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/enhanced-resolve/lib/util/identifier.js

@@ -0,0 +1,77 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Ivan Kopeykin @vankop
+*/
+
+"use strict";
+
+const memorize = require("./memoize");
+
+const getUrl = memorize(() => require("url"));
+
+const PATH_QUERY_FRAGMENT_REGEXP =
+	/^(#?(?:\0.|[^?#\0])*)(\?(?:\0.|[^#\0])*)?(#.*)?$/;
+const ZERO_ESCAPE_REGEXP = /\0(.)/g;
+const FILE_REG_EXP = /file:/i;
+
+/**
+ * @param {string} identifier identifier
+ * @returns {[string, string, string] | null} parsed identifier
+ */
+function parseIdentifier(identifier) {
+	if (!identifier) {
+		return null;
+	}
+
+	if (FILE_REG_EXP.test(identifier)) {
+		identifier = getUrl().fileURLToPath(identifier);
+	}
+
+	const firstEscape = identifier.indexOf("\0");
+
+	// Handle `\0`
+	if (firstEscape !== -1) {
+		const match = PATH_QUERY_FRAGMENT_REGEXP.exec(identifier);
+
+		if (!match) return null;
+
+		return [
+			match[1].replace(ZERO_ESCAPE_REGEXP, "$1"),
+			match[2] ? match[2].replace(ZERO_ESCAPE_REGEXP, "$1") : "",
+			match[3] || "",
+		];
+	}
+
+	// Fast path for inputs that don't use \0 escaping.
+	const queryStart = identifier.indexOf("?");
+	// Start at index 1 to ignore a possible leading hash.
+	const fragmentStart = identifier.indexOf("#", 1);
+
+	if (fragmentStart < 0) {
+		if (queryStart < 0) {
+			// No fragment, no query
+			return [identifier, "", ""];
+		}
+
+		// Query, no fragment
+		return [identifier.slice(0, queryStart), identifier.slice(queryStart), ""];
+	}
+
+	if (queryStart < 0 || fragmentStart < queryStart) {
+		// Fragment, no query
+		return [
+			identifier.slice(0, fragmentStart),
+			"",
+			identifier.slice(fragmentStart),
+		];
+	}
+
+	// Query and fragment
+	return [
+		identifier.slice(0, queryStart),
+		identifier.slice(queryStart, fragmentStart),
+		identifier.slice(fragmentStart),
+	];
+}
+
+module.exports.parseIdentifier = parseIdentifier;