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/@jsonjoy.com/buffers/lib/toUint8Array.js

@@ -0,0 +1,19 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.toUint8Array = void 0;
+const toUint8Array = (data) => {
+    if (data instanceof Uint8Array)
+        return data;
+    if (data instanceof ArrayBuffer)
+        return new Uint8Array(data);
+    if (Array.isArray(data))
+        return new Uint8Array(data);
+    if (typeof Buffer === 'function') {
+        if (Buffer.isBuffer(data))
+            return data;
+        return Buffer.from(data);
+    }
+    throw new Error('UINT8ARRAY_INCOMPATIBLE');
+};
+exports.toUint8Array = toUint8Array;
+//# sourceMappingURL=toUint8Array.js.map