feat: add HasAriaRole to Badge, deprecate setRole and getRole (#9591)

## Description

Part of #9489

## Type of change

- Refactor

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: web-padawan

vaadin-badge-flow-parent/vaadin-badge-flow/src/main/java/com/vaadin/flow/component/badge/Badge.java

@@ -18,6 +18,7 @@
 import java.util.Optional;
 
 import com.vaadin.flow.component.Component;
+import com.vaadin.flow.component.HasAriaRole;
 import com.vaadin.flow.component.HasSize;
 import com.vaadin.flow.component.HasText;
 import com.vaadin.flow.component.SignalPropertySupport;
@@ -67,8 +68,8 @@
 @Tag("vaadin-badge")
 @NpmPackage(value = "@vaadin/badge", version = "25.2.0")
 @JsModule("@vaadin/badge/src/vaadin-badge.js")
-public class Badge extends Component
-        implements HasSize, HasText, HasThemeVariant<BadgeVariant> {
+public class Badge extends Component implements HasAriaRole, HasSize, HasText,
+        HasThemeVariant<BadgeVariant> {
 
     private static final String ICON_SLOT = "icon";
 
@@ -309,22 +310,22 @@ public Component getIcon() {
      *
      * @param role
      *            the ARIA role, or {@code null} to clear
+     * @deprecated Use {@link #setAriaRole(String)} instead.
      */
+    @Deprecated(since = "25.3", forRemoval = true)
     public void setRole(String role) {
-        if (role == null) {
-            getElement().removeAttribute("role");
-        } else {
-            getElement().setAttribute("role", role);
-        }
+        setAriaRole(role);
     }
 
     /**
      * Gets the ARIA role attribute of the badge.
      *
      * @return the ARIA role, or {@code null} if not set
+     * @deprecated Use {@link #getAriaRole()} instead.
      */
+    @Deprecated(since = "25.3", forRemoval = true)
     public String getRole() {
-        return getElement().getAttribute("role");
+        return getAriaRole().orElse(null);
     }
 
     private void updateText(String text) {

vaadin-badge-flow-parent/vaadin-badge-flow/src/test/java/com/vaadin/flow/component/badge/tests/BadgeTest.java

@@ -18,6 +18,7 @@
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import com.vaadin.flow.component.HasAriaRole;
 import com.vaadin.flow.component.badge.Badge;
 import com.vaadin.flow.component.html.Span;
 
@@ -183,6 +184,7 @@ void getContent_doesNotReturnTextOrIcon() {
     }
 
     @Test
+    @SuppressWarnings("deprecation")
     void setRole_getRole() {
         var badge = new Badge();
         Assertions.assertNull(badge.getRole());
@@ -194,6 +196,11 @@ void setRole_getRole() {
         Assertions.assertNull(badge.getRole());
     }
 
+    @Test
+    void implementsHasAriaRole() {
+        Assertions.assertTrue(HasAriaRole.class.isAssignableFrom(Badge.class));
+    }
+
     @Test
     void setIcon_getIcon() {
         var badge = new Badge();