feat: UI improvements - toolbar styling, dialog layouts, and new components

- Update ViewToolbar button styling

- Redesign DeliveryStationDialog with tabbed interface

- Adjust MainLayout drawer styling

- Add new component styles for Vaadin components

src/main/frontend/themes/votian-modern/components/vaadin-tabsheet.css

@@ -0,0 +1,5 @@
+[part="tabs-container"] {
+  background: white;
+  border-radius: 24px 24px 0 0;
+  border-bottom: 1px solid #e0e0e0;
+}

src/main/java/de/assecutor/votianlt/pages/base/ui/component/DeliveryStationDialog.java

@@ -6,6 +6,7 @@ import com.vaadin.flow.component.checkbox.Checkbox;
 import com.vaadin.flow.component.combobox.ComboBox;
 import com.vaadin.flow.component.confirmdialog.ConfirmDialog;
 import com.vaadin.flow.component.dialog.Dialog;
+import com.vaadin.flow.component.html.Div;
 import com.vaadin.flow.component.html.H3;
 import com.vaadin.flow.component.html.Span;
 import com.vaadin.flow.component.icon.Icon;
@@ -211,12 +212,14 @@ public class DeliveryStationDialog extends Dialog {
         setWidth("960px");
         setHeight("80vh");
 
+        // Remove white rounded card from dialog overlay
+        getElement().setAttribute("theme", "no-inner-card");
+
         // Address form
         VerticalLayout formLayout = new VerticalLayout();
         formLayout.setPadding(true);
         formLayout.setSpacing(true);
         formLayout.setWidthFull();
-        formLayout.addClassName("dialog-form-panel");
 
         // Company with autocomplete
         company = new ComboBox<>(translationHelper.getTranslation("profile.company"));
@@ -325,7 +328,27 @@ public class DeliveryStationDialog extends Dialog {
                 createTasksTab(templates, templateSaveCallback));
         tasksTab.add(tasksTabError);
 
-        add(tabSheet);
+        // Transparent border frame filling the dialog
+        Div frame = new Div();
+        frame.getStyle().set("border", "10px solid transparent");
+        frame.getStyle().set("border-radius", "0");
+        frame.getStyle().set("box-sizing", "border-box");
+        frame.getStyle().set("display", "flex");
+        frame.getStyle().set("flex-direction", "column");
+        frame.getStyle().set("flex", "1");
+        frame.setSizeFull();
+
+        // White card with rounded corners inside the frame
+        Div whiteCard = new Div();
+        whiteCard.getStyle().set("background", "white");
+        whiteCard.getStyle().set("border-radius", "24px");
+        whiteCard.getStyle().set("flex", "1");
+        whiteCard.getStyle().set("overflow", "auto");
+        whiteCard.setSizeFull();
+        whiteCard.add(tabSheet);
+
+        frame.add(whiteCard);
+        add(frame);
 
         // Footer buttons
         Button saveButton = new Button(translationHelper.getTranslation("dialog.confirm"), e -> {
@@ -695,7 +718,6 @@ public class DeliveryStationDialog extends Dialog {
         content.setPadding(false);
         content.setSpacing(true);
         content.setDefaultHorizontalComponentAlignment(FlexComponent.Alignment.STRETCH);
-        content.addClassName("dialog-content-panel");
 
         // Task title with template selection
         H3 tasksTitle = new H3(translationHelper.getTranslation("addjob.tasks.title"));

src/main/java/de/assecutor/votianlt/pages/base/ui/component/ViewToolbar.java

@@ -28,11 +28,13 @@ public final class ViewToolbar extends Composite<Header> {
             var title = new H1(viewTitle);
             title.addClassNames(FontSize.XLARGE, Margin.NONE, FontWeight.LIGHT);
             title.addClassName("view-toolbar-title");
+            title.getStyle().set("white-space", "nowrap");
             toggleAndTitle = new Div(drawerToggle, title);
         } else {
             var title = new H1(viewTitle);
             title.addClassNames(FontSize.XLARGE, Margin.NONE, FontWeight.LIGHT);
             title.addClassName("view-toolbar-title");
+            title.getStyle().set("white-space", "nowrap");
             toggleAndTitle = new Div(title);
         }
         toggleAndTitle.addClassNames(Display.FLEX, AlignItems.CENTER);

src/main/java/de/assecutor/votianlt/pages/base/ui/view/MainLayout.java

@@ -198,6 +198,7 @@ public final class MainLayout extends AppLayout {
             // Label
             Span label = new Span(item.label());
             label.getStyle().set("font-size", "var(--lumo-font-size-s)");
+            label.getStyle().set("white-space", "nowrap");
             label.addClassName("app-nav-label");
             row.add(label);
             row.setFlexGrow(1, label);