+      )
+      executed(
+        new CustomEvent('executed', {
+          detail: {
+            prompt_id: 'promptA',
+            node: '1',
+            merge: true,
+            output: { value: 'new' }
+          } as unknown as ExecutedWsMessage
+        })
+      )
+
+      expect(tracker.nodeOutputs).toEqual({
+        1: { value: 'new' }
+      })
+    })
+  })
+
+  describe('graphEqual', () => {
+    it('compares workflow nodes as an unordered set and ignores extra.ds', () => {
+      const first = createState(2)
+      const second = {
+        ...createState(),
+        nodes: [...first.nodes].reverse(),
+        links: first.links,
+        groups: first.groups,
+        extra: { ds: { scale: 2 } }
+      } as unknown as ComfyWorkflowJSON
+
+      expect(ChangeTracker.graphEqual(first, first)).toBe(true)
+      expect(ChangeTracker.graphEqual(first, second)).toBe(true)
+    })
+
+    it('returns false for non-object values and meaningful graph differences', () => {
+      const first = createState(1)
+      const differentNodes = createState(2)
+      const differentLinks = {
+        ...first,
+        links: [[1, 1, 0, 2, 0, 'MODEL']]
+      } as unknown as ComfyWorkflowJSON
+
+      expect(ChangeTracker.graphEqual(first, null as never)).toBe(false)
+      expect(ChangeTracker.graphEqual(first, differentNodes)).toBe(false)
+      expect(ChangeTracker.graphEqual(first, differentLinks)).toBe(false)
+    })
+
+    it('returns false for extra properties other than viewport state', () => {
+      const first = createState()
+      const second = {
+        ...first,
+        extra: { custom: true }
+      } as unknown as ComfyWorkflowJSON
+
+      expect(ChangeTracker.graphEqual(first, second)).toBe(false)
+    })
+
+    it.each([
+      'floatingLinks',
+      'reroutes',
+      'groups',
+      'definitions',
+      'subgraphs'
+    ] as const)('returns false when %s differs', (key) => {
+      const first = createState()
+      const second = {
+        ...first,
+        [key]: [{ id: 1 }]
+      } as unknown as ComfyWorkflowJSON
+
+      expect(ChangeTracker.graphEqual(first, second)).toBe(false)
+    })
   })
 })

src/scripts/domWidget.test.ts

@@ -1,11 +1,24 @@
 import { describe, expect, test, vi } from 'vitest'
 
+import type { LGraph } from '@/lib/litegraph/src/litegraph'
 import { LGraphNode } from '@/lib/litegraph/src/litegraph'
-import { ComponentWidgetImpl, DOMWidgetImpl } from '@/scripts/domWidget'
+import {
+  addWidget,
+  ComponentWidgetImpl,
+  DOMWidgetImpl,
+  isComponentWidget,
+  isDOMWidget
+} from '@/scripts/domWidget'
+
+const { registerWidget, unregisterWidget } = vi.hoisted(() => ({
+  registerWidget: vi.fn(),
+  unregisterWidget: vi.fn()
+}))
 
 vi.mock('@/stores/domWidgetStore', () => ({
   useDomWidgetStore: () => ({
-    unregisterWidget: vi.fn()
+    registerWidget,
+    unregisterWidget
   })
 }))
 
@@ -24,13 +37,11 @@ describe('DOMWidget Y Position Preservation', () => {
       options: {}
     })
 
-    // Set a specific Y position
     originalWidget.y = 66
 
     const newNode = new LGraphNode('new-node')
     const clonedWidget = originalWidget.createCopyForNode(newNode)
 
-    // Verify Y position is preserved
     expect(clonedWidget.y).toBe(66)
     expect(clonedWidget.node).toBe(newNode)
     expect(clonedWidget.name).toBe('test-widget')
@@ -48,13 +59,11 @@ describe('DOMWidget Y Position Preservation', () => {
       options: {}
     })
 
-    // Set a specific Y position
     originalWidget.y = 42
 
     const newNode = new LGraphNode('new-node')
     const clonedWidget = originalWidget.createCopyForNode(newNode)
 
-    // Verify Y position is preserved
     expect(clonedWidget.y).toBe(42)
     expect(clonedWidget.node).toBe(newNode)
     expect(clonedWidget.element).toBe(mockElement)
@@ -71,11 +80,9 @@ describe('DOMWidget Y Position Preservation', () => {
       options: {}
     })
 
-    // Don't explicitly set Y (should be 0 by default)
     const newNode = new LGraphNode('new-node')
     const clonedWidget = originalWidget.createCopyForNode(newNode)
 
-    // Verify Y position is preserved (should be 0)
     expect(clonedWidget.y).toBe(0)
   })
 })
@@ -96,3 +103,271 @@ describe('BaseDOMWidgetImpl.isVisible', () => {
     expect(widget.isVisible()).toBe(false)
   })
 })
+
+describe('DOMWidgetImpl', () => {
+  test('identifies DOM and component widgets', () => {
+    const node = new LGraphNode('test-node')
+    const domWidget = new DOMWidgetImpl({
+      node,
+      name: 'dom',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {}
+    })
+    const componentWidget = new ComponentWidgetImpl({
+      node,
+      name: 'component',
+      component: { template: '<div />' },
+      inputSpec: { name: 'component', type: 'STRING' },
+      options: {}
+    })
+
+    expect(isDOMWidget(domWidget)).toBe(true)
+    expect(isDOMWidget(componentWidget)).toBe(false)
+    expect(isComponentWidget(componentWidget)).toBe(true)
+    expect(isComponentWidget(domWidget)).toBe(false)
+  })
+
+  test('uses option-backed values, callbacks, and margins', () => {
+    const node = new LGraphNode('test-node')
+    let value = 'initial'
+    const setValue = vi.fn((next: string) => {
+      value = next
+    })
+    const callback = vi.fn()
+    const widget = new DOMWidgetImpl({
+      node,
+      name: 'text',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        getValue: () => value,
+        setValue,
+        margin: 4
+      }
+    })
+    widget.callback = callback
+
+    widget.value = 'next'
+
+    expect(widget.value).toBe('next')
+    expect(widget.margin).toBe(4)
+    expect(setValue).toHaveBeenCalledWith('next')
+    expect(callback).toHaveBeenCalledWith('next')
+  })
+
+  test('uses default value and margin when options do not provide them', () => {
+    const node = new LGraphNode('test-node')
+    const widget = new DOMWidgetImpl({
+      node,
+      name: 'text',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {}
+    })
+
+    expect(widget.value).toBe('')
+    expect(widget.margin).toBe(10)
+  })
+
+  test('draws zoom placeholders and delegates visible draws', () => {
+    const node = new LGraphNode('test-node')
+    vi.spyOn(node, 'isWidgetVisible').mockReturnValue(true)
+    const onDraw = vi.fn()
+    const widget = new DOMWidgetImpl({
+      node,
+      name: 'text',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        hideOnZoom: true,
+        margin: 5,
+        onDraw
+      }
+    })
+    const ctx = {
+      beginPath: vi.fn(),
+      fill: vi.fn(),
+      fillStyle: '#000',
+      rect: vi.fn()
+    } as unknown as CanvasRenderingContext2D
+
+    widget.draw(ctx, node, 100, 10, 40, true)
+
+    expect(ctx.rect).toHaveBeenCalledWith(5, 15, 90, 30)
+    expect(ctx.fill).toHaveBeenCalledOnce()
+    expect(ctx.fillStyle).toBe('#000')
+    expect(onDraw).toHaveBeenCalledWith(widget)
+  })
+
+  test('skips placeholder drawing when hidden', () => {
+    const node = new LGraphNode('test-node')
+    vi.spyOn(node, 'isWidgetVisible').mockReturnValue(false)
+    const onDraw = vi.fn()
+    const widget = new DOMWidgetImpl({
+      node,
+      name: 'text',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        hideOnZoom: true,
+        onDraw
+      }
+    })
+    const ctx = {
+      beginPath: vi.fn(),
+      fill: vi.fn(),
+      fillStyle: '#000',
+      rect: vi.fn()
+    } as unknown as CanvasRenderingContext2D
+
+    widget.draw(ctx, node, 100, 10, 40, true)
+
+    expect(ctx.rect).not.toHaveBeenCalled()
+    expect(onDraw).toHaveBeenCalledWith(widget)
+  })
+
+  test('computes hidden, option, percent, and fallback layout sizes', () => {
+    const node = new LGraphNode('test-node')
+    node.size = [100, 200]
+    const hiddenWidget = new DOMWidgetImpl({
+      node,
+      name: 'hidden',
+      type: 'hidden',
+      element: document.createElement('textarea'),
+      options: {}
+    })
+    const optionWidget = new DOMWidgetImpl({
+      node,
+      name: 'option',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        getMinHeight: () => 11,
+        getMaxHeight: () => 88,
+        getHeight: () => 44
+      }
+    })
+    const percentWidget = new DOMWidgetImpl({
+      node,
+      name: 'percent',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        getMinHeight: () => 10,
+        getMaxHeight: () => 60,
+        getHeight: () => '25%'
+      }
+    })
+    const fallbackWidget = new DOMWidgetImpl({
+      node,
+      name: 'fallback',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        getHeight: () => 40
+      }
+    })
+
+    expect(hiddenWidget.computeLayoutSize(node)).toEqual({
+      minHeight: 0,
+      maxHeight: 0,
+      minWidth: 0
+    })
+    expect(optionWidget.computeLayoutSize(node)).toEqual({
+      minHeight: 11,
+      maxHeight: 88,
+      minWidth: 0
+    })
+    expect(percentWidget.computeLayoutSize(node)).toEqual({
+      minHeight: 10,
+      maxHeight: 60,
+      minWidth: 0
+    })
+    expect(fallbackWidget.computeLayoutSize(node)).toEqual({
+      minHeight: 40,
+      maxHeight: undefined,
+      minWidth: 0
+    })
+  })
+
+  test('registers widgets immediately and through node lifecycle callbacks', () => {
+    registerWidget.mockClear()
+    unregisterWidget.mockClear()
+    const node = new LGraphNode('test-node')
+    node.graph = {} as LGraph
+    const beforeResize = vi.fn()
+    const afterResize = vi.fn()
+    const widget = new DOMWidgetImpl({
+      node,
+      name: 'text',
+      type: 'text',
+      element: document.createElement('textarea'),
+      options: {
+        beforeResize,
+        afterResize
+      }
+    })
+    vi.spyOn(node, 'addCustomWidget')
+
+    addWidget(node, widget)
+    node.onAdded?.(node.graph)
+    node.onResize?.([0, 0])
+    node.onRemoved?.()
+
+    expect(node.addCustomWidget).toHaveBeenCalledWith(widget)
+    expect(registerWidget).toHaveBeenCalledWith(widget)
+    expect(registerWidget).toHaveBeenCalledTimes(2)
+    expect(beforeResize).toHaveBeenCalledWith(node)
+    expect(afterResize).toHaveBeenCalledWith(node)
+    expect(unregisterWidget).toHaveBeenCalledWith(widget.id)
+  })
+
+  test('computes component layout and serializes raw values', () => {
+    const node = new LGraphNode('test-node')
+    const value = { nested: true }
+    const widget = new ComponentWidgetImpl({
+      node,
+      name: 'component',
+      component: { template: '<div />' },
+      inputSpec: { name: 'component', type: 'STRING' },
+      options: {
+        getValue: () => value,
+        getMinHeight: () => 12,
+        getMaxHeight: () => 48
+      }
+    })
+
+    expect(widget.computeLayoutSize()).toEqual({
+      minHeight: 12,
+      maxHeight: 48,
+      minWidth: 0
+    })
+    expect(widget.serializeValue()).toEqual({ nested: true })
+  })
+
+  test('adds DOM widgets through LGraphNode prototype helper', () => {
+    const node = new LGraphNode('test-node')
+    const element = document.createElement('textarea')
+    let value = 'initial'
+    const setValue = vi.fn((next: string) => {
+      value = next
+    })
+    vi.spyOn(node, 'addCustomWidget')
+
+    const widget = node.addDOMWidget('text', 'textarea', element, {
+      getValue: () => value,
+      setValue
+    })
+    const callback = vi.fn()
+    widget.callback = callback
+    widget.value = 'next'
+
+    expect(node.addCustomWidget).toHaveBeenCalledWith(widget)
+    expect(widget.element).toBe(element)
+    expect(widget.options.hideOnZoom).toBe(true)
+    expect(widget.value).toBe('next')
+    expect(setValue).toHaveBeenCalledWith('next')
+    expect(callback).toHaveBeenCalledWith('next')
+  })
+})

src/scripts/errorNodeWidgets.test.ts

@@ -0,0 +1,106 @@
+import { fromAny, fromPartial } from '@total-typescript/shoehorn'
+import { describe, expect, it, vi } from 'vitest'
+
+import { LGraphNode } from '@/lib/litegraph/src/litegraph'
+import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets'
+
+interface TestWidgetOptions {
+  name: string
+  type: string
+  default?: unknown
+  multiline?: boolean
+}
+
+function createWidgetFactory() {
+  return (node: LGraphNode, options: TestWidgetOptions): IBaseWidget => {
+    const widget: IBaseWidget = fromAny({
+      name: options.name,
+      type: options.type,
+      value: options.default,
+      options
+    })
+    node.widgets = [...(node.widgets ?? []), widget]
+    return widget
+  }
+}
+
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useStringWidget',
+  () => ({
+    useStringWidget: () => createWidgetFactory()
+  })
+)
+
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useFloatWidget',
+  () => ({
+    useFloatWidget: () => createWidgetFactory()
+  })
+)
+
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useBooleanWidget',
+  () => ({
+    useBooleanWidget: () => createWidgetFactory()
+  })
+)
+
+import './errorNodeWidgets'
+
+describe('errorNodeWidgets', () => {
+  it('restores widgets from serialized values on error nodes', () => {
+    const node = new LGraphNode('BrokenNode')
+    const longText = 'serialized value with more than twenty chars'
+    node.has_errors = true
+
+    node.onConfigure?.(
+      fromAny({
+        widgets_values: {
+          length: 5,
+          0: 'short text',
+          1: longText,
+          2: 12,
+          3: true,
+          4: { nested: 'value' }
+        }
+      })
+    )
+
+    expect(node.widgets).toHaveLength(5)
+    expect(node.widgets?.map((widget) => widget.name)).toEqual([
+      'UNKNOWN',
+      'UNKNOWN_1',
+      'UNKNOWN_2',
+      'UNKNOWN_3',
+      'UNKNOWN_4'
+    ])
+    expect(node.widgets?.map((widget) => widget.label)).toEqual([
+      'UNKNOWN',
+      'UNKNOWN',
+      'UNKNOWN',
+      'UNKNOWN',
+      'UNKNOWN'
+    ])
+    expect(node.widgets?.map((widget) => widget.value)).toEqual([
+      'short text',
+      longText,
+      12,
+      true,
+      '{"nested":"value"}'
+    ])
+    expect(node.serialize_widgets).toBe(true)
+  })
+
+  it('leaves normal nodes unchanged', () => {
+    const node = new LGraphNode('HealthyNode')
+
+    node.onConfigure?.(
+      fromPartial({
+        widgets_values: ['ignored']
+      })
+    )
+
+    expect(node.widgets).toBeUndefined()
+    expect(node.serialize_widgets).toBeUndefined()
+  })
+})

src/scripts/metadata/avif.test.ts

@@ -7,7 +7,8 @@ import {
   EXPECTED_PROMPT_NAN_COERCED,
   EXPECTED_WORKFLOW,
   mockFileReaderAbort,
-  mockFileReaderError
+  mockFileReaderError,
+  mockFileReaderResult
 } from './__fixtures__/helpers'
 import { getFromAvifFile } from './avif'
 
@@ -83,6 +84,11 @@ describe('AVIF metadata', () => {
       mockFileReaderAbort('readAsArrayBuffer')
       expect(await getFromAvifFile(file)).toEqual({})
     })
+
+    it('resolves empty when the FileReader load has no result', async () => {
+      mockFileReaderResult('readAsArrayBuffer', null)
+      expect(await getFromAvifFile(file)).toEqual({})
+    })
   })
 })
 
@@ -139,7 +145,8 @@ const buildInfeBox = (
   itemType: string,
   version = 2
 ): Uint8Array => {
-  const bodySize = 4 + 2 + 2 + 4 + 1 + 1
+  const itemIdSize = version === 2 ? 2 : version >= 3 ? 4 : 0
+  const bodySize = 4 + itemIdSize + (version >= 2 ? 2 + 4 + 1 + 1 : 0)
   const totalSize = 8 + bodySize
   const buf = new Uint8Array(totalSize)
   const dv = new DataView(buf.buffer)
@@ -147,22 +154,36 @@ const buildInfeBox = (
   buf.set(new TextEncoder().encode('infe'), 4)
   buf[8] = version
   if (version >= 2) {
-    setU16BE(dv, 12, itemId)
-    setU16BE(dv, 14, 0)
-    buf.set(new TextEncoder().encode(itemType.padEnd(4).slice(0, 4)), 16)
+    let p = 12
+    if (version === 2) {
+      setU16BE(dv, p, itemId)
+      p += 2
+    } else {
+      setU32BE(dv, p, itemId)
+      p += 4
+    }
+    setU16BE(dv, p, 0)
+    p += 2
+    buf.set(new TextEncoder().encode(itemType.padEnd(4).slice(0, 4)), p)
   }
   return buf
 }
 
-const buildIinfBox = (infeBoxes: Uint8Array[]): Uint8Array => {
-  const bodySize = 4 + 2 + infeBoxes.reduce((s, b) => s + b.length, 0)
+const buildIinfBox = (infeBoxes: Uint8Array[], version = 0): Uint8Array => {
+  const countSize = version === 0 ? 2 : 4
+  const bodySize = 4 + countSize + infeBoxes.reduce((s, b) => s + b.length, 0)
   const totalSize = 8 + bodySize
   const buf = new Uint8Array(totalSize)
   const dv = new DataView(buf.buffer)
   setU32BE(dv, 0, totalSize)
   buf.set(new TextEncoder().encode('iinf'), 4)
-  setU16BE(dv, 12, infeBoxes.length)
-  let off = 14
+  buf[8] = version
+  if (version === 0) {
+    setU16BE(dv, 12, infeBoxes.length)
+  } else {
+    setU32BE(dv, 12, infeBoxes.length)
+  }
+  let off = 8 + 4 + countSize
   for (const ib of infeBoxes) {
     buf.set(ib, off)
     off += ib.length
@@ -170,31 +191,91 @@ const buildIinfBox = (infeBoxes: Uint8Array[]): Uint8Array => {
   return buf
 }
 
+interface IlocItem {
+  itemId: number
+  extentOffset: number
+  extentLength: number
+  extents?: Array<{ extentOffset: number; extentLength: number }>
+}
+
 const buildIlocBox = (
-  items: { itemId: number; extentOffset: number; extentLength: number }[]
+  items: IlocItem[],
+  {
+    version = 0,
+    baseOffsetSize = 0,
+    indexSize = 0
+  }: { version?: number; baseOffsetSize?: number; indexSize?: number } = {}
 ): Uint8Array => {
-  const perItemSize = 2 + 2 + 0 + 2 + (4 + 4)
-  const bodySize = 4 + 1 + 1 + 2 + items.length * perItemSize
+  const itemCountSize = version < 2 ? 2 : 4
+  const itemIdSize = version < 2 ? 2 : 4
+  const constructionMethodSize = version === 1 || version === 2 ? 2 : 0
+  const itemSizes = items.map((item) => {
+    const extents = item.extents ?? [
+      {
+        extentOffset: item.extentOffset,
+        extentLength: item.extentLength
+      }
+    ]
+    return (
+      itemIdSize +
+      constructionMethodSize +
+      2 +
+      baseOffsetSize +
+      2 +
+      extents.length * (indexSize + 4 + 4)
+    )
+  })
+  const bodySize =
+    4 + 1 + 1 + itemCountSize + itemSizes.reduce((sum, size) => sum + size, 0)
   const totalSize = 8 + bodySize
   const buf = new Uint8Array(totalSize)
   const dv = new DataView(buf.buffer)
   setU32BE(dv, 0, totalSize)
   buf.set(new TextEncoder().encode('iloc'), 4)
+  buf[8] = version
   buf[12] = 0x44
-  buf[13] = 0x00
-  setU16BE(dv, 14, items.length)
-  let p = 16
-  for (const it of items) {
-    setU16BE(dv, p, it.itemId)
+  buf[13] = (baseOffsetSize << 4) | indexSize
+  let p = 14
+  if (version < 2) {
+    setU16BE(dv, p, items.length)
     p += 2
+  } else {
+    setU32BE(dv, p, items.length)
+    p += 4
+  }
+  for (const it of items) {
+    if (version < 2) {
+      setU16BE(dv, p, it.itemId)
+      p += 2
+    } else {
+      setU32BE(dv, p, it.itemId)
+      p += 4
+    }
+    if (version === 1 || version === 2) {
+      setU16BE(dv, p, 0)
+      p += 2
+    }
     setU16BE(dv, p, 0)
     p += 2
-    setU16BE(dv, p, 1)
+    if (baseOffsetSize > 0) {
+      setU32BE(dv, p, 0)
+      p += baseOffsetSize
+    }
+    const extents = it.extents ?? [
+      {
+        extentOffset: it.extentOffset,
+        extentLength: it.extentLength
+      }
+    ]
+    setU16BE(dv, p, extents.length)
     p += 2
-    setU32BE(dv, p, it.extentOffset)
-    p += 4
-    setU32BE(dv, p, it.extentLength)
-    p += 4
+    for (const extent of extents) {
+      p += indexSize
+      setU32BE(dv, p, extent.extentOffset)
+      p += 4
+      setU32BE(dv, p, extent.extentLength)
+      p += 4
+    }
   }
   return buf
 }
@@ -231,7 +312,13 @@ interface BuildAvifOpts {
   ftypBrand?: string
   omitMeta?: boolean
   omitIloc?: boolean
+  iinfVersion?: number
   infeVersion?: number
+  ilocVersion?: number
+  ilocBaseOffsetSize?: number
+  ilocIndexSize?: number
+  ilocExtents?: Array<{ extentOffset: number; extentLength: number }>
+  rawExifData?: Uint8Array
 }
 
 const buildAvifFile = (opts: BuildAvifOpts = {}): ArrayBuffer => {
@@ -242,7 +329,13 @@ const buildAvifFile = (opts: BuildAvifOpts = {}): ArrayBuffer => {
     ftypBrand = 'avif',
     omitMeta = false,
     omitIloc = false,
-    infeVersion = 2
+    iinfVersion = 0,
+    infeVersion = 2,
+    ilocVersion = 0,
+    ilocBaseOffsetSize = 0,
+    ilocIndexSize = 0,
+    ilocExtents,
+    rawExifData
   } = opts
 
   const ftyp = buildFtypBox(ftypBrand)
@@ -250,19 +343,43 @@ const buildAvifFile = (opts: BuildAvifOpts = {}): ArrayBuffer => {
     return ftyp.slice().buffer as ArrayBuffer
   }
 
-  const exifData = buildExifBlob(exifEntries, endian)
+  const exifData = rawExifData ?? buildExifBlob(exifEntries, endian)
   const infe = buildInfeBox(1, itemType, infeVersion)
-  const iinf = buildIinfBox([infe])
+  const iinf = buildIinfBox([infe], iinfVersion)
 
-  const realIloc = buildIlocBox([
-    { itemId: 1, extentOffset: 0, extentLength: exifData.length }
-  ])
+  const realIloc = buildIlocBox(
+    [
+      {
+        itemId: 1,
+        extentOffset: 0,
+        extentLength: exifData.length,
+        extents: ilocExtents
+      }
+    ],
+    {
+      version: ilocVersion,
+      baseOffsetSize: ilocBaseOffsetSize,
+      indexSize: ilocIndexSize
+    }
+  )
   const metaSize = 8 + 4 + iinf.length + (omitIloc ? 0 : realIloc.length)
   const exifOffset = ftyp.length + metaSize
 
-  const finalIloc = buildIlocBox([
-    { itemId: 1, extentOffset: exifOffset, extentLength: exifData.length }
-  ])
+  const finalIloc = buildIlocBox(
+    [
+      {
+        itemId: 1,
+        extentOffset: exifOffset,
+        extentLength: exifData.length,
+        extents: ilocExtents
+      }
+    ],
+    {
+      version: ilocVersion,
+      baseOffsetSize: ilocBaseOffsetSize,
+      indexSize: ilocIndexSize
+    }
+  )
   const finalInner = omitIloc ? [iinf] : [iinf, finalIloc]
   const meta = buildMetaBox(finalInner)
 
@@ -319,6 +436,52 @@ describe('getFromAvifFile', () => {
     expect(result.workflow).toBe(JSON.stringify(JSON.parse(workflow)))
   })
 
+  it('extracts EXIF metadata from versioned item info and location boxes', async () => {
+    const workflow = '{"versioned":true}'
+    const file = fileFromBuffer(
+      buildAvifFile({
+        exifEntries: [`workflow:${workflow}`],
+        iinfVersion: 1,
+        infeVersion: 3,
+        ilocVersion: 2,
+        ilocBaseOffsetSize: 4,
+        ilocIndexSize: 4
+      })
+    )
+
+    const result = await getFromAvifFile(file)
+
+    expect(result.workflow).toBe(JSON.stringify(JSON.parse(workflow)))
+  })
+
+  it('returns {} when the Exif item has no extents', async () => {
+    const file = fileFromBuffer(
+      buildAvifFile({
+        exifEntries: ['workflow:{}'],
+        ilocExtents: []
+      })
+    )
+
+    const result = await getFromAvifFile(file)
+
+    expect(result).toEqual({})
+  })
+
+  it('returns {} when the Exif payload has no TIFF header', async () => {
+    const file = fileFromBuffer(
+      buildAvifFile({
+        rawExifData: new TextEncoder().encode('not tiff data')
+      })
+    )
+
+    const result = await getFromAvifFile(file)
+
+    expect(result).toEqual({})
+    expect(console.log).toHaveBeenCalledWith(
+      'Warning: TIFF header not found in EXIF data.'
+    )
+  })
+
   it('returns {} when AVIF major brand is not "avif"', async () => {
     const file = fileFromBuffer(
       buildAvifFile({ exifEntries: ['workflow:{}'], ftypBrand: 'heic' })

src/scripts/metadata/ebml.test.ts

@@ -7,7 +7,8 @@ import {
   EXPECTED_PROMPT_NAN_COERCED,
   EXPECTED_WORKFLOW,
   mockFileReaderAbort,
-  mockFileReaderError
+  mockFileReaderError,
+  mockFileReaderResult
 } from './__fixtures__/helpers'
 import { getFromWebmFile } from './ebml'
 
@@ -16,6 +17,56 @@ const nanFixturePath = path.resolve(
   __dirname,
   '__fixtures__/with_nan_metadata.webm'
 )
+const WEBM_SIGNATURE = new Uint8Array([0x1a, 0x45, 0xdf, 0xa3])
+const SIMPLE_TAG = new Uint8Array([0x67, 0xc8])
+const TAG_NAME = new Uint8Array([0x45, 0xa3])
+const TAG_VALUE = new Uint8Array([0x44, 0x87])
+const encoder = new TextEncoder()
+
+function concatBytes(...chunks: Uint8Array[]) {
+  const totalLength = chunks.reduce((sum, chunk) => sum + chunk.length, 0)
+  const result = new Uint8Array(totalLength)
+  let offset = 0
+
+  for (const chunk of chunks) {
+    result.set(chunk, offset)
+    offset += chunk.length
+  }
+
+  return result
+}
+
+function bytes(...values: number[]) {
+  return new Uint8Array(values)
+}
+
+function vint(value: number) {
+  return bytes(0x80 | value)
+}
+
+function element(id: Uint8Array, value: string) {
+  const encoded = encoder.encode(value)
+  return concatBytes(id, vint(encoded.length), encoded)
+}
+
+function simpleTag(name: string, value: string, useTwoByteSize = false) {
+  const payload = concatBytes(
+    element(TAG_NAME, name),
+    element(TAG_VALUE, value)
+  )
+  const size = useTwoByteSize
+    ? bytes(0x40, payload.length)
+    : vint(payload.length)
+  return concatBytes(SIMPLE_TAG, size, payload)
+}
+
+async function readWebm(bytes: Uint8Array) {
+  return getFromWebmFile(
+    new File([bytes as Uint8Array<ArrayBuffer>], 'test.webm', {
+      type: 'video/webm'
+    })
+  )
+}
 
 describe('WebM/EBML metadata', () => {
   it('extracts workflow and prompt from EBML SimpleTag elements', async () => {
@@ -46,6 +97,89 @@ describe('WebM/EBML metadata', () => {
     expect(result).toEqual({})
   })
 
+  it('extracts plain string tags and trims null-terminated values', async () => {
+    const result = await readWebm(
+      concatBytes(
+        WEBM_SIGNATURE,
+        simpleTag('\0Comment', ' hello \0ignored', true)
+      )
+    )
+
+    expect(result.comment).toBe('hello')
+  })
+
+  it('ignores prompt tags whose value is not complete JSON', async () => {
+    const result = await readWebm(
+      concatBytes(WEBM_SIGNATURE, simpleTag('PROMPT', '{not-json'))
+    )
+
+    expect(result.prompt).toBeUndefined()
+  })
+
+  it('ignores prompt tags whose value has no JSON object', async () => {
+    const result = await readWebm(
+      concatBytes(WEBM_SIGNATURE, simpleTag('PROMPT', 'not-json'))
+    )
+
+    expect(result.prompt).toBeUndefined()
+  })
+
+  it('parses the first complete JSON object from a prompt tag', async () => {
+    const result = await readWebm(
+      concatBytes(
+        WEBM_SIGNATURE,
+        simpleTag('PROMPT', 'prefix {"outer":{"inner":1}} trailing')
+      )
+    )
+
+    expect(result.prompt).toEqual({ outer: { inner: 1 } })
+  })
+
+  it('ignores tags whose name has no readable text', async () => {
+    const payload = concatBytes(
+      concatBytes(TAG_NAME, vint(2), bytes(0, 1)),
+      element(TAG_VALUE, 'value')
+    )
+
+    const result = await readWebm(
+      concatBytes(WEBM_SIGNATURE, SIMPLE_TAG, vint(payload.length), payload)
+    )
+
+    expect(result).toEqual({})
+  })
+
+  it('ignores tag elements with zero-sized names', async () => {
+    const payload = concatBytes(TAG_NAME, vint(0), element(TAG_VALUE, 'value'))
+
+    const result = await readWebm(
+      concatBytes(WEBM_SIGNATURE, SIMPLE_TAG, vint(payload.length), payload)
+    )
+
+    expect(result).toEqual({})
+  })
+
+  it('ignores malformed SimpleTag encodings', async () => {
+    const nameOnly = element(TAG_NAME, 'comment')
+
+    await expect(
+      readWebm(concatBytes(WEBM_SIGNATURE, SIMPLE_TAG))
+    ).resolves.toEqual({})
+    await expect(
+      readWebm(concatBytes(WEBM_SIGNATURE, SIMPLE_TAG, bytes(0x00)))
+    ).resolves.toEqual({})
+    await expect(
+      readWebm(concatBytes(WEBM_SIGNATURE, SIMPLE_TAG, bytes(0x7f, 0xff)))
+    ).resolves.toEqual({})
+    await expect(
+      readWebm(concatBytes(WEBM_SIGNATURE, SIMPLE_TAG, vint(10), TAG_NAME))
+    ).resolves.toEqual({})
+    await expect(
+      readWebm(
+        concatBytes(WEBM_SIGNATURE, SIMPLE_TAG, vint(nameOnly.length), nameOnly)
+      )
+    ).resolves.toEqual({})
+  })
+
   describe('FileReader failure modes', () => {
     afterEach(() => vi.restoreAllMocks())
 
@@ -60,5 +194,10 @@ describe('WebM/EBML metadata', () => {
       mockFileReaderAbort('readAsArrayBuffer')
       expect(await getFromWebmFile(file)).toEqual({})
     })
+
+    it('resolves empty when the FileReader load has no result', async () => {
+      mockFileReaderResult('readAsArrayBuffer', null)
+      expect(await getFromWebmFile(file)).toEqual({})
+    })
   })
 })

src/scripts/metadata/gltf.test.ts

@@ -1,3 +1,4 @@
+import { fromAny } from '@total-typescript/shoehorn'
 import { afterEach, describe, expect, it, vi } from 'vitest'
 
 import { ASCII, GltfSizeBytes } from '@/types/metadataTypes'
@@ -5,7 +6,8 @@ import { ASCII, GltfSizeBytes } from '@/types/metadataTypes'
 import {
   EXPECTED_PROMPT_NAN_COERCED,
   mockFileReaderAbort,
-  mockFileReaderError
+  mockFileReaderError,
+  mockFileReaderResult
 } from './__fixtures__/helpers'
 import { getGltfBinaryMetadata } from './gltf'
 
@@ -16,11 +18,15 @@ describe('GLTF binary metadata parser', () => {
     return { header, headerView }
   }
 
-  const createJSONChunk = (jsonData: ArrayBuffer) => {
+  const createJSONChunk = (
+    jsonData: ArrayBuffer,
+    chunkType = ASCII.JSON,
+    chunkLength = jsonData.byteLength
+  ) => {
     const chunkHeader = new ArrayBuffer(GltfSizeBytes.CHUNK_HEADER)
     const chunkView = new DataView(chunkHeader)
-    chunkView.setUint32(0, jsonData.byteLength, true)
-    chunkView.setUint32(4, ASCII.JSON, true)
+    chunkView.setUint32(0, chunkLength, true)
+    chunkView.setUint32(4, chunkType, true)
     return chunkHeader
   }
 
@@ -52,13 +58,27 @@ describe('GLTF binary metadata parser', () => {
   // Builds a GLB whose JSON chunk is the literal text passed in - used to
   // embed Python generated bare NaN/Infinity tokens that JSON.stringify
   // would otherwise coerce to null.
-  function createMockGltfFileFromText(jsonText: string): File {
+  interface MockGltfFileOptions {
+    chunkLength?: number
+    chunkType?: number
+    magicNumber?: number
+  }
+
+  function createMockGltfFileFromText(
+    jsonText: string,
+    {
+      chunkLength,
+      chunkType = ASCII.JSON,
+      magicNumber = ASCII.GLTF
+    }: MockGltfFileOptions = {}
+  ): File {
     const jsonData = new TextEncoder().encode(jsonText)
     const { header, headerView } = createGLTFFileStructure()
 
     setHeaders(headerView, jsonData.buffer)
+    setTypeHeader(headerView, magicNumber)
 
-    const chunkHeader = createJSONChunk(jsonData.buffer)
+    const chunkHeader = createJSONChunk(jsonData.buffer, chunkType, chunkLength)
 
     const fileContent = new Uint8Array(
       header.byteLength + chunkHeader.byteLength + jsonData.byteLength
@@ -130,7 +150,9 @@ describe('GLTF binary metadata parser', () => {
     expect(metadata).toBeDefined()
     expect(metadata.prompt).toBeDefined()
 
-    const prompt = metadata.prompt as Record<string, any>
+    const prompt: {
+      node1: { class_type: string; inputs: { seed: number } }
+    } = fromAny(metadata.prompt)
     expect(prompt.node1.class_type).toBe('TestNode')
     expect(prompt.node1.inputs.seed).toBe(123456)
   })
@@ -179,6 +201,74 @@ describe('GLTF binary metadata parser', () => {
     expect(metadata).toEqual({})
   })
 
+  it('returns empty when the GLB magic number is invalid', async () => {
+    const mockFile = createMockGltfFileFromText('{}', { magicNumber: 0 })
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
+  it('returns empty when the GLB is missing the first chunk header', async () => {
+    const { header, headerView } = createGLTFFileStructure()
+    setTypeHeader(headerView, ASCII.GLTF)
+    setVersionHeader(headerView, 2)
+    setTotalLengthHeader(headerView, GltfSizeBytes.HEADER)
+    const mockFile = new File([header], 'header-only.glb')
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
+  it('returns empty when the first chunk is not JSON', async () => {
+    const mockFile = createMockGltfFileFromText('{}', { chunkType: 0 })
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
+  it('returns empty when the declared JSON chunk exceeds the buffer', async () => {
+    const mockFile = createMockGltfFileFromText('{}', { chunkLength: 1024 })
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
+  it('returns empty when the JSON chunk cannot be parsed', async () => {
+    const mockFile = createMockGltfFileFromText('{not json')
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
+  it('returns empty when asset extras are missing', async () => {
+    const mockFile = createMockGltfFile({ asset: { version: '2.0' } })
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
+  it('skips string metadata values that are not valid JSON', async () => {
+    const mockFile = createMockGltfFile({
+      asset: {
+        version: '2.0',
+        extras: {
+          prompt: '{not json',
+          workflow: '{not json'
+        }
+      }
+    })
+
+    const metadata = await getGltfBinaryMetadata(mockFile)
+
+    expect(metadata).toEqual({})
+  })
+
   describe('FileReader failure modes', () => {
     afterEach(() => vi.restoreAllMocks())
 
@@ -193,5 +283,15 @@ describe('GLTF binary metadata parser', () => {
       mockFileReaderAbort('readAsArrayBuffer')
       expect(await getGltfBinaryMetadata(file)).toEqual({})
     })
+
+    it('resolves empty when the FileReader load result is missing', async () => {
+      mockFileReaderResult('readAsArrayBuffer', null)
+      expect(await getGltfBinaryMetadata(file)).toEqual({})
+    })
+
+    it('resolves empty when the FileReader result is not a buffer', async () => {
+      mockFileReaderResult('readAsArrayBuffer', 'not a buffer')
+      expect(await getGltfBinaryMetadata(file)).toEqual({})
+    })
   })
 })

src/scripts/metadata/isobmff.test.ts

@@ -7,7 +7,8 @@ import {
   EXPECTED_PROMPT_NAN_COERCED,
   EXPECTED_WORKFLOW,
   mockFileReaderAbort,
-  mockFileReaderError
+  mockFileReaderError,
+  mockFileReaderResult
 } from './__fixtures__/helpers'
 import { getFromIsobmffFile } from './isobmff'
 
@@ -16,6 +17,82 @@ const nanFixturePath = path.resolve(
   __dirname,
   '__fixtures__/with_nan_metadata.mp4'
 )
+const encoder = new TextEncoder()
+
+function uint32(value: number) {
+  return new Uint8Array([
+    (value >>> 24) & 0xff,
+    (value >>> 16) & 0xff,
+    (value >>> 8) & 0xff,
+    value & 0xff
+  ])
+}
+
+function concatBytes(...chunks: Uint8Array[]) {
+  const totalLength = chunks.reduce((sum, chunk) => sum + chunk.length, 0)
+  const result = new Uint8Array(totalLength)
+  let offset = 0
+
+  for (const chunk of chunks) {
+    result.set(chunk, offset)
+    offset += chunk.length
+  }
+
+  return result
+}
+
+function box(type: string, payload = new Uint8Array(), size?: number) {
+  return concatBytes(
+    uint32(size ?? 8 + payload.length),
+    encoder.encode(type),
+    payload
+  )
+}
+
+function keyEntry(name: string) {
+  const encoded = encoder.encode(name)
+  return concatBytes(
+    uint32(8 + encoded.length),
+    encoder.encode('mdta'),
+    encoded
+  )
+}
+
+function keysBox(names: string[]) {
+  return box(
+    'keys',
+    concatBytes(uint32(0), uint32(names.length), ...names.map(keyEntry))
+  )
+}
+
+function dataBox(value: string | Uint8Array) {
+  const payload = typeof value === 'string' ? encoder.encode(value) : value
+  return box('data', concatBytes(uint32(0), uint32(0), payload))
+}
+
+function ilstItem(index: number, payload: Uint8Array) {
+  return concatBytes(uint32(8 + payload.length), uint32(index), payload)
+}
+
+function ilstBox(...items: Uint8Array[]) {
+  return box('ilst', concatBytes(...items))
+}
+
+function metaBox(...children: Uint8Array[]) {
+  return box('meta', concatBytes(uint32(0), ...children))
+}
+
+function udtaWithMeta(...children: Uint8Array[]) {
+  return box('udta', metaBox(...children))
+}
+
+async function readMp4(bytes: Uint8Array) {
+  return getFromIsobmffFile(
+    new File([bytes as Uint8Array<ArrayBuffer>], 'test.mp4', {
+      type: 'video/mp4'
+    })
+  )
+}
 
 describe('ISOBMFF (MP4) metadata', () => {
   it('extracts workflow and prompt from QuickTime keys/ilst boxes', async () => {
@@ -48,6 +125,102 @@ describe('ISOBMFF (MP4) metadata', () => {
     expect(result).toEqual({})
   })
 
+  it('extracts metadata from udta nested inside moov', async () => {
+    const bytes = box(
+      'moov',
+      udtaWithMeta(
+        keysBox(['WORKFLOW']),
+        ilstBox(ilstItem(1, dataBox('xxxx{"nodes":[]}')))
+      )
+    )
+
+    const result = await readMp4(bytes)
+
+    expect(result.workflow).toEqual({ nodes: [] })
+  })
+
+  it('returns empty when a top-level box declares an impossible size', async () => {
+    const result = await readMp4(box('free', new Uint8Array([1, 2]), 100))
+
+    expect(result).toEqual({})
+  })
+
+  it('returns empty when the keys box cannot provide entries', async () => {
+    const tooShortKeys = box('keys', uint32(0))
+    const missingKeyEntry = box(
+      'keys',
+      concatBytes(uint32(0), uint32(1), uint32(8))
+    )
+    const malformedKey = box(
+      'keys',
+      concatBytes(uint32(0), uint32(1), uint32(7), encoder.encode('bad!'))
+    )
+    const oversizedKey = box(
+      'keys',
+      concatBytes(uint32(0), uint32(1), uint32(100), encoder.encode('bad!'))
+    )
+
+    await expect(readMp4(udtaWithMeta(tooShortKeys))).resolves.toEqual({})
+    await expect(readMp4(udtaWithMeta(missingKeyEntry))).resolves.toEqual({})
+    await expect(readMp4(udtaWithMeta(malformedKey))).resolves.toEqual({})
+    await expect(readMp4(udtaWithMeta(oversizedKey))).resolves.toEqual({})
+  })
+
+  it('ignores item entries whose key is unknown or unsupported', async () => {
+    const unknownIndex = udtaWithMeta(
+      keysBox(['PROMPT']),
+      ilstBox(ilstItem(2, dataBox('{"1":{}}')))
+    )
+    const unsupportedKey = udtaWithMeta(
+      keysBox(['DESCRIPTION']),
+      ilstBox(ilstItem(1, dataBox('{"ignored":true}')))
+    )
+
+    await expect(readMp4(unknownIndex)).resolves.toEqual({})
+    await expect(readMp4(unsupportedKey)).resolves.toEqual({})
+  })
+
+  it('ignores metadata items without readable JSON data', async () => {
+    const shortDataBox = box('data')
+    const noJson = dataBox('not-json')
+    const invalidJson = dataBox('prefix {not-json')
+    const noDataBox = box('free', new Uint8Array([1]))
+    const invalidItems = ilstBox(
+      concatBytes(uint32(8), uint32(1)),
+      concatBytes(uint32(100), uint32(1), invalidJson)
+    )
+
+    await expect(
+      readMp4(
+        udtaWithMeta(keysBox(['PROMPT']), ilstBox(ilstItem(1, shortDataBox)))
+      )
+    ).resolves.toEqual({})
+    await expect(
+      readMp4(udtaWithMeta(keysBox(['PROMPT']), ilstBox(ilstItem(1, noJson))))
+    ).resolves.toEqual({})
+    await expect(
+      readMp4(
+        udtaWithMeta(keysBox(['PROMPT']), ilstBox(ilstItem(1, invalidJson)))
+      )
+    ).resolves.toEqual({})
+    await expect(
+      readMp4(
+        udtaWithMeta(keysBox(['PROMPT']), ilstBox(ilstItem(1, noDataBox)))
+      )
+    ).resolves.toEqual({})
+    await expect(
+      readMp4(udtaWithMeta(keysBox(['PROMPT']), invalidItems))
+    ).resolves.toEqual({})
+  })
+
+  it('returns empty when required metadata boxes are absent', async () => {
+    await expect(readMp4(box('udta', box('free')))).resolves.toEqual({})
+    await expect(readMp4(udtaWithMeta(ilstBox()))).resolves.toEqual({})
+    await expect(readMp4(udtaWithMeta(keysBox(['PROMPT'])))).resolves.toEqual(
+      {}
+    )
+  })
+
   describe('FileReader failure modes', () => {
     afterEach(() => vi.restoreAllMocks())
 
@@ -63,5 +236,10 @@ describe('ISOBMFF (MP4) metadata', () => {
       mockFileReaderAbort('readAsArrayBuffer')
       expect(await getFromIsobmffFile(file)).toEqual({})
     })
+
+    it('resolves empty when the FileReader load has no result', async () => {
+      mockFileReaderResult('readAsArrayBuffer', null)
+      expect(await getFromIsobmffFile(file)).toEqual({})
+    })
   })
 })

src/scripts/metadata/parser.test.ts

@@ -0,0 +1,127 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { getFromWebmFile } from '@/scripts/metadata/ebml'
+import { getGltfBinaryMetadata } from '@/scripts/metadata/gltf'
+import { getFromIsobmffFile } from '@/scripts/metadata/isobmff'
+import { getDataFromJSON } from '@/scripts/metadata/json'
+import { getMp3Metadata } from '@/scripts/metadata/mp3'
+import { getOggMetadata } from '@/scripts/metadata/ogg'
+import { getWorkflowDataFromFile } from '@/scripts/metadata/parser'
+import { getSvgMetadata } from '@/scripts/metadata/svg'
+import {
+  getAvifMetadata,
+  getFlacMetadata,
+  getLatentMetadata,
+  getPngMetadata,
+  getWebpMetadata
+} from '@/scripts/pnginfo'
+
+vi.mock('@/scripts/metadata/ebml', () => ({ getFromWebmFile: vi.fn() }))
+vi.mock('@/scripts/metadata/gltf', () => ({ getGltfBinaryMetadata: vi.fn() }))
+vi.mock('@/scripts/metadata/isobmff', () => ({ getFromIsobmffFile: vi.fn() }))
+vi.mock('@/scripts/metadata/json', () => ({ getDataFromJSON: vi.fn() }))
+vi.mock('@/scripts/metadata/mp3', () => ({ getMp3Metadata: vi.fn() }))
+vi.mock('@/scripts/metadata/ogg', () => ({ getOggMetadata: vi.fn() }))
+vi.mock('@/scripts/metadata/svg', () => ({ getSvgMetadata: vi.fn() }))
+vi.mock('@/scripts/pnginfo', () => ({
+  getAvifMetadata: vi.fn(),
+  getFlacMetadata: vi.fn(),
+  getLatentMetadata: vi.fn(),
+  getPngMetadata: vi.fn(),
+  getWebpMetadata: vi.fn()
+}))
+
+function file(type: string, name = 'file') {
+  return new File(['data'], name, { type })
+}
+
+beforeEach(() => {
+  vi.clearAllMocks()
+})
+
+describe('getWorkflowDataFromFile', () => {
+  it('routes png/avif/mp3/ogg/webm to their parsers and returns the result', async () => {
+    vi.mocked(getPngMetadata).mockResolvedValue({ a: 1 } as never)
+    expect(await getWorkflowDataFromFile(file('image/png'))).toEqual({ a: 1 })
+    expect(getPngMetadata).toHaveBeenCalled()
+
+    await getWorkflowDataFromFile(file('image/avif'))
+    expect(getAvifMetadata).toHaveBeenCalled()
+
+    await getWorkflowDataFromFile(file('audio/mpeg'))
+    expect(getMp3Metadata).toHaveBeenCalled()
+
+    await getWorkflowDataFromFile(file('audio/ogg'))
+    expect(getOggMetadata).toHaveBeenCalled()
+
+    await getWorkflowDataFromFile(file('video/webm'))
+    expect(getFromWebmFile).toHaveBeenCalled()
+  })
+
+  it('extracts workflow/prompt from webp, preferring lowercase keys', async () => {
+    vi.mocked(getWebpMetadata).mockResolvedValue({
+      workflow: 'wf',
+      prompt: 'pr'
+    } as never)
+    expect(await getWorkflowDataFromFile(file('image/webp'))).toEqual({
+      workflow: 'wf',
+      prompt: 'pr'
+    })
+  })
+
+  it('falls back to capitalized webp keys when lowercase are absent', async () => {
+    vi.mocked(getWebpMetadata).mockResolvedValue({
+      Workflow: 'WF',
+      Prompt: 'PR'
+    } as never)
+    expect(await getWorkflowDataFromFile(file('image/webp'))).toEqual({
+      workflow: 'WF',
+      prompt: 'PR'
+    })
+  })
+
+  it('handles both flac mime types and extracts workflow/prompt', async () => {
+    vi.mocked(getFlacMetadata).mockResolvedValue({ workflow: 'w' } as never)
+    expect(await getWorkflowDataFromFile(file('audio/flac'))).toEqual({
+      workflow: 'w',
+      prompt: undefined
+    })
+    expect(await getWorkflowDataFromFile(file('audio/x-flac'))).toEqual({
+      workflow: 'w',
+      prompt: undefined
+    })
+  })
+
+  it('routes isobmff by mime type and by file extension', async () => {
+    await getWorkflowDataFromFile(file('video/mp4'))
+    await getWorkflowDataFromFile(file('', 'clip.mov'))
+    await getWorkflowDataFromFile(file('', 'clip.m4v'))
+    expect(getFromIsobmffFile).toHaveBeenCalledTimes(3)
+  })
+
+  it('routes svg and gltf by mime type or extension', async () => {
+    await getWorkflowDataFromFile(file('image/svg+xml'))
+    await getWorkflowDataFromFile(file('', 'icon.svg'))
+    expect(getSvgMetadata).toHaveBeenCalledTimes(2)
+
+    await getWorkflowDataFromFile(file('model/gltf-binary'))
+    await getWorkflowDataFromFile(file('', 'model.glb'))
+    expect(getGltfBinaryMetadata).toHaveBeenCalledTimes(2)
+  })
+
+  it('routes latent/safetensors and json by extension or mime type', async () => {
+    await getWorkflowDataFromFile(file('', 'x.latent'))
+    await getWorkflowDataFromFile(file('', 'x.safetensors'))
+    expect(getLatentMetadata).toHaveBeenCalledTimes(2)
+
+    await getWorkflowDataFromFile(file('application/json'))
+    await getWorkflowDataFromFile(file('', 'x.json'))
+    expect(getDataFromJSON).toHaveBeenCalledTimes(2)
+  })
+
+  it('returns undefined for an unrecognized file', async () => {
+    expect(
+      await getWorkflowDataFromFile(file('application/zip', 'a.zip'))
+    ).toBe(undefined)
+  })
+})

src/scripts/metadata/png.test.ts

@@ -2,7 +2,8 @@ import { afterEach, describe, expect, it, vi } from 'vitest'
 
 import {
   mockFileReaderAbort,
-  mockFileReaderError
+  mockFileReaderError,
+  mockFileReaderResult
 } from './__fixtures__/helpers'
 import { getFromPngBuffer, getFromPngFile } from './png'
 
@@ -191,6 +192,27 @@ describe('getFromPngBuffer', () => {
     const result = await getFromPngBuffer(buffer)
     expect(result['workflow']).toBe(workflow)
   })
+
+  it('logs error and skips compressed iTXt with invalid deflate data', async () => {
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+    const buffer = createPngWithChunk(
+      'iTXt',
+      'workflow',
+      new Uint8Array([1, 2, 3]),
+      {
+        compressionFlag: 1,
+        compressionMethod: 0
+      }
+    )
+
+    const result = await getFromPngBuffer(buffer)
+
+    expect(result['workflow']).toBeUndefined()
+    expect(console.error).toHaveBeenCalledWith(
+      expect.stringContaining('Failed to decompress iTXt chunk "workflow"'),
+      expect.anything()
+    )
+  })
 })
 
 describe('getFromPngFile', () => {
@@ -228,5 +250,12 @@ describe('getFromPngFile', () => {
       mockFileReaderAbort('readAsArrayBuffer')
       await expect(getFromPngFile(file)).rejects.toThrow('FileReader aborted')
     })
+
+    it('rejects when the FileReader load has no ArrayBuffer result', async () => {
+      mockFileReaderResult('readAsArrayBuffer', null)
+      await expect(getFromPngFile(file)).rejects.toThrow(
+        'Failed to read file as ArrayBuffer'
+      )
+    })
   })
 })

src/scripts/pnginfo.test.ts

@@ -1,13 +1,19 @@
 import fs from 'fs'
 import path from 'path'
 import { afterEach, describe, expect, it, vi } from 'vitest'
+import { fromPartial } from '@total-typescript/shoehorn'
 
+import type { LGraph, LGraphNode } from '@/lib/litegraph/src/litegraph'
+import { LiteGraph } from '@/lib/litegraph/src/litegraph'
+import type { IBaseWidget } from '@/lib/litegraph/src/types/widgets'
+import { api } from '@/scripts/api'
 import { getFromAvifFile } from './metadata/avif'
 import { getFromFlacFile } from './metadata/flac'
 import { getFromPngFile } from './metadata/png'
 import {
   getAvifMetadata,
   getFlacMetadata,
+  importA1111,
   getLatentMetadata,
   getPngMetadata,
   getWebpMetadata
@@ -56,6 +62,20 @@ function encodeAsciiIfd(entries: AsciiIfdEntry[]): Uint8Array {
   return buf
 }
 
+function encodeNonAsciiIfdEntry(tag: number): Uint8Array {
+  const buf = new Uint8Array(22)
+  const dv = new DataView(buf.buffer)
+  buf.set([0x49, 0x49], 0)
+  dv.setUint16(2, 0x002a, true)
+  dv.setUint32(4, 8, true)
+  dv.setUint16(8, 1, true)
+  dv.setUint16(10, tag, true)
+  dv.setUint16(12, 3, true)
+  dv.setUint32(14, 1, true)
+  dv.setUint32(18, 123, true)
+  return buf
+}
+
 type WebpChunk = { type: string; payload: Uint8Array }
 
 function wrapInWebp(chunks: WebpChunk[]): File {
@@ -157,6 +177,16 @@ describe('getWebpMetadata', () => {
 
     expect(metadata).toEqual({ workflow: '{"a":1}' })
   })
+
+  it('ignores EXIF entries that are not ASCII strings', async () => {
+    const file = wrapInWebp([
+      { type: 'EXIF', payload: encodeNonAsciiIfdEntry(270) }
+    ])
+
+    const metadata = await getWebpMetadata(file)
+
+    expect(metadata).toEqual({})
+  })
 })
 
 describe('getLatentMetadata', () => {
@@ -234,3 +264,313 @@ describe('format-specific metadata wrappers', () => {
     expect(result).toEqual({ workflow: '{"avif":1}' })
   })
 })
+
+describe('importA1111', () => {
+  function widget(
+    name: string,
+    options: string[] = []
+  ): IBaseWidget & { value?: string | number } {
+    return fromPartial<IBaseWidget & { value?: string | number }>({
+      name,
+      options: { values: options },
+      value: undefined
+    })
+  }
+
+  function createNode(type: string): LGraphNode {
+    const widgetsByType: Record<string, IBaseWidget[]> = {
+      CheckpointLoaderSimple: [widget('ckpt_name', ['sd15.safetensors'])],
+      CLIPSetLastLayer: [widget('stop_at_clip_layer')],
+      CLIPTextEncode: [widget('text')],
+      EmptyLatentImage: [widget('width'), widget('height')],
+      ImageScale: [widget('width'), widget('height')],
+      ImageUpscaleWithModel: [],
+      KSampler: [
+        widget('cfg'),
+        widget('sampler_name', ['euler_a', 'dpmpp_2m']),
+        widget('scheduler', ['normal', 'karras']),
+        widget('seed'),
+        widget('steps'),
+        widget('denoise')
+      ],
+      LatentUpscale: [
+        widget('upscale_method', ['nearest-exact']),
+        widget('width'),
+        widget('height')
+      ],
+      LoraLoader: [
+        widget('lora_name', ['foo.safetensors']),
+        widget('strength_model'),
+        widget('strength_clip')
+      ],
+      UpscaleModelLoader: [widget('model_name', ['ESRGAN'])],
+      VAEEncodeTiled: [],
+      VAEDecodeTiled: [],
+      SaveImage: [],
+      VAEDecode: []
+    }
+    return {
+      type,
+      widgets: widgetsByType[type] ?? [],
+      connect: vi.fn()
+    } as unknown as LGraphNode
+  }
+
+  function createGraph(): LGraph {
+    return fromPartial<LGraph>({
+      add: vi.fn(),
+      arrange: vi.fn(),
+      clear: vi.fn()
+    })
+  }
+
+  function findWidget(node: LGraphNode, name: string) {
+    return node.widgets?.find((widget) => widget.name === name)
+  }
+
+  it('ignores text without parsed generation settings', async () => {
+    const graph = createGraph()
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+
+    await importA1111(graph, 'positive prompt only')
+    await importA1111(graph, 'positive prompt\nSteps:\n')
+
+    expect(graph.clear).not.toHaveBeenCalled()
+  })
+
+  it('ignores text without a negative prompt section', async () => {
+    const graph = createGraph()
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+
+    await importA1111(
+      graph,
+      ['positive prompt only', 'Steps: 20, Sampler: Euler a'].join('\n')
+    )
+
+    expect(graph.clear).not.toHaveBeenCalled()
+  })
+
+  it('stops when a required base node cannot be created', async () => {
+    const graph = createGraph()
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) =>
+      type === 'KSampler' ? null : createNode(type)
+    )
+
+    await importA1111(
+      graph,
+      [
+        'prompt',
+        'Negative prompt: blurry',
+        'Steps: 20, Sampler: Euler a, Size: 512x512'
+      ].join('\n')
+    )
+
+    expect(graph.clear).not.toHaveBeenCalled()
+    expect(console.error).toHaveBeenCalledWith(
+      'Failed to create required nodes for A1111 import'
+    )
+  })
+
+  it('builds a basic graph from A1111 parameters', async () => {
+    const graph = createGraph()
+    const nodes: LGraphNode[] = []
+    vi.spyOn(console, 'warn').mockImplementation(() => {})
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue(['easynegative'])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) => {
+      const node = createNode(type)
+      nodes.push(node)
+      return node
+    })
+
+    await importA1111(
+      graph,
+      [
+        '<lora:foo:0.7> portrait easynegative',
+        'Negative prompt: blurry <lora:bad:not-number>',
+        'Steps: 20, Sampler: Euler a, CFG scale: 7, Seed: 42, Size: 512x512, Model: sd15, Clip skip: 2, Model hash: ignored'
+      ].join('\n')
+    )
+
+    const checkpoint = nodes.find(
+      (node) => node.type === 'CheckpointLoaderSimple'
+    )
+    const clipSkip = nodes.find((node) => node.type === 'CLIPSetLastLayer')
+    const sampler = nodes.find((node) => node.type === 'KSampler')
+    const image = nodes.find((node) => node.type === 'EmptyLatentImage')
+    const lora = nodes.find((node) => node.type === 'LoraLoader')
+    const textNodes = nodes.filter((node) => node.type === 'CLIPTextEncode')
+
+    expect(graph.clear).toHaveBeenCalledOnce()
+    expect(graph.arrange).toHaveBeenCalledOnce()
+    expect(findWidget(checkpoint!, 'ckpt_name')?.value).toBe('sd15.safetensors')
+    expect(findWidget(clipSkip!, 'stop_at_clip_layer')?.value).toBe(-2)
+    expect(findWidget(sampler!, 'cfg')?.value).toBe(7)
+    expect(findWidget(sampler!, 'sampler_name')?.value).toBe('euler_a')
+    expect(findWidget(sampler!, 'scheduler')?.value).toBe('normal')
+    expect(findWidget(sampler!, 'seed')?.value).toBe(42)
+    expect(findWidget(sampler!, 'steps')?.value).toBe(20)
+    expect(findWidget(image!, 'width')?.value).toBe(512)
+    expect(findWidget(image!, 'height')?.value).toBe(512)
+    expect(findWidget(lora!, 'lora_name')?.value).toBe('foo.safetensors')
+    expect(findWidget(lora!, 'strength_model')?.value).toBe(0.7)
+    expect(findWidget(lora!, 'strength_clip')?.value).toBe(0.7)
+    expect(findWidget(textNodes[0], 'text')?.value).toBe(
+      ' portrait embedding:easynegative'
+    )
+    expect(findWidget(textNodes[1], 'text')?.value).toBe('blurry ')
+  })
+
+  it('keeps unknown option-prefix values and logs the mismatch', async () => {
+    const graph = createGraph()
+    const nodes: LGraphNode[] = []
+    vi.spyOn(console, 'warn').mockImplementation(() => {})
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) => {
+      const node = createNode(type)
+      nodes.push(node)
+      return node
+    })
+
+    await importA1111(
+      graph,
+      [
+        'portrait',
+        'Negative prompt: blurry',
+        'Steps: 20, Sampler: Unknown Sampler, CFG scale: 7, Seed: 42, Size: 512x512, Model: unknown-model'
+      ].join('\n')
+    )
+
+    const checkpoint = nodes.find(
+      (node) => node.type === 'CheckpointLoaderSimple'
+    )
+    expect(findWidget(checkpoint!, 'ckpt_name')?.value).toBe('unknown-model')
+    expect(console.warn).toHaveBeenCalledWith(
+      "Unknown value 'unknown-model' for widget 'ckpt_name'",
+      checkpoint
+    )
+  })
+
+  it('skips missing LoraLoader nodes while keeping prompt text cleaned', async () => {
+    const graph = createGraph()
+    const nodes: LGraphNode[] = []
+    vi.spyOn(console, 'warn').mockImplementation(() => {})
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) => {
+      if (type === 'LoraLoader') return null
+      const node = createNode(type)
+      nodes.push(node)
+      return node
+    })
+
+    await importA1111(
+      graph,
+      [
+        '<lora:missing:0.5> portrait',
+        'Negative prompt: blurry',
+        'Steps: 20, Sampler: Euler a, Size: 512x512'
+      ].join('\n')
+    )
+
+    const textNodes = nodes.filter((node) => node.type === 'CLIPTextEncode')
+    expect(findWidget(textNodes[0], 'text')?.value).toBe(' portrait')
+  })
+
+  it('returns from latent hires setup when LatentUpscale cannot be created', async () => {
+    const graph = createGraph()
+    const nodes: LGraphNode[] = []
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) => {
+      if (type === 'LatentUpscale') return null
+      const node = createNode(type)
+      nodes.push(node)
+      return node
+    })
+
+    await importA1111(
+      graph,
+      [
+        'portrait',
+        'Negative prompt: blurry',
+        'Steps: 8, Sampler: Euler a, Size: 512x512, Hires upscale: 2, Hires upscaler: Latent'
+      ].join('\n')
+    )
+
+    expect(nodes.some((node) => node.type === 'KSampler')).toBe(true)
+    expect(nodes.some((node) => node.type === 'LatentUpscale')).toBe(false)
+  })
+
+  it('builds a latent hires pass with explicit resize and denoise settings', async () => {
+    const graph = createGraph()
+    const nodes: LGraphNode[] = []
+    vi.spyOn(console, 'warn').mockImplementation(() => {})
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) => {
+      const node = createNode(type)
+      nodes.push(node)
+      return node
+    })
+
+    await importA1111(
+      graph,
+      [
+        'portrait',
+        'Negative prompt: blurry',
+        'Steps: 12, Sampler: DPM++ 2M Karras, CFG scale: 5, Seed: 1, Size: 513x577, Model: sd15, Hires resize: 1025x1089, Hires steps: 4, Hires upscaler: Latent (nearest-exact), Denoising strength: 0.35'
+      ].join('\n')
+    )
+
+    const image = nodes.find((node) => node.type === 'EmptyLatentImage')
+    const latentUpscale = nodes.find((node) => node.type === 'LatentUpscale')
+    const samplers = nodes.filter((node) => node.type === 'KSampler')
+
+    expect(findWidget(image!, 'width')?.value).toBe(576)
+    expect(findWidget(image!, 'height')?.value).toBe(640)
+    expect(findWidget(latentUpscale!, 'upscale_method')?.value).toBe(
+      'nearest-exact'
+    )
+    expect(findWidget(latentUpscale!, 'width')?.value).toBe(1088)
+    expect(findWidget(latentUpscale!, 'height')?.value).toBe(1152)
+    expect(findWidget(samplers[0], 'scheduler')?.value).toBe('karras')
+    expect(findWidget(samplers[0], 'sampler_name')?.value).toBe('dpmpp_2m')
+    expect(findWidget(samplers[1], 'steps')?.value).toBe(4)
+    expect(findWidget(samplers[1], 'cfg')?.value).toBe(5)
+    expect(findWidget(samplers[1], 'scheduler')?.value).toBe('karras')
+    expect(findWidget(samplers[1], 'sampler_name')?.value).toBe('dpmpp_2m')
+    expect(findWidget(samplers[1], 'denoise')?.value).toBe(0.35)
+  })
+
+  it('builds an image upscaler hires pass with fallback steps and denoise', async () => {
+    const graph = createGraph()
+    const nodes: LGraphNode[] = []
+    vi.spyOn(console, 'warn').mockImplementation(() => {})
+    vi.spyOn(api, 'getEmbeddings').mockResolvedValue([])
+    vi.spyOn(LiteGraph, 'createNode').mockImplementation((type) => {
+      const node = createNode(type)
+      nodes.push(node)
+      return node
+    })
+
+    await importA1111(
+      graph,
+      [
+        'portrait',
+        'Negative prompt: blurry',
+        'Steps: 8, Sampler: Euler a, CFG scale: 6, Seed: 2, Size: 512x512, Model: sd15, Hires upscale: 1.5, Hires upscaler: ESRGAN'
+      ].join('\n')
+    )
+
+    const upscaleLoader = nodes.find(
+      (node) => node.type === 'UpscaleModelLoader'
+    )
+    const imageScale = nodes.find((node) => node.type === 'ImageScale')
+    const samplers = nodes.filter((node) => node.type === 'KSampler')
+
+    expect(findWidget(upscaleLoader!, 'model_name')?.value).toBe('ESRGAN')
+    expect(findWidget(imageScale!, 'width')?.value).toBe(768)
+    expect(findWidget(imageScale!, 'height')?.value).toBe(768)
+    expect(findWidget(samplers[1], 'steps')?.value).toBe(8)
+    expect(findWidget(samplers[1], 'denoise')?.value).toBe(1)
+  })
+})

src/scripts/ui.test.ts

@@ -0,0 +1,450 @@
+import { fromAny, fromPartial } from '@total-typescript/shoehorn'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+const { mockSettingStore } = vi.hoisted(() => ({
+  mockSettingStore: {
+    get: vi.fn()
+  }
+}))
+
+vi.mock('@/composables/useRunButtonTelemetry', () => ({
+  useRunButtonTelemetry: () => ({ trackRunButton: vi.fn() })
+}))
+
+vi.mock('@/platform/remote/comfyui/jobs/fetchJobs', () => ({
+  extractWorkflow: vi.fn()
+}))
+
+vi.mock('@/platform/settings/composables/useSettingsDialog', () => ({
+  useSettingsDialog: () => ({ show: vi.fn() })
+}))
+
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: () => mockSettingStore
+}))
+
+vi.mock('@/platform/telemetry', () => ({
+  useTelemetry: () => ({ trackWorkflowExecution: vi.fn() })
+}))
+
+vi.mock('@/services/litegraphService', () => ({
+  useLitegraphService: () => ({ resetView: vi.fn() })
+}))
+
+vi.mock('@/stores/commandStore', () => ({
+  useCommandStore: () => ({ execute: vi.fn() })
+}))
+
+vi.mock('@/stores/workspaceStore', () => ({
+  useWorkspaceStore: () => ({ focusMode: false })
+}))
+
+vi.mock('./api', () => ({
+  api: {
+    addEventListener: vi.fn(),
+    clearItems: vi.fn(),
+    deleteItem: vi.fn(),
+    dispatchCustomEvent: vi.fn(),
+    getHistory: vi.fn(),
+    getJobDetail: vi.fn(),
+    getQueue: vi.fn(),
+    interrupt: vi.fn()
+  }
+}))
+
+vi.mock('./app', () => ({
+  app: {
+    clean: vi.fn(),
+    handleFile: vi.fn(),
+    loadGraphData: vi.fn(),
+    openClipspace: vi.fn(),
+    queuePrompt: vi.fn(),
+    refreshComboInNodes: vi.fn(() => Promise.resolve())
+  },
+  ComfyApp: class ComfyApp {}
+}))
+
+vi.mock('./ui/dialog', () => ({
+  ComfyDialog: class ComfyDialog {}
+}))
+
+vi.mock('./ui/settings', () => ({
+  ComfySettingsDialog: class ComfySettingsDialog {}
+}))
+
+vi.mock('./ui/toggleSwitch', () => ({
+  toggleSwitch: () => document.createElement('div')
+}))
+
+import { extractWorkflow } from '@/platform/remote/comfyui/jobs/fetchJobs'
+
+import { api } from './api'
+import { app } from './app'
+import { $el, ComfyUI } from './ui'
+
+beforeEach(() => {
+  document.body.replaceChildren()
+  localStorage.clear()
+  vi.clearAllMocks()
+  mockSettingStore.get.mockReturnValue(undefined)
+  Object.assign(app, {
+    lastExecutionError: undefined,
+    nodeOutputs: undefined
+  })
+})
+
+async function click(button: HTMLButtonElement) {
+  const handler = button.onclick
+  expect(handler).toBeTypeOf('function')
+  await Promise.resolve(handler?.call(button, fromAny(new MouseEvent('click'))))
+}
+
+function buttonByText(root: ParentNode, text: string): HTMLButtonElement {
+  const button = [...root.querySelectorAll('button')].find(
+    (candidate) => candidate.textContent === text
+  )
+  if (!button) throw new Error(`Missing button: ${text}`)
+  return button
+}
+
+describe('$el', () => {
+  it('creates elements with classes, children, props, and callbacks', () => {
+    const parent = document.createElement('section')
+    const child = document.createElement('span')
+    const callback = vi.fn()
+
+    const element = $el(
+      'label.primary.secondary',
+      {
+        parent,
+        $: callback,
+        dataset: { role: 'name' },
+        for: 'target-input',
+        style: { display: 'block' },
+        title: 'Label'
+      },
+      child
+    )
+
+    expect(element.tagName).toBe('LABEL')
+    expect(element.classList.contains('primary')).toBe(true)
+    expect(element.classList.contains('secondary')).toBe(true)
+    expect(element.dataset.role).toBe('name')
+    expect(element.getAttribute('for')).toBe('target-input')
+    expect(element.style.display).toBe('block')
+    expect(element.title).toBe('Label')
+    expect(element.firstElementChild).toBe(child)
+    expect(parent.firstElementChild).toBe(element)
+    expect(callback).toHaveBeenCalledWith(element)
+  })
+
+  it('accepts string and single-element children shorthands', () => {
+    const textElement = $el('button', 'Run')
+    const child = document.createElement('strong')
+    const wrapper = $el('div', child)
+
+    expect(textElement.textContent).toBe('Run')
+    expect(wrapper.firstElementChild).toBe(child)
+  })
+})
+
+describe('ComfyUI legacy menu', () => {
+  it('loads queue items and runs list actions', async () => {
+    vi.mocked(api.getQueue).mockResolvedValue({
+      Running: [{ id: 'running', priority: 1 }],
+      Pending: [{ id: 'pending', priority: 2 }]
+    } as never)
+    vi.mocked(api.getJobDetail).mockResolvedValue({
+      outputs: { node: { images: ['image.png'] } }
+    } as never)
+    vi.mocked(extractWorkflow).mockResolvedValue({ nodes: [] } as never)
+    const ui = new ComfyUI(app)
+
+    await ui.queue.show()
+    await click(buttonByText(ui.queue.element, 'Load'))
+
+    expect(api.getJobDetail).toHaveBeenCalledWith('running')
+    expect(extractWorkflow).toHaveBeenCalled()
+    expect(app.loadGraphData).toHaveBeenCalledWith({ nodes: [] }, true, false)
+    expect(app.nodeOutputs).toEqual({ node: { images: ['image.png'] } })
+
+    await click(buttonByText(ui.queue.element, 'Cancel'))
+    expect(api.interrupt).toHaveBeenCalledWith('running')
+
+    await click(buttonByText(ui.queue.element, 'Delete'))
+    expect(api.deleteItem).toHaveBeenCalledWith('queue', 'pending')
+
+    await click(buttonByText(ui.queue.element, 'Clear Queue'))
+    expect(api.clearItems).toHaveBeenCalledWith('queue')
+
+    await click(buttonByText(ui.queue.element, 'Refresh'))
+    expect(api.getQueue).toHaveBeenCalled()
+  })
+
+  it('skips loading queue items when job details are unavailable', async () => {
+    vi.mocked(api.getQueue).mockResolvedValue({
+      Running: [{ id: 'running', priority: 1 }],
+      Pending: []
+    } as never)
+    vi.mocked(api.getJobDetail).mockResolvedValue(null as never)
+    const ui = new ComfyUI(app)
+
+    await ui.queue.show()
+    await click(buttonByText(ui.queue.element, 'Load'))
+
+    expect(extractWorkflow).not.toHaveBeenCalled()
+    expect(app.loadGraphData).not.toHaveBeenCalled()
+  })
+
+  it('loads queue item workflows without outputs', async () => {
+    vi.mocked(api.getQueue).mockResolvedValue({
+      Running: [{ id: 'running', priority: 1 }],
+      Pending: []
+    } as never)
+    vi.mocked(api.getJobDetail).mockResolvedValue({ id: 'running' } as never)
+    vi.mocked(extractWorkflow).mockResolvedValue({ nodes: [] } as never)
+    const ui = new ComfyUI(app)
+
+    await ui.queue.show()
+    await click(buttonByText(ui.queue.element, 'Load'))
+
+    expect(app.loadGraphData).toHaveBeenCalledWith({ nodes: [] }, true, false)
+    expect(app.nodeOutputs).toBeUndefined()
+  })
+
+  it('loads history in reverse order', async () => {
+    vi.mocked(api.getHistory).mockResolvedValue([
+      { id: 'old', priority: 1 },
+      { id: 'new', priority: 2 }
+    ] as never)
+    const ui = new ComfyUI(app)
+
+    await ui.history.show()
+
+    expect(ui.history.element.textContent).toContain('2: LoadDelete')
+    expect(ui.history.element.textContent?.indexOf('2:')).toBeLessThan(
+      ui.history.element.textContent?.indexOf('1:') ?? Number.MAX_SAFE_INTEGER
+    )
+  })
+
+  it('updates queue status and auto-queues when enabled', () => {
+    const ui = new ComfyUI(app)
+    ui.autoQueueEnabled = true
+    ui.autoQueueMode = 'instant'
+    ui.lastQueueSize = 1
+    ui.batchCount = 3
+
+    ui.setStatus({ exec_info: { queue_remaining: 0 } })
+
+    expect(app.queuePrompt).toHaveBeenCalledWith(0, 3)
+    expect(ui.queueSize.textContent).toBe('Queue size: 0')
+    expect(ui.lastQueueSize).toBe(3)
+
+    ui.setStatus(null)
+    expect(ui.queueSize.textContent).toBe('Queue size: ERR')
+  })
+
+  it('does not auto-queue while a prior execution error is present', () => {
+    const ui = new ComfyUI(app)
+    ui.autoQueueEnabled = true
+    ui.autoQueueMode = 'instant'
+    ui.lastQueueSize = 1
+    Object.assign(app, { lastExecutionError: new Error('failed') })
+
+    ui.setStatus({ exec_info: { queue_remaining: 0 } })
+
+    expect(app.queuePrompt).not.toHaveBeenCalled()
+    expect(ui.lastQueueSize).toBe(0)
+  })
+
+  it('tracks graph changes for change-mode auto queueing', () => {
+    const ui = new ComfyUI(app)
+    const graphChanged = vi
+      .mocked(api.addEventListener)
+      .mock.calls.find(([eventName]) => eventName === 'graphChanged')?.[1]
+    if (!graphChanged) throw new Error('Missing graphChanged listener')
+
+    ui.autoQueueEnabled = true
+    ui.autoQueueMode = 'change'
+    ui.lastQueueSize = 1
+    graphChanged(fromAny(new CustomEvent('graphChanged')))
+
+    expect(ui.graphHasChanged).toBe(true)
+
+    ui.lastQueueSize = 0
+    graphChanged(fromAny(new CustomEvent('graphChanged')))
+
+    expect(app.queuePrompt).toHaveBeenCalledWith(0, 1)
+    expect(ui.graphHasChanged).toBe(false)
+  })
+
+  it('wires primary menu buttons to app and command actions', async () => {
+    const ui = new ComfyUI(app)
+
+    await click(buttonByText(document, 'Queue Prompt'))
+    expect(app.queuePrompt).toHaveBeenCalledWith(0, 1)
+
+    await click(buttonByText(document, 'Queue Front'))
+    expect(app.queuePrompt).toHaveBeenCalledWith(-1, 1)
+
+    await click(buttonByText(document, 'Save'))
+    await click(buttonByText(document, 'Save (API Format)'))
+    await click(buttonByText(document, 'Refresh'))
+    await click(buttonByText(document, 'Clipspace'))
+    await click(buttonByText(document, 'Clear'))
+    await click(buttonByText(document, 'Load Default'))
+    await click(buttonByText(document, 'Reset View'))
+
+    expect(app.refreshComboInNodes).toHaveBeenCalled()
+    expect(app.openClipspace).toHaveBeenCalled()
+    expect(app.clean).toHaveBeenCalled()
+    expect(app.loadGraphData).toHaveBeenCalledWith()
+    expect(ui.menuContainer.style.display).toBe('none')
+  })
+
+  it('wires file input and legacy option controls', async () => {
+    const ui = new ComfyUI(app)
+    const file = new File(['{}'], 'workflow.json', {
+      type: 'application/json'
+    })
+    const fileInput = document.getElementById(
+      'comfy-file-input'
+    ) as HTMLInputElement
+    Object.defineProperty(fileInput, 'files', {
+      configurable: true,
+      value: [file]
+    })
+
+    await Promise.resolve(
+      fileInput.onchange?.call(fileInput, new Event('change'))
+    )
+    expect(app.handleFile).toHaveBeenCalledWith(file, 'file_button')
+    expect(fileInput.value).toBe('')
+
+    const range = document.getElementById(
+      'batchCountInputRange'
+    ) as HTMLInputElement
+    const number = document.getElementById(
+      'batchCountInputNumber'
+    ) as HTMLInputElement
+    range.value = '4'
+    const extraOptionsCheckbox = document.querySelector(
+      'label input[type="checkbox"]'
+    ) as HTMLInputElement
+    extraOptionsCheckbox.checked = true
+    extraOptionsCheckbox.onchange?.call(
+      extraOptionsCheckbox,
+      fromPartial({ srcElement: extraOptionsCheckbox })
+    )
+    expect(ui.batchCount).toBe(4)
+    expect(document.getElementById('extraOptions')?.style.display).toBe('block')
+
+    number.value = '7'
+    number.oninput?.call(number, fromPartial({ target: number }))
+    expect(range.value).toBe('7')
+
+    range.value = '9'
+    range.oninput?.call(range, fromPartial({ srcElement: range }))
+    expect(number.value).toBe('9')
+
+    const autoQueueCheckbox = document.getElementById(
+      'autoQueueCheckbox'
+    ) as HTMLInputElement
+    autoQueueCheckbox.checked = true
+    autoQueueCheckbox.onchange?.call(
+      autoQueueCheckbox,
+      fromPartial({ target: autoQueueCheckbox })
+    )
+    expect(ui.autoQueueEnabled).toBe(true)
+
+    extraOptionsCheckbox.checked = false
+    extraOptionsCheckbox.onchange?.call(
+      extraOptionsCheckbox,
+      fromPartial({ srcElement: extraOptionsCheckbox })
+    )
+    expect(ui.batchCount).toBe(1)
+    expect(ui.autoQueueEnabled).toBe(false)
+    expect(document.getElementById('extraOptions')?.style.display).toBe('none')
+  })
+
+  it('toggles queue visibility through the menu button', async () => {
+    vi.mocked(api.getQueue).mockResolvedValue({
+      Running: [],
+      Pending: []
+    } as never)
+    const ui = new ComfyUI(app)
+
+    await click(buttonByText(document, 'View Queue'))
+    expect(ui.queue.visible).toBe(true)
+
+    await click(buttonByText(document, 'Close'))
+    expect(ui.queue.visible).toBe(false)
+  })
+
+  it('does not clear or load defaults when confirmation is declined', async () => {
+    mockSettingStore.get.mockReturnValue(true)
+    vi.stubGlobal(
+      'confirm',
+      vi.fn(() => false)
+    )
+    try {
+      new ComfyUI(app)
+
+      await click(buttonByText(document, 'Clear'))
+      await click(buttonByText(document, 'Load Default'))
+
+      expect(app.clean).not.toHaveBeenCalled()
+      expect(app.loadGraphData).not.toHaveBeenCalled()
+    } finally {
+      vi.unstubAllGlobals()
+    }
+  })
+
+  it('persists manual menu dragging', () => {
+    Object.defineProperty(document.body, 'clientWidth', {
+      configurable: true,
+      value: 1000
+    })
+    Object.defineProperty(document.body, 'clientHeight', {
+      configurable: true,
+      value: 800
+    })
+    const ui = new ComfyUI(app)
+    ui.menuContainer.style.display = 'block'
+    Object.defineProperty(ui.menuContainer, 'clientWidth', {
+      configurable: true,
+      value: 100
+    })
+    Object.defineProperty(ui.menuContainer, 'clientHeight', {
+      configurable: true,
+      value: 80
+    })
+    Object.defineProperty(ui.menuContainer, 'offsetLeft', {
+      configurable: true,
+      get: () => 700
+    })
+    Object.defineProperty(ui.menuContainer, 'offsetTop', {
+      configurable: true,
+      get: () => 20
+    })
+    const handle = ui.menuContainer.querySelector('.drag-handle') as HTMLElement
+
+    handle.onmousedown?.(
+      new MouseEvent('mousedown', { clientX: 10, clientY: 10 })
+    )
+    document.onmousemove?.(
+      new MouseEvent('mousemove', { clientX: 20, clientY: 30 })
+    )
+    document.onmouseup?.(new MouseEvent('mouseup'))
+
+    expect(ui.menuContainer.classList.contains('comfy-menu-manual-pos')).toBe(
+      true
+    )
+    expect(ui.menuContainer.style.right).toBe('190px')
+    expect(localStorage.getItem('Comfy.MenuPosition')).toBe(
+      JSON.stringify({ x: 700, y: 20 })
+    )
+    expect(document.onmousemove).toBeNull()
+    expect(document.onmouseup).toBeNull()
+  })
+})

src/scripts/ui/components/button.test.ts

@@ -0,0 +1,199 @@
+import { fromAny } from '@total-typescript/shoehorn'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import type { ComfyApp } from '@/scripts/app'
+
+vi.mock('../../ui', () => ({
+  $el: (tag: string, props?: Record<string, unknown>, children?: Node[]) => {
+    const [tagName, ...classes] = tag.split('.')
+    const element = document.createElement(tagName)
+    if (classes.length) element.classList.add(...classes)
+    if (props) {
+      const listeners = Object.entries(props).filter(([key]) =>
+        key.startsWith('on')
+      )
+      for (const [key, listener] of listeners) {
+        if (typeof listener === 'function') {
+          element.addEventListener(key.slice(2), listener as EventListener)
+        }
+      }
+    }
+    if (children) element.append(...children)
+    return element
+  }
+}))
+
+vi.mock('../../utils', () => ({
+  prop: <T>(
+    target: object,
+    name: string,
+    defaultValue: T,
+    onChanged?: (currentValue: T, previousValue: T) => void
+  ) => {
+    let currentValue: T
+    Object.defineProperty(target, name, {
+      get() {
+        return currentValue
+      },
+      set(newValue: T) {
+        const previousValue = currentValue
+        currentValue = newValue
+        onChanged?.(currentValue, previousValue)
+      }
+    })
+    ;(target as Record<string, T>)[name] = defaultValue
+    return defaultValue
+  }
+}))
+
+import { ComfyButton } from './button'
+
+class MockPopup extends EventTarget {
+  element = document.createElement('div')
+  open = false
+  toggle = vi.fn(() => {
+    this.open = !this.open
+    this.dispatchEvent(new CustomEvent('change'))
+  })
+}
+
+function mockApp(settingValue: boolean) {
+  let listener: (() => void) | undefined
+  const app = {
+    ui: {
+      settings: {
+        getSettingValue: vi.fn(() => settingValue),
+        addEventListener: vi.fn((_event: string, callback: () => void) => {
+          listener = callback
+        })
+      }
+    }
+  } as unknown as ComfyApp
+  return {
+    app,
+    setSettingValue(value: boolean) {
+      settingValue = value
+      listener?.()
+    }
+  }
+}
+
+describe('ComfyButton', () => {
+  beforeEach(() => {
+    document.body.replaceChildren()
+  })
+
+  it('renders icon, content, tooltip, enabled state, and click action', () => {
+    const action = vi.fn()
+    const button = new ComfyButton({
+      icon: 'play',
+      overIcon: 'pause',
+      iconSize: 18,
+      content: 'Run',
+      tooltip: 'Queue prompt',
+      enabled: false,
+      classList: { primary: true, hiddenClass: false },
+      action
+    })
+
+    expect(button.iconElement.className).toBe('mdi mdi-play mdi-18px')
+    expect(button.contentElement.textContent).toBe('Run')
+    expect(button.element.title).toBe('Queue prompt')
+    expect(button.element.getAttribute('aria-label')).toBe('Queue prompt')
+    expect(button.element.classList.contains('primary')).toBe(true)
+    expect(button.element.classList.contains('disabled')).toBe(true)
+    expect((button.element as HTMLButtonElement).disabled).toBe(true)
+
+    button.enabled = true
+    button.element.dispatchEvent(new MouseEvent('mouseenter'))
+    expect(button.iconElement.className).toBe('mdi mdi-pause mdi-18px')
+    button.element.dispatchEvent(new MouseEvent('mouseleave'))
+    expect(button.iconElement.className).toBe('mdi mdi-play mdi-18px')
+
+    button.element.dispatchEvent(new MouseEvent('click'))
+    expect(action).toHaveBeenCalledWith(expect.any(MouseEvent), button)
+  })
+
+  it('supports HTMLElement content and removing tooltip text', () => {
+    const button = new ComfyButton({ content: 'Text', tooltip: 'Hint' })
+    const content = document.createElement('strong')
+    content.textContent = 'Element'
+
+    button.content = content
+    button.tooltip = ''
+
+    expect(button.contentElement.firstElementChild).toBe(content)
+    expect(button.element.hasAttribute('title')).toBe(false)
+  })
+
+  it('updates the hover icon when overIcon changes while hovered', () => {
+    const button = new ComfyButton({ icon: 'play' })
+
+    button.element.dispatchEvent(new MouseEvent('mouseenter'))
+    button.overIcon = 'pause'
+
+    expect(button.iconElement.className).toBe('mdi mdi-pause')
+  })
+
+  it('hides and shows from a visibility setting', () => {
+    const settings = mockApp(false)
+    const button = new ComfyButton({
+      app: settings.app,
+      visibilitySetting: {
+        id: 'Comfy.UseNewMenu',
+        showValue: true
+      }
+    })
+
+    expect(button.hidden).toBe(true)
+    expect(button.element.classList.contains('hidden')).toBe(true)
+
+    settings.setSettingValue(true)
+
+    expect(button.hidden).toBe(false)
+    expect(button.element.classList.contains('hidden')).toBe(false)
+  })
+
+  it('toggles click popups and reflects popup open state in classes', () => {
+    const popup = new MockPopup()
+    const button = new ComfyButton({ icon: 'dots' }).withPopup(fromAny(popup))
+
+    button.element.dispatchEvent(new MouseEvent('click'))
+
+    expect(popup.toggle).toHaveBeenCalledOnce()
+    expect(button.element.classList.contains('popup-open')).toBe(true)
+
+    popup.toggle()
+
+    expect(button.element.classList.contains('popup-closed')).toBe(true)
+  })
+
+  it('opens hover popups while either the button or popup is hovered', () => {
+    const popup = new MockPopup()
+    const button = new ComfyButton({ icon: 'dots' }).withPopup(
+      fromAny(popup),
+      'hover'
+    )
+
+    button.element.dispatchEvent(new MouseEvent('mouseenter'))
+    expect(popup.open).toBe(true)
+    popup.element.dispatchEvent(new MouseEvent('mouseenter'))
+    button.element.dispatchEvent(new MouseEvent('mouseleave'))
+    expect(popup.open).toBe(true)
+    popup.element.dispatchEvent(new MouseEvent('mouseleave'))
+    expect(popup.open).toBe(false)
+  })
+
+  it('does not click-toggle a hover popup while hovered', () => {
+    const popup = new MockPopup()
+    const button = new ComfyButton({ icon: 'dots' }).withPopup(
+      fromAny(popup),
+      'hover'
+    )
+
+    button.element.dispatchEvent(new MouseEvent('mouseenter'))
+    button.element.dispatchEvent(new MouseEvent('click'))
+
+    expect(popup.toggle).not.toHaveBeenCalled()
+  })
+})

src/scripts/ui/components/popup.test.ts

@@ -0,0 +1,284 @@
+import { fromAny } from '@total-typescript/shoehorn'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+type ElChild = Node | string
+type ElInput = Record<string, unknown> | ElChild | ElChild[]
+
+function appendChildren(element: HTMLElement, children: ElChild | ElChild[]) {
+  const list = Array.isArray(children) ? children : [children]
+  for (const child of list) {
+    element.append(child)
+  }
+}
+
+vi.mock('../../ui', () => ({
+  $el: (tag: string, propsOrChildren?: ElInput, children?: ElChild[]) => {
+    const [tagName, ...classes] = tag.split('.')
+    const element = document.createElement(tagName)
+    if (classes.length) element.classList.add(...classes)
+
+    if (
+      propsOrChildren instanceof Node ||
+      typeof propsOrChildren === 'string' ||
+      Array.isArray(propsOrChildren)
+    ) {
+      appendChildren(element, propsOrChildren)
+    } else if (propsOrChildren) {
+      for (const [key, value] of Object.entries(propsOrChildren)) {
+        if (key === '$' && typeof value === 'function') {
+          value(element)
+        } else if (key === 'parent' && value instanceof HTMLElement) {
+          value.append(element)
+        } else if (key === 'textContent') {
+          element.textContent = String(value)
+        } else if (key === 'ariaLabel') {
+          element.setAttribute('aria-label', String(value))
+        } else if (key === 'ariaHasPopup') {
+          element.setAttribute('aria-haspopup', String(value))
+        } else if (key === 'type') {
+          element.setAttribute('type', String(value))
+        } else if (
+          key.toLowerCase().startsWith('on') &&
+          typeof value === 'function'
+        ) {
+          element.addEventListener(
+            key.slice(2).toLowerCase(),
+            value as EventListener
+          )
+        }
+      }
+    }
+
+    if (children) appendChildren(element, children)
+    return element
+  }
+}))
+
+vi.mock('../../utils', () => ({
+  prop: <T>(
+    target: object,
+    name: string,
+    defaultValue: T,
+    onChanged?: (currentValue: T, previousValue: T) => void
+  ) => {
+    let currentValue: T
+    Object.defineProperty(target, name, {
+      get() {
+        return currentValue
+      },
+      set(newValue: T) {
+        const previousValue = currentValue
+        currentValue = newValue
+        onChanged?.(currentValue, previousValue)
+      }
+    })
+    ;(target as Record<string, T>)[name] = defaultValue
+    return defaultValue
+  }
+}))
+
+vi.mock('../utils', () => ({
+  applyClasses: (
+    element: HTMLElement,
+    classList: string | Record<string, boolean>,
+    ...baseClasses: string[]
+  ) => {
+    element.className = baseClasses.join(' ')
+    if (typeof classList === 'string') {
+      element.classList.add(...classList.split(' ').filter(Boolean))
+    } else {
+      for (const [className, enabled] of Object.entries(classList)) {
+        element.classList.toggle(className, enabled)
+      }
+    }
+  },
+  toggleElement:
+    <T>(
+      element: HTMLElement,
+      {
+        onShow
+      }: {
+        onShow?: (element: HTMLElement, value: T) => void
+      } = {}
+    ) =>
+    (value: T) => {
+      element.hidden = !value
+      if (value) onShow?.(element, value)
+    }
+}))
+
+import { ComfyAsyncDialog } from './asyncDialog'
+import { ComfyButton } from './button'
+import { ComfyButtonGroup } from './buttonGroup'
+import { ComfyPopup } from './popup'
+import { ComfySplitButton } from './splitButton'
+
+function targetWithRect(rect: DOMRect) {
+  const target = document.createElement('button')
+  vi.spyOn(target, 'getBoundingClientRect').mockReturnValue(rect)
+  document.body.append(target)
+  return target
+}
+
+describe('ComfyPopup and related UI components', () => {
+  beforeEach(() => {
+    document.body.replaceChildren()
+    vi.restoreAllMocks()
+  })
+
+  it('opens, positions, updates children and classes, and closes from escape', () => {
+    const target = targetWithRect(
+      DOMRect.fromRect({ x: 10, y: 20, width: 80, height: 30 })
+    )
+    const child = document.createElement('span')
+    const popup = new ComfyPopup(
+      { target, classList: { menu: true, hidden: false } },
+      child
+    )
+    const open = vi.fn()
+    const close = vi.fn()
+    const change = vi.fn()
+    popup.addEventListener('open', open)
+    popup.addEventListener('close', close)
+    popup.addEventListener('change', change)
+    vi.spyOn(popup.element, 'getBoundingClientRect').mockReturnValue(
+      DOMRect.fromRect({ height: 20 })
+    )
+
+    popup.open = true
+
+    expect(open).toHaveBeenCalledOnce()
+    expect(change).toHaveBeenCalledOnce()
+    expect(popup.element).toHaveClass('open')
+    expect(popup.element.style.getPropertyValue('--left')).toBe('10px')
+    expect(popup.element.style.getPropertyValue('--bottom')).toBe('35px')
+
+    const nextChild = document.createElement('strong')
+    popup.children = [nextChild]
+    popup.classList = 'extra'
+
+    expect(popup.element.firstElementChild).toBe(nextChild)
+    expect(popup.element).toHaveClass('comfyui-popup', 'left', 'extra')
+
+    window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Enter' }))
+    expect(popup.open).toBe(true)
+
+    const escape = new KeyboardEvent('keydown', {
+      key: 'Escape',
+      cancelable: true
+    })
+    window.dispatchEvent(escape)
+
+    expect(close).toHaveBeenCalledOnce()
+    expect(escape.defaultPrevented).toBe(true)
+    expect(popup.open).toBe(false)
+  })
+
+  it('handles outside clicks, target clicks, and relative right positioning', () => {
+    const target = targetWithRect(
+      DOMRect.fromRect({ x: 100, y: 40, width: 60, height: 25 })
+    )
+    const container = document.createElement('section')
+    document.body.append(container)
+    const popup = new ComfyPopup({
+      target,
+      container,
+      position: 'relative',
+      horizontal: 'right'
+    })
+    vi.spyOn(popup.element, 'getBoundingClientRect').mockReturnValue(
+      DOMRect.fromRect({ height: 100 })
+    )
+    Object.defineProperty(popup.element, 'clientWidth', {
+      configurable: true,
+      value: 40
+    })
+
+    popup.open = true
+    target.dispatchEvent(new MouseEvent('click', { bubbles: true }))
+    expect(popup.open).toBe(true)
+
+    const outside = document.createElement('div')
+    document.body.append(outside)
+    outside.dispatchEvent(new MouseEvent('click', { bubbles: true }))
+
+    expect(popup.open).toBe(false)
+    expect(popup.element.style.getPropertyValue('--left')).toBe('0px')
+    expect(popup.element.style.getPropertyValue('--top')).toBe('25px')
+  })
+
+  it('keeps outside clicks open when target clicks are not ignored', () => {
+    const target = targetWithRect(DOMRect.fromRect({ height: 10 }))
+    const popup = new ComfyPopup({
+      target,
+      ignoreTarget: false,
+      closeOnEscape: false
+    })
+    const outside = document.createElement('div')
+    document.body.append(outside)
+
+    popup.toggle()
+    outside.dispatchEvent(new MouseEvent('click', { bubbles: true }))
+    window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape' }))
+
+    expect(popup.open).toBe(true)
+  })
+
+  it('renders split button popup items and updates button groups', () => {
+    const primary = new ComfyButton({ content: 'Queue' })
+    const itemButton = new ComfyButton({ content: 'Queue front' })
+    const rawItem = document.createElement('button')
+    rawItem.textContent = 'Queue back'
+    const split = new ComfySplitButton(
+      {
+        primary,
+        mode: 'hover',
+        horizontal: 'right',
+        position: 'absolute'
+      },
+      itemButton,
+      rawItem
+    )
+
+    expect(split.element).toHaveClass('comfyui-split-button', 'hover')
+    expect(split.popup.element).toHaveTextContent('Queue front')
+    expect(split.popup.element).toHaveTextContent('Queue back')
+    expect(document.body).toContainElement(split.popup.element)
+
+    const group = new ComfyButtonGroup(primary)
+    group.append(itemButton)
+    group.insert(fromAny(rawItem), 1)
+
+    expect(group.element.children).toHaveLength(3)
+    expect(group.remove(itemButton)).toEqual([itemButton])
+    expect(group.remove(itemButton)).toBeUndefined()
+    expect(group.element.children).toHaveLength(2)
+  })
+
+  it('resolves async dialogs from buttons, close events, and prompt actions', async () => {
+    const dialog = new ComfyAsyncDialog<number>([
+      { text: 'Seven', value: 7 },
+      'Fallback'
+    ])
+
+    const promise = dialog.show('Pick one')
+    dialog.element.querySelector<HTMLButtonElement>('button')?.click()
+    await expect(promise).resolves.toBe(7)
+
+    const closePromise = dialog.show(document.createElement('em'))
+    dialog.element.dispatchEvent(new Event('close'))
+    await expect(closePromise).resolves.toBeNull()
+
+    const promptPromise = ComfyAsyncDialog.prompt({
+      title: 'Confirm',
+      message: 'Continue?',
+      actions: [{ text: 'Yes', value: 'yes' }]
+    })
+    const prompt = Array.from(document.querySelectorAll('dialog')).at(-1)
+    expect(prompt).toHaveTextContent('Confirm')
+    prompt?.querySelector<HTMLButtonElement>('button')?.click()
+
+    await expect(promptPromise).resolves.toBe('yes')
+    expect(document.body).not.toContainElement(prompt ?? null)
+  })
+})

src/scripts/ui/dialog.test.ts

@@ -0,0 +1,69 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+import { ComfyDialog } from './dialog'
+
+const mocks = vi.hoisted(() => ({
+  $el: (
+    selector: string,
+    propsOrChildren?: Record<string, unknown> | Node[],
+    maybeChildren?: Node[]
+  ) => {
+    const [tag, ...classes] = selector.split('.')
+    const element = document.createElement(tag || 'div')
+    element.classList.add(...classes.filter(Boolean))
+    const children = Array.isArray(propsOrChildren)
+      ? propsOrChildren
+      : maybeChildren
+
+    if (propsOrChildren && !Array.isArray(propsOrChildren)) {
+      for (const [key, value] of Object.entries(propsOrChildren)) {
+        if (key === 'parent' && value instanceof Node) {
+          value.appendChild(element)
+        } else if (key === '$' && typeof value === 'function') {
+          value(element)
+        } else {
+          Reflect.set(element, key, value)
+        }
+      }
+    }
+
+    element.append(...(children ?? []))
+    return element
+  }
+}))
+
+vi.mock('../ui', () => ({
+  $el: mocks.$el
+}))
+
+describe('ComfyDialog', () => {
+  afterEach(() => {
+    document.body.replaceChildren()
+  })
+
+  it('shows string and element content and closes through the default button', () => {
+    const dialog = new ComfyDialog()
+
+    dialog.show('<strong>Hello</strong>')
+
+    expect(dialog.element.style.display).toBe('flex')
+    expect(dialog.textElement.innerHTML).toBe('<strong>Hello</strong>')
+
+    dialog.element.querySelector('button')?.click()
+    expect(dialog.element.style.display).toBe('none')
+
+    const first = document.createElement('span')
+    const second = document.createElement('em')
+    dialog.show([first, second])
+
+    expect([...dialog.textElement.children]).toEqual([first, second])
+  })
+
+  it('uses supplied custom buttons', () => {
+    const button = document.createElement('button')
+    const dialog = new ComfyDialog('section', [button])
+
+    expect(dialog.element.tagName).toBe('SECTION')
+    expect(dialog.element.querySelector('button')).toBe(button)
+  })
+})

src/scripts/ui/draggableList.test.ts

@@ -0,0 +1,216 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+import { DraggableList } from './draggableList'
+
+function createList(itemCount: number) {
+  const container = document.createElement('div')
+  const items = Array.from({ length: itemCount }, (_, index) => {
+    const item = document.createElement('div')
+    item.className = 'item'
+    item.dataset.index = String(index)
+
+    const handle = document.createElement('button')
+    handle.className = 'drag-handle'
+    item.append(handle)
+    container.append(item)
+
+    return item
+  })
+  document.body.append(container)
+  return { container, items }
+}
+
+function setRect(element: Element, top: number, height = 20) {
+  return vi
+    .spyOn(element, 'getBoundingClientRect')
+    .mockReturnValue(new DOMRect(0, top, 100, height))
+}
+
+function defineScrollMetrics(
+  container: HTMLElement,
+  scrollHeight: number,
+  clientHeight: number
+) {
+  Object.defineProperty(container, 'scrollHeight', {
+    configurable: true,
+    value: scrollHeight
+  })
+  Object.defineProperty(container, 'clientHeight', {
+    configurable: true,
+    value: clientHeight
+  })
+}
+
+function mouseDragEvent(
+  target: Element,
+  overrides: Partial<MouseEvent> = {}
+): MouseEvent {
+  return {
+    button: 0,
+    clientX: 0,
+    clientY: 0,
+    preventDefault: vi.fn(),
+    target,
+    ...overrides
+  } satisfies Partial<MouseEvent> as MouseEvent
+}
+
+describe('DraggableList', () => {
+  afterEach(() => {
+    document.body.replaceChildren()
+    vi.restoreAllMocks()
+    vi.unstubAllGlobals()
+  })
+
+  it('ignores missing containers and non-primary drag starts', () => {
+    const listWithoutContainer = new DraggableList(null, '.item')
+    const { container, items } = createList(1)
+    const list = new DraggableList(container, '.item')
+
+    list.dragStart(
+      mouseDragEvent(items[0].querySelector('.drag-handle')!, { button: 1 })
+    )
+    list.dragEnd()
+
+    expect(listWithoutContainer.listContainer).toBeNull()
+    expect(list.draggableItem).toBeUndefined()
+  })
+
+  it('starts from a handle, scrolls downward, and reorders upward', () => {
+    vi.stubGlobal('requestAnimationFrame', (callback: FrameRequestCallback) => {
+      callback(0)
+      return 1
+    })
+    const { container, items } = createList(3)
+    const scrollBy = vi.fn((_left: number, top: number) => {
+      container.scrollTop += top
+    })
+    container.scrollBy = scrollBy as unknown as typeof container.scrollBy
+    defineScrollMetrics(container, 120, 80)
+    vi.spyOn(container, 'getBoundingClientRect').mockReturnValue(
+      new DOMRect(0, 0, 100, 80)
+    )
+    setRect(items[0], 0)
+    setRect(items[1], 30)
+    setRect(items[2], 60)
+
+    const list = new DraggableList(container, '.item')
+    const dragStart = vi.fn()
+    const dragEnd = vi.fn()
+    list.addEventListener('dragstart', dragStart)
+    list.addEventListener('dragend', dragEnd)
+
+    list.dragStart(
+      mouseDragEvent(items[2].querySelector('.drag-handle')!, {
+        clientX: 10,
+        clientY: 70
+      })
+    )
+    list.drag(
+      mouseDragEvent(items[2].querySelector('.drag-handle')!, {
+        clientX: 20,
+        clientY: 100
+      })
+    )
+    items[1].dataset.isToggled = ''
+    list.dragEnd()
+
+    expect(dragStart).toHaveBeenCalledOnce()
+    expect(dragEnd).toHaveBeenCalledOnce()
+    expect(scrollBy).toHaveBeenCalledWith(0, 10)
+    expect([...container.children]).toEqual([items[0], items[2], items[1]])
+    expect(items[0].classList.contains('is-idle')).toBe(true)
+    expect(items[1].classList.contains('is-idle')).toBe(true)
+  })
+
+  it('supports touch coordinates, upward scrolling, and downward reorder', () => {
+    vi.stubGlobal('requestAnimationFrame', (callback: FrameRequestCallback) => {
+      callback(0)
+      return 1
+    })
+    const { container, items } = createList(3)
+    const scrollBy = vi.fn((_left: number, top: number) => {
+      container.scrollTop += top
+    })
+    container.scrollTop = 10
+    container.scrollBy = scrollBy as unknown as typeof container.scrollBy
+    defineScrollMetrics(container, 120, 80)
+    vi.spyOn(container, 'getBoundingClientRect').mockReturnValue(
+      new DOMRect(0, 20, 100, 80)
+    )
+    setRect(items[0], 0)
+    setRect(items[1], 30)
+    setRect(items[2], 60)
+
+    const list = new DraggableList(container, '.item')
+    const touchStart = {
+      button: 0,
+      clientX: 0,
+      clientY: 0,
+      preventDefault: vi.fn(),
+      target: items[0].querySelector('.drag-handle')!,
+      touches: [{ clientX: 5, clientY: 30 }]
+    } as unknown as TouchEvent
+    const touchMove = {
+      clientX: 0,
+      clientY: 0,
+      preventDefault: vi.fn(),
+      target: items[0].querySelector('.drag-handle')!,
+      touches: [{ clientX: 8, clientY: 10 }]
+    } as unknown as TouchEvent
+
+    list.dragStart(touchStart)
+    list.drag(touchMove)
+    items[1].dataset.isToggled = ''
+    list.dragEnd()
+
+    expect(scrollBy).toHaveBeenCalledWith(0, -10)
+    expect([...container.children]).toEqual([items[1], items[0], items[2]])
+  })
+
+  it('updates idle item state around the dragged item midpoint', () => {
+    const { container, items } = createList(3)
+    const list = new DraggableList(container, '.item')
+    const state = list as unknown as {
+      items: HTMLElement[]
+      draggableItem: HTMLElement
+    }
+    state.items = items
+    state.draggableItem = items[1]
+    list.itemsGap = 5
+    items[0].classList.add('is-idle')
+    items[1].classList.add('is-idle')
+    items[2].classList.add('is-idle')
+    items[0].dataset.isAbove = ''
+    const draggedRect = setRect(items[1], -10)
+    setRect(items[0], 0)
+    setRect(items[2], 60)
+
+    list.updateIdleItemsStateAndPosition()
+
+    expect(items[0].dataset.isToggled).toBe('')
+    expect(items[0].style.transform).toBe('translateY(25px)')
+    expect(items[2].style.transform).toBe('')
+
+    draggedRect.mockReturnValue(new DOMRect(0, 100, 100, 20))
+    list.updateIdleItemsStateAndPosition()
+
+    expect(items[0].dataset.isToggled).toBeUndefined()
+    expect(items[2].dataset.isToggled).toBe('')
+    expect(items[2].style.transform).toBe('translateY(-25px)')
+  })
+
+  it('uses zero gap for short lists and disposes listeners', () => {
+    const { container } = createList(1)
+    const list = new DraggableList(container, '.item')
+    const off = vi.fn()
+    const disposableList = list as unknown as { off: Array<() => void> }
+    disposableList.off = [off]
+
+    list.setItemsGap()
+    list.dispose()
+
+    expect(list.itemsGap).toBe(0)
+    expect(off).toHaveBeenCalledOnce()
+  })
+})

src/scripts/ui/imagePreview.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from 'vitest'
+
+import { calculateImageGrid } from './imagePreview'
+
+function createImage(width: number, height: number) {
+  const img = document.createElement('img')
+  Object.defineProperty(img, 'naturalWidth', {
+    configurable: true,
+    value: width
+  })
+  Object.defineProperty(img, 'naturalHeight', {
+    configurable: true,
+    value: height
+  })
+  return img
+}
+
+describe('imagePreview', () => {
+  it('calculates the highest-area grid', () => {
+    const images = [
+      createImage(100, 100),
+      createImage(100, 100),
+      createImage(100, 100)
+    ]
+
+    expect(calculateImageGrid(images, 300, 120)).toMatchObject({
+      cellWidth: 100,
+      cellHeight: 100,
+      cols: 3,
+      rows: 1
+    })
+  })
+})

src/scripts/ui/toggleSwitch.test.ts

@@ -0,0 +1,86 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+import { toggleSwitch } from './toggleSwitch'
+
+const mocks = vi.hoisted(() => ({
+  $el: (
+    selector: string,
+    propsOrChildren?: Record<string, unknown> | Node[] | Node,
+    maybeChildren?: Node[] | Node
+  ) => {
+    const [tag, ...classes] = selector.split('.')
+    const element = document.createElement(tag || 'div')
+    element.classList.add(...classes.filter(Boolean))
+    const children = Array.isArray(propsOrChildren)
+      ? propsOrChildren
+      : propsOrChildren instanceof Node
+        ? [propsOrChildren]
+        : Array.isArray(maybeChildren)
+          ? maybeChildren
+          : maybeChildren instanceof Node
+            ? [maybeChildren]
+            : []
+
+    if (
+      propsOrChildren &&
+      !(propsOrChildren instanceof Node) &&
+      !Array.isArray(propsOrChildren)
+    ) {
+      for (const [key, value] of Object.entries(propsOrChildren)) {
+        Reflect.set(element, key, value)
+      }
+    }
+
+    element.append(...children)
+    return element
+  }
+}))
+
+vi.mock('../ui', () => ({
+  $el: mocks.$el
+}))
+
+describe('toggleSwitch', () => {
+  afterEach(() => {
+    document.body.replaceChildren()
+  })
+
+  it('selects the first item when none is preselected', () => {
+    const onChange = vi.fn()
+    const container = toggleSwitch('mode', ['first', 'second'], { onChange })
+    const labels = [...container.querySelectorAll('label')]
+    const inputs = [...container.querySelectorAll('input')]
+
+    expect(labels[0].classList.contains('comfy-toggle-selected')).toBe(true)
+    expect((inputs[0] as HTMLInputElement).checked).toBe(true)
+    expect(onChange).toHaveBeenCalledWith({
+      item: 'first',
+      prev: undefined
+    })
+  })
+
+  it('moves selection and reports the previous item', () => {
+    const onChange = vi.fn()
+    const container = toggleSwitch(
+      'mode',
+      [
+        { text: 'first', tooltip: 'First option' },
+        { text: 'second', value: '2' }
+      ],
+      { onChange }
+    )
+    const labels = [...container.querySelectorAll('label')]
+    const secondInput = labels[1].querySelector('input') as HTMLInputElement
+
+    secondInput.onchange?.(new Event('change'))
+
+    expect(labels[0].classList.contains('comfy-toggle-selected')).toBe(false)
+    expect(labels[1].classList.contains('comfy-toggle-selected')).toBe(true)
+    expect(labels[0].title).toBe('First option')
+    expect(secondInput.value).toBe('2')
+    expect(onChange).toHaveBeenLastCalledWith({
+      item: { text: 'second', value: '2' },
+      prev: { text: 'first', tooltip: 'First option', value: 'first' }
+    })
+  })
+})

src/scripts/ui/utils.test.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { applyClasses, toggleElement } from './utils'
+
+describe('ui utils', () => {
+  it('applies string, array, object, and required classes', () => {
+    const element = document.createElement('div')
+
+    applyClasses(element, 'one two', 'required')
+    expect([...element.classList]).toEqual(['one', 'two', 'required'])
+
+    applyClasses(element, ['three', 'four'])
+    expect([...element.classList]).toEqual(['three', 'four'])
+
+    applyClasses(element, { five: true, six: false, seven: true })
+    expect([...element.classList]).toEqual(['five', 'seven'])
+
+    applyClasses(element, null as unknown as string)
+    expect(element.className).toBe('')
+  })
+
+  it('toggles an element through a placeholder', () => {
+    const parent = document.createElement('div')
+    const element = document.createElement('span')
+    const onHide = vi.fn()
+    const onShow = vi.fn()
+    parent.append(element)
+    const toggle = toggleElement(element, { onHide, onShow })
+
+    toggle(false)
+    expect(parent.firstChild).toBeInstanceOf(Comment)
+    expect(onHide).toHaveBeenCalledWith(element)
+
+    toggle(true)
+    expect(parent.firstChild).toBe(element)
+    expect(onShow).toHaveBeenCalledWith(element, true)
+
+    toggle('visible')
+    expect(onShow).toHaveBeenCalledWith(element, 'visible')
+
+    toggle(false)
+    expect(parent.firstChild).toBeInstanceOf(Comment)
+    expect(onHide).toHaveBeenCalledTimes(2)
+  })
+})

src/scripts/utils.test.ts

@@ -0,0 +1,127 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+import {
+  addStylesheet,
+  clone,
+  getStorageValue,
+  prop,
+  setStorageValue
+} from './utils'
+
+interface LinkAttrs {
+  href: string
+  onerror: (error: Event) => void
+  onload: () => void
+  parent: HTMLElement
+  rel: string
+  type: string
+}
+
+const mocks = vi.hoisted(() => ({
+  api: {
+    clientId: null as string | null,
+    initialClientId: null as string | null
+  },
+  $el: vi.fn()
+}))
+
+vi.mock('./api', () => ({
+  api: mocks.api
+}))
+
+vi.mock('./ui', () => ({
+  $el: mocks.$el
+}))
+
+function lastLinkAttrs() {
+  return mocks.$el.mock.calls.at(-1)?.[1] as LinkAttrs
+}
+
+describe('scripts utils', () => {
+  afterEach(() => {
+    localStorage.clear()
+    sessionStorage.clear()
+    mocks.api.clientId = null
+    mocks.api.initialClientId = null
+    mocks.$el.mockReset()
+    vi.unstubAllGlobals()
+  })
+
+  it('clones with structuredClone and falls back to JSON cloning', () => {
+    const source = { nested: { value: 1 } }
+
+    expect(clone(source)).toEqual(source)
+
+    vi.stubGlobal(
+      'structuredClone',
+      vi.fn(() => {
+        throw new Error('unsupported')
+      })
+    )
+
+    const cloned = clone(source)
+    cloned.nested.value = 2
+
+    expect(cloned).toEqual({ nested: { value: 2 } })
+    expect(source).toEqual({ nested: { value: 1 } })
+  })
+
+  it('adds stylesheets from script and relative URLs', async () => {
+    const scriptPromise = addStylesheet('/extensions/example.js')
+    lastLinkAttrs().onload()
+
+    await expect(scriptPromise).resolves.toBeUndefined()
+    expect(lastLinkAttrs()).toMatchObject({
+      href: '/extensions/example.css',
+      parent: document.head,
+      rel: 'stylesheet',
+      type: 'text/css'
+    })
+
+    const cssPromise = addStylesheet('theme.css', 'https://example.com/base/')
+    lastLinkAttrs().onload()
+
+    await expect(cssPromise).resolves.toBeUndefined()
+    expect(lastLinkAttrs().href).toBe('https://example.com/base/theme.css')
+  })
+
+  it('rejects when stylesheet loading fails', async () => {
+    const promise = addStylesheet('missing.css', 'https://example.com/')
+    const error = new Event('error')
+    lastLinkAttrs().onerror(error)
+
+    await expect(promise).rejects.toBe(error)
+  })
+
+  it('defines an observable property with the supplied default', () => {
+    const target = {}
+    const onChanged = vi.fn()
+
+    expect(prop(target, 'mode', 'initial', onChanged)).toBe('initial')
+    Object.assign(target, { mode: 'next' })
+
+    expect((target as { mode: string }).mode).toBe('next')
+    expect(onChanged).toHaveBeenCalledWith('next', undefined, target, 'mode')
+  })
+
+  it('uses client-scoped storage before local fallback', () => {
+    mocks.api.clientId = 'client-1'
+    setStorageValue('setting', 'client-value')
+    sessionStorage.removeItem('setting:client-1')
+
+    expect(getStorageValue('setting')).toBe('client-value')
+    expect(localStorage.getItem('setting')).toBe('client-value')
+
+    sessionStorage.setItem('setting:client-1', 'session-value')
+
+    expect(getStorageValue('setting')).toBe('session-value')
+  })
+
+  it('uses initial client id when the current client id is unavailable', () => {
+    mocks.api.initialClientId = 'initial-1'
+    setStorageValue('setting', 'initial-value')
+
+    expect(sessionStorage.getItem('setting:initial-1')).toBe('initial-value')
+    expect(getStorageValue('setting')).toBe('initial-value')
+  })
+})

src/scripts/widgets.test.ts

@@ -0,0 +1,356 @@
+import { fromAny } from '@total-typescript/shoehorn'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import type { LGraphNode } from '@/lib/litegraph/src/litegraph'
+import type {
+  IBaseWidget,
+  IComboWidget
+} from '@/lib/litegraph/src/types/widgets'
+import type { InputSpec } from '@/schemas/nodeDefSchema'
+
+const mockSettingGet = vi.hoisted(() => vi.fn())
+const mockNextValueForLinkedTarget = vi.hoisted(() => vi.fn())
+const mockIsComboWidget = vi.hoisted(() => vi.fn())
+const mockTransformInputSpecV1ToV2 = vi.hoisted(() => vi.fn())
+
+function v2WidgetConstructor(kind: string) {
+  return () => (_node: LGraphNode, inputSpec: { name: string }) => ({
+    name: `${kind}:${inputSpec.name}`,
+    options: { minNodeSize: [20, 30] }
+  })
+}
+
+vi.mock('@/i18n', () => ({
+  t: (key: string) => `translated:${key}`
+}))
+
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: () => ({
+    get: mockSettingGet
+  })
+}))
+
+vi.mock('@/lib/litegraph/src/litegraph', () => ({
+  isComboWidget: mockIsComboWidget
+}))
+
+vi.mock('./valueControl', () => ({
+  nextValueForLinkedTarget: mockNextValueForLinkedTarget
+}))
+
+vi.mock('@/schemas/nodeDef/migration', () => ({
+  transformInputSpecV1ToV2: mockTransformInputSpecV1ToV2
+}))
+
+vi.mock('@/core/graph/widgets/dynamicWidgets', () => ({
+  dynamicWidgets: {
+    DYNAMIC: () => ({
+      widget: { name: 'dynamic', options: {} },
+      minWidth: 1,
+      minHeight: 1
+    })
+  }
+}))
+
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useBooleanWidget',
+  () => ({ useBooleanWidget: v2WidgetConstructor('BOOLEAN') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useBoundingBoxWidget',
+  () => ({ useBoundingBoxWidget: v2WidgetConstructor('BOUNDING_BOX') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useCurveWidget',
+  () => ({ useCurveWidget: v2WidgetConstructor('CURVE') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useChartWidget',
+  () => ({ useChartWidget: v2WidgetConstructor('CHART') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useColorWidget',
+  () => ({ useColorWidget: v2WidgetConstructor('COLOR') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useComboWidget',
+  () => ({ useComboWidget: v2WidgetConstructor('COMBO') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useFloatWidget',
+  () => ({ useFloatWidget: v2WidgetConstructor('FLOAT') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useGalleriaWidget',
+  () => ({ useGalleriaWidget: v2WidgetConstructor('GALLERIA') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useBoundingBoxesWidget',
+  () => ({ useBoundingBoxesWidget: v2WidgetConstructor('BOUNDING_BOXES') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useColorsWidget',
+  () => ({ useColorsWidget: v2WidgetConstructor('COLORS') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useImageCompareWidget',
+  () => ({ useImageCompareWidget: v2WidgetConstructor('IMAGECOMPARE') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useImageUploadWidget',
+  () => ({
+    useImageUploadWidget: () => (_node: LGraphNode, inputName: string) => ({
+      widget: { name: `IMAGEUPLOAD:${inputName}`, options: {} },
+      minWidth: 5,
+      minHeight: 6
+    })
+  })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useIntWidget',
+  () => ({ useIntWidget: v2WidgetConstructor('INT') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useMarkdownWidget',
+  () => ({ useMarkdownWidget: v2WidgetConstructor('MARKDOWN') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/usePainterWidget',
+  () => ({ usePainterWidget: v2WidgetConstructor('PAINTER') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useRangeWidget',
+  () => ({ useRangeWidget: v2WidgetConstructor('RANGE') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useStringWidget',
+  () => ({ useStringWidget: v2WidgetConstructor('STRING') })
+)
+vi.mock(
+  '@/renderer/extensions/vueNodes/widgets/composables/useTextareaWidget',
+  () => ({ useTextareaWidget: v2WidgetConstructor('TEXTAREA') })
+)
+
+vi.mock('./domWidget', () => ({}))
+vi.mock('./errorNodeWidgets', () => ({}))
+
+import {
+  ComfyWidgets,
+  IS_CONTROL_WIDGET,
+  addValueControlWidget,
+  addValueControlWidgets,
+  isValidWidgetType,
+  updateControlWidgetLabel
+} from './widgets'
+
+// `linkedWidgets`, `beforeQueued`, and `afterQueued` already exist on
+// IBaseWidget (via the litegraph augmentation), so no extra members needed.
+type MockWidget = IBaseWidget
+
+function makeTargetWidget(overrides: Partial<MockWidget> = {}): MockWidget {
+  return {
+    name: 'seed',
+    value: 1,
+    callback: vi.fn(),
+    options: {},
+    linkedWidgets: [],
+    computedDisabled: false,
+    ...overrides
+  } as MockWidget
+}
+
+function makeNode(inputs: LGraphNode['inputs'] = []) {
+  const widgets: MockWidget[] = []
+  const node = {
+    id: 42,
+    inputs,
+    addWidget: vi.fn(
+      (
+        type: string,
+        name: string,
+        value: string,
+        callback: () => void,
+        options: Record<string, unknown>
+      ) => {
+        const widget: MockWidget = fromAny({
+          type,
+          name,
+          value,
+          callback,
+          options,
+          linkedWidgets: [],
+          computedDisabled: false
+        })
+        widgets.push(widget)
+        return widget
+      }
+    )
+  }
+  return { node: node as unknown as LGraphNode, widgets }
+}
+
+describe('widgets', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockSettingGet.mockReturnValue('after')
+    mockNextValueForLinkedTarget.mockReturnValue('next')
+    mockIsComboWidget.mockImplementation(
+      (widget: MockWidget) => widget.type === 'combo'
+    )
+    mockTransformInputSpecV1ToV2.mockImplementation(
+      (_inputData: InputSpec, options: { name: string }) => ({
+        name: options.name
+      })
+    )
+  })
+
+  it('updates the control widget label from the configured run mode', () => {
+    const widget = makeTargetWidget()
+
+    mockSettingGet.mockReturnValue('before')
+    updateControlWidgetLabel(widget)
+    expect(widget.label).toBe('translated:g.control_before_generate')
+
+    mockSettingGet.mockReturnValue('after')
+    updateControlWidgetLabel(widget)
+    expect(widget.label).toBe('translated:g.control_after_generate')
+  })
+
+  it('adds control and filter widgets for combo targets', () => {
+    const { node, widgets } = makeNode()
+    const target = makeTargetWidget({ type: 'combo', computedDisabled: true })
+
+    const result = addValueControlWidgets(node, target, '', undefined, [
+      'COMBO',
+      {
+        control_prefix: 'custom'
+      }
+    ] as unknown as InputSpec)
+
+    expect(result).toHaveLength(2)
+    expect(widgets[0].name).toBe('custom control_after_generate')
+    expect(widgets[0].value).toBe('randomize')
+    expect((widgets[0] as IComboWidget).options.values).toContain(
+      'increment-wrap'
+    )
+    expect(widgets[0][IS_CONTROL_WIDGET]).toBe(true)
+    expect(widgets[0].disabled).toBe(true)
+    expect(widgets[1].name).toBe('custom control_filter_list')
+    expect(widgets[1].disabled).toBe(true)
+  })
+
+  it('uses explicit option names and can skip the combo filter widget', () => {
+    const { node, widgets } = makeNode()
+    const target = makeTargetWidget({ type: 'combo' })
+
+    addValueControlWidgets(
+      node,
+      target,
+      'fixed',
+      {
+        addFilterList: false,
+        controlAfterGenerateName: 'mode'
+      },
+      ['COMBO', {}] as unknown as InputSpec
+    )
+
+    expect(widgets).toHaveLength(1)
+    expect(widgets[0].name).toBe('mode')
+  })
+
+  it('applies linked target values after queueing in after mode', () => {
+    const { node, widgets } = makeNode()
+    const target = makeTargetWidget()
+
+    addValueControlWidgets(node, target)
+    widgets[0].afterQueued?.({ isPartialExecution: true })
+
+    expect(mockNextValueForLinkedTarget).toHaveBeenCalledWith({
+      target,
+      linkedWidgets: target.linkedWidgets,
+      nodeId: 42,
+      isPartialExecution: true
+    })
+    expect(target.value).toBe('next')
+    expect(target.callback).toHaveBeenCalledWith('next')
+  })
+
+  it('waits until the second beforeQueued call in before mode', () => {
+    mockSettingGet.mockReturnValue('before')
+    const { node, widgets } = makeNode()
+    const target = makeTargetWidget()
+
+    addValueControlWidgets(node, target)
+    widgets[0].beforeQueued?.()
+    expect(mockNextValueForLinkedTarget).not.toHaveBeenCalled()
+
+    widgets[0].beforeQueued?.({ isPartialExecution: false })
+    expect(mockNextValueForLinkedTarget).toHaveBeenCalledWith(
+      expect.objectContaining({ isPartialExecution: false })
+    )
+  })
+
+  it('does not change the target when the target has a linked input or no next value', () => {
+    const { node, widgets } = makeNode([
+      { widget: { name: 'seed' }, link: 1 }
+    ] as LGraphNode['inputs'])
+    const target = makeTargetWidget()
+
+    addValueControlWidgets(node, target)
+    widgets[0].afterQueued?.()
+    expect(mockNextValueForLinkedTarget).not.toHaveBeenCalled()
+
+    const unlinked = makeNode()
+    mockNextValueForLinkedTarget.mockReturnValue(undefined)
+    addValueControlWidgets(unlinked.node, target)
+    unlinked.widgets[0].afterQueued?.()
+    expect(target.callback).not.toHaveBeenCalled()
+  })
+
+  it('uses the legacy single control widget name from input data before widgetName', () => {
+    const { node, widgets } = makeNode()
+    const target = makeTargetWidget()
+
+    const result = addValueControlWidget(
+      node,
+      target,
+      'fixed',
+      undefined,
+      'fallback',
+      [
+        'INT',
+        {
+          control_after_generate: 'from_input_data'
+        }
+      ] as unknown as InputSpec
+    )
+
+    expect(result).toBe(widgets[0])
+    expect(widgets[0].name).toBe('from_input_data')
+  })
+
+  it('exposes transformed widget constructors and type validation', () => {
+    const { node } = makeNode()
+
+    const intWidget = ComfyWidgets.INT(
+      node,
+      'value',
+      ['INT', {}] as unknown as InputSpec,
+      {} as never
+    )
+
+    expect(intWidget.widget.name).toBe('INT:value')
+    expect(intWidget.minWidth).toBe(20)
+    expect(intWidget.minHeight).toBe(30)
+    expect(
+      ComfyWidgets.IMAGEUPLOAD(node, 'image', ['IMAGE', {}], {} as never)
+    ).toMatchObject({
+      widget: { name: 'IMAGEUPLOAD:image' },
+      minWidth: 5,
+      minHeight: 6
+    })
+    expect(isValidWidgetType('INT')).toBe(true)
+    expect(isValidWidgetType('DYNAMIC')).toBe(true)
+    expect(isValidWidgetType('missing')).toBe(false)
+  })
+})

src/services/audioService.test.ts

@@ -38,6 +38,12 @@ describe('useAudioService', () => {
     name: 'test-audio-123.wav'
   }
 
+  async function freshService() {
+    vi.resetModules()
+    const audioServiceModule = await import('@/services/audioService')
+    return audioServiceModule.useAudioService()
+  }
+
   beforeEach(() => {
     vi.clearAllMocks()
 
@@ -90,12 +96,41 @@ describe('useAudioService', () => {
       )
       mockRegister.mockRejectedValueOnce(error)
 
-      await service.registerWavEncoder()
+      const isolatedService = await freshService()
+      await isolatedService.registerWavEncoder()
+      await isolatedService.registerWavEncoder()
 
-      expect(mockConnect).toHaveBeenCalledTimes(0)
-      expect(mockRegister).toHaveBeenCalledTimes(0)
+      expect(mockConnect).toHaveBeenCalledTimes(1)
+      expect(mockRegister).toHaveBeenCalledTimes(1)
       expect(console.error).not.toHaveBeenCalled()
     })
+
+    it('should log encoder registration errors', async () => {
+      const error = new Error('Encoder failed')
+      mockRegister.mockRejectedValueOnce(error)
+
+      const isolatedService = await freshService()
+      await isolatedService.registerWavEncoder()
+
+      expect(console.error).toHaveBeenCalledWith(
+        'Audio Service Error (encoder):',
+        'Failed to register WAV encoder',
+        error
+      )
+    })
+
+    it('should log non-Error encoder registration failures', async () => {
+      mockRegister.mockRejectedValueOnce('Encoder failed')
+
+      const isolatedService = await freshService()
+      await isolatedService.registerWavEncoder()
+
+      expect(console.error).toHaveBeenCalledWith(
+        'Audio Service Error (encoder):',
+        'Failed to register WAV encoder',
+        'Encoder failed'
+      )
+    })
   })
 
   describe('stopAllTracks', () => {

src/services/autoQueueService.test.ts

@@ -0,0 +1,118 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { setupAutoQueueHandler } from '@/services/autoQueueService'
+
+type ApiEvent = 'graphChanged'
+type ApiListener = () => void
+type Subscription = () => Promise<void> | void
+
+const {
+  listeners,
+  queueCountStore,
+  queueSettingsStore,
+  appState,
+  addEventListener,
+  isInstantRunningMode
+} = vi.hoisted(() => ({
+  listeners: new Map<ApiEvent, ApiListener>(),
+  queueCountStore: {
+    count: 0,
+    subscription: undefined as Subscription | undefined,
+    $subscribe: vi.fn((_callback: Subscription) => {
+      queueCountStore.subscription = _callback
+    })
+  },
+  queueSettingsStore: {
+    mode: 'manual',
+    batchCount: 1
+  },
+  appState: {
+    lastExecutionError: null as unknown,
+    queuePrompt: vi.fn()
+  },
+  addEventListener: vi.fn((event: ApiEvent, listener: ApiListener) => {
+    listeners.set(event, listener)
+  }),
+  isInstantRunningMode: vi.fn((mode: string) => mode === 'instant')
+}))
+
+vi.mock('@/scripts/api', () => ({
+  api: { addEventListener }
+}))
+
+vi.mock('@/scripts/app', () => ({
+  app: appState
+}))
+
+vi.mock('@/stores/queueStore', () => ({
+  isInstantRunningMode,
+  useQueuePendingTaskCountStore: () => queueCountStore,
+  useQueueSettingsStore: () => queueSettingsStore
+}))
+
+beforeEach(() => {
+  listeners.clear()
+  queueCountStore.count = 0
+  queueCountStore.subscription = undefined
+  queueCountStore.$subscribe.mockClear()
+  queueSettingsStore.mode = 'manual'
+  queueSettingsStore.batchCount = 1
+  appState.lastExecutionError = null
+  appState.queuePrompt.mockReset().mockResolvedValue(undefined)
+  addEventListener.mockClear()
+  isInstantRunningMode
+    .mockClear()
+    .mockImplementation((mode) => mode === 'instant')
+})
+
+describe('setupAutoQueueHandler', () => {
+  it('queues immediately on graph changes when change mode is idle', () => {
+    queueSettingsStore.mode = 'change'
+    queueSettingsStore.batchCount = 3
+
+    setupAutoQueueHandler()
+    listeners.get('graphChanged')?.()
+
+    expect(appState.queuePrompt).toHaveBeenCalledWith(0, 3)
+  })
+
+  it('queues after pending work drains in instant mode', async () => {
+    queueSettingsStore.mode = 'instant'
+    queueSettingsStore.batchCount = 2
+    queueCountStore.count = 0
+
+    setupAutoQueueHandler()
+    await queueCountStore.subscription?.()
+
+    expect(appState.queuePrompt).toHaveBeenCalledWith(0, 2)
+  })
+
+  it('queues after a changed graph drains from an active queue', async () => {
+    queueSettingsStore.mode = 'change'
+    queueCountStore.count = 1
+
+    setupAutoQueueHandler()
+    await queueCountStore.subscription?.()
+    listeners.get('graphChanged')?.()
+    expect(appState.queuePrompt).not.toHaveBeenCalled()
+
+    queueCountStore.count = 0
+    await queueCountStore.subscription?.()
+
+    expect(appState.queuePrompt).toHaveBeenCalledTimes(1)
+  })
+
+  it('does not requeue while work remains or the last run failed', async () => {
+    queueSettingsStore.mode = 'instant'
+    queueCountStore.count = 1
+
+    setupAutoQueueHandler()
+    await queueCountStore.subscription?.()
+
+    appState.lastExecutionError = { message: 'failed' }
+    queueCountStore.count = 0
+    await queueCountStore.subscription?.()
+
+    expect(appState.queuePrompt).not.toHaveBeenCalled()
+  })
+})

src/services/colorPaletteService.test.ts

@@ -0,0 +1,363 @@
+import { fromAny } from '@total-typescript/shoehorn'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { DEFAULT_DARK_COLOR_PALETTE } from '@/constants/coreColorPalettes'
+import {
+  LGraphCanvas,
+  LiteGraph,
+  RenderShape
+} from '@/lib/litegraph/src/litegraph'
+import type { CompletedPalette, Palette } from '@/schemas/colorPaletteSchema'
+
+const mockCanvas = vi.hoisted(() => ({
+  default_connection_color_byType: {} as Record<string, string>,
+  node_title_color: '',
+  default_link_color: '',
+  background_image: '',
+  clear_background_color: '',
+  _pattern: 'pattern' as string | undefined,
+  setDirty: vi.fn()
+}))
+
+const mockColorPaletteStore = vi.hoisted(() => ({
+  customPalettes: {} as Record<string, unknown>,
+  palettesLookup: {} as Record<string, unknown>,
+  completedActivePalette: undefined as unknown,
+  activePaletteId: 'dark',
+  addCustomPalette: vi.fn(),
+  deleteCustomPalette: vi.fn(),
+  completePalette: vi.fn()
+}))
+
+const mockSettingStore = vi.hoisted(() => ({
+  get: vi.fn(),
+  set: vi.fn()
+}))
+
+const mockNodeDefStore = vi.hoisted(() => ({
+  nodeDataTypes: new Set(['IMAGE', 'MISSING'])
+}))
+
+const mockDownloadBlob = vi.hoisted(() => vi.fn())
+const mockUploadFile = vi.hoisted(() => vi.fn())
+
+vi.mock('@/scripts/app', () => ({
+  app: { canvas: mockCanvas }
+}))
+
+vi.mock('@/stores/workspace/colorPaletteStore', () => ({
+  useColorPaletteStore: () => mockColorPaletteStore
+}))
+
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: () => mockSettingStore
+}))
+
+vi.mock('@/stores/nodeDefStore', () => ({
+  useNodeDefStore: () => mockNodeDefStore
+}))
+
+vi.mock('@/base/common/downloadUtil', () => ({
+  downloadBlob: mockDownloadBlob
+}))
+
+vi.mock('@/scripts/utils', () => ({
+  uploadFile: mockUploadFile
+}))
+
+vi.mock('@/composables/useErrorHandling', () => ({
+  useErrorHandling: () => ({
+    wrapWithErrorHandling: <T>(action: T) => action,
+    wrapWithErrorHandlingAsync: <T>(action: T) => action
+  })
+}))
+
+import { useColorPaletteService } from './colorPaletteService'
+
+const validCustomPalette = {
+  id: 'custom',
+  name: 'Custom',
+  colors: {
+    node_slot: {},
+    litegraph_base: {},
+    comfy_base: {}
+  }
+} satisfies Palette
+
+function makeCompletedPalette(id = 'custom'): CompletedPalette {
+  const palette = structuredClone(
+    DEFAULT_DARK_COLOR_PALETTE
+  ) as CompletedPalette
+  palette.id = id
+  palette.name = 'Custom'
+  palette.colors.node_slot.IMAGE = '#123456'
+  palette.colors.litegraph_base.NODE_TITLE_COLOR = '#abcdef'
+  palette.colors.litegraph_base.LINK_COLOR = '#fedcba'
+  palette.colors.litegraph_base.BACKGROUND_IMAGE = 'grid.png'
+  palette.colors.litegraph_base.CLEAR_BACKGROUND_COLOR = '#010203'
+  palette.colors.litegraph_base.NODE_DEFAULT_SHAPE = 'legacy'
+  palette.colors.comfy_base['fg-color'] = '#111111'
+  palette.colors.comfy_base['bg-color'] = '#222222'
+  delete palette.colors.comfy_base['contrast-mix-color']
+  return palette
+}
+
+describe('useColorPaletteService', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockCanvas.default_connection_color_byType = {}
+    mockCanvas.node_title_color = ''
+    mockCanvas.default_link_color = ''
+    mockCanvas.background_image = ''
+    mockCanvas.clear_background_color = ''
+    mockCanvas._pattern = 'pattern'
+    LGraphCanvas.link_type_colors = {}
+    mockSettingStore.get.mockReturnValue('')
+    mockSettingStore.set.mockResolvedValue(undefined)
+    mockColorPaletteStore.customPalettes = { custom: validCustomPalette }
+    mockColorPaletteStore.palettesLookup = { custom: validCustomPalette }
+    mockColorPaletteStore.completedActivePalette = makeCompletedPalette()
+    mockColorPaletteStore.activePaletteId = 'dark'
+    mockColorPaletteStore.completePalette.mockReturnValue(
+      makeCompletedPalette()
+    )
+    document.documentElement.style.cssText = ''
+    document.documentElement.style.setProperty(
+      '--color-datatype-MISSING',
+      '#ffffff'
+    )
+  })
+
+  it('adds valid custom palettes and persists the custom palette map', async () => {
+    const service = useColorPaletteService()
+
+    await service.addCustomColorPalette(validCustomPalette)
+
+    expect(mockColorPaletteStore.addCustomPalette).toHaveBeenCalledWith(
+      validCustomPalette
+    )
+    expect(mockSettingStore.set).toHaveBeenCalledWith(
+      'Comfy.CustomColorPalettes',
+      mockColorPaletteStore.customPalettes
+    )
+  })
+
+  it('rejects invalid custom palettes before mutating the store', async () => {
+    const service = useColorPaletteService()
+
+    await expect(service.addCustomColorPalette({} as Palette)).rejects.toThrow(
+      'Invalid color palette against zod schema'
+    )
+    expect(mockColorPaletteStore.addCustomPalette).not.toHaveBeenCalled()
+  })
+
+  it('deletes custom palettes and persists the custom palette map', async () => {
+    const service = useColorPaletteService()
+
+    await service.deleteCustomColorPalette('custom')
+
+    expect(mockColorPaletteStore.deleteCustomPalette).toHaveBeenCalledWith(
+      'custom'
+    )
+    expect(mockSettingStore.set).toHaveBeenCalledWith(
+      'Comfy.CustomColorPalettes',
+      mockColorPaletteStore.customPalettes
+    )
+  })
+
+  it('loads palette colors into litegraph, Vue CSS variables, and canvas state', async () => {
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => {})
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(mockCanvas.default_connection_color_byType.IMAGE).toBe('#123456')
+    expect(LGraphCanvas.link_type_colors.IMAGE).toBe('#123456')
+    expect(
+      document.documentElement.style.getPropertyValue('--color-datatype-IMAGE')
+    ).toBe('#123456')
+    expect(
+      document.documentElement.style.getPropertyValue(
+        '--color-datatype-MISSING'
+      )
+    ).toBe('')
+    expect(mockCanvas.node_title_color).toBe('#abcdef')
+    expect(mockCanvas.default_link_color).toBe('#fedcba')
+    expect(mockCanvas.background_image).toBe('grid.png')
+    expect(mockCanvas.clear_background_color).toBe('#010203')
+    expect(mockCanvas._pattern).toBeUndefined()
+    expect(LiteGraph.NODE_DEFAULT_SHAPE).toBe(RenderShape.ROUND)
+    expect(warn).toHaveBeenCalledWith(
+      `litegraph_base.NODE_DEFAULT_SHAPE only accepts [${[
+        RenderShape.BOX,
+        RenderShape.ROUND,
+        RenderShape.CARD
+      ].join(', ')}] but got legacy`
+    )
+    expect(document.documentElement.style.getPropertyValue('--fg-color')).toBe(
+      '#111111'
+    )
+    expect(
+      document.documentElement.style.getPropertyValue('--contrast-mix-color')
+    ).toBe('var(--palette-contrast-mix-color)')
+    expect(mockCanvas.setDirty).toHaveBeenCalledWith(true, true)
+    expect(mockColorPaletteStore.activePaletteId).toBe('custom')
+  })
+
+  it('skips absent palette sections while still activating the palette', async () => {
+    const completedPalette = makeCompletedPalette()
+    mockColorPaletteStore.completePalette.mockReturnValue(
+      fromAny<CompletedPalette, unknown>({
+        ...completedPalette,
+        colors: {
+          node_slot: undefined,
+          litegraph_base: completedPalette.colors.litegraph_base,
+          comfy_base: undefined
+        }
+      })
+    )
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(mockCanvas.node_title_color).toBe('#abcdef')
+    expect(mockCanvas.setDirty).toHaveBeenCalledWith(true, true)
+    expect(mockColorPaletteStore.activePaletteId).toBe('custom')
+  })
+
+  it('removes Vue node theme overrides for built-in palettes', async () => {
+    mockColorPaletteStore.palettesLookup = { dark: validCustomPalette }
+    mockColorPaletteStore.completePalette.mockReturnValue(
+      makeCompletedPalette('dark')
+    )
+    document.documentElement.style.setProperty(
+      '--component-node-border',
+      '#ffffff'
+    )
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('dark')
+
+    expect(
+      document.documentElement.style.getPropertyValue('--component-node-border')
+    ).toBe('')
+  })
+
+  it('removes Vue node theme variables when completed palette values are absent', async () => {
+    const completedPalette = makeCompletedPalette()
+    // NODE_BOX_OUTLINE_COLOR is required on the completed palette type; the
+    // test needs it absent, so delete via Reflect to keep the type intact.
+    Reflect.deleteProperty(
+      completedPalette.colors.litegraph_base,
+      'NODE_BOX_OUTLINE_COLOR'
+    )
+    mockColorPaletteStore.completePalette.mockReturnValue(completedPalette)
+    document.documentElement.style.setProperty(
+      '--component-node-border',
+      '#ffffff'
+    )
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(
+      document.documentElement.style.getPropertyValue('--component-node-border')
+    ).toBe('')
+  })
+
+  it('preserves numeric LiteGraph node shapes without warning', async () => {
+    const warn = vi.spyOn(console, 'warn').mockImplementation(() => {})
+    const completedPalette = makeCompletedPalette()
+    completedPalette.colors.litegraph_base.NODE_DEFAULT_SHAPE = RenderShape.CARD
+    mockColorPaletteStore.completePalette.mockReturnValue(completedPalette)
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(LiteGraph.NODE_DEFAULT_SHAPE).toBe(RenderShape.CARD)
+    expect(warn).not.toHaveBeenCalled()
+  })
+
+  it('uses explicit optional comfy color values when present', async () => {
+    const completedPalette = makeCompletedPalette()
+    completedPalette.colors.comfy_base['contrast-mix-color'] = '#333333'
+    mockColorPaletteStore.completePalette.mockReturnValue(completedPalette)
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(
+      document.documentElement.style.getPropertyValue('--contrast-mix-color')
+    ).toBe('#333333')
+  })
+
+  it('uses a white splash background for light themes', async () => {
+    const completedPalette = makeCompletedPalette()
+    completedPalette.light_theme = true
+    mockColorPaletteStore.completePalette.mockReturnValue(completedPalette)
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(localStorage.getItem('comfy-splash-bg')).toBe('#FFFFFF')
+    expect(localStorage.getItem('comfy-splash-fg')).toBe('#111111')
+  })
+
+  it('uses transparent canvas background and bg image CSS when a background image setting exists', async () => {
+    mockSettingStore.get.mockReturnValue('/custom/background.png')
+    const service = useColorPaletteService()
+
+    await service.loadColorPalette('custom')
+
+    expect(mockCanvas.clear_background_color).toBe('transparent')
+    expect(document.documentElement.style.getPropertyValue('--bg-img')).toBe(
+      "url('/custom/background.png')"
+    )
+  })
+
+  it('throws when loading or exporting an unknown palette', async () => {
+    mockColorPaletteStore.palettesLookup = {}
+    const service = useColorPaletteService()
+
+    await expect(service.loadColorPalette('missing')).rejects.toThrow(
+      'Color palette missing not found'
+    )
+    expect(() => service.exportColorPalette('missing')).toThrow(
+      'Color palette missing not found'
+    )
+  })
+
+  it('exports palette JSON by id', async () => {
+    const service = useColorPaletteService()
+
+    service.exportColorPalette('custom')
+
+    expect(mockDownloadBlob).toHaveBeenCalledOnce()
+    const [filename, blob] = mockDownloadBlob.mock.calls[0] as [string, Blob]
+    expect(filename).toBe('custom.json')
+    await expect(blob.text()).resolves.toContain('"id": "custom"')
+  })
+
+  it('imports palette JSON through the custom palette path', async () => {
+    mockUploadFile.mockResolvedValue({
+      text: () => Promise.resolve(JSON.stringify(validCustomPalette))
+    })
+    const service = useColorPaletteService()
+
+    const palette = await service.importColorPalette()
+
+    expect(mockUploadFile).toHaveBeenCalledWith('application/json')
+    expect(palette).toEqual(validCustomPalette)
+    expect(mockColorPaletteStore.addCustomPalette).toHaveBeenCalledWith(
+      validCustomPalette
+    )
+  })
+
+  it('returns the completed active palette from the store', () => {
+    const service = useColorPaletteService()
+
+    expect(service.getActiveColorPalette()).toBe(
+      mockColorPaletteStore.completedActivePalette
+    )
+  })
+})

src/services/dialogService.ts

@@ -18,7 +18,7 @@ import type {
 } from '@/stores/dialogStore'
 
 import type { ComponentAttrs } from 'vue-component-type-helpers'
-import type { SubscriptionDialogReason } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
+import type { SubscriptionDialogOptions } from '@/platform/cloud/subscription/composables/useSubscriptionDialog'
 import type { WorkspaceRole } from '@/platform/workspace/api/workspaceApi'
 
 // Lazy loaders for dialogs - components are loaded on first use
@@ -442,9 +442,9 @@ export const useDialogService = () => {
     })
   }
 
-  async function showSubscriptionRequiredDialog(options?: {
-    reason?: SubscriptionDialogReason
-  }) {
+  async function showSubscriptionRequiredDialog(
+    options?: SubscriptionDialogOptions
+  ) {
     if (!isCloud || !window.__CONFIG__?.subscription_required) {
       return
     }

src/services/extensionService.test.ts

@@ -0,0 +1,324 @@
+import { fromAny } from '@total-typescript/shoehorn'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import type { LGraphNode } from '@/lib/litegraph/src/litegraph'
+import type { AuthUserInfo } from '@/types/authTypes'
+import type { ComfyExtension } from '@/types/comfy'
+import { useExtensionService } from './extensionService'
+
+const mockLoadDisabledExtensionNames = vi.hoisted(() => vi.fn())
+const mockRegisterExtension = vi.hoisted(() => vi.fn())
+const mockCaptureCoreExtensions = vi.hoisted(() => vi.fn())
+const mockEnabledExtensions = vi.hoisted(() => ({
+  value: [] as ComfyExtension[]
+}))
+vi.mock('@/stores/extensionStore', () => ({
+  useExtensionStore: () => ({
+    loadDisabledExtensionNames: mockLoadDisabledExtensionNames,
+    registerExtension: mockRegisterExtension,
+    captureCoreExtensions: mockCaptureCoreExtensions,
+    get enabledExtensions() {
+      return mockEnabledExtensions.value
+    }
+  })
+}))
+
+const mockGetSetting = vi.hoisted(() => vi.fn())
+const mockAddSetting = vi.hoisted(() => vi.fn())
+vi.mock('@/platform/settings/settingStore', () => ({
+  useSettingStore: () => ({
+    get: mockGetSetting,
+    addSetting: mockAddSetting
+  })
+}))
+
+const mockAddDefaultKeybinding = vi.hoisted(() => vi.fn())
+vi.mock('@/platform/keybindings/keybindingStore', () => ({
+  useKeybindingStore: () => ({
+    addDefaultKeybinding: mockAddDefaultKeybinding
+  })
+}))
+
+vi.mock('@/platform/keybindings/keybinding', () => ({
+  KeybindingImpl: class KeybindingImpl {
+    constructor(readonly source: unknown) {}
+  }
+}))
+
+const mockLoadExtensionCommands = vi.hoisted(() => vi.fn())
+vi.mock('@/stores/commandStore', () => ({
+  useCommandStore: () => ({
+    loadExtensionCommands: mockLoadExtensionCommands
+  })
+}))
+
+const mockLoadExtensionMenuCommands = vi.hoisted(() => vi.fn())
+vi.mock('@/stores/menuItemStore', () => ({
+  useMenuItemStore: () => ({
+    loadExtensionMenuCommands: mockLoadExtensionMenuCommands
+  })
+}))
+
+const mockRegisterBottomPanelTabs = vi.hoisted(() => vi.fn())
+vi.mock('@/stores/workspace/bottomPanelStore', () => ({
+  useBottomPanelStore: () => ({
+    registerExtensionBottomPanelTabs: mockRegisterBottomPanelTabs
+  })
+}))
+
+const mockRegisterCustomWidgets = vi.hoisted(() => vi.fn())
+vi.mock('@/stores/widgetStore', () => ({
+  useWidgetStore: () => ({
+    registerCustomWidgets: mockRegisterCustomWidgets
+  })
+}))
+
+const mockToastErrorHandler = vi.hoisted(() => vi.fn())
+vi.mock('@/composables/useErrorHandling', () => ({
+  useErrorHandling: () => ({
+    wrapWithErrorHandling:
+      <Args extends unknown[], Return>(fn: (...args: Args) => Return) =>
+      (...args: Args) =>
+        fn(...args),
+    wrapWithErrorHandlingAsync:
+      <Args extends unknown[], Return>(
+        fn: (...args: Args) => Return | Promise<Return>,
+        handler: (error: unknown) => void
+      ) =>
+      async (...args: Args) => {
+        try {
+          return await fn(...args)
+        } catch (error) {
+          handler(error)
+        }
+      },
+    toastErrorHandler: mockToastErrorHandler
+  })
+}))
+
+const mockUserResolvedCallbacks = vi.hoisted(() => ({
+  values: [] as Array<(user: AuthUserInfo) => void>
+}))
+const mockTokenRefreshedCallbacks = vi.hoisted(() => ({
+  values: [] as Array<() => void>
+}))
+const mockUserLogoutCallbacks = vi.hoisted(() => ({
+  values: [] as Array<() => void>
+}))
+vi.mock('@/composables/auth/useCurrentUser', () => ({
+  useCurrentUser: () => ({
+    onUserResolved: (callback: (user: AuthUserInfo) => void) => {
+      mockUserResolvedCallbacks.values.push(callback)
+    },
+    onTokenRefreshed: (callback: () => void) => {
+      mockTokenRefreshedCallbacks.values.push(callback)
+    },
+    onUserLogout: (callback: () => void) => {
+      mockUserLogoutCallbacks.values.push(callback)
+    }
+  })
+}))
+
+const mockSetCurrentExtension = vi.hoisted(() => vi.fn())
+vi.mock('@/lib/litegraph/src/contextMenuCompat', () => ({
+  legacyMenuCompat: {
+    setCurrentExtension: mockSetCurrentExtension
+  }
+}))
+
+const mockApp = vi.hoisted(() => ({ value: { name: 'app' } }))
+vi.mock('@/scripts/app', () => ({
+  app: mockApp.value
+}))
+
+vi.mock('@/scripts/api', () => ({
+  api: {
+    getExtensions: vi.fn(),
+    fileURL: vi.fn((path: string) => path)
+  }
+}))
+
+describe('useExtensionService', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockEnabledExtensions.value = []
+    mockUserResolvedCallbacks.values = []
+    mockTokenRefreshedCallbacks.values = []
+    mockUserLogoutCallbacks.values = []
+  })
+
+  it('registers extension contributions across stores', async () => {
+    const widgets = { CustomWidget: vi.fn() }
+    const extension = fromAny<ComfyExtension, unknown>({
+      name: 'registration-extension',
+      keybindings: [{ commandId: 'command.one', combo: { key: 'K' } }],
+      commands: [{ id: 'command.one', label: 'Command One' }],
+      menuCommands: [{ path: ['File'], commands: ['command.one'] }],
+      settings: [{ id: 'setting.one', name: 'Setting One' }],
+      bottomPanelTabs: [{ id: 'tab.one', title: 'Tab One' }],
+      getCustomWidgets: vi.fn().mockResolvedValue(widgets)
+    })
+    const service = useExtensionService()
+
+    service.registerExtension(extension)
+
+    expect(mockRegisterExtension).toHaveBeenCalledWith(extension)
+    expect(mockAddDefaultKeybinding).toHaveBeenCalledWith(
+      expect.objectContaining({
+        source: { commandId: 'command.one', combo: { key: 'K' } }
+      })
+    )
+    expect(mockLoadExtensionCommands).toHaveBeenCalledWith(extension)
+    expect(mockLoadExtensionMenuCommands).toHaveBeenCalledWith(extension)
+    expect(mockAddSetting.mock.calls[0][0]).toEqual({
+      id: 'setting.one',
+      name: 'Setting One'
+    })
+    expect(mockRegisterBottomPanelTabs).toHaveBeenCalledWith(extension)
+    await vi.waitFor(() => {
+      expect(mockRegisterCustomWidgets).toHaveBeenCalledWith(widgets)
+    })
+  })
+
+  it('invokes auth lifecycle hooks through registered callbacks', async () => {
+    const onAuthUserResolved = vi.fn()
+    const onAuthTokenRefreshed = vi.fn()
+    const onAuthUserLogout = vi.fn()
+    const extension = fromAny<ComfyExtension, unknown>({
+      name: 'auth-extension',
+      onAuthUserResolved,
+      onAuthTokenRefreshed,
+      onAuthUserLogout
+    })
+    const user = fromAny<AuthUserInfo, unknown>({ id: 'user-1' })
+    const service = useExtensionService()
+
+    service.registerExtension(extension)
+    mockUserResolvedCallbacks.values[0](user)
+    mockTokenRefreshedCallbacks.values[0]()
+    mockUserLogoutCallbacks.values[0]()
+
+    await vi.waitFor(() => {
+      expect(onAuthUserResolved).toHaveBeenCalledWith(user, mockApp.value)
+      expect(onAuthTokenRefreshed).toHaveBeenCalled()
+      expect(onAuthUserLogout).toHaveBeenCalled()
+    })
+  })
+
+  it('reports auth hook errors through the toast handler', async () => {
+    const error = new Error('auth failed')
+    const extension = fromAny<ComfyExtension, unknown>({
+      name: 'failing-auth-extension',
+      onAuthUserResolved: vi.fn(() => {
+        throw error
+      })
+    })
+    const consoleError = vi.spyOn(console, 'error').mockImplementation(() => {})
+    const service = useExtensionService()
+
+    service.registerExtension(extension)
+    mockUserResolvedCallbacks.values[0](
+      fromAny<AuthUserInfo, unknown>({ id: 'user-1' })
+    )
+
+    await vi.waitFor(() => {
+      expect(mockToastErrorHandler).toHaveBeenCalledWith(error)
+    })
+    expect(consoleError).toHaveBeenCalledWith(
+      '[Extension Auth Hook Error]',
+      expect.objectContaining({
+        extension: 'failing-auth-extension',
+        hook: 'onAuthUserResolved',
+        error
+      })
+    )
+    consoleError.mockRestore()
+  })
+
+  it('invokes synchronous extension methods and keeps failures isolated', () => {
+    const getSelectionToolboxCommands = vi.fn(() => ['command.one'])
+    const failingGetSelectionToolboxCommands = vi.fn(() => {
+      throw new Error('menu failed')
+    })
+    const consoleError = vi.spyOn(console, 'error').mockImplementation(() => {})
+    mockEnabledExtensions.value = [
+      fromAny<ComfyExtension, unknown>({
+        name: 'working-extension',
+        getSelectionToolboxCommands
+      }),
+      fromAny<ComfyExtension, unknown>({
+        name: 'non-function-extension',
+        getSelectionToolboxCommands: ['not callable']
+      }),
+      fromAny<ComfyExtension, unknown>({
+        name: 'failing-extension',
+        getSelectionToolboxCommands: failingGetSelectionToolboxCommands
+      }),
+      { name: 'missing-method-extension' }
+    ]
+    const service = useExtensionService()
+
+    const results = service.invokeExtensions(
+      'getSelectionToolboxCommands',
+      fromAny<LGraphNode, unknown>({ id: 1 })
+    )
+
+    expect(results).toEqual([['command.one']])
+    expect(getSelectionToolboxCommands).toHaveBeenCalledWith(
+      fromAny<LGraphNode, unknown>({ id: 1 }),
+      mockApp.value
+    )
+    expect(consoleError).toHaveBeenCalledWith(
+      "Error calling extension 'failing-extension' method 'getSelectionToolboxCommands'",
+      expect.objectContaining({ error: expect.any(Error) }),
+      expect.objectContaining({
+        extension: expect.objectContaining({ name: 'failing-extension' })
+      }),
+      expect.objectContaining({
+        args: [fromAny<LGraphNode, unknown>({ id: 1 })]
+      })
+    )
+    consoleError.mockRestore()
+  })
+
+  it('tracks current extension around async setup callbacks', async () => {
+    const setup = vi.fn().mockResolvedValue('setup-result')
+    const failingSetup = vi.fn().mockRejectedValue(new Error('setup failed'))
+    const consoleError = vi.spyOn(console, 'error').mockImplementation(() => {})
+    mockEnabledExtensions.value = [
+      fromAny<ComfyExtension, unknown>({
+        name: 'setup-extension',
+        setup
+      }),
+      fromAny<ComfyExtension, unknown>({
+        name: 'non-function-extension',
+        setup: true
+      }),
+      fromAny<ComfyExtension, unknown>({
+        name: 'failing-setup-extension',
+        setup: failingSetup
+      }),
+      { name: 'missing-method-extension' }
+    ]
+    const service = useExtensionService()
+
+    const results = await service.invokeExtensionsAsync('setup')
+
+    expect(results).toEqual(['setup-result', undefined, undefined, undefined])
+    expect(mockSetCurrentExtension.mock.calls.map((call) => call[0])).toEqual([
+      'setup-extension',
+      'failing-setup-extension',
+      null,
+      null
+    ])
+    expect(consoleError).toHaveBeenCalledWith(
+      "Error calling extension 'failing-setup-extension' method 'setup'",
+      expect.objectContaining({ error: expect.any(Error) }),
+      expect.objectContaining({
+        extension: expect.objectContaining({ name: 'failing-setup-extension' })
+      }),
+      expect.objectContaining({ args: [] })
+    )
+    consoleError.mockRestore()
+  })
+})