Birthday Calendar Mobile/Desktop Package

The app source lives in /projects/birthday-calendar-mobile.

Included capabilities:
- Flutter app for Android, iOS, Windows, macOS, and Linux.
- Controlled WebView per provider.
- Facebook DOM extraction happens locally.
- Snapchat Web friend birthday capture happens locally by hooking fetch/XHR for /ami/friends.
- No extra forwarded ports are required for the app itself.

Build machine requirements:
- Flutter SDK
- Android Studio/Android SDK for Android builds
- Xcode/macOS for iOS builds
- Visual Studio Build Tools for Windows builds
- Linux desktop Flutter deps for Linux builds

Native app binaries should be produced on the target platform build machine.