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/domutils/lib/esm/manipulation.d.ts

@@ -0,0 +1,49 @@
+import type { ChildNode, ParentNode } from "domhandler";
+/**
+ * Remove an element from the dom
+ *
+ * @category Manipulation
+ * @param elem The element to be removed
+ */
+export declare function removeElement(elem: ChildNode): void;
+/**
+ * Replace an element in the dom
+ *
+ * @category Manipulation
+ * @param elem The element to be replaced
+ * @param replacement The element to be added
+ */
+export declare function replaceElement(elem: ChildNode, replacement: ChildNode): void;
+/**
+ * Append a child to an element.
+ *
+ * @category Manipulation
+ * @param parent The element to append to.
+ * @param child The element to be added as a child.
+ */
+export declare function appendChild(parent: ParentNode, child: ChildNode): void;
+/**
+ * Append an element after another.
+ *
+ * @category Manipulation
+ * @param elem The element to append after.
+ * @param next The element be added.
+ */
+export declare function append(elem: ChildNode, next: ChildNode): void;
+/**
+ * Prepend a child to an element.
+ *
+ * @category Manipulation
+ * @param parent The element to prepend before.
+ * @param child The element to be added as a child.
+ */
+export declare function prependChild(parent: ParentNode, child: ChildNode): void;
+/**
+ * Prepend an element before another.
+ *
+ * @category Manipulation
+ * @param elem The element to prepend before.
+ * @param prev The element be added.
+ */
+export declare function prepend(elem: ChildNode, prev: ChildNode): void;
+//# sourceMappingURL=manipulation.d.ts.map