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/base64/lib/toBase64.js

@@ -0,0 +1,15 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.toBase64 = void 0;
+const constants_1 = require("./constants");
+const createToBase64_1 = require("./createToBase64");
+const encodeSmall = (0, createToBase64_1.createToBase64)();
+exports.toBase64 = !constants_1.hasBuffer
+    ? (uint8) => encodeSmall(uint8, uint8.length)
+    : (uint8) => {
+        const length = uint8.length;
+        if (length <= 48)
+            return encodeSmall(uint8, length);
+        return Buffer.from(uint8).toString('base64');
+    };
+//# sourceMappingURL=toBase64.js.map