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Add Two-Factor Authentication (2FA) Support #39
Description
Feature: Two-Factor Authentication (2FA) Support
Overview
Add Two-Factor Authentication as an additional security layer for authenticated users in the Settings page.
Parent Issue
Part of #37 - Add Settings Page with Authentication and User Management
Requirements
2FA Setup Flow
- Add "Enable 2FA" option in Settings page (authenticated users only)
- QR code generation for TOTP apps (Google Authenticator, Authy, etc.)
- Manual secret key entry option as backup
- Verification step during setup (user enters code to confirm)
- Success confirmation with backup codes
2FA Management
- Display 2FA status (enabled/disabled) in Settings
- "Disable 2FA" option with password confirmation
- Regenerate backup codes functionality
- Clear visual indicators of 2FA protection status
Authentication Flow
- Prompt for 2FA code during sign-in (if enabled)
- Backup code entry option
- "Trust this device" option (optional)
- Proper error handling for invalid codes
Technical Implementation
- Integrate with Supabase Auth 2FA capabilities
- Update
useAuth.tscomposable for 2FA flows - Add 2FA status to user profile state
- Implement TOTP token validation
- Generate and store backup codes securely
UI Components
- 2FA setup modal with QR code display
- 2FA management section in Settings
- Code input component for verification
- Backup codes display modal
- Status indicators and help text
Acceptance Criteria
- Users can enable 2FA from Settings page
- QR code works with major authenticator apps
- 2FA is required for sign-in when enabled
- Users can disable 2FA with proper verification
- Backup codes provide alternative access method
- Clean, intuitive UI following Ionic design patterns
- Proper error handling and user feedback
- Mobile-responsive implementation
Technical Notes
- Use Supabase's built-in MFA (Multi-Factor Authentication) features
- Follow TOTP standard (RFC 6238) for compatibility
- Implement secure backup code generation and storage
- Consider rate limiting for code verification attempts
- Ensure proper cleanup when 2FA is disabled
Priority
Medium - Security enhancement, not core functionality
Related Issues
- Add Settings Page with Authentication and User Management #37 - Parent issue for Settings page
🤖 Generated with Claude Code
Co-Authored-By: Claude noreply@anthropic.com
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