feat: add safe project upgrades and production performance fixes

packages/styles/test/fonts.test.ts

@@ -1,5 +1,5 @@
 import { expect, test } from "bun:test";
-import { fontCspSources, renderFontHead } from "../src/index.ts";
+import { fontCspSources, renderFontHead, renderProductionFontHead } from "../src/index.ts";
 
 test("renders subsetted Google and escaped local font markup", () => {
   const html = renderFontHead({
@@ -20,3 +20,13 @@ test("renders subsetted Google and escaped local font markup", () => {
     font: ["https://fonts.gstatic.com"],
   });
 });
+
+test("production font head inlines Google CSS and removes its blocking stylesheet", async () => {
+  const html = await renderProductionFontHead(
+    { google: [{ family: "Plus Jakarta Sans", weights: [400, 700] }] },
+    () => Promise.resolve(new Response('@font-face{font-family:"Plus Jakarta Sans"}')),
+  );
+  expect(html).toContain("data-wrnexus-google-fonts");
+  expect(html).toContain("@font-face");
+  expect(html).not.toContain('<link rel="stylesheet" href="https://fonts.googleapis.com');
+});