build(android): migrate to AGP 9.3 keep rules

app/build.gradle.kts

@@ -1,4 +1,5 @@
 // START Non-FOSS component
+import com.google.firebase.crashlytics.buildtools.gradle.CrashlyticsExtension
 import com.google.firebase.crashlytics.buildtools.gradle.CrashlyticsPlugin
 // END Non-FOSS component
 import com.google.gms.googleservices.GoogleServicesPlugin
@@ -73,12 +74,17 @@ android {
             }
         }
         release {
-            isMinifyEnabled = true
-            isShrinkResources = true
-            proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"),
-                "proguard-rules.pro",
-            )
+            optimization {
+                enable = true
+            }
+            // START Non-FOSS component
+            if (project.file("google-services.json").exists()) {
+                configure<CrashlyticsExtension> {
+                    // Crashlytics 3.0.8 still detects the legacy minify flag.
+                    mappingFileUploadEnabled = true
+                }
+            }
+            // END Non-FOSS component
             if (hasSigningProps) {
                 signingConfig = signingConfigs.getByName("flare")
             } else {
@@ -245,4 +251,3 @@ kotlin {
         }
     }
 }
-

app/src/main/keepRules/app.keep

@@ -0,0 +1,22 @@
+# Temporary compatibility workaround for Ktorfit 2.7.5.
+# ktorfit-lib-light-android omits the rule bundled in the JVM artifact, which
+# allows R8 to break the generic type data consumed by response converters.
+# Re-evaluate after upgrading to an Android artifact that bundles the rule.
+-keep class de.jensklingenberg.ktorfit.** { *; }
+
+# Temporary compatibility workaround for nostr-sdk-kmp 0.44.8.
+# Its published Android consumer rule targets rust.nostr.*, while the generated
+# UniFFI/JNA bindings are in rust.nostr.sdk. Re-evaluate after upgrading it or
+# validating that the narrower JNA boundary rules are sufficient in release.
+-keep class rust.nostr.sdk.** { *; }
+
+# Optional JVM management APIs are not available on Android. Keep these
+# suppressions until a clean optimized release succeeds without them.
+-dontwarn java.lang.management.**
+-dontwarn javax.management.**
+
+# Intentional optimizer assumption: force link-buffer composer on in release.
+# Remove this rule if the project should follow Compose runtime's default.
+-assumevalues public class androidx.compose.runtime.ComposeRuntimeFlags {
+    static boolean isLinkBufferComposerEnabled return true;
+}

build-logic/build.gradle.kts

@@ -10,7 +10,7 @@ repositories {
 }
 
 dependencies {
-    compileOnly("com.android.tools.build:gradle:9.3.1")
+    compileOnly("com.android.tools.build:gradle:9.3.2")
     compileOnly("org.jetbrains.kotlin:kotlin-gradle-plugin:2.4.10")
     implementation("org.jlleitschuh.gradle:ktlint-gradle:14.2.0")
 }