@@ -0,0 +1,23 @@
+---
+'@object-ui/plugin-detail': patch
+'@object-ui/i18n': patch
+'@object-ui/app-shell': patch
+---
+
+feat(plugin-detail)!: the record page's related panels lose collapse — the header opens the whole list, ⠿ ＋ ⋯ on hover, ⋯ holds Hide alone, empty panels fold into one line, and the stored arrangement drops `collapsed`
+
+Clause-②: yes (narrowing)
+Metadata-protocol: none
+
+<!-- adr-0087: not-required (runtime-interface-only ui/packages/plugin-detail/src/synth/relatedArrangement.ts#RelatedArrangement, ui/packages/plugin-detail/src/synth/relatedArrangement.ts#ResolvedRelatedArrangement, ui/packages/plugin-detail/src/synth/relatedArrangement.ts#RelatedArrangementEdit, ui/packages/i18n/src/locales/en.ts#TranslationKeys) a reader's per-browser layout preference and its edit vocabulary, and the key type of the console's own translation catalogue: no Zod schema, no spec declaration and no stored metadata reads them, so the compiler is the channel that reaches every caller; the stored preference moves to version 2 and a version-1 record reads as no choice -->
+
+The record page's related column is a stack of same-shaped panels (record page v4).
+
+- **The panel header** is the title, then the count chip. The header row (or the chip) opens the panel's whole list; on hover the title's end shows › and its tooltip reads "View all N". On hover or focus the right end shows ⠿ (drag to reorder; focused, ⌥↑ / ⌥↓ move the panel), ＋ and ⋯, which now holds Hide and nothing else. There is no collapse and no ⤢, and nothing is reserved on the left.
+- **Empty panels** (0 rows) fold into one line after the others: "N more empty lists · name · … · Expand". Expand draws them again in their places. The Related tab of an authored page keeps its own line.
+- **The compact row's first column** skips the foreign key that points back at the record on the page: a product's line items, whose name field is the product, are named by their next column.
+- **The stored arrangement** (`record.related.arrangement`, per reader × object) is `{ v, order, hidden, basedOn, seen }`. `collapsed` is removed with no compatibility read: a reader's earlier record reads as no choice, and the panels show in the default order.
+
+**BREAKING** (`@object-ui/plugin-detail` and `@object-ui/i18n`, TypeScript only): `@object-ui/i18n`'s exported `TranslationKeys` loses the four `detail.relatedCard*` keys named below (a `t()` call with one of them still compiles, its key being a `string`, and reads the key back); and `RelatedArrangement` and `ResolvedRelatedArrangement` no longer carry `collapsed`, `RelatedArrangementEdit` no longer has the `collapse` kind, and `resolveRelatedArrangement` / `editRelatedArrangement` no longer take a last `defaultCollapsed` argument. The only caller is the console's own arranged column. A caller still passing one gets a compile error naming it; the fix is to drop it, since a panel has no collapsed state to set. `RELATED_ARRANGEMENT_RECORD_VERSION` (2) is new.
+
+- The i18n keys `detail.relatedCardMoveUp`, `detail.relatedCardMoveDown`, `detail.relatedCardCollapse` and `detail.relatedCardCount` leave every pack; `detail.relatedPanelViewAll`, `detail.relatedPanelReorder`, `detail.relatedPanelReorderHint` and `detail.relatedEmptyFold` arrive in all ten.
@@ -0,0 +1,53 @@
+/**
+ * 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.
+ */
+
+/**
+ * objectstack#27524, Target 10 — the stored arrangement of the record page's
+ * related panels is `{ v, order, hidden, basedOn, seen }`. `collapsed` left
+ * the shape with no compatibility read: a record of the earlier version (the
+ * one that carried it) is "no choice", and the reader gets the default order
+ * again. This file runs in the node project (no `window`).
+ */
+
+import { describe, it, expect } from 'vitest';
+import {
+  RECORD_RELATED_ARRANGEMENT_PREFERENCE,
+  objectPreferenceScope,
+  readWorkspacePreference,
+  writeWorkspacePreference,
+} from './workspacePreference';
+
+const lead = objectPreferenceScope('crm_lead');
+const KEY = 'os:pref:record.related.arrangement@object:crm_lead';
+
+const memoryStorage = () => {
+  const kept = new Map<string, string>();
+  return {
+    kept,
+    getItem: (key: string) => kept.get(key) ?? null,
+    setItem: (key: string, value: string) => void kept.set(key, value),
+  };
+};
+
+describe('record.related.arrangement — no `collapsed`, no compatibility read (objectstack#27524)', () => {
+  it('writes { order, hidden, basedOn, seen } and the version, and reads it back', () => {
+    const storage = memoryStorage();
+    const value = { order: ['task.lead_id', 'note.parent_id'], hidden: ['call.lead_id'], basedOn: 'abcd1234', seen: { 'task.lead_id': 1 } };
+    writeWorkspacePreference(RECORD_RELATED_ARRANGEMENT_PREFERENCE, lead, value, storage);
+    const stored = JSON.parse(storage.kept.get(KEY)!);
+    expect(Object.keys(stored).sort()).toEqual(['basedOn', 'hidden', 'order', 'seen', 'v']);
+    expect(stored.v).toBe(2);
+    expect(readWorkspacePreference(RECORD_RELATED_ARRANGEMENT_PREFERENCE, lead, storage)).toEqual(value);
+  });
+
+  it('reads no choice from a record of the shape that carried `collapsed`', () => {
+    const earlier = JSON.stringify({ order: ['note.parent_id'], collapsed: ['task.lead_id'], hidden: [], basedOn: 'abcd1234', v: 1 });
+    const storage = { getItem: (key: string) => (key === KEY ? earlier : null) };
+    expect(readWorkspacePreference(RECORD_RELATED_ARRANGEMENT_PREFERENCE, lead, storage)).toBeUndefined();
+  });
+});
@@ -8,6 +8,7 @@
 
 import { useCallback, useSyncExternalStore } from 'react';
 import {
+  RELATED_ARRANGEMENT_RECORD_VERSION,
   relatedArrangementFromRecord,
   relatedArrangementToRecord,
   type RelatedArrangement,
@@ -157,18 +158,20 @@ export const RECORD_RELATED_COLUMN_PREFERENCE = defineWorkspacePreference<Prefer
 });
 
 /**
- * How the reader arranged the record page's related cards, per object
- * (scope `object:OBJECT_NAME`, objectstack#27055): `{ v, order, collapsed,
- * hidden, basedOn }` — plus `seen`, the first-seen stamps of relationships new
- * since the last drag (the 48 h 「新」 badge needs a clock). The value is a
- * DIFF against the default order; `resolveRelatedArrangement` in
- * `@object-ui/plugin-detail` lays it over the default. With no choice the
- * host passes `EMPTY_RELATED_ARRANGEMENT`: the default order, every card open.
+ * How the reader arranged the record page's related panels, per object
+ * (scope `object:OBJECT_NAME`, objectstack#27055, objectstack#27524):
+ * `{ v, order, hidden, basedOn }` — plus `seen`, the first-seen stamps of
+ * relationships new since the last drag (the 48 h 「新」 badge needs a clock).
+ * The value is a DIFF against the default order; `resolveRelatedArrangement`
+ * in `@object-ui/plugin-detail` lays it over the default. With no choice the
+ * host passes `EMPTY_RELATED_ARRANGEMENT`: the default order, every panel
+ * shown. A record of an earlier version (version 1 carried `collapsed`) is
+ * "no choice": no compatibility read.
  */
 export const RECORD_RELATED_ARRANGEMENT_PREFERENCE = defineWorkspacePreference<RelatedArrangement>({
   name: 'record.related.arrangement',
   codec: versionedPreferenceCodec<RelatedArrangement>({
-    version: 1,
+    version: RELATED_ARRANGEMENT_RECORD_VERSION,
     toRecord: relatedArrangementToRecord,
     fromRecord: relatedArrangementFromRecord,
   }),
 
@@ -1490,19 +1490,25 @@ const ar = {
     owner: "المالك",
     relatedCardMenu: "المزيد لـ {{title}}",
     relatedCardEnlarge: "تكبير",
-    relatedCardMoveUp: "نقل لأعلى",
-    relatedCardMoveDown: "نقل لأسفل",
     relatedCardExpand: "توسيع",
-    relatedCardCollapse: "طي",
     relatedCardHide: "إخفاء",
     relatedCardNew: "جديد",
-    relatedCardCount: "السجلات: {{count}} · تكبير",
-    relatedCardCount_zero: "السجلات: {{count}} · تكبير",
-    relatedCardCount_one: "السجلات: {{count}} · تكبير",
-    relatedCardCount_two: "السجلات: {{count}} · تكبير",
-    relatedCardCount_few: "السجلات: {{count}} · تكبير",
-    relatedCardCount_many: "السجلات: {{count}} · تكبير",
-    relatedCardCount_other: "السجلات: {{count}} · تكبير",
+    relatedPanelViewAll: "عرض الكل ({{count}})",
+    relatedPanelViewAll_zero: "عرض الكل ({{count}})",
+    relatedPanelViewAll_one: "عرض الكل ({{count}})",
+    relatedPanelViewAll_two: "عرض الكل ({{count}})",
+    relatedPanelViewAll_few: "عرض الكل ({{count}})",
+    relatedPanelViewAll_many: "عرض الكل ({{count}})",
+    relatedPanelViewAll_other: "عرض الكل ({{count}})",
+    relatedPanelReorder: "نقل {{title}}",
+    relatedPanelReorderHint: "اسحب لإعادة الترتيب · ⌥↑ ⌥↓",
+    relatedEmptyFold: "قوائم فارغة أخرى: {{count}}",
+    relatedEmptyFold_zero: "قوائم فارغة أخرى: {{count}}",
+    relatedEmptyFold_one: "قوائم فارغة أخرى: {{count}}",
+    relatedEmptyFold_two: "قوائم فارغة أخرى: {{count}}",
+    relatedEmptyFold_few: "قوائم فارغة أخرى: {{count}}",
+    relatedEmptyFold_many: "قوائم فارغة أخرى: {{count}}",
+    relatedEmptyFold_other: "قوائم فارغة أخرى: {{count}}",
     relatedDefaultChanged: "تم تحديث الترتيب الافتراضي",
     relatedRestoreDefault: "استعادة الافتراضي",
     relatedRestoreDefaultOrder: "استعادة الترتيب الافتراضي",
 
@@ -1332,15 +1332,17 @@ const de = {
     owner: "Inhaber",
     relatedCardMenu: "Mehr für {{title}}",
     relatedCardEnlarge: "Vergrößern",
-    relatedCardMoveUp: "Nach oben",
-    relatedCardMoveDown: "Nach unten",
     relatedCardExpand: "Aufklappen",
-    relatedCardCollapse: "Zuklappen",
     relatedCardHide: "Ausblenden",
     relatedCardNew: "Neu",
-    relatedCardCount: "{{count}} Datensätze – vergrößern",
-    relatedCardCount_one: "{{count}} Datensatz – vergrößern",
-    relatedCardCount_other: "{{count}} Datensätze – vergrößern",
+    relatedPanelViewAll: "Alle {{count}} anzeigen",
+    relatedPanelViewAll_one: "Alle {{count}} anzeigen",
+    relatedPanelViewAll_other: "Alle {{count}} anzeigen",
+    relatedPanelReorder: "{{title}} verschieben",
+    relatedPanelReorderHint: "Zum Sortieren ziehen · ⌥↑ ⌥↓",
+    relatedEmptyFold: "{{count}} weitere leere Listen",
+    relatedEmptyFold_one: "{{count}} weitere leere Liste",
+    relatedEmptyFold_other: "{{count}} weitere leere Listen",
     relatedDefaultChanged: "Standardreihenfolge aktualisiert",
     relatedRestoreDefault: "Standard wiederherstellen",
     relatedRestoreDefaultOrder: "Standardreihenfolge wiederherstellen",
 
@@ -1520,15 +1520,17 @@ const en = {
     owner: 'Owner',
     relatedCardMenu: 'More for {{title}}',
     relatedCardEnlarge: 'Enlarge',
-    relatedCardMoveUp: 'Move up',
-    relatedCardMoveDown: 'Move down',
     relatedCardExpand: 'Expand',
-    relatedCardCollapse: 'Collapse',
     relatedCardHide: 'Hide',
     relatedCardNew: 'New',
-    relatedCardCount: '{{count}} records — enlarge',
-    relatedCardCount_one: '{{count}} record — enlarge',
-    relatedCardCount_other: '{{count}} records — enlarge',
+    relatedPanelViewAll: 'View all {{count}}',
+    relatedPanelViewAll_one: 'View all {{count}}',
+    relatedPanelViewAll_other: 'View all {{count}}',
+    relatedPanelReorder: 'Reorder {{title}}',
+    relatedPanelReorderHint: 'Drag to reorder · ⌥↑ ⌥↓',
+    relatedEmptyFold: '{{count}} more empty lists',
+    relatedEmptyFold_one: '{{count}} more empty list',
+    relatedEmptyFold_other: '{{count}} more empty lists',
     relatedDefaultChanged: 'Default order updated',
     relatedRestoreDefault: 'Restore default',
     relatedRestoreDefaultOrder: 'Restore default order',
 
@@ -1373,16 +1373,19 @@ const es = {
     owner: "Propietario",
     relatedCardMenu: "Más opciones de {{title}}",
     relatedCardEnlarge: "Ampliar",
-    relatedCardMoveUp: "Subir",
-    relatedCardMoveDown: "Bajar",
     relatedCardExpand: "Desplegar",
-    relatedCardCollapse: "Contraer",
     relatedCardHide: "Ocultar",
     relatedCardNew: "Nuevo",
-    relatedCardCount: "{{count}} registros · ampliar",
-    relatedCardCount_one: "{{count}} registro · ampliar",
-    relatedCardCount_many: "{{count}} de registros · ampliar",
-    relatedCardCount_other: "{{count}} registros · ampliar",
+    relatedPanelViewAll: "Ver todos ({{count}})",
+    relatedPanelViewAll_one: "Ver todos ({{count}})",
+    relatedPanelViewAll_many: "Ver todos ({{count}})",
+    relatedPanelViewAll_other: "Ver todos ({{count}})",
+    relatedPanelReorder: "Mover {{title}}",
+    relatedPanelReorderHint: "Arrastra para reordenar · ⌥↑ ⌥↓",
+    relatedEmptyFold: "{{count}} listas vacías más",
+    relatedEmptyFold_one: "{{count}} lista vacía más",
+    relatedEmptyFold_many: "{{count}} listas vacías más",
+    relatedEmptyFold_other: "{{count}} listas vacías más",
     relatedDefaultChanged: "Orden predeterminado actualizado",
     relatedRestoreDefault: "Restaurar predeterminado",
     relatedRestoreDefaultOrder: "Restaurar orden predeterminado",
 
@@ -1370,16 +1370,19 @@ const fr = {
     owner: "Propriétaire",
     relatedCardMenu: "Plus pour {{title}}",
     relatedCardEnlarge: "Agrandir",
-    relatedCardMoveUp: "Monter",
-    relatedCardMoveDown: "Descendre",
     relatedCardExpand: "Déplier",
-    relatedCardCollapse: "Replier",
     relatedCardHide: "Masquer",
     relatedCardNew: "Nouveau",
-    relatedCardCount: "{{count}} enregistrements · agrandir",
-    relatedCardCount_one: "{{count}} enregistrement · agrandir",
-    relatedCardCount_many: "{{count}} enregistrements · agrandir",
-    relatedCardCount_other: "{{count}} enregistrements · agrandir",
+    relatedPanelViewAll: "Tout voir ({{count}})",
+    relatedPanelViewAll_one: "Tout voir ({{count}})",
+    relatedPanelViewAll_many: "Tout voir ({{count}})",
+    relatedPanelViewAll_other: "Tout voir ({{count}})",
+    relatedPanelReorder: "Déplacer {{title}}",
+    relatedPanelReorderHint: "Glisser pour réordonner · ⌥↑ ⌥↓",
+    relatedEmptyFold: "{{count}} autres listes vides",
+    relatedEmptyFold_one: "{{count}} autre liste vide",
+    relatedEmptyFold_many: "{{count}} autres listes vides",
+    relatedEmptyFold_other: "{{count}} autres listes vides",
     relatedDefaultChanged: "Ordre par défaut mis à jour",
     relatedRestoreDefault: "Rétablir par défaut",
     relatedRestoreDefaultOrder: "Rétablir l'ordre par défaut",
 
@@ -1175,15 +1175,17 @@ const ja = {
     owner: "所有者",
     relatedCardMenu: "{{title}} のその他の操作",
     relatedCardEnlarge: "拡大",
-    relatedCardMoveUp: "上へ移動",
-    relatedCardMoveDown: "下へ移動",
     relatedCardExpand: "展開",
-    relatedCardCollapse: "折りたたむ",
     relatedCardHide: "非表示",
     relatedCardNew: "新規",
-    relatedCardCount: "{{count}} 件 · 拡大",
-    relatedCardCount_one: "{{count}} 件 · 拡大",
-    relatedCardCount_other: "{{count}} 件 · 拡大",
+    relatedPanelViewAll: "{{count}} 件をすべて表示",
+    relatedPanelViewAll_one: "{{count}} 件をすべて表示",
+    relatedPanelViewAll_other: "{{count}} 件をすべて表示",
+    relatedPanelReorder: "{{title}} を並べ替え",
+    relatedPanelReorderHint: "ドラッグで並べ替え · ⌥↑ ⌥↓",
+    relatedEmptyFold: "空の関連 {{count}} 件",
+    relatedEmptyFold_one: "空の関連 {{count}} 件",
+    relatedEmptyFold_other: "空の関連 {{count}} 件",
     relatedDefaultChanged: "既定の順序が更新されました",
     relatedRestoreDefault: "既定に戻す",
     relatedRestoreDefaultOrder: "既定の順序に戻す",
 
@@ -1332,15 +1332,17 @@ const ko = {
     owner: "소유자",
     relatedCardMenu: "{{title}} 추가 작업",
     relatedCardEnlarge: "확대",
-    relatedCardMoveUp: "위로 이동",
-    relatedCardMoveDown: "아래로 이동",
     relatedCardExpand: "펼치기",
-    relatedCardCollapse: "접기",
     relatedCardHide: "숨기기",
     relatedCardNew: "새 항목",
-    relatedCardCount: "{{count}}개 레코드 · 확대",
-    relatedCardCount_one: "{{count}}개 레코드 · 확대",
-    relatedCardCount_other: "{{count}}개 레코드 · 확대",
+    relatedPanelViewAll: "{{count}}개 모두 보기",
+    relatedPanelViewAll_one: "{{count}}개 모두 보기",
+    relatedPanelViewAll_other: "{{count}}개 모두 보기",
+    relatedPanelReorder: "{{title}} 순서 변경",
+    relatedPanelReorderHint: "드래그하여 순서 변경 · ⌥↑ ⌥↓",
+    relatedEmptyFold: "빈 관련 항목 {{count}}개",
+    relatedEmptyFold_one: "빈 관련 항목 {{count}}개",
+    relatedEmptyFold_other: "빈 관련 항목 {{count}}개",
     relatedDefaultChanged: "기본 순서가 업데이트됨",
     relatedRestoreDefault: "기본값 복원",
     relatedRestoreDefaultOrder: "기본 순서 복원",