diff --git a/src/main/java/de/assecutor/votianlt/pages/base/ui/view/MainLayout.java b/src/main/java/de/assecutor/votianlt/pages/base/ui/view/MainLayout.java
index 61d87b2..8e61838 100644
--- a/src/main/java/de/assecutor/votianlt/pages/base/ui/view/MainLayout.java
+++ b/src/main/java/de/assecutor/votianlt/pages/base/ui/view/MainLayout.java
@@ -43,7 +43,6 @@ public final class MainLayout extends AppLayout {
     }
 
     private Div createHeader() {
-        // TODO Replace with real application logo and name
         var appLogo = VaadinIcon.CUBES.create();
         appLogo.addClassNames(TextColor.PRIMARY, IconSize.LARGE);
 
@@ -86,7 +85,7 @@ public final class MainLayout extends AppLayout {
         SideNavItem statistics = new SideNavItem("Statistik", "6", new Icon(VaadinIcon.COG));
 
         verwaltungContent.add(jobs, customers, appUsers, devices, invoices, statistics);
-        verwaltungDetails.setContent(verwaltungContent);
+        verwaltungDetails.add(verwaltungContent);
 
         // Create Details component for "Verwaltung" with collapsible list
         Details userDetails = new Details();
@@ -104,7 +103,7 @@ public final class MainLayout extends AppLayout {
         SideNavItem imprint = new SideNavItem("Impressum", "9", new Icon(VaadinIcon.COG));
 
         userContent.add(profile, myInvoices, imprint);
-        userDetails.setContent(userContent);
+        userDetails.add(userContent);
 
         // Create a vertical layout to hold both regular menu items and collapsible sections
         VerticalLayout navContainer = new VerticalLayout();
diff --git a/src/main/java/de/assecutor/votianlt/pages/service/AddJobService.java b/src/main/java/de/assecutor/votianlt/pages/service/AddJobService.java
index 123e333..31bc9f9 100644
--- a/src/main/java/de/assecutor/votianlt/pages/service/AddJobService.java
+++ b/src/main/java/de/assecutor/votianlt/pages/service/AddJobService.java
@@ -68,8 +68,7 @@ public class AddJobService {
                             copy.setHeightMm(ci.getHeightMm());
                             return copy;
                         }).toList();
-                var savedItems = cargoItemRepository.saveAll(itemsWithJob);
-                var cargoIds = savedItems.stream().map(CargoItem::getId).toList();
+                cargoItemRepository.saveAll(itemsWithJob);
                 modified = true;
             // Tasks separat speichern und referenzieren
             if (transientTasks != null && !transientTasks.isEmpty()) {
@@ -78,8 +77,7 @@ public class AddJobService {
                     .filter(te -> te.getText() != null && !te.getText().isBlank())
                     .peek(te -> te.setJobId(jobId))
                     .toList();
-                var savedTasks = taskRepository.saveAll(prepared);
-                var taskIds = savedTasks.stream().map(de.assecutor.votianlt.model.TaskEntry::getId).toList();
+                taskRepository.saveAll(prepared);
                 modified = true;
             }
             }
@@ -169,7 +167,8 @@ public class AddJobService {
                     LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss")));
             }
 
-            Job savedDraft = jobRepository.save(draftJob);
+            jobRepository.save(draftJob);
+    
             log.info("Entwurf automatisch gespeichert für Benutzer: {}", currentUser);
 
         } catch (Exception e) {
diff --git a/src/main/java/de/assecutor/votianlt/pages/service/CustomerService.java b/src/main/java/de/assecutor/votianlt/pages/service/CustomerService.java
index b3c0d8f..cbd5b2a 100644
--- a/src/main/java/de/assecutor/votianlt/pages/service/CustomerService.java
+++ b/src/main/java/de/assecutor/votianlt/pages/service/CustomerService.java
@@ -2,7 +2,6 @@ package de.assecutor.votianlt.pages.service;
 
 import de.assecutor.votianlt.model.Customer;
 import de.assecutor.votianlt.pages.domain.CustomerRepository;
-import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Propagation;
 import org.springframework.transaction.annotation.Transactional;
diff --git a/src/main/java/de/assecutor/votianlt/pages/view/RegisterView.java b/src/main/java/de/assecutor/votianlt/pages/view/RegisterView.java
index adbb433..af9283e 100644
--- a/src/main/java/de/assecutor/votianlt/pages/view/RegisterView.java
+++ b/src/main/java/de/assecutor/votianlt/pages/view/RegisterView.java
@@ -12,21 +12,20 @@ import com.vaadin.flow.component.textfield.TextField;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;
 import com.vaadin.flow.server.auth.AnonymousAllowed;
-import de.assecutor.votianlt.pages.service.RegisterService;
 import de.assecutor.votianlt.pages.service.UserService;
 
-import java.time.Clock;
-
 @Route("register")
 @PageTitle("Bei VotianLT registrieren")
 @AnonymousAllowed
 public class RegisterView extends VerticalLayout {
+    private final UserService userService;
     private TextField emailField;
     private PasswordField passwordField;
     private PasswordField confirmPasswordField;
     private Button submitButton;
 
-    public RegisterView() {
+    public RegisterView(UserService userService) {
+        this.userService = userService;
         // Layout-Konfiguration für vollständige Zentrierung
         setSizeFull();
         setJustifyContentMode(FlexComponent.JustifyContentMode.CENTER);
diff --git a/src/main/java/de/assecutor/votianlt/security/UserDetailsServiceImpl.java b/src/main/java/de/assecutor/votianlt/security/UserDetailsServiceImpl.java
index 7995c32..33098bc 100644
--- a/src/main/java/de/assecutor/votianlt/security/UserDetailsServiceImpl.java
+++ b/src/main/java/de/assecutor/votianlt/security/UserDetailsServiceImpl.java
@@ -3,16 +3,11 @@ package de.assecutor.votianlt.security;
 import de.assecutor.votianlt.model.User;
 import de.assecutor.votianlt.pages.service.UserService;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.stereotype.Service;
 
-import java.util.Collection;
-import java.util.Collections;
-
 @Service
 public class UserDetailsServiceImpl implements UserDetailsService {