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/babel-loader/lib/injectCaller.js

@@ -0,0 +1,17 @@
+module.exports = function injectCaller(opts, target) {
+  return Object.assign({}, opts, {
+    caller: Object.assign({
+      name: "babel-loader",
+      // Provide plugins with insight into webpack target.
+      // https://github.com/babel/babel-loader/issues/787
+      target,
+      // Webpack >= 2 supports ESM and dynamic import.
+      supportsStaticESM: true,
+      supportsDynamicImport: true,
+      // Webpack 5 supports TLA behind a flag. We enable it by default
+      // for Babel, and then webpack will throw an error if the experimental
+      // flag isn't enabled.
+      supportsTopLevelAwait: true
+    }, opts.caller)
+  });
+};