# Files

- [Application state and event handling](app-state.md) - How the App struct in src/app.rs holds UI state, routes AppEvent values, handles keys, ingests messages and runs background tasks.
- [Runtime and event loop](runtime-and-event-loop.md) - Process startup in src/main.rs, the tokio runtime, the two event channels, the input thread, the WhatsApp forwarder and the draw/recv TUI loop.
- [Terminal UI rendering](terminal-ui.md) - How src/ui.rs draws the connecting, QR pairing and main screens with ratatui, including message formatting, wrapping, the input box and the footer.