301cfc5c9e
A vi.mock('$app/navigation') with no factory does not auto-resolve to a
__mocks__ file for SvelteKit virtual modules — it substitutes some
exports and leaves others (replaceState) bound to the live router, which
is exactly the PR #657 failure. This Node-mode source scan, mirroring
no-async-mock-factories and no-duplicate-mock-ids, fails at every vitest
invocation if any *.svelte.{spec,test}.ts reintroduces the pattern, and
forecloses ADR-012's rejected Option C. Part of #560.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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