Scaffold native Android build and enforce Rust boundaries (#89)

android/gradle/gradle-daemon-jvm.properties

@@ -0,0 +1,2 @@
+# Require an installed JDK; never download a substitute daemon runtime.
+toolchainVersion=25

android/gradle/libs.versions.toml

@@ -0,0 +1,48 @@
+[versions]
+agp = "9.4.1"
+kotlin = "2.4.20"
+ksp = "2.3.12"
+hilt = "2.60.1"
+compose = "2026.09.00"
+adaptive = "1.3.0"
+activity = "1.13.0"
+lifecycle = "2.11.0"
+navigation = "1.2.0"
+coroutines = "1.11.0"
+junit = "4.13.2"
+androidTest = "1.7.0"
+espresso = "3.7.0"
+ktlintPlugin = "14.2.0"
+ktlint = "1.7.1"
+compileSdk = "37"
+minSdk = "26"
+ndk = "30.0.16248370"
+
+[libraries]
+compose-bom = { module = "androidx.compose:compose-bom", version.ref = "compose" }
+compose-ui = { module = "androidx.compose.ui:ui" }
+compose-material3 = { module = "androidx.compose.material3:material3" }
+compose-adaptive = { module = "androidx.compose.material3.adaptive:adaptive", version.ref = "adaptive" }
+compose-ui-test = { module = "androidx.compose.ui:ui-test-junit4" }
+compose-ui-test-manifest = { module = "androidx.compose.ui:ui-test-manifest" }
+activity-compose = { module = "androidx.activity:activity-compose", version.ref = "activity" }
+lifecycle-compose = { module = "androidx.lifecycle:lifecycle-runtime-compose", version.ref = "lifecycle" }
+lifecycle-viewmodel = { module = "androidx.lifecycle:lifecycle-viewmodel-compose", version.ref = "lifecycle" }
+navigation-runtime = { module = "androidx.navigation3:navigation3-runtime", version.ref = "navigation" }
+navigation-ui = { module = "androidx.navigation3:navigation3-ui", version.ref = "navigation" }
+coroutines-android = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-android", version.ref = "coroutines" }
+coroutines-test = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-test", version.ref = "coroutines" }
+hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt" }
+hilt-compiler = { module = "com.google.dagger:hilt-compiler", version.ref = "hilt" }
+junit = { module = "junit:junit", version.ref = "junit" }
+android-test-runner = { module = "androidx.test:runner", version.ref = "androidTest" }
+android-test-espresso = { module = "androidx.test.espresso:espresso-core", version.ref = "espresso" }
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+android-library = { id = "com.android.library", version.ref = "agp" }
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }
+ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
+ktlint = { id = "org.jlleitschuh.gradle.ktlint", version.ref = "ktlintPlugin" }

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,10 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionSha256Sum=dce76f55f8e251a3a1f130eb120f30b3d271de2b76c9b0729d316b5a1b6dc01f
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.8.1-bin.zip
+networkTimeout=10000
+retries=0
+retryBackOffMs=500
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists