fix and upgrade gradle

shared/build.gradle.kts

@@ -1,16 +1,25 @@
-import org.jetbrains.kotlin.gradle.targets.js.dsl.ExperimentalWasmDsl
+// shared/build.gradle.kts
+@file:OptIn(org.jetbrains.kotlin.gradle.ExperimentalWasmDsl::class)
+
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig
 
 plugins {
-    alias(libs.plugins.kotlinMultiplatform)
-    alias(libs.plugins.kotlinSerialization)
+    alias(libs.plugins.kotlin.multiplatform)
+    alias(libs.plugins.kotlin.serialization)
 }
 
 kotlin {
     jvm()
 
-    @OptIn(ExperimentalWasmDsl::class)
     wasmJs {
+
+        var isMpp: Boolean = false // Beispiel: Deine aktuelle Zuweisung
+
+        @Deprecated("Use getMpp() instead", ReplaceWith("getMpp()"))
+        fun isMpp(): Boolean = isMpp
+
+        fun getMpp(): Boolean = isMpp
+
         browser {
             val rootDirPath = project.rootDir.path
             val projectDirPath = project.projectDir.path
@@ -29,7 +38,7 @@ kotlin {
     sourceSets {
         val commonMain by getting {
             dependencies {
-                // Multiplatform dependencies
+                // Multiplatform-Abhängigkeiten
                 implementation(libs.kotlinx.serialization.json)
                 implementation(libs.kotlinx.datetime)
                 implementation(libs.uuid)
@@ -50,5 +59,6 @@ kotlin {
 //        val wasmJsMain by getting {
 //            dependsOn(commonMain)
 //        }
+
     }
 }