[guoxianzhe]

CSD-80336 requires a runnable Demo in addition to the SDK dependency update. Extend Expo → Advanced → CameraCapturerConfiguration with a local rear-camera preview flow that does not require joining a channel.

• Query SDK focal-length capabilities. If rear ultra-wide is advertised, configure it and display the actual CameraFocalLengthApplied / FallbackToDefault events.
• Otherwise query Camera2 CONTROL_ZOOM_RATIO_RANGE through a Demo-only Android bridge, select a rear camera exposing sub-1x zoom, configure that exact cameraId, and apply an in-range zoom once capture starts. This path does not wait for a focal-length callback; 1x/minimum buttons allow visual comparison.
• Distinguish unsupported devices, permission/API failures and accepted return codes. Invalidate pending native queries on Stop/unmount. Keep flow helpers outside Expo Router routes and include device verification instructions.

Validation on a3991e3:

• All 64 tests in 10 suites passed, including capability selection, real page callback handling and cancellation tests. The helper relocation was rechecked with the 10 affected tests.
• Full TypeScript and changed-file ESLint checks passed; lint/types/commitlint hooks passed on the final commit.
• Android/iOS new/old architecture builds all succeeded: https://github.com/AgoraIO-Extensions/react-native-agora/actions/runs/38746249170 . Six APK/IPA/dSYM artifacts verified non-empty and unexpired.
• Download: https://nightly.link/AgoraIO-Extensions/react-native-agora/actions/runs/38746249170

No connected physical Android device: actual ultra-wide/Pixel picture behavior remains unverified. This PR is not merged; no test notice or NPM publication has been submitted. Previous release Demo artifacts do not contain this change.