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/@webassemblyjs/leb128/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "@webassemblyjs/leb128",
+  "version": "1.13.2",
+  "description": "LEB128 decoder and encoder",
+  "license": "Apache-2.0",
+  "main": "lib/index.js",
+  "module": "esm/index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/xtuc/webassemblyjs.git",
+    "directory": "packages/leb128"
+  },
+  "dependencies": {
+    "@xtuc/long": "4.2.2"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "gitHead": "897aeb784f042a46a00626f1d1cca96159aa5db3"
+}