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/concat.js

@@ -0,0 +1,36 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.listToUint8 = exports.concatList = exports.concat = void 0;
+const concat = (a, b) => {
+    const res = new Uint8Array(a.length + b.length);
+    res.set(a);
+    res.set(b, a.length);
+    return res;
+};
+exports.concat = concat;
+const concatList = (list) => {
+    const length = list.length;
+    let size = 0, offset = 0;
+    for (let i = 0; i < length; i++)
+        size += list[i].length;
+    const res = new Uint8Array(size);
+    for (let i = 0; i < length; i++) {
+        const item = list[i];
+        res.set(item, offset);
+        offset += item.length;
+    }
+    return res;
+};
+exports.concatList = concatList;
+const listToUint8 = (list) => {
+    switch (list.length) {
+        case 0:
+            return new Uint8Array(0);
+        case 1:
+            return list[0];
+        default:
+            return (0, exports.concatList)(list);
+    }
+};
+exports.listToUint8 = listToUint8;
+//# sourceMappingURL=concat.js.map