Explore-Plan-Code Workflow

Please read the following files and understand the project structure,
but don't write any code yet:
- src/components/UserList.tsx
- src/services/userService.ts
- docs/api.md

I need to add user search functionality. Please first understand
the existing user management logic.

User: Please read all files in the src/auth/ directory and understand
the current authentication system implementation. Don't modify any code.
I want to add two-factor authentication functionality.

Claude: I'll analyze your authentication system...
[Claude reads and analyzes files]

I've analyzed your authentication system and found these key components:

1. AuthService (src/auth/AuthService.ts) - Handles login/logout
2. JWT middleware (src/auth/middleware.ts) - Token validation
3. User model (src/auth/User.ts) - User data structure
4. Login component (src/auth/LoginForm.tsx) - UI interface

Current architecture uses JWT tokens with 24-hour expiration.
For 2FA integration, I recommend...

Based on your analysis of the auth system, please create a detailed plan
for implementing 2FA. Include:
- Required code changes
- New dependencies needed
- Database schema updates
- Testing strategy

## 2FA Implementation Plan

### Phase 1: Backend Changes
1. Install `speakeasy` library for TOTP generation
2. Add 2FA fields to User model:
   - `twoFactorSecret` (encrypted)
   - `twoFactorEnabled` (boolean)
3. Create new API endpoints:
   - POST /auth/2fa/setup - Generate QR code
   - POST /auth/2fa/verify - Verify TOTP code
   - POST /auth/2fa/disable - Disable 2FA

### Phase 2: Frontend Changes
1. Add 2FA setup component with QR code display
2. Modify login flow to include TOTP verification
3. Add 2FA management to user settings

### Phase 3: Testing
1. Unit tests for TOTP generation/validation
2. Integration tests for auth flow
3. E2E tests for complete user journey

Let's implement the 2FA feature following the plan.
Start with Phase 1 - the backend changes.
Implement each file one at a time.

1. First: Install dependencies and update User model
2. Then: Create 2FA service with TOTP functions
3. Next: Add API endpoints
4. Then: Update authentication middleware
5. Finally: Create frontend components

Now let's finalize the 2FA implementation:
1. Run all tests and fix any issues
2. Update documentation
3. Create a git commit with proper message

Examine the shopping cart component and plan how to add a "save for later" feature

Please thoroughly analyze the entire e-commerce system architecture.
Read the main components, understand the data flow, and identify
the key integration points. This is for a major refactoring project.

Create a high-level plan for the user notification system.
We'll implement it in multiple sprints, so focus on the overall architecture
and major milestones.