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/webpack-sources/lib/helpers/getName.js

@@ -0,0 +1,21 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+/** @typedef {import("../Source").RawSourceMap} RawSourceMap */
+
+/**
+ * @param {RawSourceMap} sourceMap source map
+ * @param {number} index index
+ * @returns {string | undefined | null} name
+ */
+const getName = (sourceMap, index) => {
+	if (index < 0) return null;
+	const { names } = sourceMap;
+	return names[index];
+};
+
+module.exports = getName;