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/resolve/test/node_path.js

@@ -0,0 +1,70 @@
+var fs = require('fs');
+var path = require('path');
+var test = require('tape');
+var resolve = require('../');
+
+test('$NODE_PATH', function (t) {
+    t.plan(8);
+
+    var isDir = function (dir, cb) {
+        if (dir === '/node_path' || dir === 'node_path/x') {
+            return cb(null, true);
+        }
+        fs.stat(dir, function (err, stat) {
+            if (!err) {
+                return cb(null, stat.isDirectory());
+            }
+            if (err.code === 'ENOENT' || err.code === 'ENOTDIR') return cb(null, false);
+            return cb(err);
+        });
+    };
+
+    resolve('aaa', {
+        paths: [
+            path.join(__dirname, '/node_path/x'),
+            path.join(__dirname, '/node_path/y')
+        ],
+        basedir: __dirname,
+        isDirectory: isDir
+    }, function (err, res) {
+        t.error(err);
+        t.equal(res, path.join(__dirname, '/node_path/x/aaa/index.js'), 'aaa resolves');
+    });
+
+    resolve('bbb', {
+        paths: [
+            path.join(__dirname, '/node_path/x'),
+            path.join(__dirname, '/node_path/y')
+        ],
+        basedir: __dirname,
+        isDirectory: isDir
+    }, function (err, res) {
+        t.error(err);
+        t.equal(res, path.join(__dirname, '/node_path/y/bbb/index.js'), 'bbb resolves');
+    });
+
+    resolve('ccc', {
+        paths: [
+            path.join(__dirname, '/node_path/x'),
+            path.join(__dirname, '/node_path/y')
+        ],
+        basedir: __dirname,
+        isDirectory: isDir
+    }, function (err, res) {
+        t.error(err);
+        t.equal(res, path.join(__dirname, '/node_path/x/ccc/index.js'), 'ccc resolves');
+    });
+
+    // ensure that relative paths still resolve against the regular `node_modules` correctly
+    resolve('tap', {
+        paths: [
+            'node_path'
+        ],
+        basedir: path.join(__dirname, 'node_path/x'),
+        isDirectory: isDir
+    }, function (err, res) {
+        var root = require('tap/package.json').main; // eslint-disable-line global-require
+        t.error(err);
+        t.equal(res, path.resolve(__dirname, '..', 'node_modules/tap', root), 'tap resolves');
+    });
+});