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/minimatch/dist/commonjs/assert-valid-pattern.js

@@ -0,0 +1,14 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.assertValidPattern = void 0;
+const MAX_PATTERN_LENGTH = 1024 * 64;
+const assertValidPattern = (pattern) => {
+    if (typeof pattern !== 'string') {
+        throw new TypeError('invalid pattern');
+    }
+    if (pattern.length > MAX_PATTERN_LENGTH) {
+        throw new TypeError('pattern is too long');
+    }
+};
+exports.assertValidPattern = assertValidPattern;
+//# sourceMappingURL=assert-valid-pattern.js.map