refactor: UI-Verbesserungen in Views und Theme-Styles

src/main/frontend/themes/votian-modern/styles.css

@@ -118,7 +118,7 @@ vaadin-app-layout::part(content) {
 .view-container {
   display: flex;
   flex-direction: column;
-  background: red;
+  background: transparent;
   margin: 20px;
   width: calc(100% - 40px);
   max-width: calc(100% - 40px);
@@ -1581,15 +1581,42 @@ vaadin-grid-tree-toggle[expanded] .nav-expand-icon {
 
 vaadin-button {
   font-weight: 700;
+  border-radius: var(--lumo-border-radius-m);
   transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
 }
 
-vaadin-button:hover {
+vaadin-button:not([disabled]):hover {
   transform: translateY(-1px);
 }
 
 vaadin-button[theme~="primary"] {
-  box-shadow: 0 16px 28px rgba(37, 99, 235, 0.22);
+  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.22);
+}
+
+vaadin-button[theme~="primary"]:not([disabled]):hover {
+  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.32);
+}
+
+vaadin-button[theme~="primary"][theme~="success"] {
+  box-shadow: 0 8px 20px rgba(5, 150, 105, 0.24);
+}
+
+vaadin-button[theme~="primary"][theme~="success"]:not([disabled]):hover {
+  box-shadow: 0 12px 28px rgba(5, 150, 105, 0.34);
+}
+
+vaadin-button[theme~="primary"][theme~="error"] {
+  box-shadow: 0 8px 20px rgba(220, 38, 38, 0.24);
+}
+
+vaadin-button[theme~="tertiary"][theme~="error"]:not([disabled]):hover {
+  background: rgba(220, 38, 38, 0.08);
+  transform: translateY(-1px);
+}
+
+vaadin-button[disabled] {
+  opacity: 0.46;
+  transform: none !important;
 }
 
 vaadin-text-field,

src/main/java/de/assecutor/votianlt/pages/view/EditAppUserView.java

@@ -257,6 +257,7 @@ public class EditAppUserView extends VerticalLayout implements HasUrlParameter<S
         confirmDeleteButton.addThemeVariants(ButtonVariant.LUMO_ERROR);
 
         Button cancelDeleteButton = new Button(getTranslation("button.cancel"), e -> confirmDialog.close());
+        cancelDeleteButton.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
 
         buttonLayout.add(confirmDeleteButton, cancelDeleteButton);
         buttonLayout.setSpacing(true);

src/main/java/de/assecutor/votianlt/pages/view/EditCustomerView.java

@@ -194,6 +194,7 @@ public class EditCustomerView extends VerticalLayout implements HasUrlParameter<
         confirmDeleteButton.addThemeVariants(ButtonVariant.LUMO_ERROR);
 
         Button cancelDeleteButton = new Button(getTranslation("button.cancel"), e -> confirmDialog.close());
+        cancelDeleteButton.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
 
         buttonLayout.add(confirmDeleteButton, cancelDeleteButton);
         buttonLayout.setSpacing(true);

src/main/java/de/assecutor/votianlt/pages/view/ForgotPasswordRequestView.java

@@ -43,6 +43,7 @@ public class ForgotPasswordRequestView extends VerticalLayout implements HasDyna
         emailField.setAutofocus(true);
 
         Button cancel = new Button("Abbrechen", e -> getUI().ifPresent(ui -> ui.navigate("login")));
+        cancel.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
         Button submit = new Button("E-Mail senden", e -> {
             String email = emailField.getValue();
             if (email == null || email.isBlank()) {

src/main/java/de/assecutor/votianlt/pages/view/MessageDetailsView.java

@@ -296,6 +296,7 @@ public class MessageDetailsView extends Main implements BeforeEnterObserver, Has
         confirmButton.setEnabled(false);
 
         Button cancelButton = new Button("Abbrechen", event -> dialog.close());
+        cancelButton.addThemeVariants(com.vaadin.flow.component.button.ButtonVariant.LUMO_TERTIARY);
 
         upload.addSucceededListener(event -> {
             try (InputStream inputStream = buffer.getInputStream()) {
@@ -669,6 +670,7 @@ public class MessageDetailsView extends Main implements BeforeEnterObserver, Has
 
     private HorizontalLayout createHeaderLayout(String clientName, String conversationTitle) {
         Button backButton = new Button("Zurück", VaadinIcon.ARROW_LEFT.create());
+        backButton.addThemeVariants(com.vaadin.flow.component.button.ButtonVariant.LUMO_TERTIARY);
         backButton.addClickListener(e -> UI.getCurrent().navigate("user-messages/" + participantKey));
 
         VerticalLayout titleLayout = new VerticalLayout();

src/main/java/de/assecutor/votianlt/pages/view/MyInvoicesView.java

@@ -2,6 +2,7 @@ package de.assecutor.votianlt.pages.view;
 
 import com.vaadin.flow.component.Component;
 import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.button.ButtonVariant;
 import com.vaadin.flow.component.grid.Grid;
 import com.vaadin.flow.component.grid.GridVariant;
 import com.vaadin.flow.component.grid.ColumnTextAlign;
@@ -168,6 +169,8 @@ public class MyInvoicesView extends Main implements HasDynamicTitle {
         // Paginierungs-Buttons (vorerst ohne Funktion, als Platzhalter)
         Button prev = new Button(getTranslation("myinvoices.button.prev"), VaadinIcon.ANGLE_LEFT.create());
         Button next = new Button(getTranslation("myinvoices.button.next"), VaadinIcon.ANGLE_RIGHT.create());
+        prev.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
+        next.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
         prev.setEnabled(false);
         next.setEnabled(false);
         HorizontalLayout pager = new HorizontalLayout(prev, next);

src/main/java/de/assecutor/votianlt/pages/view/ShowCustomersView.java

@@ -1,6 +1,7 @@
 package de.assecutor.votianlt.pages.view;
 
 import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.button.ButtonVariant;
 import com.vaadin.flow.component.grid.Grid;
 import com.vaadin.flow.component.html.Div;
 import com.vaadin.flow.component.html.Paragraph;
@@ -34,6 +35,7 @@ public class ShowCustomersView extends VerticalLayout implements HasDynamicTitle
         addClassName("data-view");
 
         Button addCustomerButton = new Button(getTranslation("customers.button.add"), new Icon(VaadinIcon.PLUS));
+        addCustomerButton.addThemeVariants(ButtonVariant.LUMO_PRIMARY);
         add(new ViewToolbar(getTranslation("customers.title"), addCustomerButton));
 
         // Add hint text

src/main/java/de/assecutor/votianlt/pages/view/ShowJobsView.java

@@ -70,6 +70,7 @@ public class ShowJobsView extends VerticalLayout implements HasDynamicTitle {
         searchField.setLabel(getTranslation("jobs.filter.search"));
         statusFilter.setLabel(getTranslation("jobs.filter.status"));
         Button exportButton = new Button(getTranslation("jobs.button.csvexport"));
+        exportButton.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
         ViewToolbar toolbar = new ViewToolbar(getTranslation("nav.jobs"), exportButton);
         add(toolbar);
 
@@ -84,6 +85,7 @@ public class ShowJobsView extends VerticalLayout implements HasDynamicTitle {
 
         // Filterleiste mit Export-Button am rechten Rand
         Button applyFilter = new Button(getTranslation("jobs.filter.apply"));
+        applyFilter.addThemeVariants(ButtonVariant.LUMO_PRIMARY);
         HorizontalLayout leftFilters = new HorizontalLayout(startDate, endDate, searchField, statusFilter, applyFilter);
         leftFilters.setAlignItems(Alignment.END);
         leftFilters.getStyle().set("flex-wrap", "wrap");

src/main/java/de/assecutor/votianlt/pages/view/UserMessagesView.java

@@ -2,6 +2,7 @@ package de.assecutor.votianlt.pages.view;
 
 import com.vaadin.flow.component.UI;
 import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.component.button.ButtonVariant;
 import com.vaadin.flow.component.html.Div;
 import com.vaadin.flow.component.html.H2;
 import com.vaadin.flow.component.html.H3;
@@ -98,6 +99,7 @@ public class UserMessagesView extends Main implements HasUrlParameter<String>, H
 
     private HorizontalLayout createHeaderLayout(String clientName) {
         Button backButton = new Button(getTranslation("button.back"), VaadinIcon.ARROW_LEFT.create());
+        backButton.addThemeVariants(ButtonVariant.LUMO_TERTIARY);
         backButton.addClickListener(e -> UI.getCurrent().navigate("messages"));
 
         H2 title = new H2(getTranslation("usermessages.title.with", clientName));