feat: cible desktop macOS via :desktopApp:run

desktopApp/build.gradle.kts

@@ -0,0 +1,27 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
+plugins {
+    alias(libs.plugins.kotlin.jvm)
+    alias(libs.plugins.compose.compiler)
+    alias(libs.plugins.compose.multiplatform)
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
+}
+
+kotlin {
+    compilerOptions { jvmTarget.set(JvmTarget.JVM_17) }
+}
+
+dependencies {
+    implementation(project(":sharedUI"))
+    implementation(compose.desktop.currentOs)
+}
+
+compose.desktop {
+    application {
+        mainClass = "com.livrets.desktop.MainKt"
+    }
+}