ci: split a11y tests using matrix (#819)

Author: wojtekmaj

.github/workflows/ci.yml

@@ -92,6 +92,9 @@ jobs:
 
   a11y:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        mode: [dark, light]
 
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
@@ -111,10 +114,11 @@ jobs:
       - name: 🏗️ Build project
         run: pnpm build
 
-      - name: ♿ Accessibility audit (Lighthouse - dark & light mode)
+      - name: ♿ Accessibility audit (Lighthouse - ${{ matrix.mode }} mode)
         run: ./scripts/lighthouse-a11y.sh
         env:
           LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}
+          LIGHTHOUSE_COLOR_MODE: ${{ matrix.mode }}
 
   knip:
     runs-on: ubuntu-latest

scripts/lighthouse-a11y.sh

@@ -7,12 +7,20 @@
 
 set -e
 
-echo "🌙 Running Lighthouse accessibility audit (dark mode)..."
-LIGHTHOUSE_COLOR_MODE=dark pnpx @lhci/cli autorun --upload.githubStatusContextSuffix="/dark"
+case "${LIGHTHOUSE_COLOR_MODE}" in
+  dark)
+    echo "🌙 Running Lighthouse accessibility audit (dark mode)..."
+    pnpx @lhci/cli autorun --upload.githubStatusContextSuffix="/dark"
+    ;;
+  light)
+    echo "☀️ Running Lighthouse accessibility audit (light mode)..."
+    pnpx @lhci/cli autorun --upload.githubStatusContextSuffix="/light"
+    ;;
+  *)
+    echo "⚠️ Missing or invalid LIGHTHOUSE_COLOR_MODE. Use 'dark' or 'light'."
+    exit 1
+    ;;
+esac
 
 echo ""
-echo "☀️  Running Lighthouse accessibility audit (light mode)..."
-LIGHTHOUSE_COLOR_MODE=light pnpx @lhci/cli autorun --upload.githubStatusContextSuffix="/light"
-
-echo ""
-echo "✅ Accessibility audits completed for both color modes"
+echo "✅ Accessibility audit completed"