Files
nexus/internal/api
andy 2446e037ce Add TOTP/2FA support for SSH keyboard-interactive auth
Automatically generate and submit TOTP codes during SSH keyboard-interactive
authentication when a secret is configured for the profile.

Backend:
- Add TOTPSecret field to SSHConfig model
- Detect TOTP/2FA prompts in keyboard-interactive handler using keyword
  matching (verification code, otp, authenticator, 2fa, etc.)
- Generate 6-digit TOTP codes using pquerna/otp library
- Retrieve TOTP secret from vault during connection (keychain or file vault)
- API: SetTOTPSecret, GetTOTPCode, HasTOTPSecret, DeleteTOTPSecret

Frontend:
- Add TOTP/2FA section to SSH profile editor (collapsed by default)
- Password-masked secret input with show/hide toggle
- Save button: encrypts and stores in vault
- Test button: generates a live 6-digit code (shown for 5 seconds)
- Delete button: removes stored secret
- Auto-detect whether secret is already saved (placeholder indicator)
- CSS for TOTP input row, danger button style
2026-04-17 00:00:00 +01:00
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