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Repository: React e-commerce app, Project Phase: MVP development, Team Workflow: Agile sprints with AI coding assistants, Focus Area: User authentication and payment integration

**ISSUE TITLE**: Implement JWT token refresh mechanism **TYPE**: Feature **PRIORITY**: High (Critical for user session management) **AGENT SUITABILITY**: AI-Ready **DESCRIPTION**: Current authentication system lacks automatic token refresh, causing users to be logged out after 1 hour. Need to implement refresh token rotation for seamless user experience. **ACCEPTANCE CRITERIA**: 1. Refresh tokens generated on login with 7-day expiration 2. Automatic token refresh 5 minutes before expiry 3. Secure refresh endpoint with rotation 4. Graceful fallback to login on refresh failure 5. Unit tests covering refresh scenarios **TECHNICAL NOTES**: Use httpOnly cookies for refresh tokens, implement in auth middleware, consider rate limiting **EFFORT ESTIMATE**: Medium (8-12 hours) **LABELS**: authentication, security, backend **ISSUE TITLE**: Add Stripe payment processing integration **TYPE**: Feature **PRIORITY**: High (MVP requirement) **AGENT SUITABILITY**: Collaborative **DESCRIPTION**: Integrate Stripe payment processing for checkout flow with support for credit cards and digital wallets. **ACCEPTANCE CRITERIA**: 1. Stripe Elements integration for card input 2. Payment intent creation and confirmation 3. Webhook handling for payment status 4. Error handling for declined payments 5. PCI compliance considerations **TECHNICAL NOTES**: Requires Stripe API keys setup, webhook endpoint security, consider 3D Secure **EFFORT ESTIMATE**: Large (16-24 hours) **LABELS**: payment, integration, frontend, backend