Remove test-app.js from the project

test-app/build.gradle.kts

@@ -1,6 +1,7 @@
 @file:OptIn(ExperimentalKotlinGradlePluginApi::class)
 
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
+import org.jetbrains.kotlin.gradle.dsl.JsSourceMapEmbedMode
 
 plugins {
     kotlin("multiplatform") version "2.1.10"
@@ -23,10 +24,13 @@ kotlin {
     js {
         compilerOptions {
             target.set("es2015")
+            sourceMap.set(true)
+            sourceMapEmbedSources.set(JsSourceMapEmbedMode.SOURCE_MAP_SOURCE_CONTENT_ALWAYS)
         }
         browser {
             commonWebpackConfig {
                 sourceMaps = true
+                devtool = "inline-source-map"
             }
             binaries.executable()
             distribution {