Mock libraries are imported only in test files

Mock libraries like msw, nock, and sinon are designed to intercept network calls and fabricate responses. When they leak into production source files, real API requests get hijacked by test doubles — users see stubbed data, webhooks never reach their destinations, and payment flows silently return mock success responses. This also bloats production bundles with test-only code and can mask outages because the mock always returns 200 OK regardless of backend health.

Move each flagged mock import into the corresponding test file under tests/ or __tests__/, or into a test-only setup module. If the production file genuinely needs a stubbed response (feature flag, offline mode), use a real implementation behind an environment check instead of a mock library.

// tests/setup.ts — test-only, never imported from src/
import { setupServer } from 'msw/node'
export const server = setupServer()