Fix smoketest CSS bundle test broken pipe issue

Co-authored-by: rajbos <6085745+rajbos@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy-to-pages.yml

@@ -140,8 +140,9 @@ jobs:
           fi
           
           echo "Testing CSS bundle at: $CSS_URL"
-          CSS_CONTENT=$(curl -fsSL "$CSS_URL" | head -c 500 || true)
-          if echo "$CSS_CONTENT" | grep -q "body\|html\|\."; then
+          CSS_CONTENT=$(curl -fsSL "$CSS_URL" || exit 1)
+          
+          if echo "$CSS_CONTENT" | head -c 2000 | grep -q "body\|html\|\."; then
             echo "✅ CSS bundle is accessible and contains expected styles"
           else
             echo "❌ CSS bundle is not accessible or doesn't contain expected styles"