fix(lint): repair no-case-declarations errors and gate lint in CI

[Ravi chandu Edru (RaviChanduEdru)]

Two small repo-hygiene fixes: npm run lint currently fails on main, and the end-to-end catalogue test runs under a much shorter timeout than it intends.

1. npm run lint fails on main

routeToHash declares hash, queryParams, and query directly inside the case 'catalogue': block, which trips no-case-declarations three times:

src/lib/router.ts
  114:7  error  Unexpected lexical declaration in case block  no-case-declarations
  117:7  error  Unexpected lexical declaration in case block  no-case-declarations
  120:7  error  Unexpected lexical declaration in case block  no-case-declarations

Those bindings leak into the sibling case clauses in the temporal dead zone. Wrapping the clause in braces scopes them correctly — no behavior change.

CI never runs npm run lint (it covers catalogue build, learn build, RDF validation, tsc, a11y, tests, and build), which is how the errors landed unnoticed. This PR adds a Lint step before the type check so it cannot regress again.

The one remaining react-hooks/exhaustive-deps warning in OntologyGraph.tsx is deliberately left alone — eslint exits 0 on warnings so the new gate passes, and changing that effect's dependency array would be a behavior change that doesn't belong in this PR. Happy to add --max-warnings 0 in a follow-up if you'd prefer the stricter gate.

2. Catalogue build test doesn't get the timeout it asks for

compile-catalogue.test.ts passes timeout: 30000 to execSync, but that only bounds the child process — the test itself still ran under Vitest's 5s default testTimeout, so the intended 30s never applied.

That step spawns npx tsx and compiles the whole catalogue. It measured 4.6s and 7.5s across two local runs on Windows, both over the 5s default, and it fails outright on a cold cache:

FAIL scripts/compile-catalogue.test.ts > npm run catalogue:build succeeds with the real catalogue
Error: Test timed out in 5000ms.

The fix hoists the value into a shared constant and passes it as the it() timeout, so the child-process bound and the test bound agree. As the catalogue grows this gets closer to biting CI too.

Verification

• npm run lint — exit 0 (was 3 errors)
• npx tsc -b — exit 0
• npm test — 394/394 passed (was 393 passed, 1 failed)

[Ravi chandu Edru (RaviChanduEdru)]

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