@@ -0,0 +1,11 @@
+---
+'@object-ui/app-shell': patch
+'@object-ui/i18n': patch
+---
+
+fix(app-shell): Studio's publish review sheet says a customization lives in this environment's database and moves only by `os package export` (#30119)
+
+Clause-②: yes (widening) — new `@object-ui/i18n` key `preview.changes.customizationEnvironment` in every pack; `preview/savedToCustomization` gains `customizationEnvironmentText` and `PACKAGE_EXPORT_COMMAND`
+Metadata-protocol: none
+
+Reviewing a read-only package's customizations, the sheet adds one line under "Saved to BASE's customizations": the changes are kept in this environment's database as items of the `.custom` package it names (the id the server answered for the base), not in the project's source, and they reach another environment only through `os package export`.
@@ -87,7 +87,7 @@ import {
 // spec-named local declaration is what `scripts/check-spec-symbol-derivation.mjs`
 // refuses, and a faithful copy is exactly the fork that guard exists to prevent.
 import { fetchPendingDrafts } from './usePendingDrafts.js';
-import { savedToCustomizationText } from './savedToCustomization.js';
+import { customizationEnvironmentText, savedToCustomizationText } from './savedToCustomization.js';
 import { canonicalMetaUrlType } from '@objectstack/spec/shared';
 import { resolveI18nLabel, type I18nLabel } from '@objectstack/spec/ui';
 import { MetadataProtectionFields, OverrideDeclarationFields, stripReadDecorations } from '@objectstack/spec/kernel';
@@ -1406,7 +1406,9 @@ export interface DraftChangesPanelProps {
    * objectstack ADR-0146 D3 — the label of the read-only base whose
    * `<base>.custom` pair these drafts are saved to. When set, the sheet says
    * so under its title ({@link savedToCustomizationText}); the host passes it
-   * only while it reviews a pair's drafts.
+   * only while it reviews a pair's drafts, so `packageId` is then the pair, and
+   * the sheet names it in the line that says where the changes live
+   * ({@link customizationEnvironmentText}, objectstack#30119).
    */
   customizationOf?: string;
 }
@@ -1702,6 +1704,14 @@ export function DraftChangesPanel({
               {savedToCustomizationText(t, customizationOf)}
             </p>
           ) : null}
+          {/* objectstack#30119 (ADR-0146 D2) — and where they live: this
+            * environment's database, as items of the pair (`packageId`, the
+            * pair the host reviews), moved only by `os package export`. */}
+          {customizationOf && packageId ? (
+            <p data-testid="draft-changes-environment" className="text-xs text-muted-foreground">
+              {customizationEnvironmentText(t, packageId)}
+            </p>
+          ) : null}
         </SheetHeader>
         {posture === 'confirm' && entries && entries.length > 0 && !error ? (
           // objectui#12517 — what the publish carries, counted off the same
 
@@ -27,6 +27,7 @@ vi.mock('@object-ui/i18n', async (importOriginal) => {
 
 import { createI18n, I18nProvider } from '@object-ui/i18n';
 import { DraftChangesPanel, computeChangeDetail } from '../DraftChangesPanel';
+import { PACKAGE_EXPORT_COMMAND, customizationEnvironmentText } from '../savedToCustomization';
 
 afterEach(() => {
   vi.restoreAllMocks();
@@ -293,5 +294,40 @@ describe('DraftChangesPanel — names the base whose customizations it saves (ob
     renderIn('en');
     await waitFor(() => expect(screen.getByText('ticket')).toBeInTheDocument());
     expect(screen.queryByTestId('draft-changes-saved-to')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('draft-changes-environment')).not.toBeInTheDocument();
+  });
+
+  /*
+   * objectstack#30119 (ADR-0146 D2) — under it, where the changes live: this
+   * environment's database, as items of the pair the host reviews (its
+   * `packageId`, named as served), and the one command that moves them,
+   * verbatim in every pack.
+   */
+  it('names the pair and `os package export` in the line under it, in en', async () => {
+    renderIn('en', { customizationOf: 'HotCRM', packageId: 'com.hotcrm.custom' });
+    const line = await screen.findByTestId('draft-changes-environment');
+    expect(line.textContent).toContain('this environment’s database');
+    expect(line.textContent).toContain('com.hotcrm.custom');
+    expect(line.textContent).toContain('os package export');
+  });
+
+  it('keeps the pair id and the command untranslated in zh', async () => {
+    renderIn('zh', { customizationOf: 'HotCRM', packageId: 'com.hotcrm.custom' });
+    const line = await screen.findByTestId('draft-changes-environment');
+    expect(line.textContent).toContain('当前环境的数据库');
+    expect(line.textContent).toContain('com.hotcrm.custom');
+    expect(line.textContent).toContain('os package export');
+  });
+});
+
+describe('the environment line keeps the command verbatim in every pack (objectstack#30119)', () => {
+  const LOCALES = ['en', 'zh', 'ja', 'ko', 'de', 'fr', 'es', 'pt', 'ru', 'ar'] as const;
+  it.each(LOCALES)('%s: names the pair and `os package export` once each', async (lang) => {
+    const i18n = createI18n({ defaultLanguage: lang, detectBrowserLanguage: false });
+    await i18n.changeLanguage(lang);
+    const text = customizationEnvironmentText(i18n.t.bind(i18n) as never, 'com.hotcrm.custom');
+    expect(text).not.toContain('{{');
+    expect(text.split('com.hotcrm.custom')).toHaveLength(2);
+    expect(text.split(PACKAGE_EXPORT_COMMAND)).toHaveLength(2);
   });
 });
@@ -23,6 +23,29 @@ export function savedToCustomizationText(t: Translate, baseLabel: string): strin
   });
 }
 
+/**
+ * The command that moves a customization to another environment, spelled
+ * verbatim in every language: it is typed, not read (objectstack#30119).
+ */
+export const PACKAGE_EXPORT_COMMAND = 'os package export';
+
+/**
+ * objectstack#30119 (ADR-0146 D2) — the sentence under "Saved to BASE's
+ * customizations" in the pending-changes sheet: the changes live in this
+ * environment's database as items of `pairId`, the `<base>.custom` package
+ * the server answered for the base, not in the project's source, and only
+ * {@link PACKAGE_EXPORT_COMMAND} takes them to another environment. True on
+ * every deployment, so it is not switched by the served `environment`.
+ */
+export function customizationEnvironmentText(t: Translate, pairId: string): string {
+  return t('preview.changes.customizationEnvironment', {
+    pair: pairId,
+    command: PACKAGE_EXPORT_COMMAND,
+    defaultValue:
+      'These changes are kept in this environment’s database as items of {{pair}}, not in your project’s source. They reach another environment only through {{command}}.',
+  });
+}
+
 /** {@link savedToCustomizationText} as an element, for the Studio item header's note line. */
 export function SavedToCustomizationNote({ baseLabel, testId }: { baseLabel: string; testId?: string }) {
   const { t } = useObjectTranslation();
 
@@ -4951,6 +4951,7 @@ const ar = {
       title: 'التغييرات المعلّقة',
       description: 'ما الذي سيغيّره النشر. تُضاف العناصر الجديدة؛ وتستبدل التحديثات النسخة المنشورة.',
       savedToCustomization: 'محفوظ في تخصيصات {{package}}',
+      customizationEnvironment: 'تُحفظ هذه التغييرات في قاعدة بيانات هذه البيئة كعناصر في {{pair}}، وليست في الشيفرة المصدرية لمشروعك. لا تنتقل إلى بيئة أخرى إلا عبر {{command}}.',
       loading: 'جارٍ تحميل التغييرات المعلّقة…',
       loadFailed: 'تعذّر تحميل التغييرات المعلّقة:',
       empty: 'لا شيء معلّق — نُشرت كل المسودات.',
 
@@ -4546,6 +4546,7 @@ const de = {
       title: 'Ausstehende Änderungen',
       description: 'Was die Veröffentlichung ändert. Neue Elemente werden hinzugefügt; Aktualisierungen überschreiben die Live-Version.',
       savedToCustomization: 'Gespeichert in den Anpassungen von {{package}}',
+      customizationEnvironment: 'Diese Änderungen liegen in der Datenbank dieser Umgebung, als Elemente von {{pair}}, nicht im Quellcode Ihres Projekts. In eine andere Umgebung gelangen sie nur mit {{command}}.',
       loading: 'Ausstehende Änderungen werden geladen…',
       loadFailed: 'Ausstehende Änderungen konnten nicht geladen werden:',
       empty: 'Nichts ausstehend — alle Entwürfe wurden veröffentlicht.',
 
@@ -4009,6 +4009,9 @@ const en = {
       description: 'What publishing will change. New items are added; updates overwrite the live version.',
       // ADR-0146 D3 — where a customization of a read-only base is saved: its `.custom` pair.
       savedToCustomization: 'Saved to {{package}}’s customizations',
+      // objectstack#30119 (ADR-0146 D2) — the pair lives in this environment's database and moves only by export;
+      // `command` is always the literal `os package export`, never translated.
+      customizationEnvironment: 'These changes are kept in this environment’s database as items of {{pair}}, not in your project’s source. They reach another environment only through {{command}}.',
       loading: 'Loading pending changes…',
       loadFailed: 'Could not load pending changes:',
       empty: 'Nothing pending — every draft has been published.',
 
@@ -4648,6 +4648,7 @@ const es = {
       title: 'Cambios pendientes',
       description: 'Lo que cambiará al publicar. Los elementos nuevos se añaden; las actualizaciones sobrescriben la versión publicada.',
       savedToCustomization: 'Guardado en las personalizaciones de {{package}}',
+      customizationEnvironment: 'Estos cambios se guardan en la base de datos de este entorno, como elementos de {{pair}}, no en el código fuente de su proyecto. Solo llegan a otro entorno mediante {{command}}.',
       loading: 'Cargando cambios pendientes…',
       loadFailed: 'No se pudieron cargar los cambios pendientes:',
       empty: 'Nada pendiente — todos los borradores se han publicado.',
 
@@ -4644,6 +4644,7 @@ const fr = {
       title: 'Modifications en attente',
       description: 'Ce que la publication changera. Les nouveaux éléments sont ajoutés ; les mises à jour remplacent la version en ligne.',
       savedToCustomization: 'Enregistré dans les personnalisations de {{package}}',
+      customizationEnvironment: 'Ces modifications sont stockées dans la base de données de cet environnement, comme éléments de {{pair}}, et non dans les sources de votre projet. Elles ne passent dans un autre environnement que par {{command}}.',
       loading: 'Chargement des modifications en attente…',
       loadFailed: 'Impossible de charger les modifications en attente :',
       empty: 'Rien en attente — tous les brouillons ont été publiés.',
 
@@ -4548,6 +4548,7 @@ const ja = {
       title: '保留中の変更',
       description: '公開で何が変わるか。新規項目は追加され、更新は公開中のバージョンを上書きします。',
       savedToCustomization: '{{package}} のカスタマイズに保存',
+      customizationEnvironment: 'これらの変更はこの環境のデータベースに {{pair}} の項目として保存され、プロジェクトのソースには含まれません。別の環境へは {{command}} でのみ移せます。',
       loading: '保留中の変更を読み込み中…',
       loadFailed: '保留中の変更を読み込めませんでした:',
       empty: '保留中の変更はありません — すべてのドラフトが公開済みです。',