feat: Add CI workflow to detect broken internal links

.github/workflows/check-links.yml

@@ -0,0 +1,38 @@
+name: Check Links
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  check-links:
+    name: Check Internal Links
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: '22'
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build static site
+        run: pnpm build
+        env:
+          NODE_OPTIONS: --max-old-space-size=8192
+
+      - name: Check for broken links
+        run: pnpm check-links

package.json

@@ -26,6 +26,7 @@
     "lint:fix": "eslint --fix .",
     "format": "prettier --write .",
     "check-format": "prettier --check .",
+    "check-links": "tsx scripts/check-broken-links.ts",
     "quiz:validate": "tsx scripts/quiz-dev.ts validate",
     "quiz:create": "tsx scripts/quiz-dev.ts create",
     "quiz:list": "tsx scripts/quiz-dev.ts list",
@@ -123,6 +124,7 @@
     "@tailwindcss/postcss": "^4.1.18",
     "@tailwindcss/typography": "0.5.19",
     "@types/js-yaml": "^4.0.9",
+    "@types/jsdom": "^28.0.0",
     "@types/node": "^25.2.3",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -134,6 +136,7 @@
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-prettier": "^5.5.5",
     "fast-glob": "^3.3.3",
+    "jsdom": "^28.1.0",
     "postcss": "^8.5.6",
     "prettier": "^3.8.1",
     "sharp": "^0.34.5",