@@ -0,0 +1,14 @@
+---
+'@object-ui/core': patch
+'@object-ui/plugin-detail': patch
+'@object-ui/app-shell': patch
+---
+
+fix(plugin-detail,app-shell): the related list, the reference rail and the packaged-actions table name a renamed object by the name the server serves
+
+Clause-②: yes (widening)
+Metadata-protocol: none
+
+- **The surfaces.** A `record:related_list` block and a `record:reference_rail` card with no authored `title` are headed with the related object's served plural label, else its served label, as the server translated it for the session (a `.custom` extension's rename included). They used to ask only the client translation bundle, which still held the base package's name. The bundle is asked only when the server serves neither.
+- **Packaged actions.** Setup → Packaged Actions reads the object list in the session's language (`Accept-Language`), not the browser's, and its Object column draws that served label as given.
+- **The widening.** The served-object-label rule now lives in `@object-ui/core`, which `@object-ui/plugin-detail` can import: new exports `servedObjectLabel`, `servedObjectPluralLabel`, `metadataText` and the types `ObjectLabelLookup` and `ObjectPluralLabelLookup`. app-shell's internal copy is now a re-export of these, so both packages read one rule.
@@ -7,77 +7,21 @@
  */
 
 /**
- * The served-object-label rule (objectstack#30311, objectstack#30390), as pure
- * functions: a label the server served is already translated for the session,
- * so it is drawn as given, and the client bundle is asked only when none is
- * served. A module of its own, with no provider imports, so every surface that
- * names an object can read it without pulling the metadata store into its
- * module graph. Internal to app-shell: ⛔ not re-exported from the package entry.
+ * The served-object-label rule (objectstack#30311, objectstack#30390), for
+ * app-shell's importers. The rule itself lives in `@object-ui/core`
+ * (`utils/served-object-label.ts`) since objectstack#30486, so the related
+ * list and reference rail in `@object-ui/plugin-detail`, which cannot import
+ * this package, read the very same functions. ⛔ Keep this a re-export: a
+ * second body here is the drift that move closed. Internal to app-shell: ⛔ not
+ * re-exported from the package entry.
  *
  * @module
  */
 
-import { resolveI18nLabel as resolveInlineI18nLabel } from '@objectstack/spec/ui';
-
-/**
- * A metadata label (plain string or inline locale map) as display text, or
- * `undefined` when there is none. Shared with `useRecentItemLabel`, which asks
- * the same question of a page or a report (objectui#11678).
- */
-export function metadataText(label: unknown, language: string | undefined): string | undefined {
-  const text = resolveInlineI18nLabel(label as Parameters<typeof resolveInlineI18nLabel>[0], language);
-  return typeof text === 'string' && text.trim() !== '' ? text : undefined;
-}
-
-/** `''` from a bundle lookup that found nothing and had no metadata to fall back to. */
-function nonEmpty(text: string | undefined): string | undefined {
-  return typeof text === 'string' && text.trim() !== '' ? text : undefined;
-}
-
-/** `useObjectLabel().objectPluralLabel` — the client bundle's list-title lookup. */
-export type ObjectPluralLabelLookup = (objectDef: { name: string; label: string; pluralLabel?: string }) => string;
-
-/** `useObjectLabel().objectLabel` — the client bundle's record-noun lookup. */
-export type ObjectLabelLookup = (objectDef: { name: string; label: string }) => string;
-
-/**
- * What a served object's LIST is called (objectstack#30311): its served
- * `pluralLabel`, else its served `label`, drawn as given. The server
- * translated both, by its label order for an overridden item, so running the
- * bundle over them was a second translation pass in which the base package's
- * string won a rename back. The bundle's `objectPluralLabel` under the
- * object's name is asked only when the definition carries neither, with
- * `fallback` (client text no server translated — the object's name, say) as
- * the bundle's own last resort; `''` when nothing names it. Shared by every
- * surface that titles an object's list — the object page's header, the app
- * header, a recent object row, a related list.
- */
-export function servedObjectPluralLabel(
-  objectDef: { name: string; label?: unknown; pluralLabel?: unknown },
-  language: string | undefined,
-  objectPluralLabel: ObjectPluralLabelLookup,
-  fallback = '',
-): string {
-  // `pluralLabel` is a plain string in the spec, so only a string is one.
-  const plural = typeof objectDef.pluralLabel === 'string' ? nonEmpty(objectDef.pluralLabel) : undefined;
-  return plural
-    ?? metadataText(objectDef.label, language)
-    ?? objectPluralLabel({ name: objectDef.name, label: fallback });
-}
-
-/**
- * What ONE record of a served object is called — the singular sibling of
- * {@link servedObjectPluralLabel} (objectstack#30390): the served `label`,
- * drawn as given, since the server already translated it; the bundle's
- * `objectLabel` under the object's name only when the definition carries
- * none, with `fallback` as the bundle's own last resort. Every record-scoped
- * surface reads it — the record page, its form, drawer and preview card.
- */
-export function servedObjectLabel(
-  objectDef: { name: string; label?: unknown },
-  language: string | undefined,
-  objectLabel: ObjectLabelLookup,
-  fallback = '',
-): string {
-  return metadataText(objectDef.label, language) ?? objectLabel({ name: objectDef.name, label: fallback });
-}
+export {
+  metadataText,
+  servedObjectLabel,
+  servedObjectPluralLabel,
+  type ObjectLabelLookup,
+  type ObjectPluralLabelLookup,
+} from '@object-ui/core';
@@ -38,6 +38,7 @@ import { cleanup, fireEvent, render, screen, waitFor, within } from '@testing-li
 import React from 'react';
 
 import { toast } from 'sonner';
+import { createI18n, I18nProvider } from '@object-ui/i18n';
 import { PackagedActionsSection } from './PackagedActionsSection';
 
 vi.mock('sonner', () => ({ toast: { success: vi.fn() } }));
@@ -537,3 +538,76 @@ describe('the switch confirms off, says what happened, and names the object', ()
     expect(within(row).getByText('account')).toBeInTheDocument();
   });
 });
+
+/* -------------------------------------------------------------------------- */
+/* 7) The object list is read in the session's language, and its served       */
+/*    object label is drawn as given (objectstack#30486)                      */
+/* -------------------------------------------------------------------------- */
+
+/**
+ * The server translates each served object `label` for the request's
+ * `Accept-Language`, a `.custom` rename included, so the object read carries
+ * the SESSION's language and the column draws that label as given (the
+ * served-object-label rule, `servedObjectLabel`), never through the bundle's
+ * translation of the base package's name. An object served without a label
+ * shows its machine name alone, as before.
+ *
+ * Direction, written before the run: with the read's header dropped and the
+ * column put back to the bundle-first lookup, the header cell and the rename
+ * cell RED (no header; `客户`); the control GREEN on both sides.
+ */
+describe('the object column draws the served label, read in the session language (objectstack#30486)', () => {
+  function renderIn(lang: 'en' | 'zh-CN') {
+    const i18n = createI18n({ defaultLanguage: lang, detectBrowserLanguage: false });
+    expect(i18n.language).toBe(lang);
+    // The base package's translation, which a rename must win over.
+    i18n.addResourceBundle(lang, 'translation', {
+      crm: { objects: { account: { label: lang === 'zh-CN' ? '客户' : 'Account' } } },
+    }, true, true);
+    render(
+      <I18nProvider instance={i18n}>
+        <PackagedActionsSection />
+      </I18nProvider>,
+    );
+    return screen.findByTestId('packaged-action-account-send_invoice');
+  }
+
+  const objectReadHeaders = () =>
+    vi
+      .mocked(fetch)
+      .mock.calls.filter(([input]) => String(input).includes('/meta/object'))
+      .map(([, init]) => new Headers((init as RequestInit | undefined)?.headers));
+
+  it('asks for the object list in the session language', async () => {
+    await renderIn('zh-CN');
+    const headers = objectReadHeaders();
+    expect(headers.length).toBeGreaterThan(0);
+    for (const h of headers) expect(h.get('Accept-Language')).toBe('zh-CN');
+  });
+
+  it('zh-CN: a served rename is drawn as given, not the bundle translation', async () => {
+    fixture.objects = [
+      { ...packagedObject('account', [{ name: 'send_invoice', label: 'Send invoice' }]), label: '往来单位' },
+    ];
+    const row = await renderIn('zh-CN');
+    expect(within(row).getByTestId('packaged-action-object-label')).toHaveTextContent('往来单位');
+    expect(within(row).queryByText('客户')).toBeNull();
+  });
+
+  it('en: a served rename is drawn as given', async () => {
+    fixture.objects = [
+      { ...packagedObject('account', [{ name: 'send_invoice', label: 'Send invoice' }]), label: 'Counterparty' },
+    ];
+    const row = await renderIn('en');
+    expect(within(row).getByTestId('packaged-action-object-label')).toHaveTextContent('Counterparty');
+  });
+
+  it('CONTROL: an object served without a label shows only its machine name', async () => {
+    fixture.objects = [
+      { name: 'account', actions: [{ name: 'send_invoice', label: 'Send invoice' }], _packageId: 'com.objectstack.crm', _provenance: 'package' },
+    ];
+    const row = await renderIn('zh-CN');
+    expect(within(row).queryByTestId('packaged-action-object-label')).toBeNull();
+    expect(within(row).getByText('account')).toBeInTheDocument();
+  });
+});
@@ -94,6 +94,7 @@ import { actionErrorDetail } from '@object-ui/core';
 // The LEAF module, for the reason its own header gives: this section joins the
 // page's graph, and the page is imported eagerly by `services/builtinComponents`.
 import { apiBase } from '../../utils/apiBase.js';
+import { servedObjectLabel } from '../../hooks/servedObjectLabel.js';
 import { envelopeData, envelopeRefused } from './packagedFlows.js';
 import {
   collectPackagedActions,
@@ -125,18 +126,25 @@ async function readJson(res: Response): Promise<unknown> {
   return res.json().catch(() => null);
 }
 
-async function getJson(path: string, signal: AbortSignal): Promise<Response> {
+async function getJson(path: string, signal: AbortSignal, language?: string): Promise<Response> {
   return fetch(`${apiBase()}${path}`, {
     credentials: 'include',
-    headers: JSON_HEADERS,
+    headers: language ? { ...JSON_HEADERS, 'Accept-Language': language } : JSON_HEADERS,
     cache: 'no-store',
     signal,
   });
 }
 
-/** The `object` metadata list — every object, for its embedded `actions[]`. */
-async function fetchObjectMetadata(signal: AbortSignal): Promise<unknown[]> {
-  const res = await getJson('/meta/object', signal);
+/**
+ * The `object` metadata list — every object, for its embedded `actions[]` and
+ * its name. Asked in the SESSION's language (objectstack#30486): the server
+ * translates each served `label` for the request's `Accept-Language`, a
+ * `.custom` rename included, so the object column can draw it as given. A
+ * bare fetch carried the browser's language instead, and a zh-CN session in an
+ * English browser was served English names.
+ */
+async function fetchObjectMetadata(signal: AbortSignal, language: string | undefined): Promise<unknown[]> {
+  const res = await getJson('/meta/object', signal, language);
   if (!res.ok) throw new Error(`object metadata HTTP ${res.status}`);
   return readMetadataItems(await readJson(res));
 }
@@ -208,7 +216,7 @@ function rowKey(row: Pick<PackagedActionRow, 'name' | 'objectName'>): string {
 }
 
 export function PackagedActionsSection({ nonce = 0, headed = true }: PackagedActionsSectionProps) {
-  const { t } = useObjectTranslation();
+  const { t, language } = useObjectTranslation();
   const { objectLabel } = useObjectLabel();
 
   const [rows, setRows] = React.useState<PackagedActionRow[] | null>(null);
@@ -231,7 +239,7 @@ export function PackagedActionsSection({ nonce = 0, headed = true }: PackagedAct
     (async () => {
       try {
         const [objects, standalone, activation] = await Promise.all([
-          fetchObjectMetadata(controller.signal),
+          fetchObjectMetadata(controller.signal, language),
           fetchStandaloneActionMetadata(controller.signal),
           fetchActivationLedger(controller.signal),
         ]);
@@ -253,7 +261,7 @@ export function PackagedActionsSection({ nonce = 0, headed = true }: PackagedAct
       cancelled = true;
       controller.abort();
     };
-  }, [nonce, t]);
+  }, [nonce, t, language]);
 
   const clearRefusal = React.useCallback((key: string) => {
     setRefusals((prev) => {
@@ -408,10 +416,16 @@ export function PackagedActionsSection({ nonce = 0, headed = true }: PackagedAct
                     {/* The object's label in the reader's language, over the
                         machine name, which is also the `:object` segment the
                         flip addresses — `global` for an object-less action,
-                        the platform's own spelling, drawn alone. */}
+                        the platform's own spelling, drawn alone. The label is
+                        the one the server served for this session's language,
+                        drawn as given (the served-object-label rule,
+                        objectstack#30486), never re-translated by the client
+                        bundle, whose base-package name would win a rename
+                        back. An object served without a label shows its
+                        machine name alone. */}
                     {row.objectLabel && (
                       <div data-testid="packaged-action-object-label">
-                        {objectLabel({ name: row.objectName, label: row.objectLabel })}
+                        {servedObjectLabel({ name: row.objectName, label: row.objectLabel }, language, objectLabel)}
                       </div>
                     )}
                     <code className="font-mono text-xs text-muted-foreground break-all">{row.objectName}</code>
 
@@ -89,8 +89,10 @@ export interface PackagedActionRow {
   label: string;
   /**
    * The owning object's label as `GET /meta/object` serves it, when the
-   * object is in that list and declares one; the page resolves it in the
-   * reader's language and keeps the machine name beside it.
+   * object is in that list and declares one. The section reads that list in
+   * the session's language, so this is already the reader's name for the
+   * object, a `.custom` rename included; the page draws it as given
+   * (objectstack#30486) and keeps the machine name beside it.
    */
   objectLabel?: string;
   /** Activation as the ledger reports it — `true` when no row says otherwise. */
 
@@ -185,6 +185,17 @@ export * from './utils/dataset-format.js';
 // (objectstack#5473 / objectstack#5665).
 export * from './utils/dataset-pivot.js';
 export * from './utils/record-title.js';
+// The served-object-label rule (objectstack#30311, objectstack#30390): a label
+// the server served is drawn as given, and the client bundle is asked only
+// when none is served. Homed here by objectstack#30486 so `plugin-detail`'s
+// related list and reference rail read the same rule as app-shell's surfaces.
+export {
+  metadataText,
+  servedObjectLabel,
+  servedObjectPluralLabel,
+  type ObjectLabelLookup,
+  type ObjectPluralLabelLookup,
+} from './utils/served-object-label.js';
 // The one `colorField` ladder every record view shares (objectui#7243) — the
 // gantt, calendar and timeline all resolve an authored option colour here
 // instead of each guessing at the raw stored value.
 
@@ -0,0 +1,90 @@
+/**
+ * ObjectUI
+ * Copyright (c) 2024-present ObjectStack Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * The served-object-label rule (objectstack#30311, objectstack#30390), as pure
+ * functions: a label the server served is already translated for the session,
+ * so it is drawn as given, and the client bundle is asked only when none is
+ * served.
+ *
+ * Homed here (objectstack#30486) rather than in `@object-ui/app-shell`, where
+ * it was written, because `@object-ui/plugin-detail`'s related list and
+ * reference rail name an object too and cannot import `app-shell` (which
+ * depends on them). This package is the one both already import, it holds no
+ * provider, and it already reads `@objectstack/spec/ui` at runtime. app-shell's
+ * `hooks/servedObjectLabel.ts` re-exports these names for its own importers.
+ * ⛔ Do not copy the rule into another package: one rule, one home.
+ *
+ * @module
+ */
+
+import { resolveI18nLabel as resolveInlineI18nLabel } from '@objectstack/spec/ui';
+
+/**
+ * A metadata label (plain string or inline locale map) as display text, or
+ * `undefined` when there is none. Shared with app-shell's `useRecentItemLabel`,
+ * which asks the same question of a page or a report (objectui#11678).
+ */
+export function metadataText(label: unknown, language: string | undefined): string | undefined {
+  const text = resolveInlineI18nLabel(label as Parameters<typeof resolveInlineI18nLabel>[0], language);
+  return typeof text === 'string' && text.trim() !== '' ? text : undefined;
+}
+
+/** `''` from a bundle lookup that found nothing and had no metadata to fall back to. */
+function nonEmpty(text: string | undefined): string | undefined {
+  return typeof text === 'string' && text.trim() !== '' ? text : undefined;
+}
+
+/** `useObjectLabel().objectPluralLabel` — the client bundle's list-title lookup. */
+export type ObjectPluralLabelLookup = (objectDef: { name: string; label: string; pluralLabel?: string }) => string;
+
+/** `useObjectLabel().objectLabel` — the client bundle's record-noun lookup. */
+export type ObjectLabelLookup = (objectDef: { name: string; label: string }) => string;
+
+/**
+ * What a served object's LIST is called (objectstack#30311): its served
+ * `pluralLabel`, else its served `label`, drawn as given. The server
+ * translated both, by its label order for an overridden item, so running the
+ * bundle over them was a second translation pass in which the base package's
+ * string won a rename back. The bundle's `objectPluralLabel` under the
+ * object's name is asked only when the definition carries neither, with
+ * `fallback` (client text no server translated — the object's name, say) as
+ * the bundle's own last resort; `''` when nothing names it. Shared by every
+ * surface that titles an object's list — the object page's header, the app
+ * header, a recent object row, a related list, a reference rail card.
+ */
+export function servedObjectPluralLabel(
+  objectDef: { name: string; label?: unknown; pluralLabel?: unknown },
+  language: string | undefined,
+  objectPluralLabel: ObjectPluralLabelLookup,
+  fallback = '',
+): string {
+  // `pluralLabel` is a plain string in the spec, so only a string is one.
+  const plural = typeof objectDef.pluralLabel === 'string' ? nonEmpty(objectDef.pluralLabel) : undefined;
+  return plural
+    ?? metadataText(objectDef.label, language)
+    ?? objectPluralLabel({ name: objectDef.name, label: fallback });
+}
+
+/**
+ * What ONE record of a served object is called — the singular sibling of
+ * {@link servedObjectPluralLabel} (objectstack#30390): the served `label`,
+ * drawn as given, since the server already translated it; the bundle's
+ * `objectLabel` under the object's name only when the definition carries
+ * none, with `fallback` as the bundle's own last resort. Every record-scoped
+ * surface reads it — the record page, its form, drawer and preview card, and
+ * the packaged-actions table's object column.
+ */
+export function servedObjectLabel(
+  objectDef: { name: string; label?: unknown },
+  language: string | undefined,
+  objectLabel: ObjectLabelLookup,
+  fallback = '',
+): string {
+  return metadataText(objectDef.label, language) ?? objectLabel({ name: objectDef.name, label: fallback });
+}