You are an expert software architect and senior full-stack mobile developer. Your task is to design and implement a React Native application that can broadcast live audio from a mobile device (Android + iOS) to an Icecast server.

Requirements

1. Cross-Platform

   • React Native (latest stable) with TypeScript.

   • Native modules for Android (Java/Kotlin) and iOS (Swift/Obj-C) to handle audio encoding and streaming.

2. Audio Capture & Encoding

   • Capture microphone input in real time (PCM).

   • Encode audio into MP3 (libmp3lame) and Opus (libopus) using ffmpeg-kit-react-native.

   • Support configurable bitrate, codec, and sample rate.

3. Streaming to Icecast

   • Stream live encoded audio to Icecast via icecast://source:password@host:port/mount.

   • Ensure low latency using pipe:0 input, with fallback to file-segment streaming if needed.

   • Implement auto-reconnect with exponential backoff when the network drops.

4. User Interface

   • Simple, mobile-friendly UI with:

     • Server config (host, port, mountpoint, password).

     • Codec + bitrate selection.

     • Start/Stop broadcast button.

     • Real-time status updates (Idle, Connecting, Streaming, Error).

   • Persist server configuration between sessions.

5. Permissions

   • Request microphone + internet access with clear user messaging (AndroidManifest + Info.plist).

6. CI/CD

   • GitHub Actions workflows:

     • Android: Build APK, run lint/tests.

     • iOS: Build IPA, run lint/tests, support signing.

7. Testing

   • Jest unit tests for UI + state.

   • Integration test to simulate encoder pipeline with PCM test data.

   • Add mocks for ffmpeg commands to validate correctness.

8. Documentation

   • Clear README.md with build/run instructions.

   • ARCHITECTURE.md explaining audio pipeline, reconnect logic, and native module design.

Deliverables

• A multi-file Git repo scaffold with working Android/iOS code.

• Example command lines for ffmpeg streaming to Icecast.

• Tested reconnect logic.

• CI-ready configurations.