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/@angular-devkit/core/package.json

@@ -0,0 +1,64 @@
+{
+  "name": "@angular-devkit/core",
+  "version": "19.2.19",
+  "description": "Angular DevKit - Core Utility Library",
+  "main": "src/index.js",
+  "typings": "src/index.d.ts",
+  "keywords": [
+    "Angular CLI",
+    "Angular DevKit",
+    "angular",
+    "core",
+    "devkit",
+    "sdk"
+  ],
+  "exports": {
+    ".": {
+      "types": "./src/index.d.ts",
+      "default": "./src/index.js"
+    },
+    "./node": {
+      "types": "./node/index.d.ts",
+      "default": "./node/index.js"
+    },
+    "./node/testing": {
+      "types": "./node/testing/index.d.ts",
+      "default": "./node/testing/index.js"
+    },
+    "./package.json": "./package.json",
+    "./*": "./*.js",
+    "./*.js": "./*.js"
+  },
+  "dependencies": {
+    "ajv": "8.17.1",
+    "ajv-formats": "3.0.1",
+    "jsonc-parser": "3.3.1",
+    "picomatch": "4.0.2",
+    "rxjs": "7.8.1",
+    "source-map": "0.7.4"
+  },
+  "peerDependencies": {
+    "chokidar": "^4.0.0"
+  },
+  "peerDependenciesMeta": {
+    "chokidar": {
+      "optional": true
+    }
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/angular/angular-cli.git"
+  },
+  "packageManager": "pnpm@9.15.6",
+  "engines": {
+    "node": "^18.19.1 || ^20.11.1 || >=22.0.0",
+    "npm": "^6.11.0 || ^7.5.6 || >=8.0.0",
+    "yarn": ">= 1.13.0"
+  },
+  "author": "Angular Authors",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/angular/angular-cli/issues"
+  },
+  "homepage": "https://github.com/angular/angular-cli"
+}