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/postcss-modules-extract-imports/README.md

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+# CSS Modules: Extract Imports
+
+[![Build Status](https://travis-ci.org/css-modules/postcss-modules-extract-imports.svg?branch=master)](https://travis-ci.org/css-modules/postcss-modules-extract-imports)
+
+Transforms:
+
+```css
+:local(.continueButton) {
+  composes: button from "library/button.css";
+  color: green;
+}
+```
+
+into:
+
+```css
+:import("library/button.css") {
+  button: __tmp_487387465fczSDGHSABb;
+}
+:local(.continueButton) {
+  composes: __tmp_487387465fczSDGHSABb;
+  color: green;
+}
+```
+
+## Specification
+
+- Only a certain whitelist of properties are inspected. Currently, that whitelist is `['composes']` alone.
+- An extend-import has the following format:
+
+```
+composes: className [... className] from "path/to/file.css",  className [... className], className [... className] from global;
+```
+
+## Options
+
+- `failOnWrongOrder` `bool` generates exception for unpredictable imports order.
+
+```css
+.aa {
+  composes: b from "./b.css";
+  composes: c from "./c.css";
+}
+
+.bb {
+  /* "b.css" should be before "c.css" in this case */
+  composes: c from "./c.css";
+  composes: b from "./b.css";
+}
+```
+
+## Building
+
+```
+npm install
+npm test
+```
+
+[![Build Status](https://travis-ci.org/css-modules/postcss-modules-extract-imports.svg?branch=master)](https://travis-ci.org/css-modules/postcss-modules-extract-imports)
+
+- Lines: [![Coverage Status](https://coveralls.io/repos/css-modules/postcss-modules-extract-imports/badge.svg?branch=master)](https://coveralls.io/r/css-modules/postcss-modules-extract-imports?branch=master)
+- Statements: [![codecov.io](http://codecov.io/github/css-modules/postcss-modules-extract-imports/coverage.svg?branch=master)](http://codecov.io/github/css-modules/postcss-modules-extract-imports?branch=master)
+
+## License
+
+ISC
+
+## With thanks
+
+- Mark Dalgleish
+- Tobias Koppers
+- Guy Bedford
+
+---
+
+Glen Maddern, 2015.