Initial LibGDX project scaffold for ArtLegend

Multi-module Gradle setup targeting Android (S-Pen) and Desktop (Wacom/LWJGL3).
Includes core game stub, Android launcher with immersive mode, and desktop launcher.
Asset directory shared across platforms. Gradle 8.6, Kotlin 1.9.23, LibGDX 1.12.1.

android/build.gradle.kts

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+plugins {
+    kotlin("android")
+    id("com.android.application")
+}
+
+val gdxVersion: String by project
+val natives: Configuration by configurations.creating
+
+android {
+    namespace = "com.artlegend"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.artlegend"
+        minSdk = 26
+        targetSdk = 34
+        versionCode = 1
+        versionName = "0.1.0"
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+
+    sourceSets {
+        getByName("main") {
+            assets.srcDirs(rootProject.file("assets"))
+            jniLibs.srcDirs("libs")
+        }
+    }
+}
+
+dependencies {
+    implementation(project(":core"))
+    implementation("com.badlogicgames.gdx:gdx-backend-android:$gdxVersion")
+    natives("com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-armeabi-v7a")
+    natives("com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-arm64-v8a")
+    natives("com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86")
+    natives("com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-x86_64")
+}
+
+tasks.register("copyAndroidNatives") {
+    doFirst {
+        natives.files.forEach { jar ->
+            val outputDir = file("libs")
+            outputDir.mkdirs()
+            copy {
+                from(zipTree(jar))
+                into(outputDir)
+                include("*.so")
+                eachFile { path = name }
+                includeEmptyDirs = false
+            }
+        }
+    }
+}
+
+tasks.whenTaskAdded {
+    if (name.contains("package") || name.contains("assemble") || name.contains("bundle")) {
+        dependsOn("copyAndroidNatives")
+    }
+}

android/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <!-- Stylus is preferred but not required — allows install on non-stylus devices -->
+    <uses-feature android:name="android.hardware.touchscreen" android:required="false" />
+    <uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="false" />
+
+    <application
+        android:allowBackup="true"
+        android:label="@string/app_name"
+        android:theme="@style/GdxTheme">
+
+        <activity
+            android:name=".AndroidLauncher"
+            android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout"
+            android:exported="true"
+            android:screenOrientation="fullSensor">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

android/src/main/kotlin/com/artlegend/AndroidLauncher.kt

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+package com.artlegend
+
+import android.os.Bundle
+import com.badlogic.gdx.backends.android.AndroidApplication
+import com.badlogic.gdx.backends.android.AndroidApplicationConfiguration
+
+class AndroidLauncher : AndroidApplication() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val config = AndroidApplicationConfiguration().apply {
+            useImmersiveMode = true
+            useGyroscope = false
+            useAccelerometer = false
+        }
+        initialize(ArtLegend(), config)
+    }
+}

android/src/main/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">ArtLegend</string>
+</resources>

android/src/main/res/values/styles.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="GdxTheme" parent="android:Theme.NoTitleBar.Fullscreen" />
+</resources>