@@ -0,0 +1,10 @@
+---
+'@object-ui/i18n': patch
+---
+
+feat(i18n): the translation preview's strings move into the `studio` namespace
+
+Clause-②: no
+Metadata-protocol: none
+
+- **Last rows of the move ruled on objectstack#25922** (6431032267, Q2 = A; kept by 6431234244). The 23 `engine.translationPreview.*` rows in each language, the last family left in `@object-ui/app-shell`'s private designer table, now live in `@object-ui/i18n/namespaces/studio`, text unchanged. The table is now empty; deleting it is a later slice. Studio reads the same strings; a Chinese viewer sees the translation preview's labels in English for the moment the `zh` catalogue takes to load, as with the earlier slices. No export changes.
@@ -192,57 +192,13 @@ const DOMAIN_LABELS_ZH: Record<string, string> = {
 };
 
 const ENGINE_STRINGS_EN: Record<string, string> = {
-  'engine.translationPreview.empty':
-    'This bundle is empty — add at least one translated string to see the coverage report.',
-  // One heading per group of the per-app `TranslationDataSchema`, in its order (objectui#11765).
-  'engine.translationPreview.category.objects': 'Objects',
-  'engine.translationPreview.category.picklists': 'Picklists',
-  'engine.translationPreview.category.apps': 'Apps',
-  'engine.translationPreview.category.messages': 'Messages',
-  'engine.translationPreview.category.globalActions': 'Global Actions',
-  'engine.translationPreview.category.dashboards': 'Dashboards',
-  'engine.translationPreview.category.datasets': 'Datasets',
-  'engine.translationPreview.category.reports': 'Reports',
-  'engine.translationPreview.category.pages': 'Pages',
-  'engine.translationPreview.category.flows': 'Flows',
-  'engine.translationPreview.category.hooks': 'Hooks',
-  'engine.translationPreview.category.positions': 'Positions',
-  'engine.translationPreview.category.permissions': 'Permission Sets',
-  'engine.translationPreview.category.books': 'Doc Books',
-  'engine.translationPreview.category.metadataForms': 'Metadata Forms',
-  'engine.translationPreview.category.settingsCommon': 'Settings UI',
-  'engine.translationPreview.coverage': 'Category coverage:',
-  'engine.translationPreview.totalKeys': '{count} total keys',
-  'engine.translationPreview.categoryEmpty': 'empty',
-  'engine.translationPreview.more': '+{count} more…',
-  'engine.translationPreview.keyCountOne': '{{count} key}',
-  'engine.translationPreview.keyCountOther': '{{count} keys}',
+  // Empty since #25922 slice S6b: every row lives in `@object-ui/i18n`'s
+  // `studio` namespace. Kept until slice S7 retires the table.
 };
 
 const ENGINE_STRINGS_ZH: Record<string, string> = {
-  'engine.translationPreview.empty': '此语言包为空 —— 至少添加一条译文，即可查看覆盖率报告。',
-  'engine.translationPreview.category.objects': '对象',
-  'engine.translationPreview.category.picklists': '选项列表',
-  'engine.translationPreview.category.apps': '应用',
-  'engine.translationPreview.category.messages': '消息',
-  'engine.translationPreview.category.globalActions': '全局操作',
-  'engine.translationPreview.category.dashboards': '仪表盘',
-  'engine.translationPreview.category.datasets': '数据集',
-  'engine.translationPreview.category.reports': '报表',
-  'engine.translationPreview.category.pages': '页面',
-  'engine.translationPreview.category.flows': '流程',
-  'engine.translationPreview.category.hooks': '钩子',
-  'engine.translationPreview.category.positions': '岗位',
-  'engine.translationPreview.category.permissions': '权限集',
-  'engine.translationPreview.category.books': '文档书',
-  'engine.translationPreview.category.metadataForms': '元数据表单',
-  'engine.translationPreview.category.settingsCommon': '设置界面',
-  'engine.translationPreview.coverage': '分类覆盖率：',
-  'engine.translationPreview.totalKeys': '共 {count} 个键',
-  'engine.translationPreview.categoryEmpty': '空',
-  'engine.translationPreview.more': '另有 {count} 项…',
-  'engine.translationPreview.keyCountOne': '{{count} 个键}',
-  'engine.translationPreview.keyCountOther': '{{count} 个键}',
+  // Empty since #25922 slice S6b: every row lives in `@object-ui/i18n`'s
+  // `studio` namespace. Kept until slice S7 retires the table.
 };
 
 /** Whether a locale resolves to Chinese (the only non-English catalog). */
 
@@ -1,11 +1,12 @@
 // Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
 
 /**
- * objectstack#25922 slices S2 to S6 — the designer rows that moved into
+ * objectstack#25922 slices S2 to S6b — the designer rows that moved into
  * `@object-ui/i18n`'s `studio` namespace (every `engine.inspector.*` row;
  * `engine.packages.*`, `engine.form.*`, `engine.edit.*`; all of
  * `engine.studio.*`; the data source pages, the field types, the metadata
- * preview panes, the flow designer and the rest of the Studio chrome), and
+ * preview panes, the flow designer, the rest of the Studio chrome and, last,
+ * the translation preview), and
  * app-shell's `t()` / `tOptional()` still answer every one of them the way they
  * did when the rows sat in its own table.
  *
@@ -124,6 +125,8 @@ const FAMILY_FLOOR: Readonly<Record<string, number>> = Object.freeze({
   'engine.home.': 1,
   'engine.cancel': 1,
   'engine.close': 1,
+  // S6b — the translation preview, the table's last family
+  'engine.translationPreview.': 20,
 });
 
 /**
 
@@ -673,17 +673,18 @@ function pageBlockKeys(table: EngineStringTable): string[] {
 }
 
 describe('a retired key leaves BOTH locale tables (objectui#8368)', () => {
-  it('reads two disjoint, non-empty tables out of i18n.ts', () => {
+  it('reads two disjoint tables out of i18n.ts, both emptied into the namespace', () => {
     // The extractor is a source parser, so its silent failure mode is finding
     // FEWER keys — which would make every assertion below vacuously green over
     // an empty corpus. Ranges first: overlapping ones would mean the `};`
     // scan ran past a table and both sets became the same set.
-    // The table drains slice by slice into the namespace (objectstack#25922),
-    // so its floor is "non-empty"; the 3,000-key floor is held over both homes
-    // together, below.
+    // The table drained slice by slice into the namespace (objectstack#25922)
+    // and is empty since slice S6b: a key back in it would shadow the
+    // namespace's copy. The 3,000-key floor, held over both homes together
+    // below, is what keeps an empty table from reading as a parser gone quiet.
     expect(EN_TABLE.to).toBeLessThan(ZH_TABLE.from);
-    expect(EN_TABLE.keys.length).toBeGreaterThan(0);
-    expect(ZH_TABLE.keys.length).toBeGreaterThan(0);
+    expect(EN_TABLE.keys).toEqual([]);
+    expect(ZH_TABLE.keys).toEqual([]);
     // No duplicates: a key declared twice would be a silent overwrite, and the
     // set arithmetic below would hide it.
     expect(EN_TABLE.keys.length).toBe(new Set(EN_TABLE.keys).size);
 
@@ -3953,6 +3953,33 @@ const STUDIO_EN: Record<string, string> = {
   'engine.appNav.item': 'Item {n}',
   'engine.appNav.itemOne': 'item',
   'engine.appNav.itemOther': 'items',
+  // The translation preview, the designer table's last family: held out of S6
+  // while a sibling change added its category.hooks row (#25922 slice S6b).
+  'engine.translationPreview.empty':
+    'This bundle is empty — add at least one translated string to see the coverage report.',
+  // One heading per group of the per-app `TranslationDataSchema`, in its order (objectui#11765).
+  'engine.translationPreview.category.objects': 'Objects',
+  'engine.translationPreview.category.picklists': 'Picklists',
+  'engine.translationPreview.category.apps': 'Apps',
+  'engine.translationPreview.category.messages': 'Messages',
+  'engine.translationPreview.category.globalActions': 'Global Actions',
+  'engine.translationPreview.category.dashboards': 'Dashboards',
+  'engine.translationPreview.category.datasets': 'Datasets',
+  'engine.translationPreview.category.reports': 'Reports',
+  'engine.translationPreview.category.pages': 'Pages',
+  'engine.translationPreview.category.flows': 'Flows',
+  'engine.translationPreview.category.hooks': 'Hooks',
+  'engine.translationPreview.category.positions': 'Positions',
+  'engine.translationPreview.category.permissions': 'Permission Sets',
+  'engine.translationPreview.category.books': 'Doc Books',
+  'engine.translationPreview.category.metadataForms': 'Metadata Forms',
+  'engine.translationPreview.category.settingsCommon': 'Settings UI',
+  'engine.translationPreview.coverage': 'Category coverage:',
+  'engine.translationPreview.totalKeys': '{count} total keys',
+  'engine.translationPreview.categoryEmpty': 'empty',
+  'engine.translationPreview.more': '+{count} more…',
+  'engine.translationPreview.keyCountOne': '{{count} key}',
+  'engine.translationPreview.keyCountOther': '{{count} keys}',
 };
 
 export default STUDIO_EN;
@@ -3565,6 +3565,31 @@ const STUDIO_ZH: Record<string, string> = {
   'engine.appNav.item': '导航项 {n}',
   'engine.appNav.itemOne': '项',
   'engine.appNav.itemOther': '项',
+  // The translation preview, the designer table's last family: held out of S6
+  // while a sibling change added its category.hooks row (#25922 slice S6b).
+  'engine.translationPreview.empty': '此语言包为空 —— 至少添加一条译文，即可查看覆盖率报告。',
+  'engine.translationPreview.category.objects': '对象',
+  'engine.translationPreview.category.picklists': '选项列表',
+  'engine.translationPreview.category.apps': '应用',
+  'engine.translationPreview.category.messages': '消息',
+  'engine.translationPreview.category.globalActions': '全局操作',
+  'engine.translationPreview.category.dashboards': '仪表盘',
+  'engine.translationPreview.category.datasets': '数据集',
+  'engine.translationPreview.category.reports': '报表',
+  'engine.translationPreview.category.pages': '页面',
+  'engine.translationPreview.category.flows': '流程',
+  'engine.translationPreview.category.hooks': '钩子',
+  'engine.translationPreview.category.positions': '岗位',
+  'engine.translationPreview.category.permissions': '权限集',
+  'engine.translationPreview.category.books': '文档书',
+  'engine.translationPreview.category.metadataForms': '元数据表单',
+  'engine.translationPreview.category.settingsCommon': '设置界面',
+  'engine.translationPreview.coverage': '分类覆盖率：',
+  'engine.translationPreview.totalKeys': '共 {count} 个键',
+  'engine.translationPreview.categoryEmpty': '空',
+  'engine.translationPreview.more': '另有 {count} 项…',
+  'engine.translationPreview.keyCountOne': '{{count} 个键}',
+  'engine.translationPreview.keyCountOther': '{{count} 个键}',
 };
 
 export default STUDIO_ZH;