The async vi.mock factory in EnrichmentBlock.svelte.spec.ts performed an
`await import(...)` in its body — the same mechanism #535/#546 fixed for
pdfjs-dist. Issue #553: when Chromium's playwright route handler fetches
the mocked module after the worker's birpc channel has closed, the
factory's RPC roundtrip raises `[birpc] rpc is closed, cannot call
"resolveManualMock"` and the run exits 1.
Migrate EnrichmentBlock from the deprecated `$app/stores.navigating`
(store) to the modern `$app/state.navigating` (reactive proxy). The
spec uses vi.hoisted + a sync vi.mock factory with a getter that defers
the read — no dynamic import in the factory body. Delete the now-unused
__mocks__/navigatingStore.ts.
Fix path applied: $app/state migration (Markus's recommendation /
Felix's Path 2). See ADR-012.
Refs #553
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
