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/@tufjs/models/dist/timestamp.d.ts

@@ -0,0 +1,21 @@
+import { MetadataKind, Signed, SignedOptions } from './base';
+import { MetaFile } from './file';
+import { JSONObject } from './utils';
+interface TimestampOptions extends SignedOptions {
+    snapshotMeta?: MetaFile;
+}
+/**
+ * A container for the signed part of timestamp metadata.
+ *
+ * A top-level that specifies the latest version of the snapshot role metadata file,
+ * and hence the latest versions of all metadata and targets on the repository.
+ */
+export declare class Timestamp extends Signed {
+    readonly type = MetadataKind.Timestamp;
+    readonly snapshotMeta: MetaFile;
+    constructor(options: TimestampOptions);
+    equals(other: Timestamp): boolean;
+    toJSON(): JSONObject;
+    static fromJSON(data: JSONObject): Timestamp;
+}
+export {};