debug: add step to list build output in CI

Author: devmgn

.github/workflows/build.yml

@@ -18,6 +18,13 @@ jobs:
       - name: Build
         run: pnpm build
 
+      - name: Debug - List build output
+        run: |
+          echo "Working directory: $(pwd)"
+          ls -la
+          echo "---"
+          ls -la .next/ || echo ".next/ not found"
+
       - name: Upload build artifacts
         uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
         with: