All notable changes to this project, grouped by development period.
- Added Firebase Cloud Messaging (FCM): token refresh handling, tap handlers, platform intent/scheme updates, and permission request moved to the login flow with topic subscription.
- Added Crashlytics integration.
- Refactored app initialization and added Learn category filters.
- Added new app icons (Android adaptive launcher + iOS), bumped iOS deployment target to 16.0, and updated Android toolchain/NDK/app version.
- Temporarily disabled Facebook SSO on the sign-in screen; increased Gradle heap and added iOS GIDClientID.
