migrate(local-db): replace Room with SQLDelight for JS/WASM compatibility

Replaced Room with SQLDelight for improved multiplatform support, enabling JavaScript and WebAssembly targets. Added custom database driver implementations for JVM, JS, and WASM. Updated Gradle configurations, dependencies, and project structure accordingly.

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

@@ -5,12 +5,12 @@ import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 plugins {
   alias(libs.plugins.kotlinMultiplatform)
   alias(libs.plugins.kotlinSerialization)
-  alias(libs.plugins.androidx.room)
-  alias(libs.plugins.ksp)
+  alias(libs.plugins.sqldelight)
 }
 
 kotlin {
   // Toolchain is now handled centrally in the root build.gradle.kts
+  val enableWasm = providers.gradleProperty("enableWasm").orNull == "true"
 
   jvm()
   js {
@@ -19,18 +19,34 @@ kotlin {
     }
   }
 
+  if (enableWasm) {
+    @OptIn(org.jetbrains.kotlin.gradle.ExperimentalWasmDsl::class)
+    wasmJs {
+      browser()
+    }
+  }
+
   sourceSets {
     commonMain.dependencies {
       implementation(libs.koin.core)
-      implementation(libs.kotlinx.coroutines.core)
-      implementation(libs.androidx.room.runtime)
-      implementation(libs.androidx.sqlite.bundled)
+      implementation(libs.bundles.kmp.common) // Coroutines, Serialization, DateTime
+      implementation(libs.sqldelight.runtime)
+      implementation(libs.sqldelight.coroutines)
     }
 
     jvmMain.dependencies {
+      implementation(libs.sqldelight.driver.sqlite)
     }
 
     jsMain.dependencies {
+      implementation(libs.sqldelight.driver.web)
+    }
+
+    if (enableWasm) {
+      val wasmJsMain = getByName("wasmJsMain")
+      wasmJsMain.dependencies {
+        implementation(libs.sqldelight.driver.web)
+      }
     }
 
     commonTest.dependencies {
@@ -39,12 +55,11 @@ kotlin {
   }
 }
 
-room {
-  schemaDirectory("$projectDir/schemas")
-}
-
-dependencies {
-  add("kspCommonMainMetadata", libs.androidx.room.compiler)
-  add("kspJvm", libs.androidx.room.compiler)
-  // add("kspJs", libs.androidx.room.compiler) // Room compiler support for JS might vary, check specific version support
+sqldelight {
+  databases {
+    create("AppDatabase") {
+      packageName.set("at.mocode.frontend.core.localdb")
+      generateAsync.set(true) // WICHTIG: Async-First für JS/Wasm Support
+    }
+  }
 }