test(bare-rn): mock models registry so post-#1148 App.tsx renders

Author: msluszniak

apps/bare-rn/__mocks__/react-native-executorch.js

@@ -11,4 +11,12 @@ module.exports = {
     interrupt: jest.fn(),
   }),
   LLAMA3_2_1B_SPINQUANT: 'LLAMA3_2_1B_SPINQUANT',
+  // After PR #1148 (MODEL_REGISTRY) merged to main, App.tsx imports
+  // `models.<domain>.<modelName>()` instead of bare constants. Mock both
+  // shapes so the smoke test passes regardless of which API the merged
+  // tree happens to use.
+  models: new Proxy(
+    {},
+    { get: () => new Proxy({}, { get: () => () => ({}) }) }
+  ),
 };