Initial commit: notification-elements-demo app

Interactive Angular 19 demo for @sda/notification-elements-ui with
6 sections: Bell & Feed, Notification Center, Inbox, Comments &
Threads, Mention Input, and Full-Featured layout. Includes mock
data, dark mode toggle, and real-time event log.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/piscina/test/test-is-buffer-transferred.ts

@@ -0,0 +1,29 @@
+import Piscina from '..';
+import { test } from 'tap';
+import { resolve } from 'path';
+
+function wait () {
+  return new Promise((resolve) => setTimeout(resolve, 1500));
+}
+
+test('transferable objects must be transferred', async ({ equal }) => {
+  const pool = new Piscina({
+    filename: resolve(__dirname, 'fixtures/send-buffer-then-get-length.js'),
+    useAtomics: false
+  });
+  await pool.run({}, { name: 'send' });
+  await wait();
+  const after = await pool.run({}, { name: 'get' });
+  equal(after, 0);
+});
+
+test('objects that implement transferable must be transferred', async ({ equal }) => {
+  const pool = new Piscina({
+    filename: resolve(__dirname, 'fixtures/send-transferrable-then-get-length.js'),
+    useAtomics: false
+  });
+  await pool.run({}, { name: 'send' });
+  await wait();
+  const after = await pool.run({}, { name: 'get' });
+  equal(after, 0);
+});