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/webpack-dev-middleware/dist/utils/setupOutputFileSystem.js

@@ -0,0 +1,59 @@
+"use strict";
+
+const memfs = require("memfs");
+
+/** @typedef {import("webpack").MultiCompiler} MultiCompiler */
+/** @typedef {import("../index.js").IncomingMessage} IncomingMessage */
+/** @typedef {import("../index.js").ServerResponse} ServerResponse */
+
+/**
+ * @template {IncomingMessage} Request
+ * @template {ServerResponse} Response
+ * @param {import("../index.js").WithOptional<import("../index.js").Context<Request, Response>, "watching" | "outputFileSystem">} context
+ */
+function setupOutputFileSystem(context) {
+  let outputFileSystem;
+  if (context.options.outputFileSystem) {
+    const {
+      outputFileSystem: outputFileSystemFromOptions
+    } = context.options;
+    outputFileSystem = outputFileSystemFromOptions;
+  }
+  // Don't use `memfs` when developer wants to write everything to a disk, because it doesn't make sense.
+  else if (context.options.writeToDisk !== true) {
+    outputFileSystem = memfs.createFsFromVolume(new memfs.Volume());
+  } else {
+    const isMultiCompiler = /** @type {MultiCompiler} */
+    context.compiler.compilers;
+    if (isMultiCompiler) {
+      // Prefer compiler with `devServer` option or fallback on the first
+      // TODO we need to support webpack-dev-server as a plugin or revisit it
+      const compiler = /** @type {MultiCompiler} */
+      context.compiler.compilers.filter(item => Object.prototype.hasOwnProperty.call(item.options, "devServer") && item.options.devServer !== false);
+      ({
+        outputFileSystem
+      } = compiler[0] || /** @type {MultiCompiler} */
+      context.compiler.compilers[0]);
+    } else {
+      ({
+        outputFileSystem
+      } = context.compiler);
+    }
+  }
+  const compilers = /** @type {MultiCompiler} */
+  context.compiler.compilers || [context.compiler];
+  for (const compiler of compilers) {
+    if (compiler.options.devServer === false) {
+      // eslint-disable-next-line no-continue
+      continue;
+    }
+
+    // @ts-ignore
+    compiler.outputFileSystem = outputFileSystem;
+  }
+
+  // @ts-ignore
+  // eslint-disable-next-line no-param-reassign
+  context.outputFileSystem = outputFileSystem;
+}
+module.exports = setupOutputFileSystem;