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.

backend/infrastructure/security/build.gradle.kts

@@ -1,40 +1,32 @@
 plugins {
-    alias(libs.plugins.kotlinJvm)
-    alias(libs.plugins.kotlinSpring)
-    alias(libs.plugins.spring.boot)
-    alias(libs.plugins.spring.dependencyManagement)
+  alias(libs.plugins.kotlinJvm)
+  alias(libs.plugins.kotlinSpring)
+  alias(libs.plugins.spring.boot)
+  alias(libs.plugins.spring.dependencyManagement)
 }
 
 // Library module: do not create an executable Spring Boot jar here.
 tasks.bootJar {
-    enabled = false
+  enabled = false
 }
 
 tasks.jar {
-    enabled = true
+  enabled = true
 }
 
 dependencies {
-    implementation(platform(projects.platform.platformBom))
-    implementation(projects.platform.platformDependencies)
+  implementation(platform(projects.platform.platformBom))
+  implementation(projects.platform.platformDependencies)
 
-    // Spring Security & OAuth2
-    implementation(libs.spring.boot.starter.security)
-    implementation(libs.spring.boot.starter.oauth2.resource.server)
-    implementation(libs.spring.security.oauth2.jose)
+  // Spring Security & OAuth2
+  implementation(libs.spring.boot.starter.security)
+  implementation(libs.spring.boot.starter.oauth2.resource.server)
+  implementation(libs.spring.security.oauth2.jose)
 
-    // Web (for CORS config)
-    implementation(libs.spring.web)
+  // Web (for CORS config)
+  implementation(libs.spring.web)
 
-    // Utils
-    implementation(libs.slf4j.api)
-    implementation(libs.jackson.module.kotlin)
-
-    // Testing
-    testImplementation(projects.platform.platformTesting)
-    testImplementation(libs.spring.security.test)
-}
-
-tasks.test {
-    useJUnitPlatform()
+  // Testing
+  testImplementation(projects.platform.platformTesting)
+  testImplementation(libs.spring.security.test)
 }