🐛 fix: sync NanoBanana regex to React Native model mapping

Address Codex review feedback on #347 — the RN package maintains its
own copy of modelMappings and was missed by the previous fix.

packages/react-native/src/features/modelConfig.ts

@@ -173,7 +173,7 @@ export const rnModelMappings: RNModelMapping[] = [
     keywords: [
       'gemini-3.1-flash-image-preview',
       'gemini-3-pro-image-preview',
-      'gemini-\\d+(?:\\.\\d+)?-(?:flash|pro)-image-preview$',
+      'gemini-\\d+(?:\\.\\d+)?-(?:flash(?:-lite)?|pro)-image(?:-preview)?',
       'nanobanana',
       'nano-banana',
     ],