refactor(ui): localize progress and loading styles

packages/ui/test/ui.test.ts

@@ -1,4 +1,5 @@
 import { expect, test } from "bun:test";
+import { gzipSync } from "bun";
 import { readFileSync } from "node:fs";
 import { join } from "node:path";
 import { compileWireFile, parse } from "../../compiler/src/index.ts";
@@ -18,6 +19,10 @@ test("bundled UI assets are discoverable and readable", () => {
   expect(uiCss()).toContain("--wire-");
 });
 
+test("global UI CSS stays below its migration ratchet", () => {
+  expect(gzipSync(new TextEncoder().encode(uiCss())).length).toBeLessThanOrEqual(26_004);
+});
+
 test("generated component reference documents every bundled component and its props", () => {
   const reference = JSON.parse(
     readFileSync(join(uiComponentsDir(), "..", "component-reference.json"), "utf8"),