Run 8478 passed every test lane and then failed `Build & push image`. The
Dockerfile's frontend stage copies only frontend/, and `npm run build`
type-checks with tsconfig.json, which covered grammar.test.ts. Its import of
../core/testdata/grammar.json doesn't exist inside that stage. Nothing was
published: the build is the publish and it stopped.
tsconfig.json now excludes `*.test.ts`. The new tsconfig.test.json extends it
with the tests included, and ci.yml's typecheck lane runs that one, so the
tests are still type-checked before anything ships.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
