ci: broken-link check via linkinator

After pnpm build, stand up a throwaway static server on out/ and
crawl every internal link recursively. Any 404/anchor miss fails
the workflow.

- scripts/check-links.sh: serves out/ via python3 -m http.server,
  waits for readiness, invokes linkinator. Wrapper exists because
  linkinator's CLI rejects --server-root when combined with a URL
  and can't resolve absolute hrefs (/en/api-reference etc.) against
  a local file path without a server.
- package.json: adds linkinator devDep + `check-links` script so
  devs can run the same check locally with `pnpm check-links`.
- deploy-dev.yml + deploy-prod.yml: add Check links step after
  Build. Verified locally: 65 links scanned, all green.

External URLs are skipped — their drift is a third-party concern
that would fail CI on transient upstream outages.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Mlaz-code

.github/workflows/deploy-dev.yml

@@ -43,6 +43,9 @@ jobs:
       - name: Build
         run: pnpm build
 
+      - name: Check links
+        run: pnpm check-links
+
   deploy-preview:
     name: Deploy Preview
     needs: validate

.github/workflows/deploy-prod.yml

@@ -58,6 +58,14 @@ jobs:
       - name: Build
         run: pnpm build
 
+      - name: Check links
+        # Spins up a local static server on out/ and crawls every
+        # internal link with linkinator. Catches dead anchors and
+        # rotten internal paths before they ship to docs.sharpapi.io.
+        # External URLs are skipped — their drift is a third-party
+        # concern and would fail CI on transient upstream outages.
+        run: pnpm check-links
+
   backup-deployment:
     name: Backup Current Deployment
     runs-on: ubuntu-latest