refactor(ui): finish style-only component migration

packages/ui/test/ui.test.ts

@@ -30,6 +30,13 @@ test("global UI CSS stays below its migration ratchet", () => {
   expect(gzipSync(new TextEncoder().encode(uiCss())).length).toBeLessThanOrEqual(12_672);
 });
 
+test("only the five scheduled component builds remain without local styles", () => {
+  const unstyled = uiComponentNames().filter(
+    (name) => !/^\s{2,4}style \{/m.test(readFileSync(uiComponentPath(name), "utf8")),
+  );
+  expect(unstyled.sort()).toEqual(["Chart", "Clipboard", "Confetti", "CopyMarkup", "TreeView"]);
+});
+
 test("generated component reference documents every bundled component and its props", () => {
   const reference = JSON.parse(
     readFileSync(join(uiComponentsDir(), "..", "component-reference.json"), "utf8"),