Expand AITURK Turkish settings and desktop surfaces for beta 5

apps/desktop/src/app/settings/test-locale.tsx

@@ -0,0 +1,17 @@
+import { type RenderOptions, render as renderUi } from '@testing-library/react'
+import type { ReactNode } from 'react'
+
+import { I18nProvider } from '@/i18n/context'
+
+/** Component behavior fixtures use English explicitly; application-default
+ * and Turkish rendering are verified by the locale integration tests. */
+export function renderWithEnglish(ui: ReactNode, options?: RenderOptions) {
+  return renderUi(ui, {
+    wrapper: ({ children }) => (
+      <I18nProvider configClient={null} initialLocale="en">
+        {children}
+      </I18nProvider>
+    ),
+    ...options
+  })
+}