@@ -0,0 +1,12 @@
+---
+'@object-ui/i18n': patch
+---
+
+feat(i18n): a lazy `studio` namespace for the Studio designer's strings; the `designer.*` and `perm.*` keys move into it
+
+Clause-②: no
+Metadata-protocol: none
+
+- **New subpath `@object-ui/i18n/namespaces/studio`.** The Studio designer's two-locale string set becomes a namespace of this package, as the maintainer ruled on objectstack#25922 (6431032267, Q2 = A; kept by 6431234244). `en` is resident; `zh` is its own chunk, fetched the first time a Chinese lookup asks for it; every other language reads `en`. Exports: `studioString(key, lang)` (synchronous; answers from `en` while a catalogue is in flight), `loadStudioCatalogue(lang)`, `isStudioCatalogueLoaded(lang)`, `resolveStudioLanguage(lang)`, the `useStudioCatalogue(lang)` hook (re-renders its caller when a fetched catalogue lands), `STUDIO_NAMESPACE`, `STUDIO_FALLBACK_LANGUAGE`, `STUDIO_LANGUAGE_CODES` and the `StudioCatalogue` type. Additive: nothing existing changes.
+- **First slice of the move.** Every key under `designer.*` and `perm.*` (the object/field designer and the permission designer) now lives in the namespace instead of `@object-ui/app-shell`'s private table. Studio reads the same text in `en` and `zh`; a Chinese viewer sees these labels in English for the moment the `zh` catalogue takes to load, and a non-Chinese viewer no longer downloads these keys' Chinese text with the console.
+- **Not in the eager catalogue.** `locales/en.ts` gains no key, and the namespace is not one of the ten packs, so `all-locales-key-parity` does not read it; its own parity (every `en` key has a `zh` row with the same `{placeholders}`) is a test of this package.
@@ -1156,6 +1156,18 @@ export default defineConfig({
             { name: 'i18n-locale-ru', test: /[\\/]packages[\\/]i18n[\\/]src[\\/]locales[\\/]ru\.ts$/, priority: 84 },
             { name: 'i18n-locale-ar', test: /[\\/]packages[\\/]i18n[\\/]src[\\/]locales[\\/]ar\.ts$/, priority: 84 },
             //
+            // The Studio designer's `studio` namespace (objectstack#25922): the
+            // same one-group-per-catalogue rule, for the same reason. Its `zh`
+            // catalogue is `import()`ed on demand by
+            // `packages/i18n/src/namespaces/studio/index.ts`; without a group of
+            // its own it would fall to `i18n-runtime` below, which is eager, and
+            // the laziness would be real in the source and absent in the bundle.
+            // `en` is the namespace's resident fallback and gets its own chunk so
+            // its bytes are named in `eager-closure.json` instead of hiding in
+            // the runtime's.
+            { name: 'i18n-ns-studio-en', test: /[\\/]packages[\\/]i18n[\\/]src[\\/]namespaces[\\/]studio[\\/]en\.ts$/, priority: 84 },
+            { name: 'i18n-ns-studio-zh', test: /[\\/]packages[\\/]i18n[\\/]src[\\/]namespaces[\\/]studio[\\/]zh\.ts$/, priority: 84 },
+            //
             // ⛔ `i18n-runtime` takes `includeDependenciesRecursively: false`
             // for the reason `data-adapter` below does (objectui#9345, read out
             // there in full): it outranks `framework` (83 over 80), and since
 
@@ -40,6 +40,11 @@ import { I18nProvider } from '@object-ui/i18n';
 import { t } from './i18n';
 import { __setCelFormulaLoader } from './celAuthoring';
 import { CelTestRunDialog } from './CelTestRunDialog';
+// The designer's `designer.*` / `perm.*` rows live in `@object-ui/i18n`'s `studio`
+// namespace, whose `zh` catalogue is fetched on demand (objectstack#25922).
+// Resident before any case, so the zh rows below read synchronously.
+import { loadStudioCatalogue } from '@object-ui/i18n/namespaces/studio';
+await loadStudioCatalogue('zh');
 
 afterEach(() => {
   cleanup();
 
@@ -161,6 +161,12 @@ vi.mock('./AssignedUsersSection', () => ({
 
 import { PermissionMatrixEditPage } from './PermissionMatrixEditor';
 
+// The designer's `designer.*` / `perm.*` rows live in `@object-ui/i18n`'s `studio`
+// namespace, whose `zh` catalogue is fetched on demand (objectstack#25922).
+// Resident before any case, so the zh rows below read synchronously.
+import { loadStudioCatalogue } from '@object-ui/i18n/namespaces/studio';
+await loadStudioCatalogue('zh');
+
 /* ── The door ────────────────────────────────────────────────────────────── */
 
 interface Call {
 
@@ -260,7 +260,7 @@ describe('References panel — error ≠ empty ≠ loading (#5110)', () => {
   /**
    * The designer table carries `en` and `zh` in one file and is deliberately
    * out of reach of the pack gates (see `metadata-admin/i18n.ts`'s header and
-   * `packages/i18n/README.md`, "Scope — the `engine.*` carve-out"), so a new
+   * `packages/i18n/README.md`, "Scope — the Studio designer strings"), so a new
    * key added to only one of the two tables fails nowhere. This is that file's
    * parity check for the three keys this card adds.
    *
Original file line number	Diff line number	Diff line change
`@@ -260,7 +260,7 @@ describe('References panel — error ≠ empty ≠ loading (#5110)', () => {`
`260`	`260`	`/**`
`261`	`261`	* The designer table carries `en` and `zh` in one file and is deliberately
`262`	`262`	* out of reach of the pack gates (see `metadata-admin/i18n.ts`'s header and
`263`		- * `packages/i18n/README.md`, "Scope — the `engine.*` carve-out"), so a new
	`263`	+ * `packages/i18n/README.md`, "Scope — the Studio designer strings"), so a new
`264`	`264`	`* key added to only one of the two tables fails nowhere. This is that file's`
`265`	`265`	`* parity check for the three keys this card adds.`
`266`	`266`	`*`