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/@jsonjoy.com/fs-node/lib/Stats.d.ts

@@ -0,0 +1,41 @@
+import { Node } from '@jsonjoy.com/fs-core';
+export type TStatNumber = number | bigint;
+/**
+ * Statistics about a file/directory, like `fs.Stats`.
+ */
+export declare class Stats<T = TStatNumber> {
+    static build(node: Node, bigint: false): Stats<number>;
+    static build(node: Node, bigint: true): Stats<bigint>;
+    static build(node: Node, bigint?: boolean): Stats<TStatNumber>;
+    uid: T;
+    gid: T;
+    rdev: T;
+    blksize: T;
+    ino: T;
+    size: T;
+    blocks: T;
+    atime: Date;
+    mtime: Date;
+    ctime: Date;
+    birthtime: Date;
+    atimeMs: T;
+    mtimeMs: T;
+    ctimeMs: T;
+    birthtimeMs: T;
+    atimeNs: T extends bigint ? T : undefined;
+    mtimeNs: T extends bigint ? T : undefined;
+    ctimeNs: T extends bigint ? T : undefined;
+    birthtimeNs: T extends bigint ? T : undefined;
+    dev: T;
+    mode: T;
+    nlink: T;
+    private _checkModeProperty;
+    isDirectory(): boolean;
+    isFile(): boolean;
+    isBlockDevice(): boolean;
+    isCharacterDevice(): boolean;
+    isSymbolicLink(): boolean;
+    isFIFO(): boolean;
+    isSocket(): boolean;
+}
+export default Stats;