diff --git a/src/composables/billing/useWorkspaceBilling.ts b/src/composables/billing/useWorkspaceBilling.ts
index def368e17..368e80277 100644
--- a/src/composables/billing/useWorkspaceBilling.ts
+++ b/src/composables/billing/useWorkspaceBilling.ts
@@ -47,7 +47,7 @@ export function useWorkspaceBilling(): BillingState & BillingActions {
       tier: status.subscription_tier ?? null,
       duration: status.subscription_duration ?? null,
       planSlug: status.plan_slug ?? null,
-      renewalDate: null, // Workspace billing uses cancel_at for end date
+      renewalDate: status.renewal_date ?? null,
       endDate: status.cancel_at ?? null,
       isCancelled: status.subscription_status === 'canceled',
       hasFunds: status.has_funds
diff --git a/src/composables/queue/useJobList.test.ts b/src/composables/queue/useJobList.test.ts
index 0aaaa892c..684ffa636 100644
--- a/src/composables/queue/useJobList.test.ts
+++ b/src/composables/queue/useJobList.test.ts
@@ -134,6 +134,25 @@ vi.mock('@/stores/executionStore', () => ({
   }
 }))
 
+let jobPreviewStoreMock: {
+  previewsByPromptId: Record<string, string>
+  isPreviewEnabled: boolean
+}
+const ensureJobPreviewStore = () => {
+  if (!jobPreviewStoreMock) {
+    jobPreviewStoreMock = reactive({
+      previewsByPromptId: {} as Record<string, string>,
+      isPreviewEnabled: true
+    })
+  }
+  return jobPreviewStoreMock
+}
+vi.mock('@/stores/jobPreviewStore', () => ({
+  useJobPreviewStore: () => {
+    return ensureJobPreviewStore()
+  }
+}))
+
 let workflowStoreMock: {
   activeWorkflow: null | { activeState?: { id?: string } }
 }
@@ -186,6 +205,10 @@ const resetStores = () => {
   executionStore.activePromptId = null
   executionStore.executingNode = null
 
+  const jobPreviewStore = ensureJobPreviewStore()
+  jobPreviewStore.previewsByPromptId = {}
+  jobPreviewStore.isPreviewEnabled = true
+
   const workflowStore = ensureWorkflowStore()
   workflowStore.activeWorkflow = null
 
@@ -437,6 +460,44 @@ describe('useJobList', () => {
     expect(otherJob.computeHours).toBeCloseTo(1)
   })
 
+  it('assigns preview urls for running jobs when previews enabled', async () => {
+    queueStoreMock.runningTasks = [
+      createTask({
+        promptId: 'live-preview',
+        queueIndex: 1,
+        mockState: 'running'
+      })
+    ]
+    jobPreviewStoreMock.previewsByPromptId = {
+      'live-preview': 'blob:preview-url'
+    }
+    jobPreviewStoreMock.isPreviewEnabled = true
+
+    const { jobItems } = initComposable()
+    await flush()
+
+    expect(jobItems.value[0].iconImageUrl).toBe('blob:preview-url')
+  })
+
+  it('omits preview urls when previews are disabled', async () => {
+    queueStoreMock.runningTasks = [
+      createTask({
+        promptId: 'disabled-preview',
+        queueIndex: 1,
+        mockState: 'running'
+      })
+    ]
+    jobPreviewStoreMock.previewsByPromptId = {
+      'disabled-preview': 'blob:preview-url'
+    }
+    jobPreviewStoreMock.isPreviewEnabled = false
+
+    const { jobItems } = initComposable()
+    await flush()
+
+    expect(jobItems.value[0].iconImageUrl).toBeUndefined()
+  })
+
   it('derives current node name from execution store fallbacks', async () => {
     const instance = initComposable()
     await flush()
diff --git a/src/composables/queue/useJobList.ts b/src/composables/queue/useJobList.ts
index 715778adb..8eda4fca5 100644
--- a/src/composables/queue/useJobList.ts
+++ b/src/composables/queue/useJobList.ts
@@ -7,6 +7,7 @@ import { st } from '@/i18n'
 import { isCloud } from '@/platform/distribution/types'
 import { useWorkflowStore } from '@/platform/workflow/management/stores/workflowStore'
 import { useExecutionStore } from '@/stores/executionStore'
+import { useJobPreviewStore } from '@/stores/jobPreviewStore'
 import { useQueueStore } from '@/stores/queueStore'
 import type { TaskItemImpl } from '@/stores/queueStore'
 import type { JobState } from '@/types/queue'
@@ -96,6 +97,7 @@ export function useJobList() {
   const { t, locale } = useI18n()
   const queueStore = useQueueStore()
   const executionStore = useExecutionStore()
+  const jobPreviewStore = useJobPreviewStore()
   const workflowStore = useWorkflowStore()
 
   const seenPendingIds = ref<Set<string>>(new Set())
@@ -256,6 +258,11 @@ export function useJobList() {
         String(task.promptId ?? '') ===
         String(executionStore.activePromptId ?? '')
       const showAddedHint = shouldShowAddedHint(task, state)
+      const promptKey = taskIdToKey(task.promptId)
+      const promptPreviewUrl =
+        state === 'running' && jobPreviewStore.isPreviewEnabled && promptKey
+          ? jobPreviewStore.previewsByPromptId[promptKey]
+          : undefined
 
       const display = buildJobDisplay(task, state, {
         t,
@@ -275,7 +282,7 @@ export function useJobList() {
         meta: display.secondary,
         state,
         iconName: display.iconName,
-        iconImageUrl: display.iconImageUrl,
+        iconImageUrl: promptPreviewUrl ?? display.iconImageUrl,
         showClear: display.showClear,
         taskRef: task,
         progressTotalPercent:
diff --git a/src/platform/cloud/subscription/components/PricingTable.test.ts b/src/platform/cloud/subscription/components/PricingTable.test.ts
index f7ac0aecd..1d24c7d13 100644
--- a/src/platform/cloud/subscription/components/PricingTable.test.ts
+++ b/src/platform/cloud/subscription/components/PricingTable.test.ts
@@ -1,7 +1,7 @@
 import { createTestingPinia } from '@pinia/testing'
 import { flushPromises, mount } from '@vue/test-utils'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import { computed, ref } from 'vue'
+import { computed, reactive, ref } from 'vue'
 import { createI18n } from 'vue-i18n'
 
 import PricingTable from '@/platform/cloud/subscription/components/PricingTable.vue'
@@ -15,6 +15,7 @@ const mockIsYearlySubscription = ref(false)
 const mockAccessBillingPortal = vi.fn()
 const mockReportError = vi.fn()
 const mockTrackBeginCheckout = vi.fn()
+const mockUserId = ref<string | undefined>('user-123')
 const mockGetFirebaseAuthHeader = vi.fn(() =>
   Promise.resolve({ Authorization: 'Bearer test-token' })
 )
@@ -55,10 +56,11 @@ vi.mock('@/composables/useErrorHandling', () => ({
 }))
 
 vi.mock('@/stores/firebaseAuthStore', () => ({
-  useFirebaseAuthStore: () => ({
-    getFirebaseAuthHeader: mockGetFirebaseAuthHeader,
-    userId: 'user-123'
-  }),
+  useFirebaseAuthStore: () =>
+    reactive({
+      getFirebaseAuthHeader: mockGetFirebaseAuthHeader,
+      userId: computed(() => mockUserId.value)
+    }),
   FirebaseAuthStoreError: class extends Error {}
 }))
 
@@ -151,6 +153,7 @@ describe('PricingTable', () => {
     mockIsActiveSubscription.value = false
     mockSubscriptionTier.value = null
     mockIsYearlySubscription.value = false
+    mockUserId.value = 'user-123'
     mockTrackBeginCheckout.mockReset()
     vi.mocked(global.fetch).mockResolvedValue({
       ok: true,
@@ -201,6 +204,33 @@ describe('PricingTable', () => {
       expect(mockAccessBillingPortal).toHaveBeenCalledWith('pro-yearly')
     })
 
+    it('should use the latest userId value when it changes after mount', async () => {
+      mockIsActiveSubscription.value = true
+      mockSubscriptionTier.value = 'STANDARD'
+      mockUserId.value = 'user-early'
+
+      const wrapper = createWrapper()
+      await flushPromises()
+
+      mockUserId.value = 'user-late'
+
+      const creatorButton = wrapper
+        .findAll('button')
+        .find((btn) => btn.text().includes('Creator'))
+
+      await creatorButton?.trigger('click')
+      await flushPromises()
+
+      expect(mockTrackBeginCheckout).toHaveBeenCalledTimes(1)
+      expect(mockTrackBeginCheckout).toHaveBeenCalledWith({
+        user_id: 'user-late',
+        tier: 'creator',
+        cycle: 'yearly',
+        checkout_type: 'change',
+        previous_tier: 'standard'
+      })
+    })
+
     it('should not call accessBillingPortal when clicking current plan', async () => {
       mockIsActiveSubscription.value = true
       mockSubscriptionTier.value = 'CREATOR'
diff --git a/src/platform/cloud/subscription/components/PricingTable.vue b/src/platform/cloud/subscription/components/PricingTable.vue
index 0e4df0a81..3e4e8a17d 100644
--- a/src/platform/cloud/subscription/components/PricingTable.vue
+++ b/src/platform/cloud/subscription/components/PricingTable.vue
@@ -243,6 +243,7 @@
 
 <script setup lang="ts">
 import { cn } from '@comfyorg/tailwind-utils'
+import { storeToRefs } from 'pinia'
 import Popover from 'primevue/popover'
 import SelectButton from 'primevue/selectbutton'
 import type { ToggleButtonPassThroughMethodOptions } from 'primevue/togglebutton'
@@ -333,7 +334,7 @@ const tiers: PricingTierConfig[] = [
 const { isActiveSubscription, subscriptionTier, isYearlySubscription } =
   useSubscription()
 const telemetry = useTelemetry()
-const { userId } = useFirebaseAuthStore()
+const { userId } = storeToRefs(useFirebaseAuthStore())
 const { accessBillingPortal, reportError } = useFirebaseAuthActions()
 const { wrapWithErrorHandlingAsync } = useErrorHandling()
 
@@ -415,9 +416,9 @@ const handleSubscribe = wrapWithErrorHandlingAsync(
     try {
       if (isActiveSubscription.value) {
         const checkoutAttribution = getCheckoutAttribution()
-        if (userId) {
+        if (userId.value) {
           telemetry?.trackBeginCheckout({
-            user_id: userId,
+            user_id: userId.value,
             tier: tierKey,
             cycle: currentBillingCycle.value,
             checkout_type: 'change',
diff --git a/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.test.ts b/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.test.ts
index 355e230ce..2f1d3ea87 100644
--- a/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.test.ts
+++ b/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.test.ts
@@ -1,4 +1,5 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { computed, reactive } from 'vue'
 
 import { performSubscriptionCheckout } from './subscriptionCheckoutUtil'
 
@@ -15,7 +16,7 @@ const {
   mockGetAuthHeader: vi.fn(() =>
     Promise.resolve({ Authorization: 'Bearer test-token' })
   ),
-  mockUserId: { value: 'user-123' },
+  mockUserId: { value: 'user-123' as string | undefined },
   mockIsCloud: { value: true },
   mockGetCheckoutAttribution: vi.fn(() => ({
     ga_client_id: 'ga-client-id',
@@ -32,12 +33,12 @@ vi.mock('@/platform/telemetry', () => ({
 }))
 
 vi.mock('@/stores/firebaseAuthStore', () => ({
-  useFirebaseAuthStore: vi.fn(() => ({
-    getFirebaseAuthHeader: mockGetAuthHeader,
-    get userId() {
-      return mockUserId.value
-    }
-  })),
+  useFirebaseAuthStore: vi.fn(() =>
+    reactive({
+      getFirebaseAuthHeader: mockGetAuthHeader,
+      userId: computed(() => mockUserId.value)
+    })
+  ),
   FirebaseAuthStoreError: class extends Error {}
 }))
 
@@ -53,6 +54,15 @@ vi.mock('@/platform/telemetry/utils/checkoutAttribution', () => ({
 
 global.fetch = vi.fn()
 
+function createDeferred<T>() {
+  let resolve: (value: T) => void = () => {}
+  const promise = new Promise<T>((res) => {
+    resolve = res
+  })
+
+  return { promise, resolve }
+}
+
 describe('performSubscriptionCheckout', () => {
   beforeEach(() => {
     vi.clearAllMocks()
@@ -105,4 +115,35 @@ describe('performSubscriptionCheckout', () => {
     )
     expect(openSpy).toHaveBeenCalledWith(checkoutUrl, '_blank')
   })
+
+  it('uses the latest userId when it changes after checkout starts', async () => {
+    const checkoutUrl = 'https://checkout.stripe.com/test'
+    const openSpy = vi.spyOn(window, 'open').mockImplementation(() => null)
+    const authHeader = createDeferred<{ Authorization: string }>()
+
+    mockUserId.value = 'user-early'
+    mockGetAuthHeader.mockImplementationOnce(() => authHeader.promise)
+    vi.mocked(global.fetch).mockResolvedValue({
+      ok: true,
+      json: async () => ({ checkout_url: checkoutUrl })
+    } as Response)
+
+    const checkoutPromise = performSubscriptionCheckout('pro', 'yearly', true)
+
+    mockUserId.value = 'user-late'
+    authHeader.resolve({ Authorization: 'Bearer test-token' })
+
+    await checkoutPromise
+
+    expect(mockTelemetry.trackBeginCheckout).toHaveBeenCalledTimes(1)
+    expect(mockTelemetry.trackBeginCheckout).toHaveBeenCalledWith(
+      expect.objectContaining({
+        user_id: 'user-late',
+        tier: 'pro',
+        cycle: 'yearly',
+        checkout_type: 'new'
+      })
+    )
+    expect(openSpy).toHaveBeenCalledWith(checkoutUrl, '_blank')
+  })
 })
diff --git a/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.ts b/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.ts
index b50d827f7..9cb2ad33e 100644
--- a/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.ts
+++ b/src/platform/cloud/subscription/utils/subscriptionCheckoutUtil.ts
@@ -1,3 +1,5 @@
+import { storeToRefs } from 'pinia'
+
 import { getComfyApiBaseUrl } from '@/config/comfyApi'
 import { t } from '@/i18n'
 import { isCloud } from '@/platform/distribution/types'
@@ -37,9 +39,10 @@ export async function performSubscriptionCheckout(
 ): Promise<void> {
   if (!isCloud) return
 
-  const { getFirebaseAuthHeader, userId } = useFirebaseAuthStore()
+  const firebaseAuthStore = useFirebaseAuthStore()
+  const { userId } = storeToRefs(firebaseAuthStore)
   const telemetry = useTelemetry()
-  const authHeader = await getFirebaseAuthHeader()
+  const authHeader = await firebaseAuthStore.getFirebaseAuthHeader()
 
   if (!authHeader) {
     throw new FirebaseAuthStoreError(t('toastMessages.userNotAuthenticated'))
@@ -84,9 +87,9 @@ export async function performSubscriptionCheckout(
   const data = await response.json()
 
   if (data.checkout_url) {
-    if (userId) {
+    if (userId.value) {
       telemetry?.trackBeginCheckout({
-        user_id: userId,
+        user_id: userId.value,
         tier: tierKey,
         cycle: currentBillingCycle,
         checkout_type: 'new',
diff --git a/src/platform/workspace/api/workspaceApi.ts b/src/platform/workspace/api/workspaceApi.ts
index 624d6d118..caf07db40 100644
--- a/src/platform/workspace/api/workspaceApi.ts
+++ b/src/platform/workspace/api/workspaceApi.ts
@@ -211,6 +211,7 @@ export interface BillingStatusResponse {
   billing_status?: BillingStatus
   has_funds: boolean
   cancel_at?: string
+  renewal_date?: string
 }
 
 export interface BillingBalanceResponse {
diff --git a/src/scripts/app.ts b/src/scripts/app.ts
index f40acf3a1..e750d24ad 100644
--- a/src/scripts/app.ts
+++ b/src/scripts/app.ts
@@ -61,6 +61,7 @@ import { useExecutionStore } from '@/stores/executionStore'
 import { useExtensionStore } from '@/stores/extensionStore'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
 import { useNodeOutputStore } from '@/stores/imagePreviewStore'
+import { useJobPreviewStore } from '@/stores/jobPreviewStore'
 import { KeyComboImpl } from '@/platform/keybindings/keyCombo'
 import { useKeybindingStore } from '@/platform/keybindings/keybindingStore'
 import { useModelStore } from '@/stores/modelStore'
@@ -86,6 +87,10 @@ import {
   fixLinkInputSlots,
   isImageNode
 } from '@/utils/litegraphUtil'
+import {
+  createSharedObjectUrl,
+  releaseSharedObjectUrl
+} from '@/utils/objectUrlUtil'
 import {
   findLegacyRerouteNodes,
   noNativeReroutes
@@ -701,12 +706,13 @@ export class ComfyApp {
 
     api.addEventListener('b_preview_with_metadata', ({ detail }) => {
       // Enhanced preview with explicit node context
-      const { blob, displayNodeId } = detail
+      const { blob, displayNodeId, promptId } = detail
       const { setNodePreviewsByExecutionId, revokePreviewsByExecutionId } =
         useNodeOutputStore()
+      const blobUrl = createSharedObjectUrl(blob)
+      useJobPreviewStore().setPreviewUrl(promptId, blobUrl)
       // Ensure clean up if `executing` event is missed.
       revokePreviewsByExecutionId(displayNodeId)
-      const blobUrl = URL.createObjectURL(blob)
       // Preview cleanup is handled in progress_state event to support multiple concurrent previews
       const nodeParents = displayNodeId.split(':')
       for (let i = 1; i <= nodeParents.length; i++) {
@@ -714,6 +720,7 @@ export class ComfyApp {
           blobUrl
         ])
       }
+      releaseSharedObjectUrl(blobUrl)
     })
 
     api.init()
diff --git a/src/stores/executionStore.ts b/src/stores/executionStore.ts
index dda732af5..c3d4b3315 100644
--- a/src/stores/executionStore.ts
+++ b/src/stores/executionStore.ts
@@ -30,6 +30,7 @@ import type {
 import { api } from '@/scripts/api'
 import { app } from '@/scripts/app'
 import { useNodeOutputStore } from '@/stores/imagePreviewStore'
+import { useJobPreviewStore } from '@/stores/jobPreviewStore'
 import type { NodeLocatorId } from '@/types/nodeIdentification'
 import { createNodeLocatorId } from '@/types/nodeIdentification'
 import { forEachNode, getNodeByExecutionId } from '@/utils/graphTraversalUtil'
@@ -454,6 +455,7 @@ export const useExecutionStore = defineStore('execution', () => {
       const map = { ...nodeProgressStatesByPrompt.value }
       delete map[promptId]
       nodeProgressStatesByPrompt.value = map
+      useJobPreviewStore().clearPreview(promptId)
     }
     if (activePromptId.value) {
       delete queuedPrompts.value[activePromptId.value]
diff --git a/src/stores/imagePreviewStore.ts b/src/stores/imagePreviewStore.ts
index 2dd13407c..95c56a521 100644
--- a/src/stores/imagePreviewStore.ts
+++ b/src/stores/imagePreviewStore.ts
@@ -15,6 +15,10 @@ import { useExecutionStore } from '@/stores/executionStore'
 import type { NodeLocatorId } from '@/types/nodeIdentification'
 import { parseFilePath } from '@/utils/formatUtil'
 import { isVideoNode } from '@/utils/litegraphUtil'
+import {
+  releaseSharedObjectUrl,
+  retainSharedObjectUrl
+} from '@/utils/objectUrlUtil'
 
 const PREVIEW_REVOKE_DELAY_MS = 400
 
@@ -216,10 +220,19 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
   ) {
     const nodeLocatorId = executionIdToNodeLocatorId(executionId)
     if (!nodeLocatorId) return
+    const existingPreviews = app.nodePreviewImages[nodeLocatorId]
     if (scheduledRevoke[nodeLocatorId]) {
       scheduledRevoke[nodeLocatorId].stop()
       delete scheduledRevoke[nodeLocatorId]
     }
+    if (existingPreviews?.[Symbol.iterator]) {
+      for (const url of existingPreviews) {
+        releaseSharedObjectUrl(url)
+      }
+    }
+    for (const url of previewImages) {
+      retainSharedObjectUrl(url)
+    }
     latestPreview.value = previewImages
     app.nodePreviewImages[nodeLocatorId] = previewImages
     nodePreviewImages.value[nodeLocatorId] = previewImages
@@ -237,10 +250,19 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
     previewImages: string[]
   ) {
     const nodeLocatorId = nodeIdToNodeLocatorId(nodeId)
+    const existingPreviews = app.nodePreviewImages[nodeLocatorId]
     if (scheduledRevoke[nodeLocatorId]) {
       scheduledRevoke[nodeLocatorId].stop()
       delete scheduledRevoke[nodeLocatorId]
     }
+    if (existingPreviews?.[Symbol.iterator]) {
+      for (const url of existingPreviews) {
+        releaseSharedObjectUrl(url)
+      }
+    }
+    for (const url of previewImages) {
+      retainSharedObjectUrl(url)
+    }
     app.nodePreviewImages[nodeLocatorId] = previewImages
     nodePreviewImages.value[nodeLocatorId] = previewImages
   }
@@ -270,7 +292,7 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
     if (!previews?.[Symbol.iterator]) return
 
     for (const url of previews) {
-      URL.revokeObjectURL(url)
+      releaseSharedObjectUrl(url)
     }
 
     delete app.nodePreviewImages[nodeLocatorId]
@@ -287,7 +309,7 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
       if (!previews?.[Symbol.iterator]) continue
 
       for (const url of previews) {
-        URL.revokeObjectURL(url)
+        releaseSharedObjectUrl(url)
       }
     }
     app.nodePreviewImages = {}
@@ -326,6 +348,12 @@ export const useNodeOutputStore = defineStore('nodeOutput', () => {
 
     // Clear preview images
     if (app.nodePreviewImages[nodeLocatorId]) {
+      const previews = app.nodePreviewImages[nodeLocatorId]
+      if (previews?.[Symbol.iterator]) {
+        for (const url of previews) {
+          releaseSharedObjectUrl(url)
+        }
+      }
       delete app.nodePreviewImages[nodeLocatorId]
       delete nodePreviewImages.value[nodeLocatorId]
     }
diff --git a/src/stores/jobPreviewStore.ts b/src/stores/jobPreviewStore.ts
new file mode 100644
index 000000000..ce0b83a64
--- /dev/null
+++ b/src/stores/jobPreviewStore.ts
@@ -0,0 +1,62 @@
+import { defineStore } from 'pinia'
+import { computed, readonly, ref, watch } from 'vue'
+
+import { useSettingStore } from '@/platform/settings/settingStore'
+import {
+  releaseSharedObjectUrl,
+  retainSharedObjectUrl
+} from '@/utils/objectUrlUtil'
+
+type PromptPreviewMap = Record<string, string>
+
+export const useJobPreviewStore = defineStore('jobPreview', () => {
+  const settingStore = useSettingStore()
+  const previewsByPromptId = ref<PromptPreviewMap>({})
+  const readonlyPreviewsByPromptId = readonly(previewsByPromptId)
+
+  const previewMethod = computed(() =>
+    settingStore.get('Comfy.Execution.PreviewMethod')
+  )
+  const isPreviewEnabled = computed(() => previewMethod.value !== 'none')
+
+  function setPreviewUrl(promptId: string | undefined, url: string) {
+    if (!promptId || !isPreviewEnabled.value) return
+    const current = previewsByPromptId.value[promptId]
+    if (current === url) return
+    if (current) releaseSharedObjectUrl(current)
+    retainSharedObjectUrl(url)
+    previewsByPromptId.value = {
+      ...previewsByPromptId.value,
+      [promptId]: url
+    }
+  }
+
+  function clearPreview(promptId: string | undefined) {
+    if (!promptId) return
+    const current = previewsByPromptId.value[promptId]
+    if (!current) return
+    releaseSharedObjectUrl(current)
+    const next = { ...previewsByPromptId.value }
+    delete next[promptId]
+    previewsByPromptId.value = next
+  }
+
+  function clearAllPreviews() {
+    Object.values(previewsByPromptId.value).forEach((url) => {
+      releaseSharedObjectUrl(url)
+    })
+    previewsByPromptId.value = {}
+  }
+
+  watch(isPreviewEnabled, (enabled) => {
+    if (!enabled) clearAllPreviews()
+  })
+
+  return {
+    previewsByPromptId: readonlyPreviewsByPromptId,
+    isPreviewEnabled,
+    setPreviewUrl,
+    clearPreview,
+    clearAllPreviews
+  }
+})
diff --git a/src/utils/objectUrlUtil.ts b/src/utils/objectUrlUtil.ts
new file mode 100644
index 000000000..b934997ae
--- /dev/null
+++ b/src/utils/objectUrlUtil.ts
@@ -0,0 +1,27 @@
+const objectUrlRefCounts = new Map<string, number>()
+
+const isBlobUrl = (url: string) => url.startsWith('blob:')
+
+export function createSharedObjectUrl(blob: Blob): string {
+  const url = URL.createObjectURL(blob)
+  objectUrlRefCounts.set(url, 1)
+  return url
+}
+
+export function retainSharedObjectUrl(url: string | undefined): void {
+  if (!url || !isBlobUrl(url)) return
+  objectUrlRefCounts.set(url, (objectUrlRefCounts.get(url) ?? 0) + 1)
+}
+
+export function releaseSharedObjectUrl(url: string | undefined): void {
+  if (!url || !isBlobUrl(url)) return
+
+  const currentCount = objectUrlRefCounts.get(url)
+  if (currentCount === undefined || currentCount <= 1) {
+    objectUrlRefCounts.delete(url)
+    URL.revokeObjectURL(url)
+    return
+  }
+
+  objectUrlRefCounts.set(url, currentCount - 1)
+}