perf(android): trim platform assets and release Dart symbols

README.md

@@ -84,8 +84,10 @@ installation must be regenerated with that setting.
 
 Android release builds, including plain `flutter build apk --release`, keep Dart
 debug data in `build/symbols/android/app.<architecture>.symbols` to reduce APK
-size without obfuscation. An explicit `--split-debug-info` path overrides this
-default; `--analyze-size` retains Flutter's normal behavior. Keep these symbols
+size. The release script also uses `--obfuscate` to shorten internal Dart names;
+when building directly, add `--obfuscate --split-debug-info=build/symbols/android`
+for the smaller APK. An explicit `--split-debug-info` path overrides the default;
+plain `--analyze-size` builds retain Flutter's normal behavior. Keep these symbols
 with the matching APK before another local build replaces them. Decode a trace
 with `flutter symbolize --debug-info=<symbols-file> --input=crash.txt`.
 

android/app/build.gradle.kts

@@ -173,6 +173,17 @@ val buildRustBackend = tasks.register<Exec>("buildRustBackend") {
 }
 tasks.named("preBuild").configure { dependsOn(buildRustBackend) }
 
+// Filter Android's copy only; keep shared bundles and mobile glass shaders intact.
+tasks.withType<org.gradle.api.tasks.Copy>().configureEach {
+    if (name.startsWith("copyFlutterAssets")) {
+        exclude(
+            "flutter_assets/packages/liquid_glass_easy/lib/assets/shaders/liquid_glass_desktop.frag",
+            "flutter_assets/packages/liquid_glass_easy/lib/assets/shaders/metaball_glass_desktop.frag",
+            "flutter_assets/packages/flutter_local_notifications_web/web/notifications_service_worker.js",
+        )
+    }
+}
+
 flutter {
     source = "../.."
 }

scripts/build_android.sh

@@ -94,6 +94,8 @@ fi
 BUILD_GIT_COMMIT="$(git rev-parse --short=8 HEAD)"
 "${FLUTTER_COMMAND[@]}" build apk \
   --release \
+  --obfuscate \
+  --split-debug-info "$PROJECT_DIR/build/symbols/android" \
   --split-per-abi \
   --target-platform "$TARGET_PLATFORM_LIST" \
   --dart-define="GIT_COMMIT=$BUILD_GIT_COMMIT" \