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/merge-descriptors/package.json

@@ -0,0 +1,39 @@
+{
+  "name": "merge-descriptors",
+  "description": "Merge objects using descriptors",
+  "version": "1.0.3",
+  "author": {
+    "name": "Jonathan Ong",
+    "email": "me@jongleberry.com",
+    "url": "http://jongleberry.com",
+    "twitter": "https://twitter.com/jongleberry"
+  },
+  "contributors": [
+    "Douglas Christopher Wilson <doug@somethingdoug.com>",
+    "Mike Grabowski <grabbou@gmail.com>"
+  ],
+  "license": "MIT",
+  "repository": "sindresorhus/merge-descriptors",
+  "funding": "https://github.com/sponsors/sindresorhus",
+  "devDependencies": {
+    "eslint": "5.9.0",
+    "eslint-config-standard": "12.0.0",
+    "eslint-plugin-import": "2.14.0",
+    "eslint-plugin-node": "7.0.1",
+    "eslint-plugin-promise": "4.0.1",
+    "eslint-plugin-standard": "4.0.0",
+    "mocha": "5.2.0",
+    "nyc": "13.1.0"
+  },
+  "files": [
+    "HISTORY.md",
+    "LICENSE",
+    "README.md",
+    "index.js"
+  ],
+  "scripts": {
+    "lint": "eslint .",
+    "test": "mocha test/",
+    "test-cov": "nyc --reporter=html --reporter=text npm test"
+  }
+}