next-auth

32d874c1 - fix(next-auth): repair red v4 CI (lint + pre-existing test drift) (#13447)

fix(next-auth): repair red v4 CI (lint + pre-existing test drift) (#13447) * test(next-auth): use Reflect.deleteProperty to satisfy no-dynamic-delete lint * test(next-auth): repair v4 test suite (dependency drift) The v4 test suite had been red since ~Oct 2025 due to dependency drift. Three independent root causes, all unrelated to test logic: - Pin headers-polyfill to 3.0.4 via pnpm override. @mswjs/interceptors@0.16.6 does `require("headers-polyfill/lib")`, but headers-polyfill >=3.1.x ships an `exports` map that blocks the deep import, breaking all 7 client suites. - Compile the core jest project's JSX with Preact's automatic runtime (swc.preact.config.js). The default pages are Preact components rendered by `preact-render-to-string`; the React runtime emitted React elements that render to an empty body, failing assert.test.ts. - Mock `../src/core` instead of `jest.spyOn(core, "AuthHandler")` in getServerSession.test.ts. SWC compiles named exports to non-configurable getters, so spyOn threw "Cannot redefine property". Also update the stale "Send e-mail to first address only" email test to assert that an address list with multiple `@` symbols is now rejected, matching the hardened normalizer.