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.

frontend/core/local-db/build.gradle.kts

@@ -3,8 +3,7 @@
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 
 plugins {
-  // Fix for "Plugin loaded multiple times": Apply plugin by ID without version (inherited from root)
-  id("org.jetbrains.kotlin.multiplatform")
+  alias(libs.plugins.kotlinMultiplatform)
   alias(libs.plugins.kotlinSerialization)
   alias(libs.plugins.sqldelight)
 }
@@ -13,12 +12,7 @@ kotlin {
   jvm()
   js {
     binaries.library()
-    // Re-enabled browser environment after Root NodeJs fix
-    browser {
-        testTask {
-            enabled = false
-        }
-    }
+    browser()
   }
 
   sourceSets {
@@ -35,7 +29,7 @@ kotlin {
 
     jsMain.dependencies {
       implementation(libs.sqldelight.driver.web)
-      implementation(npm("@sqlite.org/sqlite-wasm", "3.51.1-build2"))
+      implementation(npm("@sqlite.org/sqlite-wasm", libs.versions.sqliteWasm.get()))
     }
 
     commonTest.dependencies {