Introduce `normalizeQuotaResponse` and `normalizeCombosResponse` helpers
to handle varying API response shapes (array vs wrapped object)
consistently across MCP server and advanced tools. Add optional `meta`
field to checkQuotaOutput schema and update sourceEndpoints to reflect
current API routes.
- Add unit tests for 8 MCP advanced tool handlers (Phase 3)
- Migrate test files from JavaScript to TypeScript (.ts/.tsx)
- Restructure file paths from app/ to src/app/ across all tests
- Refactor route assertions into reusable assertRouteMethods helper
- Add tests for new API routes (compliance, audit-log, evals/[suiteId])
- Update barrel export tests to use consolidated assertion pattern