Full-Stack Feature Implementation Plan

I need to implement {{feature}} in my {{tech_stack}} application. Provide: 1. Database schema changes (migrations) 2. API endpoint design (REST/GraphQL) 3. Backend service layer with business logic 4. Frontend component hierarchy 5. State management approach 6. Test cases (unit + integration) 7. Step-by-step implementation order with estimated time Current codebase structure: {{codebase_info}} Constraints: {{constraints}}