feat: sync showcase with WRNexusJS 0.8.72 and @wrnexus/ui 0.8.88

- Sync app, public, scripts, test and examples from the framework's
  component-showcase: redesigned component demos, marketing blocks under
  /blocks, template and preview galleries, distinct Timeline/Section
  variants, Chat Bubble receipts, a top-placement Drawer demo, and the
  playground code panel fix (objects in array props no longer blank out).
- Standalone adaptations kept: the generator and tests read
  component-reference.json from the published @wrnexus/ui, and tests use
  the published @wrnexus/compiler and @wrnexus/syntax.
- Dependencies: every @wrnexus/* package to its latest release (ui 0.8.88,
  styles 0.8.26, core 0.8.16, cli 0.8.72, ...), happy-dom for the
  playground tests, Tailwind 4.3; bun.lock and package-lock.json refreshed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/playground-interaction.test.ts

@@ -0,0 +1,39 @@
+import { test, expect } from "bun:test";
+import { readFileSync } from "node:fs";
+import { Window } from "happy-dom";
+
+test("preview input never requests a replacement; settings still do", async () => {
+  const window = new Window({ url: "http://localhost/components/input" });
+  window.document.body.innerHTML = `<div data-playground data-playground-component="Input">
+    <div data-playground-preview><input aria-label="Example" /></div>
+    <form data-playground-form><input name="label" value="Name" /></form>
+    <pre data-playground-code></pre><span data-playground-status></span>
+  </div>`;
+  let requests = 0;
+  window.fetch = async () => {
+    requests++;
+    return new window.Response("", { status: 500 });
+  };
+  window.eval(readFileSync(new URL("../public/playground.js", import.meta.url), "utf8"));
+  const preview = window.document.querySelector("[data-playground-preview] input")!;
+  preview.dispatchEvent(new window.Event("input", { bubbles: true }));
+  preview.dispatchEvent(new window.Event("change", { bubbles: true }));
+  await new Promise((resolve) => setTimeout(resolve, 250));
+  expect(requests).toBe(0);
+  window.document
+    .querySelector("[data-playground-form] input")!
+    .dispatchEvent(new window.Event("input", { bubbles: true }));
+  await new Promise((resolve) => setTimeout(resolve, 250));
+  expect(requests).toBe(1);
+  await window.happyDOM.close();
+});
+
+test("stored theme updates its stylesheet before the theme runtime loads", async () => {
+  const window = new Window({ url: "http://localhost/components/alert" });
+  window.document.cookie = "wrn-ui-mode=light;path=/";
+  window.document.head.innerHTML = '<link rel="stylesheet" data-wrnexus-theme href="/__wrnexus/theme/dark/violet.css">';
+  window.eval(readFileSync(new URL("../public/playground.js", import.meta.url), "utf8"));
+  expect(window.document.documentElement.dataset.theme).toBe("light");
+  expect(window.document.querySelector("link")?.getAttribute("href")).toBe("/__wrnexus/theme/light/violet.css");
+  await window.happyDOM.close();
+});