Sherozabdulghaffar/vaultguard ? reverse-engineered prompt

Build me a Windows password manager and 2FA app that works fully on my own machine, with a desktop app and a browser extension for Chrome, Edge, and Firefox.

I want to save logins, one time codes, and passkeys in an encrypted vault, then unlock it with a master password and, if possible, Windows Hello or a security key. The extension should detect login forms, autofill usernames and passwords, show my 2FA codes, and help me add new accounts by scanning QR codes or pasting an otpauth link. It should also support passkeys on sites that use WebAuthn.

Make it feel polished and easy to use, with a vault view, generator, backup and restore, CSV import and export, and a simple way to pair the extension with the desktop app. Keep everything local, with no cloud sync or tracking. If you need to check current docs for Electron or browser extension APIs, go ahead and look them up online.