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-snapshot/README.md

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+# @jsonjoy.com/fs-snapshot
+
+File system snapshot - serialize and deserialize file system trees to binary (CBOR) or JSON format.
+
+## Installation
+
+```bash
+npm install @jsonjoy.com/fs-snapshot
+```
+
+## Features
+
+- Serialize entire file system trees into compact binary (CBOR) or JSON snapshots
+- Restore file system trees from snapshots
+- Supports files, directories, and symbolic links
+- Both synchronous and asynchronous APIs
+- Works with any Node.js-compatible `fs` module
+
+## Usage
+
+### Synchronous API
+
+```ts
+import * as fs from 'fs';
+import { toSnapshotSync, fromSnapshotSync } from '@jsonjoy.com/fs-snapshot';
+
+// Create a snapshot of a directory
+const snapshot = toSnapshotSync({ fs, path: '/path/to/directory' });
+
+// Restore the snapshot to a different location
+fromSnapshotSync(snapshot, { fs, path: '/path/to/restore' });
+```
+
+### Asynchronous API
+
+```ts
+import * as fs from 'fs';
+import { toSnapshot, fromSnapshot } from '@jsonjoy.com/fs-snapshot';
+
+// Create a snapshot of a directory
+const snapshot = await toSnapshot({ fs: fs.promises, path: '/path/to/directory' });
+
+// Restore the snapshot to a different location
+await fromSnapshot(snapshot, { fs: fs.promises, path: '/path/to/restore' });
+```
+
+### Binary (CBOR) Snapshots
+
+Binary snapshots are more compact and faster to serialize/deserialize:
+
+```ts
+import * as fs from 'fs';
+import { toBinarySnapshotSync, fromBinarySnapshotSync } from '@jsonjoy.com/fs-snapshot';
+
+// Create a binary snapshot
+const binary = toBinarySnapshotSync({ fs, path: '/path/to/directory' });
+
+// Restore from binary snapshot
+fromBinarySnapshotSync(binary, { fs, path: '/path/to/restore' });
+```
+
+### JSON Snapshots
+
+JSON snapshots are human-readable and easier to debug:
+
+```ts
+import * as fs from 'fs';
+import { toJsonSnapshotSync, fromJsonSnapshotSync } from '@jsonjoy.com/fs-snapshot';
+
+// Create a JSON snapshot
+const jsonSnapshot = toJsonSnapshotSync({ fs, path: '/path/to/directory' });
+
+// Restore from JSON snapshot
+fromJsonSnapshotSync(jsonSnapshot, { fs, path: '/path/to/restore' });
+```
+
+## Snapshot Format
+
+Snapshots are represented as tuples with the following structure:
+
+- **Folder**: `[0, metadata, { entries }]`
+- **File**: `[1, metadata, Uint8Array]`
+- **Symlink**: `[2, { target: string }]`
+
+## License
+
+Apache-2.0