build: update Gradle, AGP, and Kotlin versions

- Upgrade Gradle to 9.3.1 and AGP to 9.1.0.
- Upgrade Kotlin to 2.3.10 and KSP to 2.3.6.
- Simplify plugin declarations using new aliases for serialization and parcelize.
- Remove `androidx.multidex` dependency and migrate `SysctlGuiApp` to `Application`.
- Clean up redundant `sourceSets` and unused plugin applications.
- Update `gradle.properties` with new Android Gradle plugin flags.

Author: Lennoard

app/build.gradle.kts

@@ -2,12 +2,11 @@ import java.util.Properties
 
 plugins {
     alias(libs.plugins.android.application)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.kotlin.parcelize)
     alias(libs.plugins.ksp)
-    alias(libs.plugins.jetbrains.kotlin.serialization)
     alias(libs.plugins.stability.analyzer)
-    id("kotlin-parcelize")
 }
 
 android {
@@ -70,12 +69,6 @@ android {
         compose = true
     }
 
-    sourceSets {
-        maybeCreate("main").java.srcDir("src/main/kotlin")
-        // Adds exported schema location as test app assets.
-        getByName("androidTest").assets.srcDir("$projectDir/schemas")
-    }
-
     packaging {
         resources.excludes.addAll(
             arrayOf(
@@ -116,7 +109,6 @@ dependencies {
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.core.splashscreen)
     implementation(libs.androidx.glance.appwidget)
-    implementation(libs.androidx.multidex)
     implementation(libs.androidx.navigation.compose)
     implementation(libs.androidx.window)
     implementation(libs.androidx.work.runtime.ktx)

app/src/main/kotlin/com/androidvip/sysctlgui/SysctlGuiApp.kt

@@ -1,6 +1,6 @@
 package com.androidvip.sysctlgui
 
-import androidx.multidex.MultiDexApplication
+import android.app.Application
 import com.androidvip.sysctlgui.data.di.dataModules
 import com.androidvip.sysctlgui.di.presentationModule
 import com.androidvip.sysctlgui.domain.di.domainModule
@@ -10,7 +10,7 @@ import org.koin.android.ext.android.get
 import org.koin.android.ext.koin.androidContext
 import org.koin.core.context.startKoin
 
-class SysctlGuiApp : MultiDexApplication() {
+class SysctlGuiApp : Application() {
 
     override fun onCreate() {
         super.onCreate()

build.gradle.kts

@@ -1,10 +1,11 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
     alias(libs.plugins.android.application) apply false
-    alias(libs.plugins.kotlin.android) apply false
-    alias(libs.plugins.kotlin.compose) apply false
-    alias(libs.plugins.jetbrains.kotlin.jvm) apply false
     alias(libs.plugins.android.library) apply false
+    alias(libs.plugins.kotlin.jvm) apply false
+    alias(libs.plugins.kotlin.compose) apply false
+    alias(libs.plugins.kotlin.parcelize) apply false
+    alias(libs.plugins.kotlin.serialization) apply false
     alias(libs.plugins.ksp) apply false
     alias(libs.plugins.stability.analyzer) apply false
 }

common/design/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
 }
 
@@ -57,7 +56,7 @@ dependencies {
 
     api(libs.material)
 
-    androidTestApi(platform(libs.androidx.compose.bom))
+    androidTestImplementation(platform(libs.androidx.compose.bom))
 
     if (AppConfig.devCycle) {
         api(libs.androidx.compose.ui.tooling)

common/utils/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
 }
 
 android {

data/build.gradle.kts

@@ -1,7 +1,6 @@
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
-    alias(libs.plugins.jetbrains.kotlin.serialization)
+    alias(libs.plugins.kotlin.serialization)
     alias(libs.plugins.ksp)
 }
 
@@ -33,10 +32,6 @@ android {
         sourceCompatibility = JavaVersion.VERSION_21
         targetCompatibility = JavaVersion.VERSION_21
     }
-
-    sourceSets {
-        maybeCreate("main").java.srcDir("src/main/kotlin")
-    }
 }
 
 kotlin {

domain/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
     alias(libs.plugins.android.library)
-    alias(libs.plugins.kotlin.android)
 }
 
 android {

gradle.properties

@@ -21,4 +21,15 @@ kotlin.code.style=official
 # Configuration cache
 org.gradle.configuration-cache=true
 android.nonTransitiveRClass=true
-android.nonFinalResIds=false
+android.disallowKotlinSourceSets=false
+#android.nonFinalResIds=false
+#android.defaults.buildfeatures.resvalues=true
+#android.sdk.defaultTargetSdkToCompileSdkIfUnset=false
+#android.enableAppCompileTimeRClass=false
+#android.usesSdkInManifest.disallowed=false
+#android.uniquePackageNames=false
+#android.dependency.useConstraints=true
+#android.r8.strictFullModeForKeepRules=false
+#android.r8.optimizedResourceShrinking=false
+#android.builtInKotlin=false
+#android.newDsl=false

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 activityCompose = "1.11.0"
-agp = "8.12.0"
+agp = "9.1.0"
 appcompat = "1.7.1"
 composeAnimationGraphics = "1.10.0"
 composeBom = "2025.09.01"
@@ -12,16 +12,15 @@ glanceAppwidget = "1.1.1"
 jsoup = "1.21.2"
 junit = "4.13.2"
 koin = "4.1.1"
-kotlin = "2.2.0"
+kotlin = "2.3.10"
 kotlinxCoroutinesAndroid = "1.10.2"
 kotlinxSerializationCore = "1.9.0"
-ksp = "2.2.0-2.0.2"
+ksp = "2.3.6"
 ktor = "3.3.0"
 libsu = "6.0.0"
 lifecycle = "2.9.4"
 material = "1.13.0"
 mockkAndroid = "1.14.5"
-multidex = "2.0.1"
 navigationCompose = "2.9.4"
 preference = "1.2.1"
 room = "2.8.0"
@@ -47,7 +46,6 @@ androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecyc
 androidx-lifecycle-viewmodel-compose = { group = "androidx.lifecycle", name = "lifecycle-viewmodel-compose", version.ref = "lifecycle" }
 androidx-lifecycle-viewmodel-ktx = { group = "androidx.lifecycle", name = "lifecycle-viewmodel-ktx", version.ref = "lifecycle" }
 androidx-lifecycle-viewmodel-savedstate = { group = "androidx.lifecycle", name = "lifecycle-viewmodel-savedstate", version.ref = "lifecycle" }
-androidx-multidex = { module = "androidx.multidex:multidex", version.ref = "multidex" }
 androidx-navigation-compose = { module = "androidx.navigation:navigation-compose", version.ref = "navigationCompose" }
 androidx-preference = { module = "androidx.preference:preference", version.ref = "preference" }
 androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
@@ -79,9 +77,9 @@ libsu = ["libsu-core", "libsu-nio"]
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 android-library = { id = "com.android.library", version.ref = "agp" }
-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+kotlin-parcelize = { id = "org.jetbrains.kotlin.plugin.parcelize", version.ref = "kotlin" }
+kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
-jetbrains-kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
-jetbrains-kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
 stability-analyzer = { id = "com.github.skydoves.compose.stability.analyzer", version = "0.6.6" }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sun Feb 21 17:02:43 BRT 2021
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-all.zip
+#Sun Feb 21 17:02:43 BRT 2021
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-all.zip