fix(ui): polish linked catalog cards

packages/ui/test/ui.test.ts

@@ -82,6 +82,9 @@ test("component-system CSS includes responsive, theme-token, focus, and reduced-
   expect(css).toMatch(/:root\s*\{[^}]*--color-violet-600: var\(--wire-color-primary\)/s);
   expect(css).toContain(".wire-bg-primary");
   expect(css).toContain(".wire-text-muted");
+  expect(css).toContain(".wire-visually-hidden");
+  expect(css).toContain(".wire-catalog-card--channel::before");
+  expect(css).toContain(".wire-catalog-card--integration::before");
 });
 
 test("page shells leave background ownership to the page", () => {