chore: refactor Gradle config, standardize Kotlin MPP plugin usage, and update dependencies

- Unified plugin application across modules using `alias(libs.plugins.*)` instead of hardcoded IDs.
- Removed redundant JVM/JS source map tasks, improving Gradle and Docker build consistency.
- Updated dependencies, including `logback` and Webpack `copy-webpack-plugin`, and added contextual documentation.
- Added frontend architecture diagram in PlantUML (`docs/01_Architecture/Reference`), standardizing feature-core-shell dependencies.

platform/platform-testing/build.gradle.kts

@@ -1,38 +1,34 @@
 // Dieses Modul bündelt alle für JVM-Tests notwendigen Abhängigkeiten.
 // Jedes Modul, das Tests enthält, sollte dieses Modul mit `testImplementation` einbinden.
 plugins {
-    alias(libs.plugins.kotlinJvm)
+  alias(libs.plugins.kotlinJvm)
 }
 
 dependencies {
-    // Importiert die zentrale BOM für konsistente Versionen.
-    api(platform(projects.platform.platformBom))
-    // Diese Bundles sind in `libs.versions.toml` definiert.
-    // api(libs.bundles.testing.jvm)
-    api(libs.junit.jupiter.api)
-    api(libs.junit.jupiter.engine)
-    api(libs.junit.jupiter.params)
-    api(libs.junit.platform.launcher)
-    api(libs.mockk)
-    api(libs.assertj.core)
-    api(libs.kotlinx.coroutines.test)
+  // Importiert die zentrale BOM für konsistente Versionen.
+  api(platform(projects.platform.platformBom))
 
-    // api(libs.bundles.testcontainers)
-    api(libs.testcontainers.core)
-    api(libs.testcontainers.junit.jupiter)
-    api(libs.testcontainers.postgresql)
-    api(libs.testcontainers.keycloak)
+  // Testing Libraries
+  api(libs.junit.jupiter.api)
+  api(libs.junit.jupiter.engine)
+  api(libs.junit.jupiter.params)
+  api(libs.junit.platform.launcher)
+  api(libs.mockk)
+  api(libs.assertj.core)
+  api(libs.kotlinx.coroutines.test)
 
-    // Macht Kafka- und Reactor-Test-Bibliotheken verfügbar
-    api(libs.testcontainers.kafka)
-    api(libs.reactor.test)
-    // Stellt Spring Boot Test-Abhängigkeiten und die H2-Datenbank für Tests bereit.
-    api(libs.spring.boot.starter.test)
-    api(libs.h2.driver)
-}
-
-tasks.withType<Test> {
-    useJUnitPlatform()
-    // Removed parallel execution and byte-buddy agent configuration to prevent conflicts
-    // with global test configuration in root build.gradle.kts
+  // Logging für Tests (wichtig, um NoClassDefFoundError bei Logback zu vermeiden)
+  api(libs.logback.classic)
+
+  // Testcontainers
+  api(libs.testcontainers.core)
+  api(libs.testcontainers.junit.jupiter)
+  api(libs.testcontainers.postgresql)
+  api(libs.testcontainers.keycloak)
+  api(libs.testcontainers.kafka)
+
+  // Reactor & Spring Testing
+  api(libs.reactor.test)
+  api(libs.spring.boot.starter.test)
+  api(libs.h2.driver)
 }