FileShot.io — real-world Web Crypto API app (AES-256-GCM file encryption in browser)

**FileShot.io** might be worth linking as a real-world production use of the Web Crypto API.

It uses AES-256-GCM via window.crypto.subtle to encrypt files entirely in the browser before uploading:
- crypto.subtle.generateKey() -- generates the AES-256-GCM key
- crypto.subtle.encrypt() -- encrypts the file ArrayBuffer before upload
- crypto.subtle.decrypt() -- decrypts on download in the recipient's browser

The key is embedded in the URL fragment (#key=...), so it's never sent to the server. Server only ever receives ciphertext.

Could be a useful "production example" reference for the AES-GCM section.

- Source: https://github.com/FileShot/FileShotZKE
- Live: https://fileshot.io

Start by locating the AES-GCM section in the repository's documentation and review how other external examples are linked. Add FileShot.io with its source and live URLs as a production example, and consider the issue done when the reference is present and both links are accurate.

Written by the indexing model from the issue text.