Replace lande with native language detection (#9974)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: DS Boyce <260543580+ds-boyce@users.noreply.github.com>
Co-authored-by: Eric Bailey <git@esb.lol>

jest/jestSetup.js

@@ -61,9 +61,13 @@ jest.mock('expo-media-library', () => ({
   usePermissions: jest.fn(() => [true]),
 }))
 
-jest.mock('lande', () => ({
-  __esModule: true, // this property makes it work
-  default: jest.fn().mockReturnValue([['eng']]),
+jest.mock('@bsky.app/expo-guess-language', () => ({
+  guessLanguageSync: jest
+    .fn()
+    .mockReturnValue([{language: 'en', confidence: 1}]),
+  guessLanguageAsync: jest
+    .fn()
+    .mockResolvedValue([{language: 'en', confidence: 1}]),
 }))
 
 jest.mock('sentry-expo', () => ({