Shrink release APK 68% and fix broken release bundling

android/app/build.gradle

@@ -57,7 +57,7 @@ react {
 /**
  * Set this to true to Run Proguard on Release builds to minify the Java bytecode.
  */
-def enableProguardInReleaseBuilds = false
+def enableProguardInReleaseBuilds = true
 
 /**
  * The preferred build flavor of JavaScriptCore (JSC)
@@ -114,6 +114,7 @@ android {
             def hasReleaseKeystore = System.getenv('RELEASE_STORE_FILE') || project.findProperty('RELEASE_STORE_FILE')
             signingConfig hasReleaseKeystore ? signingConfigs.release : signingConfigs.debug
             minifyEnabled enableProguardInReleaseBuilds
+            shrinkResources enableProguardInReleaseBuilds
             proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
         }
     }

android/gradle.properties

@@ -25,7 +25,12 @@ android.useAndroidX=true
 # Use this property to specify which architecture you want to build.
 # You can also override it from the CLI using
 # ./gradlew <task> -PreactNativeArchitectures=x86_64
-reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
+# Ship arm64-v8a only. Every real target device (GrapheneOS/Pixels and modern
+# stock Android) is 64-bit ARM; x86/x86_64 are emulator-only and armeabi-v7a is
+# pre-2017 32-bit. This controls both which ABIs are compiled and which ship, so
+# it also cuts build time ~4x. To run a debug build on an x86_64 emulator,
+# override per-invocation: ./gradlew ... -PreactNativeArchitectures=x86_64
+reactNativeArchitectures=arm64-v8a
 
 # Use this property to enable support to the new architecture.
 # This will allow you to use TurboModules and the Fabric render in

babel.config.js

@@ -1,3 +1,7 @@
 module.exports = {
   presets: ['module:@react-native/babel-preset'],
+  // graphql v17 ships .mjs using `export * as Kind from ...` (export-namespace-from).
+  // The RN preset doesn't transform this, so release bundling fails without it.
+  // Debug builds serve JS from Metro and skip bundling, so CI never hit this.
+  plugins: ['@babel/plugin-transform-export-namespace-from'],
 };