diff --git a/ui/src/views/version/swRegistration.ts b/ui/src/views/version/swRegistration.ts
index 00f78ba..39e7541 100644
--- a/ui/src/views/version/swRegistration.ts
+++ b/ui/src/views/version/swRegistration.ts
@@ -1,7 +1,8 @@
 import { registerSW } from 'virtual:pwa-register'
+import { store } from '@/store'
 
 const ACTIVATION_RETRY_DELAY = 5_000
-const ACTIVATION_TIMEOUT = 30_000
+const ACTIVATION_TIMEOUT = 20_000
 
 let registrationStarted = false
 let activationInProgress = false
@@ -11,10 +12,104 @@ let activateUpdateHandler: ((reloadPage?: boolean) => Promise<void>) | undefined
 let registrationInitialization: Promise<void> | undefined
 let activationRetryTimer: number | undefined
 let activationTimeoutTimer: number | undefined
+let overlayStoreUnsubscribe: (() => void) | undefined
 const watchedInstallingWorkers = new WeakSet<ServiceWorker>()
 
 export type ManualUpdateResult = 'up-to-date' | 'updating' | 'unsupported'
 
+type Release = {
+  version: string
+  changeLog?: string[]
+}
+
+const getText = (value: unknown) =>
+  value === undefined || value === null ? undefined : String(value)
+
+function updateOverlayApiVersion(overlay: HTMLElement) {
+  const apiConfig = store.getState().abpConfig.config?.extraProperties
+  const apiEnvironment = getText(apiConfig?.environment)
+  const apiVersion = getText(apiConfig?.version)
+
+  if (!apiEnvironment && !apiVersion) return false
+
+  const apiValue = overlay.querySelector<HTMLElement>('[data-sw-api-version]')
+  if (apiValue) {
+    apiValue.textContent = `${apiEnvironment ?? '-'}:${apiVersion ?? '-'}`
+  }
+
+  return true
+}
+
+function watchOverlayApiVersion(overlay: HTMLElement) {
+  overlayStoreUnsubscribe?.()
+
+  if (updateOverlayApiVersion(overlay)) return
+
+  overlayStoreUnsubscribe = store.subscribe(() => {
+    if (!overlay.isConnected || updateOverlayApiVersion(overlay)) {
+      overlayStoreUnsubscribe?.()
+      overlayStoreUnsubscribe = undefined
+    }
+  })
+}
+
+async function loadUpdateOverlayDetails(overlay: HTMLElement) {
+  const state = store.getState()
+  const uiEnvironment = import.meta.env.MODE
+
+  let uiVersion = state.locale.currentUiVersion
+  let latestRelease: Release | undefined
+
+  try {
+    const response = await fetch(`/version.json?ts=${Date.now()}`, { cache: 'no-store' })
+    if (!response.ok) throw new Error(`Version request failed with ${response.status}`)
+
+    const releases = ((await response.json()) as { releases?: Release[] }).releases
+    latestRelease = releases?.[0]
+    uiVersion = latestRelease?.version ?? uiVersion
+  } catch (error) {
+    console.warn('Update details could not be loaded.', error)
+  }
+
+  // The overlay may have been removed while version.json was loading.
+  if (!overlay.isConnected) return
+
+  const uiValue = overlay.querySelector<HTMLElement>('[data-sw-ui-version]')
+  const releaseTitle = overlay.querySelector<HTMLElement>('[data-sw-release-title]')
+  const releaseList = overlay.querySelector<HTMLUListElement>('[data-sw-release-list]')
+
+  if (uiValue) uiValue.textContent = `${uiEnvironment}:${uiVersion ?? '-'}`
+  watchOverlayApiVersion(overlay)
+
+  if (!releaseList || !releaseTitle) return
+
+  const changes = latestRelease?.changeLog?.filter(Boolean) ?? []
+  releaseTitle.textContent = latestRelease?.version
+    ? `What's new in v${latestRelease.version}`
+    : "What's new"
+  releaseList.replaceChildren()
+
+  if (changes.length === 0) {
+    const item = document.createElement('li')
+    item.className = 'sw-update-empty'
+    item.textContent = 'Release notes are not available.'
+    releaseList.appendChild(item)
+    return
+  }
+
+  changes.forEach((change) => {
+    const item = document.createElement('li')
+    const icon = document.createElement('span')
+    const text = document.createElement('span')
+    icon.className = 'sw-update-check'
+    icon.setAttribute('aria-hidden', 'true')
+    icon.textContent = '\u2713'
+    text.textContent = change.replace(/^\s*-\s*/, '')
+    item.append(icon, text)
+    releaseList.appendChild(item)
+  })
+}
+
 function showUpdateOverlay() {
   if (document.getElementById('sw-update-overlay')) return
 
@@ -36,13 +131,14 @@ function showUpdateOverlay() {
       display: flex;
       flex-direction: column;
       align-items: center;
-      gap: 20px;
+      gap: 16px;
       background: #fff;
       border-radius: 16px;
-      padding: 40px 56px;
+      padding: 32px 40px;
       box-shadow: 0 8px 40px rgba(0,0,0,0.25);
       text-align: center;
-      max-width: 360px;
+      max-width: 560px;
+      max-height: min(90vh, 720px);
       width: 90%;
     }
     #sw-update-overlay .sw-update-spinner {
@@ -67,22 +163,109 @@ function showUpdateOverlay() {
       color: #6b7280;
       margin: 0;
     }
+    #sw-update-overlay .sw-update-versions {
+      display: flex;
+      flex-wrap: wrap;
+      align-items: center;
+      justify-content: center;
+      gap: 6px;
+      width: 100%;
+      padding: 10px 12px;
+      border-radius: 8px;
+      background: #f3f4f6;
+      color: #4b5563;
+      font-size: 13px;
+      text-transform: capitalize;
+    }
+    #sw-update-overlay .sw-update-separator {
+      color: #9ca3af;
+      margin: 0 4px;
+    }
+    #sw-update-overlay .sw-update-release {
+      width: 100%;
+      min-height: 0;
+      overflow-y: auto;
+      text-align: left;
+      border-top: 1px solid #e5e7eb;
+      padding-top: 14px;
+    }
+    #sw-update-overlay .sw-update-release-title {
+      margin: 0 0 10px;
+      color: #374151;
+      font-size: 14px;
+      font-weight: 700;
+    }
+    #sw-update-overlay .sw-update-list {
+      display: flex;
+      flex-direction: column;
+      gap: 8px;
+      list-style: none;
+      padding: 0;
+      margin: 0;
+      color: #6b7280;
+      font-size: 13px;
+      line-height: 1.45;
+    }
+    #sw-update-overlay .sw-update-list li {
+      display: flex;
+      align-items: flex-start;
+      gap: 8px;
+    }
+    #sw-update-overlay .sw-update-check {
+      display: inline-flex;
+      flex: 0 0 16px;
+      align-items: center;
+      justify-content: center;
+      width: 16px;
+      height: 16px;
+      margin-top: 1px;
+      border-radius: 50%;
+      background: #d1fae5;
+      color: #059669;
+      font-size: 11px;
+      font-weight: 700;
+    }
+    #sw-update-overlay .sw-update-empty {
+      display: block;
+      color: #9ca3af;
+    }
+    @media (max-width: 640px) {
+      #sw-update-overlay .sw-update-card {
+        padding: 24px 20px;
+      }
+    }
   `
   document.head.appendChild(style)
 
   const overlay = document.createElement('div')
   overlay.id = 'sw-update-overlay'
+  overlay.setAttribute('role', 'status')
+  overlay.setAttribute('aria-live', 'polite')
   overlay.innerHTML = `
     <div class="sw-update-card">
       <div class="sw-update-spinner"></div>
-       <p class="sw-update-title">System Updating</p>
+      <p class="sw-update-title">System Updating</p>
       <p class="sw-update-desc">Loading new version, please wait...<br/>The page will reload automatically.</p>
+      <div class="sw-update-versions">
+        <span><strong>UI:</strong> <span data-sw-ui-version>Loading...</span></span>
+        <span class="sw-update-separator">|</span>
+        <span><strong>API:</strong> <span data-sw-api-version>Loading...</span></span>
+      </div>
+      <div class="sw-update-release">
+        <p class="sw-update-release-title" data-sw-release-title>What's new</p>
+        <ul class="sw-update-list" data-sw-release-list>
+          <li class="sw-update-empty">Loading release notes...</li>
+        </ul>
+      </div>
     </div>
   `
   document.body.appendChild(overlay)
+  void loadUpdateOverlayDetails(overlay)
 }
 
 function hideUpdateOverlay() {
+  overlayStoreUnsubscribe?.()
+  overlayStoreUnsubscribe = undefined
   document.getElementById('sw-update-overlay')?.remove()
   document.getElementById('sw-update-overlay-style')?.remove()
 }