Scaffolding Modern API Routes

Translate legacy Express route definitions and middleware chains into modern Next.js Route Handlers with built-in validation and unified session management.

Objective

Rebuild the documented API surface to ensure 1:1 functional parity with the legacy system, focusing on mapping Express Middlewares to Next.js Route Guards.

Instructions for the Scaffold Subagent

Copy this checklist and track your progress:

Task Progress:
- [ ] Step 1: Analyze API Contracts
- [ ] Step 2: Establish Route Architecture
- [ ] Step 3: Map Middleware to Guards
- [ ] Step 4: Implement Zod-Backed Request Validation
- [ ] Step 5: Implement Resource Handlers