Fix round 1: the deleted api-block-*.test.ts files were not fully superseded
by the apis-* siblings as claimed. Ports back, using apis {} fixtures:
- brace-inside-a-string-literal response-section scanner regression test
- type erasure of response/error bodies before browser emission
- client-side response-error-not-swallowed / transport-failure-fallback,
executed via dynamic import of a generated browser module
- the full SSR execution suite: response payload binding, error section
status/message/data binding, {#each} failure propagation, all executed
via dynamic import + a real load/api call chain (not string checks)
- the four real-tsc enforcement tests (matching/wrong-type/extra-field/
missing-field), plus the B1 cross-page collision guard and the B6
export-for-noUnusedLocals guard
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>