Removing emptry groups after the issues are gone.

src/ui/ui.css

@@ -184,6 +184,24 @@
   padding-right: 10px;
 }
 
+.abledom-issue_warning + .abledom-issue-group-issues {
+  border-left: 3px solid rgba(163, 82, 1, 0.7);
+}
+#abledom-report.abledom-align-right
+  .abledom-issue_warning
+  + .abledom-issue-group-issues {
+  border-right: 3px solid rgba(163, 82, 1, 0.7);
+}
+
+.abledom-issue_info + .abledom-issue-group-issues {
+  border-left: 3px solid rgba(0, 0, 255, 0.7);
+}
+#abledom-report.abledom-align-right
+  .abledom-issue_info
+  + .abledom-issue-group-issues {
+  border-right: 3px solid rgba(0, 0, 255, 0.7);
+}
+
 .abledom-issue-group-title {
   background-color: rgba(164, 2, 2, 0.7);
   color: white;

src/ui/ui.ts

@@ -976,11 +976,33 @@ export class IssuesUI {
 
       if (container && countElement) {
         const count = container.children.length;
+
+        if (count === 0) {
+          this._removeIssueGroup(groupName, container);
+          continue;
+        }
+
         countElement.textContent = `${count}`;
       }
     }
   }
 
+  private _removeIssueGroup(
+    groupName: string,
+    container: HTMLElementWithAbleDOMUIFlag,
+  ): void {
+    const groupElement = container.parentElement;
+
+    if (groupElement?.classList.contains("abledom-issue-group")) {
+      groupElement.remove();
+    } else {
+      container.remove();
+    }
+
+    delete this._issueGroupContainers[groupName];
+    delete this._issueGroupCountElements[groupName];
+  }
+
   removeIssue(issue: IssueUI) {
     if (!this._issues.has(issue)) {
       return;

tests/notificationsUI/notificationsUI.test.ts

@@ -213,6 +213,12 @@ test.describe("Notifications UI", () => {
 
       // All 3 label issues should be gone.
       expect(await getVisibleIssueCount(page)).toBe(issuesBefore - 3);
+
+      // Empty group title should be removed, not shown with "0".
+      const labelGroupTitles = page.locator(
+        `${groupTitleSelector}:has-text("Missing text label")`,
+      );
+      await expect(labelGroupTitles).toHaveCount(0);
     });
 
     test("group close button hides all issues within the group", async ({