diff --git a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/core/AppConfig.kt b/_backup/shared/src/commonMain/kotlin/at/mocode/shared/core/AppConfig.kt
deleted file mode 100644
index 79761062..00000000
--- a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/core/AppConfig.kt
+++ /dev/null
@@ -1,12 +0,0 @@
-package at.mocode.shared.core
-
-data class AppConfig(
-  val gatewayUrl: String,
-  val isDebug: Boolean
-)
-
-// Standard-Config für Local Development
-val devConfig = AppConfig(
-  gatewayUrl = "http://localhost:8081",
-  isDebug = true
-)
diff --git a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/core/AppConstants.kt b/_backup/shared/src/commonMain/kotlin/at/mocode/shared/core/AppConstants.kt
deleted file mode 100644
index 640d7fc4..00000000
--- a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/core/AppConstants.kt
+++ /dev/null
@@ -1,29 +0,0 @@
-package at.mocode.shared.core
-
-/**
- * Shared application configuration constants for clients.
- * These defaults target local development environments.
- */
-object AppConstants {
-  // Gateway base URL (reverse proxy / API gateway)
-  // Used by NetworkConfig via PlatformConfig
-  const val GATEWAY_URL: String = "http://localhost:8081"
-
-  // Keycloak configuration
-  const val KEYCLOAK_URL: String = "http://localhost:8180"
-  const val KEYCLOAK_REALM: String = "meldestelle"
-
-  // Use 'postman-client' for Desktop App Password Flow (Direct Access Grants enabled)
-  // 'web-app' is for Browser Flow (PKCE)
-  // TODO: Make this platform-dependent (Desktop vs Web)
-  const val KEYCLOAK_CLIENT_ID: String = "web-app"
-
-  // DEV ONLY: Client Secret for 'postman-client' (Confidential Client)
-  // In Production, this should NEVER be in the frontend code.
-  // For the Desktop App Pilot, we use this to simulate a secure client.
-  // For 'web-app' (Public Client), this is not needed/used if configured correctly,
-  // but our AuthApiClient might be sending it.
-  const val KEYCLOAK_CLIENT_SECRET: String = "postman-secret-123"
-
-  // Removed unused browser flow URLs (registerUrl, loginUrl, etc.) as we focus on Desktop App.
-}
diff --git a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/domain/model/ApiModels.kt b/_backup/shared/src/commonMain/kotlin/at/mocode/shared/domain/model/ApiModels.kt
deleted file mode 100644
index af86b1ca..00000000
--- a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/domain/model/ApiModels.kt
+++ /dev/null
@@ -1,41 +0,0 @@
-package at.mocode.shared.domain.model
-
-import kotlinx.serialization.Serializable
-
-/**
- * Generischer Wrapper für API-Antworten.
- */
-@Serializable
-data class ApiResponse<T>(
-  val success: Boolean,
-  val data: T? = null,
-  val error: ApiError? = null
-)
-
-@Serializable
-data class ApiError(
-  val code: String,
-  val message: String,
-  val details: Map<String, String> = emptyMap()
-)
-
-/**
- * Das Ergebnis eines Repository-Aufrufs.
- * Die UI kennt nur das hier, keine HTTP-Exceptions!
- */
-sealed class Resource<out T> {
-  data class Success<T>(val data: T) : Resource<T>()
-  data class Error(val message: String, val code: String? = null) : Resource<Nothing>()
-  data object Loading : Resource<Nothing>()
-}
-
-/**
- * Datenmodell für den Ping.
- */
-@Serializable
-data class PingData(
-  val status: String,
-  val timestamp: String,
-  val service: String
-)
-
diff --git a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/presentation/actions/AppAction.kt b/_backup/shared/src/commonMain/kotlin/at/mocode/shared/presentation/actions/AppAction.kt
deleted file mode 100644
index d575816c..00000000
--- a/_backup/shared/src/commonMain/kotlin/at/mocode/shared/presentation/actions/AppAction.kt
+++ /dev/null
@@ -1,37 +0,0 @@
-package at.mocode.shared.presentation.actions
-
-import at.mocode.shared.presentation.state.Notification
-import at.mocode.frontend.core.domain.models.User
-import at.mocode.frontend.core.domain.models.AuthToken
-
-sealed class AppAction {
-  // Auth Actions
-  sealed class Auth : AppAction() {
-    data class LoginStart(val username: String, val password: String) : Auth()
-    data class LoginSuccess(val user: User, val token: AuthToken) : Auth()
-    data class LoginFailure(val error: String) : Auth()
-    object Logout : Auth()
-    data class RefreshToken(val newToken: AuthToken) : Auth()
-  }
-
-  // Navigation Actions
-  sealed class Navigation : AppAction() {
-    data class NavigateTo(val route: String) : Navigation()
-    object NavigateBack : Navigation()
-    data class UpdateHistory(val route: String) : Navigation()
-  }
-
-  // UI Actions
-  sealed class UI : AppAction() {
-    object ToggleDarkMode : UI()
-    data class SetLoading(val isLoading: Boolean) : UI()
-    data class ShowNotification(val notification: Notification) : UI()
-    data class DismissNotification(val id: String) : UI()
-  }
-
-  // Network Actions
-  sealed class Network : AppAction() {
-    data class SetOnlineStatus(val isOnline: Boolean) : Network()
-    data class UpdateLastSync(val timestamp: String) : Network()
-  }
-}