diff --git a/packages/ui/src/components/update/OpenCodeUpdateToast.tsx b/packages/ui/src/components/update/OpenCodeUpdateToast.tsx
index 116be1a4..9c7fe1a3 100644
--- a/packages/ui/src/components/update/OpenCodeUpdateToast.tsx
+++ b/packages/ui/src/components/update/OpenCodeUpdateToast.tsx
@@ -4,17 +4,19 @@ import { toast } from '@/components/ui/toast';
 import { reloadOpenCodeConfiguration } from '@/stores/useAgentsStore';
 import { useUIStore } from '@/stores/useUIStore';
 import { useI18n } from '@/lib/i18n';
-
-type OpenCodeUpdateAvailableEvent = CustomEvent<{ version?: unknown }>;
-type OpenCodeUpgradeStatus = {
-  available?: boolean | null;
-  latestVersion?: string | null;
-};
+import { getSafeStorage } from '@/stores/utils/safeStorage';
+import {
+  resolveOpenCodeUpdateVersion,
+  resolveOpenCodeUpgradeStatusVersion,
+  shouldShowOpenCodeUpdateToast,
+  type OpenCodeUpgradeStatusLike,
+} from './openCodeUpdateDedup';
 
 const UPDATE_TOAST_ID = 'opencode-update-available';
 const UPGRADE_TOAST_ID = 'opencode-upgrade-progress';
 const INITIAL_CHECK_DELAY_MS = 5_000;
 const CHECK_RETRY_DELAYS_MS = [10_000, 60_000];
+const UPDATE_TOAST_DISMISSED_VERSION_KEY = 'opencode-update-toast-dismissed-version';
 
 export const OpenCodeUpdateToast: React.FC = () => {
   const { t } = useI18n();
@@ -87,14 +89,19 @@ export const OpenCodeUpdateToast: React.FC = () => {
 
   React.useEffect(() => {
     const showUpdateAvailableToast = (version: string) => {
+      // Upstream setting wins over our dedup logic: if user disabled
+      // OpenCode update notifications, dismiss any active toast and bail
+      // before consulting dedup state.
       if (!useUIStore.getState().showOpenCodeUpdateNotifications) {
         toast.dismiss(UPDATE_TOAST_ID);
         return;
       }
-      if (!version) {
-        return;
-      }
-      if (seenVersionsRef.current.has(version)) {
+      const decision = shouldShowOpenCodeUpdateToast({
+        version,
+        dismissedVersion: getSafeStorage().getItem(UPDATE_TOAST_DISMISSED_VERSION_KEY),
+        seenVersions: seenVersionsRef.current,
+      });
+      if (!decision) {
         return;
       }
       seenVersionsRef.current.add(version);
@@ -107,13 +114,18 @@ export const OpenCodeUpdateToast: React.FC = () => {
           label: t('opencodeUpdate.toast.actions.update'),
           onClick: runUpgrade,
         },
+        cancel: {
+          label: t('opencodeUpdate.toast.actions.dismiss'),
+          onClick: () => {
+            getSafeStorage().setItem(UPDATE_TOAST_DISMISSED_VERSION_KEY, version);
+            toast.dismiss(UPDATE_TOAST_ID);
+          },
+        },
       });
     };
 
     const onUpdateAvailable = (event: Event) => {
-      const version = typeof (event as OpenCodeUpdateAvailableEvent).detail?.version === 'string'
-        ? String((event as OpenCodeUpdateAvailableEvent).detail.version).trim()
-        : '';
+      const version = resolveOpenCodeUpdateVersion((event as CustomEvent<unknown>).detail);
       showUpdateAvailableToast(version);
     };
 
@@ -124,9 +136,9 @@ export const OpenCodeUpdateToast: React.FC = () => {
       try {
         const response = await fetch('/api/opencode/upgrade-status', { headers: { Accept: 'application/json' } });
         if (!response.ok) throw new Error(response.statusText || 'OpenCode upgrade status check failed');
-        const status = await response.json().catch(() => null) as OpenCodeUpgradeStatus | null;
-        const version = typeof status?.latestVersion === 'string' ? status.latestVersion.trim() : '';
-        if (!cancelled && status?.available === true && version) {
+        const status = await response.json().catch(() => null) as OpenCodeUpgradeStatusLike | null;
+        const version = resolveOpenCodeUpgradeStatusVersion(status);
+        if (!cancelled && version) {
           showUpdateAvailableToast(version);
         }
       } catch {
diff --git a/packages/ui/src/components/update/__tests__/openCodeUpdateDedup.test.ts b/packages/ui/src/components/update/__tests__/openCodeUpdateDedup.test.ts
new file mode 100644
index 00000000..64d8bf42
--- /dev/null
+++ b/packages/ui/src/components/update/__tests__/openCodeUpdateDedup.test.ts
@@ -0,0 +1,240 @@
+import { describe, test, expect } from 'bun:test';
+
+import {
+    resolveOpenCodeUpdateVersion,
+    resolveOpenCodeUpgradeStatusVersion,
+    shouldShowOpenCodeUpdateToast,
+    shouldShowPwaInstallToast,
+} from '../openCodeUpdateDedup';
+
+describe('shouldShowPwaInstallToast', () => {
+    test('returns true when nothing blocks the toast', () => {
+        expect(
+            shouldShowPwaInstallToast({
+                dismissed: null,
+                sessionShown: null,
+                hasActiveToast: false,
+            }),
+        ).toBe(true);
+    });
+
+    test('returns false when persistent dismissal is set', () => {
+        expect(
+            shouldShowPwaInstallToast({
+                dismissed: 'true',
+                sessionShown: null,
+                hasActiveToast: false,
+            }),
+        ).toBe(false);
+    });
+
+    test('returns false when the toast was already shown in this session', () => {
+        expect(
+            shouldShowPwaInstallToast({
+                dismissed: null,
+                sessionShown: 'true',
+                hasActiveToast: false,
+            }),
+        ).toBe(false);
+    });
+
+    test('returns false when the effect already owns an active toast', () => {
+        expect(
+            shouldShowPwaInstallToast({
+                dismissed: null,
+                sessionShown: null,
+                hasActiveToast: true,
+            }),
+        ).toBe(false);
+    });
+
+    test('treats non-"true" storage values as unset', () => {
+        expect(
+            shouldShowPwaInstallToast({
+                dismissed: 'false',
+                sessionShown: '0',
+                hasActiveToast: false,
+            }),
+        ).toBe(true);
+    });
+
+    test('persistent dismissal wins even when session marker is also set', () => {
+        expect(
+            shouldShowPwaInstallToast({
+                dismissed: 'true',
+                sessionShown: 'true',
+                hasActiveToast: false,
+            }),
+        ).toBe(false);
+    });
+});
+
+describe('shouldShowOpenCodeUpdateToast', () => {
+    test('returns true for a fresh version with no dismissal and an empty seen set', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '1.16.0',
+                dismissedVersion: null,
+                seenVersions: new Set(),
+            }),
+        ).toBe(true);
+    });
+
+    test('returns false for an empty version string', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '',
+                dismissedVersion: null,
+                seenVersions: new Set(),
+            }),
+        ).toBe(false);
+    });
+
+    test('returns false when the version was already surfaced in this session', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '1.16.0',
+                dismissedVersion: null,
+                seenVersions: new Set(['1.16.0']),
+            }),
+        ).toBe(false);
+    });
+
+    test('returns false when the dismissed version matches the incoming version', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '1.16.0',
+                dismissedVersion: '1.16.0',
+                seenVersions: new Set(),
+            }),
+        ).toBe(false);
+    });
+
+    test('returns true when a different version was previously dismissed', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '1.17.0',
+                dismissedVersion: '1.16.0',
+                seenVersions: new Set(),
+            }),
+        ).toBe(true);
+    });
+
+    test('treats null dismissedVersion as no prior dismissal', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '1.16.0',
+                dismissedVersion: null,
+                seenVersions: new Set(['1.15.0']),
+            }),
+        ).toBe(true);
+    });
+
+    test('seen set blocks even when dismissed version differs', () => {
+        expect(
+            shouldShowOpenCodeUpdateToast({
+                version: '1.16.0',
+                dismissedVersion: '1.15.0',
+                seenVersions: new Set(['1.16.0']),
+            }),
+        ).toBe(false);
+    });
+});
+
+describe('resolveOpenCodeUpdateVersion', () => {
+    test('returns the trimmed version when detail.version is a string', () => {
+        expect(resolveOpenCodeUpdateVersion({ version: '1.16.0' })).toBe('1.16.0');
+    });
+
+    test('trims surrounding whitespace from a string version', () => {
+        expect(resolveOpenCodeUpdateVersion({ version: '  1.16.0  ' })).toBe('1.16.0');
+    });
+
+    test('returns empty string when detail is null', () => {
+        expect(resolveOpenCodeUpdateVersion(null)).toBe('');
+    });
+
+    test('returns empty string when detail is undefined', () => {
+        expect(resolveOpenCodeUpdateVersion(undefined)).toBe('');
+    });
+
+    test('returns empty string when detail is not an object', () => {
+        expect(resolveOpenCodeUpdateVersion('1.16.0')).toBe('');
+        expect(resolveOpenCodeUpdateVersion(42)).toBe('');
+        expect(resolveOpenCodeUpdateVersion(true)).toBe('');
+    });
+
+    test('returns empty string when the version field is missing', () => {
+        expect(resolveOpenCodeUpdateVersion({})).toBe('');
+    });
+
+    test('returns empty string when the version field is non-string', () => {
+        expect(resolveOpenCodeUpdateVersion({ version: 116 })).toBe('');
+        expect(resolveOpenCodeUpdateVersion({ version: null })).toBe('');
+        expect(resolveOpenCodeUpdateVersion({ version: { major: 1 } })).toBe('');
+    });
+});
+
+describe('resolveOpenCodeUpgradeStatusVersion', () => {
+    test('returns the trimmed latestVersion when available is true', () => {
+        expect(
+            resolveOpenCodeUpgradeStatusVersion({
+                available: true,
+                latestVersion: '1.16.0',
+            }),
+        ).toBe('1.16.0');
+    });
+
+    test('trims surrounding whitespace from latestVersion', () => {
+        expect(
+            resolveOpenCodeUpgradeStatusVersion({
+                available: true,
+                latestVersion: '  1.16.0  ',
+            }),
+        ).toBe('1.16.0');
+    });
+
+    test('returns empty string when status is null', () => {
+        expect(resolveOpenCodeUpgradeStatusVersion(null)).toBe('');
+    });
+
+    test('returns empty string when status is undefined', () => {
+        expect(resolveOpenCodeUpgradeStatusVersion(undefined)).toBe('');
+    });
+
+    test('returns empty string when available is false', () => {
+        expect(
+            resolveOpenCodeUpgradeStatusVersion({
+                available: false,
+                latestVersion: '1.16.0',
+            }),
+        ).toBe('');
+    });
+
+    test('returns empty string when available is missing or null', () => {
+        expect(
+            resolveOpenCodeUpgradeStatusVersion({
+                latestVersion: '1.16.0',
+            }),
+        ).toBe('');
+        expect(
+            resolveOpenCodeUpgradeStatusVersion({
+                available: null,
+                latestVersion: '1.16.0',
+            }),
+        ).toBe('');
+    });
+
+    test('returns empty string when latestVersion is missing', () => {
+        expect(resolveOpenCodeUpgradeStatusVersion({ available: true })).toBe('');
+    });
+
+    test('returns empty string when latestVersion is non-string', () => {
+        expect(
+            resolveOpenCodeUpgradeStatusVersion({
+                available: true,
+                latestVersion: null,
+            }),
+        ).toBe('');
+    });
+});
diff --git a/packages/ui/src/components/update/openCodeUpdateDedup.ts b/packages/ui/src/components/update/openCodeUpdateDedup.ts
new file mode 100644
index 00000000..be2cd54e
--- /dev/null
+++ b/packages/ui/src/components/update/openCodeUpdateDedup.ts
@@ -0,0 +1,96 @@
+/**
+ * Pure decision helpers for the OpenCode update toast and PWA install toast.
+ *
+ * Extracted from `OpenCodeUpdateToast.tsx` and `usePwaInstallPrompt.ts` so the
+ * dedup decisions can be unit-tested without a DOM, storage, or React. The
+ * React surfaces remain the sole owners of side effects (storage writes,
+ * `toast.info`, event listeners). This module only answers the question
+ * "given these inputs, should we show the toast?".
+ *
+ * Exposed for unit testing. Not part of the stable consumer surface.
+ */
+
+export interface PwaInstallToastDecisionInput {
+  /** Persistent localStorage entry: `'true'` when the user dismissed once. */
+  readonly dismissed: string | null;
+  /** Session-scoped sessionStorage flag set the first time the toast is shown in this tab. */
+  readonly sessionShown: string | null;
+  /** Whether the current React effect already holds a toast id. */
+  readonly hasActiveToast: boolean;
+}
+
+/**
+ * Returns `true` if the PWA install prompt toast should be shown for the
+ * incoming `beforeinstallprompt` event.
+ *
+ * The decision composes three gates (any failure short-circuits):
+ *  1. Persistent dismissal wins for all future visits.
+ *  2. Per-tab dedup avoids re-showing inside the same browsing session.
+ *  3. Re-entrancy guard prevents stacking when the effect already owns one.
+ */
+export const shouldShowPwaInstallToast = (input: PwaInstallToastDecisionInput): boolean => {
+  if (input.dismissed === 'true') return false;
+  if (input.sessionShown === 'true') return false;
+  if (input.hasActiveToast) return false;
+  return true;
+};
+
+export interface OpenCodeUpdateToastDecisionInput {
+  /** Version string reported by the server (already trimmed by the caller). */
+  readonly version: string;
+  /** Most recent version the user explicitly dismissed, or `null` if none. */
+  readonly dismissedVersion: string | null;
+  /** Set of versions already surfaced in this tab session. */
+  readonly seenVersions: ReadonlySet<string>;
+}
+
+/**
+ * Returns `true` if the OpenCode update toast should be shown for `version`.
+ *
+ * Empty/whitespace-only versions short-circuit to `false`. A non-null
+ * `dismissedVersion` matching the incoming version also short-circuits; a
+ * different `dismissedVersion` means a newer release has appeared since the
+ * last dismissal and the toast surfaces again.
+ */
+export const shouldShowOpenCodeUpdateToast = (
+  input: OpenCodeUpdateToastDecisionInput,
+): boolean => {
+  if (!input.version) return false;
+  if (input.seenVersions.has(input.version)) return false;
+  if (input.dismissedVersion !== null && input.dismissedVersion === input.version) return false;
+  return true;
+};
+
+/**
+ * Coerces the `detail.version` carried by an `openchamber:opencode-update-available`
+ * CustomEvent into a trimmed string, or returns `''` when the payload is
+ * missing or shaped unexpectedly.
+ *
+ * Only `string` is accepted; numeric or boolean payloads are rejected because
+ * downstream callers compare versions by literal equality.
+ */
+export const resolveOpenCodeUpdateVersion = (detail: unknown): string => {
+  if (detail === null || typeof detail !== 'object') return '';
+  const candidate = (detail as { version?: unknown }).version;
+  if (typeof candidate !== 'string') return '';
+  return candidate.trim();
+};
+
+export interface OpenCodeUpgradeStatusLike {
+  readonly available?: boolean | null;
+  readonly latestVersion?: string | null;
+}
+
+/**
+ * Pulls the candidate version out of an `/api/opencode/upgrade-status` JSON
+ * payload. Returns `''` when the payload is missing the field, has the wrong
+ * type, or reports `available !== true`.
+ */
+export const resolveOpenCodeUpgradeStatusVersion = (
+  status: OpenCodeUpgradeStatusLike | null | undefined,
+): string => {
+  if (!status) return '';
+  if (status.available !== true) return '';
+  if (typeof status.latestVersion !== 'string') return '';
+  return status.latestVersion.trim();
+};
diff --git a/packages/ui/src/hooks/usePwaInstallPrompt.ts b/packages/ui/src/hooks/usePwaInstallPrompt.ts
index 54e25c7d..7f2f829c 100644
--- a/packages/ui/src/hooks/usePwaInstallPrompt.ts
+++ b/packages/ui/src/hooks/usePwaInstallPrompt.ts
@@ -3,7 +3,8 @@ import { toast } from '@/components/ui';
 import { isWebRuntime } from '@/lib/desktop';
 import { usePwaDetection } from '@/hooks/usePwaDetection';
 import { useI18n } from '@/lib/i18n';
-import { getSafeSessionStorage } from '@/stores/utils/safeStorage';
+import { getSafeSessionStorage, getSafeStorage } from '@/stores/utils/safeStorage';
+import { shouldShowPwaInstallToast } from '@/components/update/openCodeUpdateDedup';
 
 type InstallPromptOutcome = 'accepted' | 'dismissed';
 
@@ -13,6 +14,7 @@ type BeforeInstallPromptEvent = Event & {
 };
 
 const INSTALL_TOAST_SESSION_KEY = 'pwa-install-toast-shown';
+const INSTALL_TOAST_DISMISSED_KEY = 'pwa-install-toast-dismissed';
 
 export const usePwaInstallPrompt = () => {
   const { browserTab } = usePwaDetection();
@@ -64,12 +66,14 @@ export const usePwaInstallPrompt = () => {
       installEvent.preventDefault();
       deferredPrompt = installEvent;
 
+      const localStorage = getSafeStorage();
       const sessionStorage = getSafeSessionStorage();
-      if (sessionStorage.getItem(INSTALL_TOAST_SESSION_KEY) === 'true') {
-        return;
-      }
-
-      if (installToastId !== null) {
+      const decision = shouldShowPwaInstallToast({
+        dismissed: localStorage.getItem(INSTALL_TOAST_DISMISSED_KEY),
+        sessionShown: sessionStorage.getItem(INSTALL_TOAST_SESSION_KEY),
+        hasActiveToast: installToastId !== null,
+      });
+      if (!decision) {
         return;
       }
 
@@ -83,6 +87,13 @@ export const usePwaInstallPrompt = () => {
             void triggerInstall();
           },
         },
+        cancel: {
+          label: tRef.current('pwa.installPrompt.dismiss'),
+          onClick: () => {
+            getSafeStorage().setItem(INSTALL_TOAST_DISMISSED_KEY, 'true');
+            dismissInstallToast();
+          },
+        },
       });
     };
 
diff --git a/packages/ui/src/lib/i18n/messages/en.ts b/packages/ui/src/lib/i18n/messages/en.ts
index 5b08f74a..f85abbfb 100644
--- a/packages/ui/src/lib/i18n/messages/en.ts
+++ b/packages/ui/src/lib/i18n/messages/en.ts
@@ -16,6 +16,7 @@ export const dict = {
   'common.revealPath.fileManager': 'Open in File Manager',
   'pwa.installPrompt.description': 'Install OpenChamber for quicker access',
   'pwa.installPrompt.action': 'Install',
+  'pwa.installPrompt.dismiss': 'Dismiss',
   'pwa.installPrompt.started': 'Install started',
   'pwa.installPrompt.installed': 'OpenChamber installed',
   'layout.mainTab.chat': 'Chat',
@@ -2210,6 +2211,7 @@ export const dict = {
   'opencodeUpdate.toast.available.title': 'OpenCode update available',
   'opencodeUpdate.toast.available.description': 'Version {version} is ready to install.',
   'opencodeUpdate.toast.actions.update': 'Update',
+  'opencodeUpdate.toast.actions.dismiss': 'Dismiss',
   'opencodeUpdate.toast.actions.reload': 'Reload OpenCode',
   'opencodeUpdate.toast.upgrading.title': 'Updating OpenCode...',
   'opencodeUpdate.toast.upgrading.description': 'Keep OpenChamber open.',
diff --git a/packages/ui/src/lib/i18n/messages/es.ts b/packages/ui/src/lib/i18n/messages/es.ts
index be3dd967..a0269d6d 100644
--- a/packages/ui/src/lib/i18n/messages/es.ts
+++ b/packages/ui/src/lib/i18n/messages/es.ts
@@ -17,6 +17,7 @@ export const dict: Record<I18nKey, string> = {
   "common.revealPath.fileManager": "Abrir en gestor de archivos",
   "pwa.installPrompt.description": "Instala OpenChamber para acceder más rápido",
   "pwa.installPrompt.action": "Instalar",
+  "pwa.installPrompt.dismiss": "Descartar",
   "pwa.installPrompt.started": "Instalación iniciada",
   "pwa.installPrompt.installed": "OpenChamber se instaló",
   "layout.mainTab.chat": "Chat",
@@ -2176,6 +2177,7 @@ export const dict: Record<I18nKey, string> = {
   "opencodeUpdate.toast.available.title": "Actualización de OpenCode disponible",
   "opencodeUpdate.toast.available.description": "La versión {version} está lista para instalar.",
   "opencodeUpdate.toast.actions.update": "Actualizar",
+  "opencodeUpdate.toast.actions.dismiss": "Descartar",
   "opencodeUpdate.toast.actions.reload": "Recargar OpenCode",
   "opencodeUpdate.toast.upgrading.title": "Actualizando OpenCode...",
   "opencodeUpdate.toast.upgrading.description": "Mantén OpenChamber abierto.",
diff --git a/packages/ui/src/lib/i18n/messages/ko.ts b/packages/ui/src/lib/i18n/messages/ko.ts
index ab1a9b87..f8ef57f6 100644
--- a/packages/ui/src/lib/i18n/messages/ko.ts
+++ b/packages/ui/src/lib/i18n/messages/ko.ts
@@ -17,6 +17,7 @@ export const dict: Record<I18nKey, string> = {
   'common.revealPath.fileManager': '파일 관리자에서 열기',
   'pwa.installPrompt.description': '더 빠르게 접근하려면 OpenChamber를 설치하세요',
   'pwa.installPrompt.action': '설치',
+  'pwa.installPrompt.dismiss': '닫기',
   'pwa.installPrompt.started': '설치가 시작되었습니다',
   'pwa.installPrompt.installed': 'OpenChamber가 설치되었습니다',
   'layout.mainTab.chat': '채팅',
@@ -2210,6 +2211,7 @@ export const dict: Record<I18nKey, string> = {
   'opencodeUpdate.toast.available.title': 'OpenCode 업데이트 사용 가능',
   'opencodeUpdate.toast.available.description': '버전 {version}을 설치할 수 있습니다.',
   'opencodeUpdate.toast.actions.update': '업데이트',
+  'opencodeUpdate.toast.actions.dismiss': '닫기',
   'opencodeUpdate.toast.actions.reload': 'OpenCode 다시 로드',
   'opencodeUpdate.toast.upgrading.title': 'OpenCode 업데이트 중...',
   'opencodeUpdate.toast.upgrading.description': 'OpenChamber를 열어 두세요.',
diff --git a/packages/ui/src/lib/i18n/messages/pl.ts b/packages/ui/src/lib/i18n/messages/pl.ts
index d3cef39b..f2aa3233 100644
--- a/packages/ui/src/lib/i18n/messages/pl.ts
+++ b/packages/ui/src/lib/i18n/messages/pl.ts
@@ -18,6 +18,7 @@ export const dict: Record<I18nKey, string> = {
   'common.revealPath.fileManager': 'Otwórz w Menedżerze plików',
   'pwa.installPrompt.description': 'Zainstaluj OpenChamber, aby mieć szybszy dostęp',
   'pwa.installPrompt.action': 'Zainstaluj',
+  'pwa.installPrompt.dismiss': 'Odrzuć',
   'pwa.installPrompt.started': 'Instalacja rozpoczęta',
   'pwa.installPrompt.installed': 'OpenChamber został zainstalowany',
   'layout.mainTab.chat': 'Czat',
@@ -2191,6 +2192,7 @@ export const dict: Record<I18nKey, string> = {
   'opencodeUpdate.toast.available.title': 'Dostępna aktualizacja OpenCode',
   'opencodeUpdate.toast.available.description': 'Wersja {version} jest gotowa do instalacji.',
   'opencodeUpdate.toast.actions.update': 'Aktualizuj',
+  'opencodeUpdate.toast.actions.dismiss': 'Odrzuć',
   'opencodeUpdate.toast.actions.reload': 'Przeładuj OpenCode',
   'opencodeUpdate.toast.upgrading.title': 'Aktualizowanie OpenCode...',
   'opencodeUpdate.toast.upgrading.description': 'Pozostaw OpenChamber otwarte.',
diff --git a/packages/ui/src/lib/i18n/messages/pt-BR.ts b/packages/ui/src/lib/i18n/messages/pt-BR.ts
index 3bcc5fc7..05e75d04 100644
--- a/packages/ui/src/lib/i18n/messages/pt-BR.ts
+++ b/packages/ui/src/lib/i18n/messages/pt-BR.ts
@@ -17,6 +17,7 @@ export const dict: Record<I18nKey, string> = {
   "common.revealPath.fileManager": "Abrir no gerenciador de arquivos",
   "pwa.installPrompt.description": "Instale o OpenChamber para acessar mais rápido",
   "pwa.installPrompt.action": "Instalar",
+  "pwa.installPrompt.dismiss": "Dispensar",
   "pwa.installPrompt.started": "Instalação iniciada",
   "pwa.installPrompt.installed": "OpenChamber instalado",
   "layout.mainTab.chat": "Chat",
@@ -2176,6 +2177,7 @@ export const dict: Record<I18nKey, string> = {
   "opencodeUpdate.toast.available.title": "Atualização do OpenCode disponível",
   "opencodeUpdate.toast.available.description": "A versão {version} está pronta para instalar.",
   "opencodeUpdate.toast.actions.update": "Atualizar",
+  "opencodeUpdate.toast.actions.dismiss": "Dispensar",
   "opencodeUpdate.toast.actions.reload": "Recarregar OpenCode",
   "opencodeUpdate.toast.upgrading.title": "Atualizando OpenCode...",
   "opencodeUpdate.toast.upgrading.description": "Mantenha o OpenChamber aberto.",
diff --git a/packages/ui/src/lib/i18n/messages/uk.ts b/packages/ui/src/lib/i18n/messages/uk.ts
index a43bbeb9..d3292661 100644
--- a/packages/ui/src/lib/i18n/messages/uk.ts
+++ b/packages/ui/src/lib/i18n/messages/uk.ts
@@ -17,6 +17,7 @@ export const dict: Record<I18nKey, string> = {
   "common.revealPath.fileManager": "Відкрити у файловому менеджері",
   "pwa.installPrompt.description": "Установіть OpenChamber для швидшого доступу",
   "pwa.installPrompt.action": "Установити",
+  "pwa.installPrompt.dismiss": "Сховати",
   "pwa.installPrompt.started": "Установлення розпочато",
   "pwa.installPrompt.installed": "OpenChamber встановлено",
   "layout.mainTab.chat": "Чат",
@@ -2176,6 +2177,7 @@ export const dict: Record<I18nKey, string> = {
   "opencodeUpdate.toast.available.title": "Доступне оновлення OpenCode",
   "opencodeUpdate.toast.available.description": "Версія {version} готова до встановлення.",
   "opencodeUpdate.toast.actions.update": "Оновити",
+  "opencodeUpdate.toast.actions.dismiss": "Сховати",
   "opencodeUpdate.toast.actions.reload": "Перезавантажити OpenCode",
   "opencodeUpdate.toast.upgrading.title": "Оновлення OpenCode...",
   "opencodeUpdate.toast.upgrading.description": "Залиште OpenChamber відкритим.",
diff --git a/packages/ui/src/lib/i18n/messages/zh-CN.ts b/packages/ui/src/lib/i18n/messages/zh-CN.ts
index f5c4759e..721cb7b7 100644
--- a/packages/ui/src/lib/i18n/messages/zh-CN.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-CN.ts
@@ -17,6 +17,7 @@ export const dict: Record<I18nKey, string> = {
   'common.revealPath.fileManager': '在文件管理器中打开',
   'pwa.installPrompt.description': '安装 OpenChamber 以便更快访问',
   'pwa.installPrompt.action': '安装',
+  'pwa.installPrompt.dismiss': '忽略',
   'pwa.installPrompt.started': '已开始安装',
   'pwa.installPrompt.installed': 'OpenChamber 已安装',
   'layout.mainTab.chat': '聊天',
@@ -2176,6 +2177,7 @@ export const dict: Record<I18nKey, string> = {
   'opencodeUpdate.toast.available.title': 'OpenCode 有可用更新',
   'opencodeUpdate.toast.available.description': '版本 {version} 已可安装。',
   'opencodeUpdate.toast.actions.update': '更新',
+  'opencodeUpdate.toast.actions.dismiss': '忽略',
   'opencodeUpdate.toast.actions.reload': '重载 OpenCode',
   'opencodeUpdate.toast.upgrading.title': '正在更新 OpenCode...',
   'opencodeUpdate.toast.upgrading.description': '请保持 OpenChamber 打开。',