fix(ui): keep floating menus inside viewport and clipping containers

packages/ui/test/account-shell-regressions.test.ts

@@ -246,3 +246,9 @@ describe("account shell UI regressions", () => {
     expect(source("Footer")).toMatch(/\.wrn-footer__copyright-right\s*\{\s*grid-column: 3;/);
   });
 });
+
+test('floating selection and preference panels opt into shared boundary handling', async () => {
+  for (const name of ['PreferenceSwitcher', 'ComboBox', 'AdvancedSelect', 'TimePicker', 'DataTable', 'Navbar']) {
+    expect(readFileSync(uiComponentPath(name), 'utf8')).toContain('data-wrn-anchored="true"');
+  }
+});