fix(android): enable edge-to-edge for Android 15 / API 35 compliance

android/README.md

@@ -52,6 +52,20 @@ flutter pub run flutter_launcher_icons
 
 Or manually create PNG icons in each mipmap density folder (mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi).
 
+## Edge-to-Edge Display (Android 15 / API 35)
+
+From Android 15, apps targeting SDK 35 have edge-to-edge display enforced by default. This means app content draws behind the system bars (status bar and navigation bar).
+
+### What was done
+
+`MainActivity.kt` overrides `onCreate` and calls `enableEdgeToEdge()` before `super.onCreate()`. This:
+
+- Satisfies Google Play's edge-to-edge requirement for apps targeting API 35
+- Makes system bars transparent and allows content to draw behind them
+- Provides backward compatibility for Android 9–14 devices
+
+Flutter's `Scaffold`, `AppBar`, and `NavigationBar` widgets already handle window insets automatically via `MediaQuery`, so no Flutter-side UI changes were needed.
+
 ## Building for Android
 
 To build the Android app:

android/app/src/main/kotlin/ralcock/cbf/MainActivity.kt

@@ -1,5 +1,17 @@
 package ralcock.cbf
 
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
 import io.flutter.embedding.android.FlutterActivity
 
-class MainActivity: FlutterActivity()
+class MainActivity : FlutterActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        // Enable edge-to-edge display for Android 15+ (API 35) compatibility.
+        // This ensures system bars are transparent and content draws behind them,
+        // satisfying Android 15's mandatory edge-to-edge enforcement. Calling this
+        // before super.onCreate() also provides backward compatibility on Android 9–14.
+        // Flutter's Scaffold/AppBar/NavigationBar handle window insets automatically.
+        enableEdgeToEdge()
+        super.onCreate(savedInstanceState)
+    }
+}