- Import swagger-ui-express, swagger-jsdoc, yamljs in app.js and index.js
- Load server/openapi.yaml as base spec
- Configure swagger-jsdoc to merge JSDoc comments from route files
- Mount Swagger UI at /api/swagger (publicly accessible)
- Add authentication banner explaining cookie + CSRF flow
- Ensure spec loads from both createApp (tests) and index.js (production)
