🔒 Security Highlights

• Encryption: Uses PBKDF2 to derive a key from the master password, combined with AES-GCM for data confidentiality and integrity.
• Master Password: SHA-256 hashed, stored with checksum.
• Tamper Detection: watchdog monitors critical files; wipes data on unauthorized changes.
• Hidden Files: Data files prefixed with . (hidden on macOS/Linux) and marked hidden on Windows.
• 2FA: Supports TOTP codes for enhanced security.
• Secure Deletion: Overwrites files with random data before deletion.