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/tapable/lib/AsyncSeriesWaterfallHook.js

@@ -0,0 +1,48 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Hook = require("./Hook");
+const HookCodeFactory = require("./HookCodeFactory");
+
+class AsyncSeriesWaterfallHookCodeFactory extends HookCodeFactory {
+	content({ onError, onResult, _onDone }) {
+		return this.callTapsSeries({
+			onError: (i, err, next, doneBreak) => onError(err) + doneBreak(true),
+			onResult: (i, result, next) => {
+				let code = "";
+				code += `if(${result} !== undefined) {\n`;
+				code += `${this._args[0]} = ${result};\n`;
+				code += "}\n";
+				code += next();
+				return code;
+			},
+			onDone: () => onResult(this._args[0])
+		});
+	}
+}
+
+const factory = new AsyncSeriesWaterfallHookCodeFactory();
+
+function COMPILE(options) {
+	factory.setup(this, options);
+	return factory.create(options);
+}
+
+function AsyncSeriesWaterfallHook(args = [], name = undefined) {
+	if (args.length < 1) {
+		throw new Error("Waterfall hooks must have at least one argument");
+	}
+	const hook = new Hook(args, name);
+	hook.constructor = AsyncSeriesWaterfallHook;
+	hook.compile = COMPILE;
+	hook._call = undefined;
+	hook.call = undefined;
+	return hook;
+}
+
+AsyncSeriesWaterfallHook.prototype = null;
+
+module.exports = AsyncSeriesWaterfallHook;