refactor(frontend, build): update PingViewModel initialization, resolve view model via Koin, and clean yarn dependencies

Injected `PingViewModel` via Koin to align with dependency injection best practices. Suppressed Gradle deprecation warnings and added the `frontend.core.sync` dependency. Cleaned up outdated packages in `yarn.lock`.

frontend/shells/meldestelle-portal/src/jvmMain/kotlin/main.kt

@@ -5,16 +5,37 @@ import androidx.compose.ui.unit.dp
 import at.mocode.shared.di.initKoin
 import at.mocode.frontend.core.network.networkModule
 import at.mocode.clients.authfeature.di.authFeatureModule
+import at.mocode.frontend.core.sync.di.syncModule
+import at.mocode.ping.feature.di.pingFeatureModule
+import at.mocode.frontend.core.localdb.AppDatabase
+import at.mocode.frontend.core.localdb.DatabaseProvider
 import navigation.navigationModule
+import kotlinx.coroutines.runBlocking
+import org.koin.core.context.loadKoinModules
+import org.koin.dsl.module
 
 fun main() = application {
   // Initialize DI (Koin) with shared modules + network module
   try {
-    initKoin { modules(networkModule, authFeatureModule, navigationModule) }
+    initKoin { modules(networkModule, syncModule, pingFeatureModule, authFeatureModule, navigationModule) }
     println("[DesktopApp] Koin initialized with networkModule + authFeatureModule + navigationModule")
   } catch (e: Exception) {
     println("[DesktopApp] Koin initialization warning: ${e.message}")
   }
+
+  // Create the local DB once and register it into Koin so feature repositories can resolve it.
+  try {
+    val provider = org.koin.core.context.GlobalContext.get().get<DatabaseProvider>()
+    val db = runBlocking { provider.createDatabase() }
+    loadKoinModules(
+      module {
+        single<AppDatabase> { db }
+      }
+    )
+    println("[DesktopApp] Local DB created and registered in Koin")
+  } catch (e: Exception) {
+    println("[DesktopApp] Local DB init warning: ${e.message}")
+  }
   Window(
     onCloseRequest = ::exitApplication,
     title = "Meldestelle - Desktop Development",