Use DesktopMaterialTheme instead of MaterialTheme

templates/desktop-template/src/main/kotlin/main.kt

@@ -1,3 +1,4 @@
+import androidx.compose.desktop.DesktopMaterialTheme
 import androidx.compose.desktop.ui.tooling.preview.Preview
 import androidx.compose.material.Text
 import androidx.compose.material.Button
@@ -11,7 +12,7 @@ import androidx.compose.ui.window.application
 fun Screen() {
     var text by remember { mutableStateOf("Hello, World!") }
 
-    MaterialTheme {
+    DesktopMaterialTheme {
         Button(onClick = {
             text = "Hello, Desktop!"
         }) {

templates/multiplatform-template/android/src/main/java/com/myapplication/MainActivity.kt

@@ -4,13 +4,16 @@ import App
 import android.os.Bundle
 import androidx.activity.compose.setContent
 import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.material.MaterialTheme
 
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         setContent {
+            MaterialTheme {
                 App()
             }
         }
     }
+}

templates/multiplatform-template/common/src/commonMain/kotlin/App.kt

@@ -7,13 +7,11 @@ import androidx.compose.runtime.*
 fun App() {
     var text by remember { mutableStateOf("Hello, World!") }
 
-    MaterialTheme {
     Button(onClick = {
         text = "Hello, ${getPlatformName()}"
     }) {
         Text(text)
     }
 }
-}
 
 expect fun getPlatformName(): String

templates/multiplatform-template/desktop/src/jvmMain/kotlin/main.kt

@@ -1,8 +1,11 @@
+import androidx.compose.desktop.DesktopMaterialTheme
 import androidx.compose.ui.window.Window
 import androidx.compose.ui.window.application
 
 fun main() = application {
     Window(onCloseRequest = ::exitApplication) {
+        DesktopMaterialTheme {
             App()
         }
     }
+}